Database Users

[UPDATED][EXPLANATION] Display Banding 16bit Vs 24bit (Video + app tests)

Ok, so there are quite a few threads about colour banding, 4 or 5 I think. All/most saying different things, sometimes the same things in different ways
Neways, although I really didn't want to add to it, I wanted to show everyone a few things about android colour.
Note: In order to really do these tests you need to set brightness to 100% so there is a common mark from which to draw any conclusions.
I believe the following:
1. It's apparent that super duper amazing amoled plus and then some Shows more detail (maybe due to sub pixel processing nature of the screen).
2. Due to point 1. and added to the fact that by default and quite often chosen by developers that most apps are set to use the 565 mode (5bits red, 6bits green (human eye sees more green) 5bits blue) or 16bit mode for performance reasons. With this we see banding in some colour transitions (More so green)
3. There are many bitmaps/images/textures that have been palletised in conversion and compressed for in-app performance reasons. This also produces artefacts that can be seen on our wonderful displays
So in collusion to those points it quite impossible to say banding is a software problem or hardware problem unless:
1. You wrote the app yourself and have forced the 888 mode.
2. You compressed the resources (bitmaps etc) yourself and know that they should be perfect while also doing point 1.
(NOTE: you cant just use a browser or image viewer to look at an image and say well that shouldn't look like that without thinking about all of the above!)
Ok so how do we look at these things?
Well 1st off, I'm doing an nice app with a theme framework that uses lots of bitmaps for the default theme, so I put in the ability to change from 16 to 24 colour modes, so I can allow users to pick from SPEED or LOOK preference! This shows how both the SGS2 and TAB7 can have banding on a drop shadow, or not:
View example (View the 720p)
Sorry about audio, couldn't be arsed setting up a proper studio mic!
Also sorry about the blur box I HAD to use
http://www.youtube.com/watch?v=8QlnuoNSdXo
OK so a few other tests on your own device
Test 1. UPDATED
Using the attached bandingTestUPDATED
Ok altered this little thing to show 2 photos I took, one of mighty mugs Prime!!! and one of a robin! The app forces 888 mode and allows you to switch images with settings/menu button. It displays at 100% so you cant zoom out or in, you can just view as is. For comparison these are the images in use :
{
"lightbox_close": "Close",
"lightbox_next": "Next",
"lightbox_previous": "Previous",
"lightbox_error": "The requested content cannot be loaded. Please try again later.",
"lightbox_start_slideshow": "Start slideshow",
"lightbox_stop_slideshow": "Stop slideshow",
"lightbox_full_screen": "Full screen",
"lightbox_thumbnails": "Thumbnails",
"lightbox_download": "Download",
"lightbox_share": "Share",
"lightbox_zoom": "Zoom",
"lightbox_new_window": "New window",
"lightbox_toggle_sidebar": "Toggle sidebar"
}
Test 2.
Using the attached xda-gradtest
This is an app that is set to 888 and uses procedural gradients rather than bitmaps (as in the gradient is program generated rather than image based).
What you should see is only very slight banding in low greens due to our eye being very very very good at green colours compared with blue and red. There should be little or no banding on anything else.
More Info / Conclusion:
Well the gradientTest app is the best thing to look at, and the real test, the reason we see more banding on low green is 2 reasons.
The first:
Well we all see sh*t loads more green than any other colour (cause were ace) I recommend you look into human eye perception theory regarding both colour and detail perception as I have had to do over my many years in game console art development (wicked reading ).
Second:
I believe oled screens are not as good as others at low intensity low contrast due to the nature of how colour is processed.
I have many android devices ranging from the crappiest tablets you can buy of ebay, up to the best and even have iphone ipads also. I must say that with a finite gradient in 565 on the crap tablets and lesser displays, it looks better cause they are actually crap (dithered and filter to hell)
The same is true of this display I'm typing on now compared to another I have on my mac pro. One is an IPS pro colour variant of an LCD panel and one is not. Crap looks better on the lesser monitor! But Amazing looks amazing on the IPS pro panel that I HAVE to use for my 3D Graphics, Photography and Video work.
more..
If you plan to use apps that are set to 565, you have to deal with the banding or get a lesser display that just doesn't show it!
If you plan to use lots of apps (24bit)(888) that use low contrast dark green to black transition graphics, you will have to deal with the gradient banding
Alternatively
You could wait till the average target device has a minimum spec like the sgs2 and also a min OS of 2.3.* then probably most apps will have higher colour set and higher fidelity resources (bitmaps etc) in use But as it stands the mass market is much lower spec and the dominant os version is a mix of 2.1 and 2.2 devices
New info
previous to some 2.2 and all 2.1 android os defaulted to low colour if a developer didn't set it. Now in 2.3+ it defaults to high colour if they dont set it.
UPDATE 14 June
As some have mentioned (godutch etc) dnie (Digital Natural Image engine) by samsung is a colour/image processor that could be in use. Having looked at test 1 with the images, there is hardly any banding at all, but just a tiny bit I can see in primes left window. With this in mind and only mildly pissing me off, started to look at ROM and found many different " mdnie_profiles " that are apparently used and have different settings in each profile relating to all the major visual aspects (video, gallery blaaa blaaa)
So gonna have a play (these are in /etc/mdnie_* ) but I dont reccomend ne1 doing this unless you really know what your doing.
SO....
Hope this helps kill lots of thread activity on the same subject across multiple threads where info is getting hard to find and peeps just cant read all of those posts.
As always due to who I am I will say that I could be in part or on a whole wrong on this to any degree, but I believe this info to be correct as of the time of this post and this is only for the purpose of putting a few peoples minds at ease and also as information that doesn't sit 50 posts into some of these massive threads

Wow! I'm not a techie person like you but the way you explained it I kinda get the idea.. I'm very thankful for people like you who share their knowledge to educate us so we can come up with a decision whether to buy sgs2 or not. I'm looking forward to upgrade my Samsung i8910hd to sgs2 come July, and I'm researching in the forums to check the users' feedback as to their personal experience with their new sgs2.

As said above, I'm not a techie (Not as much as the OP anyway ) though am also grateful for people who post up tech info like this.
To the 2nd poster.... Ignore negative comments given by a lot of users, regardless of whatever bugs may be present, the S2 is an amazing phone and you will not be disappointed!
People are too quick too moan, yet don't talk about the plus sides

Thank you for the time and energy you put in to explaining this. It's sometimes hard to participate in certain technical conversations/threads because there are so many moving parts and so many different theories. This thread is refreshing.

But there's still very noticeable banding on 888. Less than 565 but there still is. So the banding problem really exists.
Sent from my GT-I9100 using XDA App

EleCtrOx666 said:
But there's still very noticeable banding on 888. Less than 565 but there still is. So the banding problem really exists.
Sent from my GT-I9100 using XDA App
Click to expand...
Click to collapse
Read the post and instructions fully, along with expected results!! Cause if your talking about angry birds bg, then I explained that! So no1 knows what your on about unless your precise. I've yet to find a problem with anyones display in this manner, thats not to say there may not be a first, but you have to be clear and read properly, then I would look to do some proper display test apps.

deanwray said:
Read the post and instructions fully, along with expected results!! Cause if your talking about angry birds bg, then I explained that! So no1 knows what your on about unless your precise. I've yet to find a problem with anyones display in this manner, thats not to say there may not be a first, but you have to be clear and read properly, then I would look to do some proper display test apps.
Click to expand...
Click to collapse
I read everything. With Xda Gradtest the green has the banding issue, so yes maybe our eyes are more sensible to it, but that doesn't excuse it & the problem exists, the green banding on a larger scale can be very noticeable.
Sent from my GT-I9100 using XDA App

Well my samsung galaxy tab had the same problem with gradients and it just had a simple lcd display. So I believe the problem lays with samsung as no other device I owned had that issue.
Sent from my GT-I9100 using Tapatalk

I don't know see any banding on my htc desire though, and the gradients look super smooth on it.

godutch said:
I don't know see any banding on my htc desire though, and the gradients look super smooth on it.
Click to expand...
Click to collapse
Cause it dosent have a high colour high detail display like amoled plus, on the galaxy s 2, which is what this thread is for
Sent from my GT-P1000 using XDA Premium App

Thank you deanwray for your work and explanation.
Discussion apart ... what can be done in the firmware (by Samsung) to correct this problem with the actual 16bit "low quality" apps and OS? the OS can be improved, only depends on Samsung, but will we have to wait for the apps developers to give us better IQ in their future releases?
Thanks again!

jvidia said:
Thank you deanwray for your work and explanation.
Discussion apart ... what can be done in the firmware (by Samsung) to correct this problem with the actual 16bit "low quality" apps and OS? the OS can be improved, only depends on Samsung, but will we have to wait for the apps developers to give us better IQ in their future releases?
Thanks again!
Click to expand...
Click to collapse
Well the os supports full 24bit colour with another 8bit for various non-palletized blending modes. Thats just Android, but most of the base functions you see in android are indeed independent apps like phone, calendar, contacts etc.
So the OS is fine.
As for applications, to the best of my knowledge, you cannot force an app to be 24bit mode, but even if you did, as the test app shows with angry birds bg, the source resources (images, textures etc) have to be of a quality that fits.
So in short, nothing to OS, as for apps, ask devs to put more work into them to do different resource graphics and optional 24bit colour mode. 24bit switch is only in my apps cause I'm and artist If I were a full blown programmer I probably wouldn't bother Also the market figures say it would be quite a bit of work for a very very very small percentage of ppl

thanks we will have to await for developers to work better. At leat the apps included by Samsung should be 24 bits !
It's a crime not do do so in a device like S2.
A little off-topic ... as a developer I am I'm currious ... you developed those 2 apps in what language? .net + Android SDK, Basic4Android, ... ?

jvidia said:
thanks we will have to await for developers to work better. At leat the apps included by Samsung should be 24 bits ! It's a crime not do do so in a device like S2.
A little off-topic ... as a developer I am I'm currious ... you developed those 2 apps in what language? .net + Android SDK, Basic4Android, ... ?
Click to expand...
Click to collapse
the two sh*tty test apps are about 20 lines of java using android sdk
The app in the video is a big combo (mess) of everything

I don't get why you're saying that banding doesn't occurs in 24-bit mode if it does occur ?! (talking in general)

EleCtrOx666 said:
I don't get why you're saying that banding doesn't occurs in 24-bit mode if it does occur ?!
Click to expand...
Click to collapse
it does only on low luminance green, but tbh, it's on every display depending on how subjective you are. But the horrid banding ppl talk about mostly is not an issue if resources are good and app is set to 24bit.

deanwray said:
Cause it dosent have a high colour high detail display like amoled plus, on the galaxy s 2, which is what this thread is for
Sent from my GT-P1000 using XDA Premium App
Click to expand...
Click to collapse
It has (I have the slcd version) and gradients are super smooth, anyway something weird is going on, I already posted this earlier:
take a screenshot with home+power and look at the pic on your computer ->banding
take a screenshot with qtadb and look at the pic on your computer -> no banding

godutch said:
It has (I have the slcd version) and gradients are super smooth, anyway something weird is going on, I already posted this earlier:
take a screenshot with home+power and look at the pic on your computer ->banding
take a screenshot with qtadb and look at the pic on your computer -> no banding
Click to expand...
Click to collapse
..and where did you find a S-LCD version of GS II?

I was talking about my desire

a couple of points. the nexus one and other amoled phones all had horrible banding for the last year, till the 2.3.3 update, and now the banding is gone completely. for example the XDA tapatalk app splash screen had banding. once 2.3.3 came out, the xda tapatalk app banding was gone. the app did not change from RGB565 to RGB888, the OS itself was updated with "something" which we arent clear on.
now considering the super amoled plus display has MORE sub pixels than the amoled with pentile sub pixel arrangement, it would be easy to think that banding should be even less on the plus version since there are more pixels for the same resolution.
anyway it still doesnt fully explain why angry birds on a nexus one, or any other phone, doesnt show the banding. but it DOES show banding on the SGS2. its the same app version. also considering the nexus one WAS seeing banding on these apps, but since 2.3.3 update, that banding is now gone, it makes me highly inclined to say this is a samsung software issue.
for fun i installed the test apks on n1, no banding on minimum brightness on RGB_888 on either apk. of course it was there on angry birds background RGB_565, but playing the app itself does NOT show the banding (only thanks to the android 2.3.3 update).

[SETTINGS & QUESTION] CM Color tuning, post question and settings here

Ok, i started this thread to discuss about new CM9 feature: the color tuning
The feature, with build 14, has become mature and then here we can share our best settings
Remeber that screens aren't all the same so colors can varie from phone to phone, but generally there aren't much difference
Please use this thread only for CM color question
The general cm9 thread is here
All other question will be ignored
so far i'm using
Red 0.917
Green 1
Blue 0.944
red gamma 11
green gamma 12
blue gamma 11
Setting must be with this format
Red
Green
Blue
Red gamma
Green gamma
Blue gamma
but i'm not 100% satisfied, so i'm working to get better possible

hi there...before i start fiddling with it..can u help me understand what each slider do?
Also..right now the CM colors are perfect but there is a lot of noise in darker pictures how can i correct it without making the overall picture yellowish?
thanks!
currently using
.591
.591
.591
7
5
5

First slider's series concern rgb adjustement, the second change the gamma of each color
I'm trying to understand how it works properly
With these adjustment you can mix red,green and blu and try to have best looking possible color
If you set all color t same setting would be few useless, we must try differents level to have acceptable black and white, which are the extreme opposite colors
Maybe someone can help faster than me

As I wrote in the CM9 General thread, your settings look amazing erto90.
I tried messing around myself but I don't have the eye for this stuff.

Andeby said:
As I wrote in the CM9 General thread, your settings look amazing erto90.
I tried messing around myself but I don't have the eye for this stuff.
Click to expand...
Click to collapse
Ok thanks, but i opened the thread to share our settings
I've reached my settings after 15m of trying but i think we can do better!
So, guys, share best settings you can!

So messing around again with this, I just put gamma to 20 on all colors, using the color settings in OP, and I am really liking it.
Edit:
Red gamma 11
Green gamma 15
Blue gamma 11
Looks good too.
All at 20 became a bit weird after using it for a while.

My settings with balanced white and black:
0.868
0.632
0.688
3
6
5
Not perfect but looks for me realy good.

This is my settings, were made by a photographer friend of mine...
0.5
0.438
0.581
-14
-10
-7

My settings for yellow tinted screens such as mine.
0.680
0.573
0.884
-16
-20
-17
That's made to avoid the green bug at minimum darkness and to try to keep acceptable dark greys.
Sure it's still quite saturated but anything with more gamma turn the grey too bright...
Though I have to say it's better than Voodoo hack, perhaps because the MDNIE are disabled (they lighten the greys and turn them red on Samsung roms).

spakkkk said:
This is my settings, were made by a photographer friend of mine...
0.5
0.438
0.581
-14
-10
-7
Click to expand...
Click to collapse
this setting is good! thanks man

spakkkk said:
This is my settings, were made by a photographer friend of mine...
0.5
0.438
0.581
-14
-10
-7
Click to expand...
Click to collapse
Just wanted to say thanks for sharing these settings, they look great!

i have new settings.
they are really better but when the brightness is low they look a little bit greenish, maybe kernel issue.
0.231
0.231
0.280
-14
-16
-10

My settings:
0,500
0,438
0,581
-9
-9
-0
btw. can someone tell me what is mDNIe Mode??
(it says it´s display post-processing) ..is anyone using it?? ..and what mode do you use?

sokre988 said:
My settings:
btw. can someone tell me what is mDNIe Mode??
(it says it´s display post-processing) ..is anyone using it?? ..and what mode do you use?
Click to expand...
Click to collapse
It's a kind of filter that boosts particular colours, quite like digital vibrance on your PC video card.
I don't like this, it gives more banding and tint in the dark greys.

Tatsuya79 said:
It's a kind of filter that boosts particular colours, quite like digital vibrance on your PC video card.
I don't like this, it gives more banding and tint in the dark greys.
Click to expand...
Click to collapse
Thanks, I´ve tried all 4 modes, and the best one is UI mode ..I´ll see how it looks on games, movies, pics etc..

spakkkk said:
i have new settings.
they are really better but when the brightness is low they look a little bit greenish, maybe kernel issue.
0.231
0.231
0.280
-14
-16
-10
Click to expand...
Click to collapse
Yeah they look just as good, but unfortunately I run at low brightness more often that not and the green tint is a deal breaker. Gonna play with it and see if I can eliminate or at least reduce it. Thanks again.

My settings are...
1,000
1,000
1,000
-14
-12
-11

erto90 said:
Ok, i started this thread to discuss about new CM9 feature: the color tuning
The feature, with build 14, has become mature and then here we can share our best settings
Remeber that screens aren't all the same so colors can varie from phone to phone, but generally there aren't much difference
Please use this thread only for CM color question
The general cm9 thread is here
All other question will be ignored
so far i'm using
Red 0.917
Green 1
Blue 0.944
red gamma 11
green gamma 12
blue gamma 11
Setting must be with this format
Red
Green
Blue
Red gamma
Green gamma
Blue gamma
but i'm not 100% satisfied, so i'm working to get better possible
Click to expand...
Click to collapse
perfect for me

just would like to share my settings
(because I love voodoo color, so, my setting is nearly the same with voodoo color)
great color, great red, great green, great blue.
Red 0.874
Green 0.874
Blue 0.949
Reg Gamma -15
Green Gamma -15
BLue Gamma -18
if you have suggestion, you can tell me..
have a nice day with great color.. ^^

.860
.868
.1
20
20
18
I used voodoo color back at gingerbread and this settings are pretty close to me..
Give this settings a try.
Sent from my GT-I9000 using XDA

CM7/CNA/CM10/AOKP/PA Custom Light Sensor Levels [Updated 09/01/12]

***** 09/01/2012 Epinter CM10 light levels can be customized on 09/01/2012 build.
**** 08/31/2012 Works with Jokersax CM10
*** 08/25/2012. Added brighter levels. Auto brightness levels can be edited on CM7, CNA JB builds, maybe some others. Check your display options.
** Added alternative levels. Changed Decrease Hysteresis to 0 % overlap to allow the screen to dim down to the lowest value.
*These settings cannot be changed on Neutrino ROM.
Here are my current Light Sensor Settings. I am experiencing smooth levels transitions and it is also easy on your eyes when using your phone in the dark.
Refer to the attached screen shot for quick reference. I set my Number of Levels to 49 and follow the pattern of + 5 screen brightness for every 100 sensor level. Follow the pattern up to 255 screen brightness.
{
"lightbox_close": "Close",
"lightbox_next": "Next",
"lightbox_previous": "Previous",
"lightbox_error": "The requested content cannot be loaded. Please try again later.",
"lightbox_start_slideshow": "Start slideshow",
"lightbox_stop_slideshow": "Stop slideshow",
"lightbox_full_screen": "Full screen",
"lightbox_thumbnails": "Thumbnails",
"lightbox_download": "Download",
"lightbox_share": "Share",
"lightbox_zoom": "Zoom",
"lightbox_new_window": "New window",
"lightbox_toggle_sidebar": "Toggle sidebar"
}
Window Length is set to 20 sec, Sample Interval to 1 Sec with Reset Threshold Disabled. I use Custom Screen Dim Level set to 1 and Light Decrease Hysteresis to 0%.
Tip: Some people find the final screen level of 255 unnecessary and they keep 230 as their highest brightness value. I set it all the way to the max because I hate not being able to see my screen in the sun. Lower final value has a potential to improve your battery life.
---------------------
Here are some alternative levels if you feel you want the screen to be a little brighter.
Again, follow the pattern of +5 screen brightness for every 50 sensor level.
-----------------------
08/25/2012
Try these levels if you still find the previous levels too dim.
+5 Screen steps still remain. Number of levels are 49.
Sensor levels are +25 at every step. Follow the pattern shown on screen shot all the way to screen level 255.
Button brightness is really not needed after a certain screen (50?) level because you would be able to see them in broad daylight/ bright room.
Note: I updated the setting for Decrease Hysteresis to 0% overlap to allow the screen to dim down to 1 when using your phone in the dark.
Hit the thanks button if you find this useful!

Sorry, where to find these settings?
Special app?

No, cm7 settings, display, auto brightness edit other levels. Let me know if I was not clear enough.
Sent from my MB860 CM7 olympus always latest nightly 37p Radio.

ah ok, thats what I tried, but com.cyanogenmod.cmparts crushed, so I cant get to this seetings... I'm on the neutrino rom
too bad, like to try it!
thanks for the advice

muhski said:
ah ok, thats what I tried, but com.cyanogenmod.cmparts crushed, so I cant get to this seetings... I'm on the neutrino rom
too bad, like to try it!
thanks for the advice
Click to expand...
Click to collapse
Ahh, I didn't know these settings were not available on Neutrino.
Sent from my MB860 CM7 olympus always latest nightly 37p Radio.

I'm trying something similar on jokers cm9 now to see what kinda battery boost I can get. thanks for the heads up!
Sent from my MB860 using XDA

aaron.a said:
I'm trying something similar on jokers cm9 now to see what kinda battery boost I can get. thanks for the heads up!
Sent from my MB860 using XDA
Click to expand...
Click to collapse
No problem, I'm just giving back to this great community. Tip: Some people find the final screen level of 255 unnecessary and they keep 230 as their highest brightness value. I set it all the way to the max because I hate not being able to see my screen in the sun. Lower final value has a potential to improve your battery life.
Sent from my MB860 CM7 olympus always latest nightly 37p Radio.

This topic helped me once but i formatted my phone and wanted to set my light sensor again coz it was work great for me, but now your screen shots link is dead. Can you re upload please ? I really appreciate it.
Sorry for bad english

I would just like to share that I am also interested. I have finally decided to return to CM7. Although I loved MIUI V4, I eventually realized that I could get exactly what I wanted from a ROM more easily in CM7 right now. So anything that helps battery is much appreciated. On MIUI V4 I was able to consistently get about a day and a half of battery life with 5 hours of screen time and WIFI on
Sent from my MB860 using Tapatalk 2

Follow the pattern up to 255 screen
Sent from my MB860 CM7 latest nightly 37p Radio

I've been using your settings for weeks, and I haven't noticed anything different in battery life.
However, I did find it really strong at always maintaining a near perfect level of brightness, especially outdoors.

Soldier-2Point0 said:
Follow the pattern up to 255 screen
Sent from my MB860 CM7 latest nightly 37p Radio
Click to expand...
Click to collapse
Thank you very much.

Cryingmoose said:
I've been using your settings for weeks, and I haven't noticed anything different in battery life.
However, I did find it really strong at always maintaining a near perfect level of brightness, especially outdoors.
Click to expand...
Click to collapse
Near perfect levels can be pretty useful.
I haven't applied these just yet (but I am about to) but what I found when I was getting great life on MIUI is that keeping it on the lowest possible comfortable setting (as opposed to auto brightness) makes a world of difference.
If I spend the day in my house, my brightness stays on the lowest setting for that full amount of time, so I get an increase by not using autobrightness. With auto, it would change if one room was brighter than another.
I guess it's your mileage may vary
EDIT: I realized this post doesn't make much sense and is mostly rambling. So long story short, these settings will only make a decent impact while using autobrightness IF you are primarily at the lower levels of lighting

Hope these levels are doing people good. I have been on these levels for almost three months now.
Sent from my MB860 on CM7

I added an alternative to make the display a little brighter.
MB860, CM7.2.0, Faux 026b1 1Ghz

Is there a way to make the brightness lower than 0. For me, a brightness of 0 is still too bright at night and would like to decrease it even more.

Atrix_Owner said:
Is there a way to make the brightness lower than 0. For me, a brightness of 0 is still too bright at night and would like to decrease it even more.
Click to expand...
Click to collapse
That would be going beyond what is readily available on the settings. Maybe someone else can help out?
MB860, CM7.2.0, Faux 026b1 1Ghz

I have to use an app called screen filter to make it even darker than 0. I thought there was someway to make it darker within cm.

Atrix_Owner said:
Is there a way to make the brightness lower than 0. For me, a brightness of 0 is still too bright at night and would like to decrease it even more.
Click to expand...
Click to collapse
Here is what you are looking for
https://play.google.com/store/apps/details?id=com.haxor&feature

Zeljko1234 said:
Here is what you are looking for
https://play.google.com/store/apps/details?id=com.haxor&feature
Click to expand...
Click to collapse
That's overkill, plus defeats the purpose of using the automatic brightness sensor. I rather have a one time setup and forget. I'm sure someone will still find it suitable for their needs.
MB860, CM7.2.0, Faux 026b1 1Ghz

Gpad screen gamma is too low

Some of you may have noticed it's difficult to watch dark scenes in movies on the gpad. I think the problem is the gamma calibration, you can see it clearly on the pictures I took.
https://imageshack.com/i/nf96iaj
On the top you can see my nexus 7 2013, you can differentiate all the shades of grey from 1% white to 100%.
On the gpad, everything is solid black from 1% to 12% of white.
You can find the original image here : http://imageshack.us/f/594/6291.png/
How low can you go, on your gpad, before the grey melts with the black ?
Do you know an app to apply gamma correction ?
Here you can see the same picture on the N7 and the gpad. You can't even distinguish the guy's ear on the g pad.
https://imageshack.com/i/f563trj

bobo69 said:
Some of you may have noticed it's difficult to watch dark scenes in movies on the gpad. I think the problem is the gamma calibration, you can see it clearly on the pictures I took.
https://imageshack.com/i/nf96iaj
On the top you can see my nexus 7 2013, you can differentiate all the shades of grey from 1% white to 100%.
On the gpad, everything is solid black from 1% to 12% of white.
You can find the original image here : http://imageshack.us/f/594/6291.png/
How low can you go, on your gpad, before the grey melts with the black ?
Do you know an app to apply gamma correction ?
Here you can see the same picture on the N7 and the gpad. You can't even distinguish the guy's ear on the g pad.
https://imageshack.com/i/f563trj
Click to expand...
Click to collapse
I see the difference, and I knew it was there already also.. I'm sorry, but apparently gamma is not something that is doable. - I was looking to link you the app from market called "Screen Adjuster", however you want to look at this description, especially the last sentence. ;/
- dimming the screen 15-100% (below minimum system brightness)
- screen color and a contrast adjustment
- system brightness 0-100% adjustment
- functional widget (on/off, system brightness, settings)
- autorun option
Some phones have a color tint screen. This app have a possibility to try to improve colors on this kind of the screen by setting an additional factor RGB.*
The range of the dimmer is from 15% to 100% (it allows to dim the screen below a min system brightness value). Make a relief for your eyes during a nightly reading.
Furthermore, you can change fast the system brightness too.
The additional contrast factor can try to make the reading or a picture viewing more comfortable on some screens.*
The widget provides fast on/off service with a shortcuts to the Adjuster settings and the system brightness settings.
The application has the autorun option which works with the dimmer set above 22% (for the safety).
Note
A gamma adjustment is not possible to do.
You can of course try and download the app anyways and see if contrast or brightness will do anything for ya.
- In case you do download the app, remember that setting contrast low will result in problems with installing apps, as in you cannot hit Install, only cancel. To avoid this, open up Screen Adjuster and turn it off, install the app and turn it back on afterwards. It's something about lowering the settings to lower than what is "intended", I don't quite understand it and I find it rather odd. But it let's you install apps.. So I guess hooray.
That's all I got.

CuraeL said:
I see the difference, and I knew it was there already also.. I'm sorry, but apparently gamma is not something that is doable. - I was looking to link you the app from market called "Screen Adjuster", however you want to look at this description, especially the last sentence. ;/
That's all I got.
Click to expand...
Click to collapse
Thank you for your response, but I'm already using screen adjuster. I set the contrast at -25 and it helps a lot to see dark details.
Unfortunately, it has two side effects :
- it brightens the dark shades of grey, but also the black levels.
- I noticed that the contrast setting also affects the white making it look like light grey.
So the contrast setting in screen adjuster doesn't affects only the dark tones like it would on a monitor or a tv, it affects the contrast ratio.
I've found apps to make gamma adustment but it only works on some devices with custom kernel.
https://play.google.com/store/apps/details?id=com.teamkang.fauxclock&hl=fr
- Gamma curve (Galaxy Nexus, Nexus 4, HTC One, Nexus 7 2013)

bobo69 said:
Thank you for your response, but I'm already using screen adjuster. I set the contrast at -25 and it helps a lot to see dark details.
Unfortunately, it has two side effects :
- it brightens the dark shades of grey, but also the black levels.
- I noticed that the contrast setting also affects the white making it look like light grey.
So the contrast setting in screen adjuster doesn't affects only the dark tones like it would on a monitor or a tv, it affects the contrast ratio.
I've found apps to make gamma adustment but it only works on some devices with custom kernel.
https://play.google.com/store/apps/details?id=com.teamkang.fauxclock&hl=fr
- Gamma curve (Galaxy Nexus, Nexus 4, HTC One, Nexus 7 2013)
Click to expand...
Click to collapse
Yea, I was about to say that gamma can be done but only on custom kernels. Lot of Nexus 5 stuff on the market. Apparently it's Google who locked the gamma settings completely down but only in 4.4.2. I guess it may work on stock LG Kernel since it's only 4.2.2? I'm afraid we'll have to wait for some kernel support for other roms. That would be awesome. I really hope for some Franco-kernel-glory on this device.

That's what I thought, we need to wait for custom kernels...I hope it will come soon, because it's so frustrating to have such a good screen with bad calibration !
People tends to complain too much about the warm white balance but the gamma calibration is far more concerning.

bobo69 said:
That's what I thought, we need to wait for custom kernels...I hope it will come soon, because it's so frustrating to have such a good screen with bad calibration !
People tends to complain too much about the warm white balance but the gamma calibration is far more concerning.
Click to expand...
Click to collapse
I hope @dalingrin can cook something up to address both. He said he was going to work on something.

joshuadjohnson22 said:
I hope @dalingrin can cook something up to address both. He said he was going to work on something.
Click to expand...
Click to collapse
Yes it would be great if he did , though he's done so much for us already.
Sent from my LG-V500 using XDA Premium 4 mobile app

I see someone had developed a nude kernel for our devices. I welder off they can add support for gamma adjustment
Sent from my LG-V500 using Tapatalk

I am pleased to say my new kernel BOB Kernel v2 has had the gamma corrected

My first post ever
YoungBobbie said:
I am pleased to say my new kernel BOB Kernel v2 has had the gamma corrected
Click to expand...
Click to collapse
Hi there Young Bobbie, I am new to posting on XDA so I couldn't post this in your kernel developer page. This is my first post on any forum page ever. First off, thank you very much for your hard work to make this kernel happen to correct gamma on the v500. I have been sitting on the fence whether to get the gpad, and if i would get the v500 or the v510. Was leaning toward the v510 because of Sleekmason's wonderful kernel work, but it's exciting that we have now have the same options available for the v500. I noticed this was working fully with the Malladus ROM. My question to you was whether or not this worked with stock LG ROM as well? Thank you again YoungBobbie and Sleekmason for your time and creations.
Sorry, just answered my own question. Guess it helps to read the very first line of the page (making fun of myself now ;-P) Thank you again YoungBobbie and sleekmason!!!

themorningwolf said:
Hi there Young Bobbie, I am new to posting on XDA so I couldn't post this in your kernel developer page. This is my first post on any forum page ever. First off, thank you very much for your hard work to make this kernel happen to correct gamma on the v500. I have been sitting on the fence whether to get the gpad, and if i would get the v500 or the v510. Was leaning toward the v510 because of Sleekmason's wonderful kernel work, but it's exciting that we have now have the same options available for the v500. I noticed this was working fully with the Malladus ROM. My question to you was whether or not this worked with stock LG ROM as well? Thank you again YoungBobbie and Sleekmason for your time and creations.
Sorry, just answered my own question. Guess it helps to read the very first line of the page (making fun of myself now ;-P) Thank you again YoungBobbie and sleekmason!!!
Click to expand...
Click to collapse
Gald to have helped would you be willing to try the kernel for the stock LG ROM?

Please take a look at the images below and compare
The tablet on the right is running my kernel and the left stock
You can see the differences on the first image as the deepness of the blacks
and on the second the highlights on the white

I just about to get this tablet, then i so this problem... ?
Sent from Note 3 Superphone!

Bob2702 said:
Gald to have helped would you be willing to try the kernel for the stock LG ROM?
Click to expand...
Click to collapse
Be happy to. Have to acquire the device first, which will be in a matter of a week or 2

OnePlus 8 Pro display far too bright at night time

Hi everyone,
Is there a setting to make the OnePlus display less glaringly bright at night? I've never had a display that is so intense even on the lowest setting. It almost seems like a fault, as surely people don't want their screen this bright when they're in bed? I feel like a screen should be super bright or super dim depending on your needs.
Weirdly it seems brighter than it was before the last update with May security, although I'd only had it for one day at that point.

leoni1980 said:
Hi everyone,
Is there a setting to make the OnePlus display less glaringly bright at night? I've never had a display that is so intense even on the lowest setting. It almost seems like a fault, as surely people don't want their screen this bright when they're in bed? I feel like a screen should be super bright or super dim depending on your needs.
Weirdly it seems brighter than it was before the last update with May security, although I'd only had it for one day at that point.
Click to expand...
Click to collapse
They've made it brighter intentional to try eliminate screen issues on low brightness..

I bought this phone partly for this reason, i don´t want my screen to be extreme dark at night but i also don´t want to disable auto brightness, so this behavior is a win for me.
Just wanted to share my opinion on that matter.

Or you can flash a custom kernel, like CleanSlate, which provides a way to finely tune the minimum brightness. This way, you can specify you want your screen to be able to go even under the minimum brightness set by OnePlus, and this at specific hours only (at night, for example) if you wish.

Yep, the increased brightness is to cover up the screen issues.

Surfeur-des-Reves said:
Or you can flash a custom kernel, like CleanSlate, which provides a way to finely tune the minimum brightness. This way, you can specify you want your screen to be able to go even under the minimum brightness set by OnePlus, and this at specific hours only (at night, for example) if you wish.
Click to expand...
Click to collapse
Not really much of a fix for someone like me who no longer roots or flashes. I run work software and banking software on my phone so I can't be flippant with what I use.

cultofluna said:
They've made it brighter intentional to try eliminate screen issues on low brightness..
Click to expand...
Click to collapse
Not really eliminating the issue if it's merely trying to hide it. All of my other AMOLED phones over the past few years have been able to go to a much lower brightness without looking like crap, so I would expect a £900 device like this to have no compromises. The 'fix' (if that is what they're calling it) seems like more of a deceit to me.

arsenal74 said:
Yep, the increased brightness is to cover up the screen issues.
Click to expand...
Click to collapse
Given the image retention, the black crush and the pretty average camera I think it's time to send the device back then. It's otherwise a nice device but even after Amazon refunded 20% for me I still feel that £729 is too much for a device with screen flaws.
If they do a hardware fix I might buy it again, although the 8T will be out by then ?

leoni1980 said:
Not really much of a fix for someone like me who no longer roots or flashes. I run work software and banking software on my phone so I can't be flippant with what I use.
Click to expand...
Click to collapse
You do need to flash but don't need to root your device to use this kernel. Just check in the Kernel/Roms section and you'll find all the information you need in case you feel like solving your issue.
I use banking apps on my phone too and they're extremely sensitive to system alterations. Still, they work flawlessly on my rooted and 'kernelized' device, as I make sure to hide all traces of root for those apps thanks to Magisk Hide function and my phone also passes Safetynet.
Anyway, I hope you solve your issue, whatever solution you decide to go for.

Surfeur-des-Reves said:
You do need to flash but don't need to root your device to use this kernel. Just check in the Kernel/Roms section and you'll find all the information you need in case you feel like solving your issue.
I use banking apps on my phone too and they're extremely sensitive to system alterations. Still, they work flawlessly on my rooted and 'kernelized' device, as I make sure to hide all traces of root for those apps thanks to Magisk Hide function and my phone also passes Safetynet.
Anyway, I hope you solve your issue, whatever solution you decide to go for.
Click to expand...
Click to collapse
I don't want to sound ungrateful, so thank you for your advice. Even if this provided some kind of fix I would never wish to start flashing third party kernels on a phone costing this much - I would have done this 10 years ago but nowadays I believe a phone of this price should not require work on my part (beyond a software toggle) to make it suitable for my needs, so I will be returning it and looking elsewhere I think.
I appreciate your help and the input of others though, so thank you very much. I'm sure you're all happy with the device but I think it's just not for me.

You can download apps that decrease the minimum brightness below the standard without rooting but tbh, the display looks like green sh** below the min.
Sent from my IN2023 using Tapatalk

You may also be able to get a lower light level if you use the DC dimming option in the OnePlus Lab settings. At least on my phone, the lowest brightness levels appear somewhat dimmer when DC mode is switched on.

pnomandk said:
You may also be able to get a lower light level if you use the DC dimming option in the OnePlus Lab settings. At least on my phone, the lowest brightness levels appear somewhat dimmer when DC mode is switched on.
Click to expand...
Click to collapse
Thanks, I already had DC dimming on anyway, but toggling it on an off doesn't seem to make any difference to me.

I sometimes use Night mode...

I don't find it too bright it's actually dim for me which version are you in?

anadarco7 said:
I don't find it too bright it's actually dim for me which version are you in?
Click to expand...
Click to collapse
When I first got the phone in April it got very, very dim but after an update they raised the min brightness because the screen looks like hell with the brightness lower. My 7pro is much dimmer now in the dark.
Sent from my IN2023 using Tapatalk

People need to stop trying to fix the crack as it is bigger than the fix (Those who defend OnePlus indirectly)!!
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There is 0 exuces for expensive devices to have such issues. OnePlus has a major quality control problem.

I know OP was looking at non root, non custom kernel solutions, but I did some digging and found that
/sys/devices/platform/soc/ae00000.qcom,mdss_mdp/backlight/panel0-backlight/brightness
Would be set to minimum of any potential being 45 (for me). I can lower this, thus lowering brightness below the minimum which is desirable, but I want to incorporate a bit easier control via auto brightness. There is a setting listed for max brightness here, but not inherently what I wanted, I want minimum brightness, and have auto brightness go between min and max..

I use Dimly. Problem solved.