Database Users

[Q] Color calibration?

Hi!
I've noticed that my screen has (okay) color.
I've also noticed that it is possible to calibrate them.
I've tried this through franco.kernel updater and YES, the color has improved.
Now, which calibration settings and procedure would you recommend for the best results?
A different kernel or app perhaps? Specific color profiles, maybe?
Thanks!

Franco has an app in the Play store for our devices. Nexus 4 Display Control

bg1906 said:
Franco has an app in the Play store for our devices. Nexus 4 Display Control
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The options here are identical to those offered by his kernel updater app.
I want to know which color settings profiles offer the best results.
Which ones do you use?

arvindch said:
the options here are identical to those offered by his kernel updater app.
I want to know which color settings profiles offer the best results.
Which ones do you use?
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238
228
240

bg1906 said:
238
228
240
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Those are RGB values, right?
And, gamma settings?
Thanks!

arvindch said:
Those are RGB values, right?
And, gamma settings?
Thanks!
Click to expand...
Click to collapse
RGB
Gamma can't be modified on the stock kernel which is what I run. However, Franco allows you to adjust gamma with a custom kernel, however I don't know the settings.

bg1906 said:
RGB
Gamma can't be modified on the stock kernel which is what I run. However, Franco allows you to adjust gamma with a custom kernel, however I don't know the settings.
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Yeah, I'm running franco's kernel + prima drivers.
Thanks for the RGB values. I'll try them out.
Also, anyone running franco.kernel is welcome to post their preferred RGB+gamma values.
Thanks!

The Franco kernel app comes with a big set of gamma profiles submitted by users. You need to press a button in the app to be able to see those though.
I suggest trying those to see if there's something you like.
Sent from my Nexus 4

steviewevie said:
The Franco kernel app comes with a big set of gamma profiles submitted by users. You need to press a button in the app to be able to see those though.
I suggest trying those to see if there's something you like.
Sent from my Nexus 4
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Yeah, I tried a few of those. But, it's hard to compare the differences.

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.
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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.
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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
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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?
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Click to collapse
Be happy to. Have to acquire the device first, which will be in a matter of a week or 2

Screen too bright even on lowest brightness

Hello, I have recently purchased Moto G4 Play and I find the display of it too bright even on the lowest settings.
I used to read news and ebooks at bedtime but it is very stressful with this level of brightness.
I have tried 'Screen Filter' app and it slows down the mobile plus the actual brightness is not reduced.
I will root my device if it is going to help me with this brightness issue.
What would you recommend? My device is still in the 10 day window for return from Amazon.
Thanks.

Not sure about stock but the brightness goes pretty low on the XOSP rom I'm using right now.
Because you mentioned you use it for reading, I would recommend Twilight or f.lux(both available on playstore f.lux needing root).
They really help with the screen saturation and make it easier on your eyes.
I tried screen filter and it worked perfectly. Maybe it has something to do with the stock rom.
An alternate to screen filter would be Lux Lite it worked as good as screen filter maybe this works in your case.

Thanks for quick reply
MaanasDwivedi said:
Not sure about stock but the brightness goes pretty low on the XOSP rom I'm using right now.
Because you mentioned you use it for reading, I would recommend Twilight or f.lux(both available on playstore f.lux needing root).
They really help with the screen saturation and make it easier on your eyes.
I tried screen filter and it worked perfectly. Maybe it has something to do with the stock rom.
An alternate to screen filter would be Lux Lite it worked as good as screen filter maybe this works in your case.
Click to expand...
Click to collapse
Thank you for quick reply.
I am already using Twilight : ), I am little scared about rooting this brand new mobile due to warranty issues. Just for comparison,
the lowest brightness on Moto G4 Play is like Middle for Moto G3 / E3.
Can I claim warranty after rooting this device?

manasn said:
Thank you for quick reply.
I am already using Twilight : ), I am little scared about rooting this brand new mobile due to warranty issues. Just for comparison,
the lowest brightness on Moto G4 Play is like Middle for Moto G3 / E3.
Can I claim warranty after rooting this device?
Click to expand...
Click to collapse
It says on the bootloader unlock page that you cannot once the bootloader is unlocked. So you can't claim the warranty after rooting. But mostly they don't bother letting you claim it on some hardware problems but you should still think of it as void and not take any chances.

Twilight Pro is much enhanced that the free version. I'm using it since I bought this phone. It has "Bed Reading" profile which helps you read in the dark without letting you put stress on your eyes and help you sleep as soon as you leave your phone. According to me, just leave it on default settings and switch to Bed reading at night.

Thanks for reply
cy56 said:
Twilight Pro is much enhanced that the free version. I'm using it since I bought this phone. It has "Bed Reading" profile which helps you read in the dark without letting you put stress on your eyes and help you sleep as soon as you leave your phone. According to me, just leave it on default settings and switch to Bed reading at night.
Click to expand...
Click to collapse
Hi, thanks for reply! I've got 'Bed Reading' profile option too but I am using the twilight free version. Anyway, buying it for sure since it certainly helps me and so should the dev get helped.
I have no compelling reason to root this device except this brightness issue, and I am little worried about Nougat update too, feeling maybe Lenovo will roll back its promise.

When I downloaded it first, it asked me to buy for just ₹20 ($0.29) and there was no reason for denial

What about the adaptive brightness?
I had adaptive brightness set to true when I was facing such a problem. Now it works fine. You can check the Ambient Light sensor in GPS Status and Toolbox app.

If you have Xposed installed there are a couple of modules that can lower the minimum brightness

Thanks for reply
moshiach101 said:
If you have Xposed installed there are a couple of modules that can lower the minimum brightness
Click to expand...
Click to collapse
Thank you for reply, just one question.
Does this will reduce the brightness organically? Meaning no gimmick like 'Screen Filter' or anything?

manasn said:
Thank you for reply, just one question.
Does this will reduce the brightness organically? Meaning no gimmick like 'Screen Filter' or anything?
Click to expand...
Click to collapse
Screen filter puts an overlay over everything else, the backlight is still the same it just looks a little dimmer cause everything is a little greyer.
Xposed can lower the backlight
http://repo.xposed.info/module/com.smartmadsoft.xposed.aio

Lowers actual backlight
Sent from my Moto G4 Play using XDA Labs

Great find. Now the brightness is perfect for night reading, and it will also improve battery life.
I don't understand though why manufacturers limit the min brightness when it's "free", maybe to artificially segment the market (flagships always have excellent low brightness)... There are cheap chinese phones that have hardware backlight limits, but for G4 Play it's definitely not the case, it's just software limited.

nick_white said:
Great find. Now the brightness is perfect for night reading, and it will also improve battery life
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Click to collapse
GravityBox (xposed) can dim the "real" brigthness too...
Note that if the lcd brigthness set to minimum (GravityBox or AllMy....), Youtube videos cant be played in full screen.

rafaelrgi said:
Note that if the lcd brigthness set to minimum (GravityBox or AllMy....), Youtube videos cant be played in full screen.
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It works for me. But how does it manifest when it doesn't work?

nick_white said:
It works for me. But how does it manifest when it doesn't work?
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Click to collapse
- Using GravityBox or AllMy..., ser the minimun brightness to 1 (or even 2)
- Without adaptative brightness, set the brightness (slider) to minimum
- Go to Youtube, play a video and expand it to fullscreen
The screen becames totally black, but the video still playing (the audio still playing).
Note that if the brightness slider isn't at the true real minimun, everything works nicely.

I tried exactly that, but it works for me. I also use Youtube background playback Xposed module.

Any way to adjust the colour temp of the screen?

I was hoping this was a feature they would add in Oreo, but alas, they just added an extremely overly aggressive night mode that doesn't really let you adjust it enough.
My only real gripe with the phone is how insanely cool the screen is. It almost pains me to go from looking at something like the Pixel in SRGB mode, the S8, or even my LG V20 to then looking at the Essential screen.
I am currently using Screen Balance, which is ok, but it causes issues with some things because it's just an overlay(this is especially bad when casting if you forget to turn it off). Is there a way to manually adjust the temperature of the LCD?

Los 15.1 has it built in. Using latest build and adjusted blue down to 88. Working great.

gflexstump said:
Los 15.1 has it built in. Using latest build and adjusted blue down to 88. Working great.
Click to expand...
Click to collapse
Thanks!
Does it support the notch? Last time I used custom roms(about a month ago) none of them supported the notch and so stuff got cut off

Expanded desktop works search bar is in camera otherwise have had no issues.

there is sRGB mod in developpers settings

actupsp said:
there is sRGB mod in developpers settings
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sRGB doesn't work on the PH1

viper98 said:
sRGB doesn't work on the PH1
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Click to collapse
You need to install ElementalX kernel.
Then you can adjust to your heart's desire.

How to increase screen saturation on mi a1?

I use the made in China version. So I'm not sure which display this has. But I would like to have a bit vibrant vivid display. So is there any way to increase the screen saturation on mi a1 device? Please don't suggest any custom ROM and kennels. Thank you.

from whatever display you're using it's not possible to add vividness to the MiA1 screen.. it's somehow native that way, in times you'll get used to it.. well I did at least..
moving from Mi4i with MIUI interface it's possible to set an appropriate a comfortable saturation available
but for the moment being you might be able to get a vivid color (saturation) using a third party app (I never search for it though)

afridishamsofficial said:
I use the made in China version. So I'm not sure which display this has. But I would like to have a bit vibrant vivid display. So is there any way to increase the screen saturation on mi a1 device? Please don't suggest any custom ROM and kennels. Thank you.
Click to expand...
Click to collapse
Flash a custom kernel like void or franco kernel and adjust colors and saturation.

See this thread: https://forum.xda-developers.com/mi-a1/review/color-saturation-accuracy-t3679696

datasource said:
Flash a custom kernel like void or franco kernel and adjust colors and saturation.
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Thanks for your comment. But is it possible to flash Franco kernel without even rooting?

afridishamsofficial said:
Thanks for your comment. But is it possible to flash Franco kernel without even rooting?
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No. Sorry. I just misread your OP.