Database Users

[Q] Wallpaper - ugly banding in gradients

I've been searching, and have seen lots of threads about similar problems with the Evo and it's fairly low-color screen, but I was under the impression that the Droid X has a 24bit color screen so this shouldn't be an issue.
Anyway, I've got some wallpapers (cropped and resized for the Droix X from the originals at Ultralinx)
They look fantastic on the computer. They're the right dimensions. Tried saving as JPG and 24 bit PNG, but the outcome is the same. When I copy them to the phone and set them as wallpaper, the gradients don't look smooth; there is color banding all over the place.
I've got screenshots and originals up on the web, but can't link to them until my account is approved by a mod.
EDIT: Added attachments instead, but the forum super-compressing the images doesn't help their clarity at all.

Hey,
i've got the same problem.
That's not funny at all, I really don't know how to save it, that it looks like on my desktop pc!

4tticuz said:
Hey,
i've got the same problem.
That's not funny at all, I really don't know how to save it, that it looks like on my desktop pc!
Click to expand...
Click to collapse
Sorry to be off topic but I cant help but stare at your notification bar. What theme is it?

It's my own notificationbar.
Have to search the files first

It doesn't seem to be the screen. I dropped those images into my dropbox, and opened them in whatever viewer dropbox opened by default. The image was smooth as I zoomed in, until I zoomed in far enough to see a moire pattern. I also opened it in Astra's built in viewer; again there was no banding. However, when I set the image to be my wallpaper, I see the same banding you are seeing.
Bad news is, I don't know what the problem is; good news is it doesn't seem to be a screen limitation.

Thanks so far!
But what's the problem than?
I really have no idea :/

Ah ha! Google turned up this app: "Wallpaper Set and Save" (Sorry, can't post a link because I'm new, apparently. I attached an image of the QR code instead.)
It says it hasn't been updated for 2.x, but it worked fine on my droid x (running the stock rom with launcher pro.) Using it to set the exact same wallpaper, I now see no banding (although I did in the preview screen.) It's worth a try, although I'd still like to know what is causing this issue (since it obviously isn't a hardware issue.)
I attached a screen capture so you can see for yourself.
Edit: The forum's image compression adds some artifacts; it looks even smoother on my screen capture. Even here it's a big improvement over the others though!

Its probably the gallery app that is re-compressing the wallpaper and creating the bands

images in browser/apps displaying in low res

Hi
just got a galaxy s on tmobile in the UK.
It's good but it seems that lots of images in the browser and displaying in low res, they all look blocky.
It's happening in apps too - the thumbs of peoples faces in facebook are blurred/blocky, images from the engadget app are blocky etc.
I've compared to another galaxy S and the images on that look fine.
Would anyone have any idea whats causing it? thanks
Edit - It seems to be intermittent too. For example, if i do a google image search, the thumbs are sharp, but if I click on a pic and it goes into the slideshow view all the images are REALLY blocky. If I click the link to the original page were the image is coming from the image loads up fine.

It seems to be my carrier, tmobile.
When i put other sim cards in the phone it works fine.
Very annoying, makes buying a nice phone like this for web browsing kind of pointless.
Anyone know of a way to bypass this?

[Q] Wallpaper formatting

I am trying to format backgrounds for my Nexus 7 and I have tried
1280H x800W and Vise Versa, However the formatting tool, won't allow me to use the full picture, it crops at awkward proportions, I would like to be able to use the full picture for the clarity and crisp, instead of a bad pixilated, un-visually appealing picture. Is there a way to bypass this, like an app that formats pictures properly?
I would post image examples but I haven't posted enough threads

Quentarus said:
I am trying to format backgrounds for my Nexus 7 and I have tried
1280H x800W and Vise Versa, However the formatting tool, won't allow me to use the full picture, it crops at awkward proportions, I would like to be able to use the full picture for the clarity and crisp, instead of a bad pixilated, un-visually appealing picture. Is there a way to bypass this, like an app that formats pictures properly?
I would post image examples but I haven't posted enough threads
Click to expand...
Click to collapse
I think quick pic lets you use full image
https://play.google.com/store/apps/details?id=com.alensw.PicFolder&hl=en

PicSpeed HD Wallpapers also has an option like that.
https://play.google.com/store/apps/details?id=com.srsdev.wallpapers&feature=search_result#?t=W251bGwsMSwxLDEsImNvbS5zcnNkZXYud2FsbHBhcGVycyJd

@Ghost Thats just a different version of Gallery
@Milkk That doesn't support Nexus

For stuff like this, I would just use Paint.net on my laptop and use the resize function. But you are going to experience stretching if the aspect ratio is not the same.

I am trying to format backgrounds for my Nexus 7 and I have tried
1280H x800W and Vise Versa, However the formatting tool, won't allow me to use the full picture, it crops at awkward proportions, I would like to be able to use the full picture for the clarity and crisp, instead of a bad pixilated, un-visually appealing picture. Is there a way to bypass this, like an app that formats pictures properly?
I would post image examples but I haven't posted enough threads
Click to expand...
Click to collapse
Try crop image with dimension 1406x1280
Edit: just found this app and thats good https://play.google.com/store/apps/details?id=com.shirobakama.wallpaper
Sent from my Nexus 7 using xda premium

@korockinout13 I use Photoshop to format
@ucubz At least I can get the pictures full pictures into the screen, However I just have to work around the borders somehow

Just use higher resolution wallpappers and extend the margins to fit the full picture (by dragging the corners when setting wallpapper).
Worked for me! :good:

4K option or forced 1080p?

Was wondering if this display shows native 4K all the time or has user selectable option for it?
Was super pissed with my XZ Premium being forced to render at 1080p in all but a few apps.
4K is only useful on this size screen for VR, so won't make the same mistake again.

gaijin1% said:
Was wondering if this display shows native 4K all the time or has user selectable option for it?
Was super pissed with my XZ Premium being forced to render at 1080p in all but a few apps.
4K is only useful on this size screen for VR, so won't make the same mistake again.
Click to expand...
Click to collapse
Forced 1080p but you could make the xz 4k all the time through adb look it up

ariy11 said:
Forced 1080p but you could make the xz 4k all the time through adb look it up
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Click to collapse
Thanks for the reply. You answered my question.
Actually, the adb method was only emulated 4K, not native. Still selected the resources from xxhdpi folders and blew them up. Doesn't even select the xxxhdpi higher resolution images for 2K. For the best I guess. then it would scale it down to 1080p before enlarging to 4K adding extra blur.

ariy11 said:
Forced 1080p but you could make the xz 4k all the time through adb look it up
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Click to collapse
What command in adb can force this screen resolution?

For the XZ Premium apparently the following would have worked:
In an ADB shell:
wm size 2160×3840
wm density 820
In my case the wb size command gives me:
Error: bad size 2160×3840
Probably we need another resolution

After change it to 4K, the screenshot have an issue ( not capturing the whole screen as 4k but the screen at a corner with other space in black. How do you guys solve this issue?

wm size 2160×3840
wm density 820
In my case the wb size command gives me:
Error: bad size 2160×3840
Try....2160x3840
Not ....2160*3840

I just placed my xz2p into native 4k mode with the dpi set at 640/xxxhdpi. I really like the increase in real estate and the integer scaling makes everything look crisp.
That said, I've currently got two hiccups (not already mentioned, I also have the screenshoting issue hereto described) related to dpi change:
(1) The monochrome viewfinder is behaving strangely, but still serviceable (wrong aspect ratio & tap to focus doesn't move the focus indicator)
(2) The rotation animation is really broken and is either firing twice or has some other timing related issue.
#1 I can live with, but #2 is a real drag. I've turned the transition animations off in the dev setting, but it still looks really weird when i rotate.
Any ideas? It seems like sony has made some additional changes to deal with the 4k/1080p pop in and out. Simply setting the WM mode doesn't appear to manipulate those hidden settings. Perhaps one of the on phone apps needs to be disabled?
Edit: https://forum.xda-developers.com/xz...20hz-quest-t3852052/post78603665#post78603665
...according to the xzp forums, its not actually 4k? how can one verify this?
Edit2: Saying things that will have me eating crow in no time!
I'm at least somewhat convinced the xzp peps are wrong. I have been swapping the phone from [email protected] dpi to [email protected] dpi. If they are correct either both would look exactly the same or the 4k version would look worse (because of the double scaling). It clearly looks better. A good test to try; make the icons and text as large as you can in nova launcher and switch between the two. If you look at the top and bottom of the dark ring inside the camera icon you'll see clear aliasing at 1080p and smooth curves at 4k. Just a reminder anything that is not a perfect multiple of 160 will always cause scaling on android. same with dpi values over 640.
I've got a pretty decent canon camera(xc10) with 10x optical zoom, once I find the charger for it I'm going to try to get some clean photos of the screen in the two mode and post 100% crops here.

blinksilver said:
I've got a pretty decent canon camera(xc10) with 10x optical zoom, once I find the charger for it I'm going to try to get some clean photos of the screen in the two mode and post 100% crops here.
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Click to collapse
Can you do that? Also a comparison of Instagram, or VSCO high quality photos?

Wallpaper Aliasing and Compression. How to stop this?

I've been taking some 3840x2160 screenshots on my PC and transferring them to my phone uncompressed. They look really good when i look at them on screen through the gallery: Nice detail, sharp lines etc.
The images are taken in portrait so that when I download them onto my phone, I can rotate them 90 degrees so they fit the screen properly.
The problem is when I go to set the image as a wallpaper, the image becomes compressed ever so slightly. The once smooth lines are now noticeably jagged, even though there seems to be no stretching or scaling of the image. I am able to zoom in to the image to the exact same scale in the gallery and everything seems fine.
To me, there must some kind of process that is converting the image to a lower resolution or compressing the image in some way. My question is how do I stop it so the wallpaper looks nice and sharp.
Anyone know what is going on here who can tell me how I can prevent this?

+1

You've answered this yourself.
Your image is 2160p
The screen is 1440p
Or 1080p if like me you've realised that's m that it's virtually impossible to tell the difference and it's a negligible visual benefit for a significant battery hit.
So resize the image based on the screen you want to use or the phone will do it for you.
Depending on the launcher you're using you it may actually have a size limit and resolution so there should be they to take into account too.
Start by finding out what resolution you're using then get an image for it off the same resolution

dladz said:
You've answered this yourself.
Your image is 2160p
The screen is 1440p
Or 1080p if like me you've realised that's m that it's virtually impossible to tell the difference and it's a negligible visual benefit for a significant battery hit.
So resize the image based on the screen you want to use or the phone will do it for you.
Depending on the launcher you're using you it may actually have a size limit and resolution so there should be they to take into account too.
Start by finding out what resolution you're using then get an image for it off the same resolution
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I did some additional research into the issue.
The oneplus 8 pro is 3168x1440. It is perfectly capable of displaying a 3840x2160 image with no significant loss of quality. I was able to zoom the image in the photo gallery to cover the entire display (as a wallpaper would) and found the image still looked crisp as it should, yet setting it as a wallpaper caused quality loss despite scaling the same. Clearly the issue was to do with the wallpaper scaling process in android (what the exact issue is i am not sure).
Nevertheless, i downloaded an app from the playstore that was able to fix the issue. The app is called Image 2 Wallpaper on the playstore.