A while back I opened my phone to fix a few other things which was actually successful (power button, touch digitizer, in ear speaker volume).
But when I reassembled my phone, I powered it on and I noticed that the colors were dull on my lcd, with noticable banding in gradients that were black grey white. This occurs in everything that appears on my screen including videos; even pictures that I take on the phones camera after they are tranferred onto my mac - still have banding!
So I thought that it must be something to do with the phones lcd screen? And its not able to transition from gradient to gradient in objects, which is causing the banding.
Anyone ever heard of this being a problem? Any solutions? Even ideas that can help me figure out how this whole thing works.
Appreciate it.
The first two pics, you can see how they have a blue tone to them, and that's the same thing I see on my homescreen/videos.
The second pic is a normal gradient. If this were to be viewed on my phone, in the white/lighter areas of the gradient there would be pink/blue banding. Only the black to white gradient shows the banding, but other colors are still quite vivid such as reds, oranges, yellows, even green. But I do know that it has something to do with light and shading with respect to lcd coloring.
By the way, screenshots of my home screen or any other screen using ShootMe are normal without banding.
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bump...ahhhhhh
Guess taking it apart didn't work as well as you thought
Sent from my T-Mobile G2 using XDA Premium App
I get banding in wallpapers with gradients on my G2, regardless of color. Although it's much easier to see on black/white/gray type gradients. I figure it's just a limitation of the LCD to accurately reproduce said gradients because if I view the same images on my PC monitor the banding isn't present.
dhilberg said:
I get banding in wallpapers with gradients on my G2, regardless of color. Although it's much easier to see on black/white/gray type gradients. I figure it's just a limitation of the LCD to accurately reproduce said gradients because if I view the same images on my PC monitor the banding isn't present.
Click to expand...
Click to collapse
Hmm yeah, I get it in everything. Themes, videos, pictures, etc. It seems like there is a color limitation, its annoying.
TheToiletSpaula said:
Hmm yeah, I get it in everything. Themes, videos, pictures, etc. It seems like there is a color limitation, its annoying.
Click to expand...
Click to collapse
Did a bunch of Googling, came up with this:
http://www.reddit.com/r/Android/com...rs/?utm_source=twitterfeed&utm_medium=twitter
Long story short, use the Wallpaper Set and Save app from the Market to apply your wallpapers. For some reason it fixes the banding. Tried it myself, it works. Doesn't solve the problems with your video, etc. though.
So obviously the LCD is perfectly capable of displaying images without the gradient banding. My guess is when the gallery is used to set wallpapers the images go through some sort of compression process.
EDIT: Looks like the gallery (Gallery 3D in my case) is the cause of the problem. I tried QuickPic too but it displays banding as well.
EDIT 2: Actually I was mistaken. QuickPic doesn't display banding.
What seems to happen is that when you select an image to set as a wallpaper with Gallery 3D, it saves a copy of it and sets that copy as the actual wallpaper. The copy is compressed, which is what causes the banding. Both QuickPic and Wallpaper Set and Save do not create a copy of the wallpaper, hence why there's no banding. Looks like it's bye bye Gallery 3D.
Thanks for bringing this up, something that's bothered me for a while but never bothered to deal with it.
Yeah im going to continue to try and figure this out. If the Wallpaper Set and Save app can fix the wallpapers that means there must be some sort of calibration that can be done to draw out normal colors from your lcd.
The thing is...the black and white gradients that are affected are part of most images especially videos since gradients are transitioning all the time as the image moves.
There has to be sometihng that can fix this gradient transitioning problem for the black and white shades.
Thats where im at. :S.
Update:
I applied the above black to white gradient pic as my background using Wallpaper Set and Save to use as a test to whether it would get rid of the banding and...
IT DID NOT WORK.
My LCD still displays pink/blue banding along the transition from black to white. It must be some sort of damage that my phone sustained possibly though the 1. LCD screen connections to PCB, 2. The PCB circuits (under the shields), 3. Or the Flex Cable.
****, I need some ideas on how I can fix this...
Indeed, you might have some damage.
I downloaded your black to white gradient image and set it as my wallpaper with both Wallpaper Set and Save and QuickPic. Both times no gradients or color banding was present.
Sent from my G2 using XDA Premium App
Related
I've got this wallpaper from DeviantART in a zipped file in various sizes. I've tried cropping it down to about 480x800, but the phone's selection box when setting the image as a wallpaper doesn't allow me to select the whole picture, which seems silly since that is the phone's screen resolution.
I imported the full image to my phone and set the selection box to cover her entirety, but now the phone sets the middle default screen (out of three) to look like the second image below, and going to the left screen scrolls the background to look like the first image, which is essentially perfect; setting the launcher so the background doesn't scroll causes the picture to look like the second image.
Basically, I'm trying to figure out how I am supposed to get my background to look like the first image, when set to not scroll. Any insight?
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I think HTC Vision uses 960 x 800
Sent from my HTC Vision using XDA App
joemm said:
I think HTC Vision uses 960 x 800
Sent from my HTC Vision using XDA App
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Click to collapse
While a multi-screen wallpaper will be 960x800, a single screen wallpaper should still be 480x800, AFAIK.
EfemaN said:
While a multi-screen wallpaper will be 960x800, a single screen wallpaper should still be 480x800, AFAIK.
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Click to collapse
Have you tried creating a 960x800 wallpaper with her in the center 480x800 (i.e., 240x800 of extra space on both sides of the part you actually want)?
ianmcquinn said:
Have you tried creating a 960x800 wallpaper with her in the center 480x800 (i.e., 240x800 of extra space on both sides of the part you actually want)?
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That came to mind (and would probably work), but I have absolutely no knowledge of graphics manipulation, so I wouldn't be able to continue the background gradient off to the left.
What do you mean continue the gradient? Just take the image you have and cut it down so it's got a 3:5 (0.6) aspect ratio and then add some empty white blocks to the side
I had to crop it and stretch it (because of the bar at the bottom) but there's an example
If it's set to not move when you switch home screens, nobody will see the white bars on the side
Try that and if it works post the original image and someone can make a higher res version
LooieENG said:
What do you mean continue the gradient? Just take the image you have and cut it down so it's got a 3:5 (0.6) aspect ratio and then add some empty white blocks to the side
I had to crop it and stretch it (because of the bar at the bottom) but there's an example
If it's set to not move when you switch home screens, nobody will see the white bars on the side
Try that and if it works post the original image and someone can make a higher res version
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Click to collapse
Oh durr... that makes a lot of sense. I was in the mindset that the background would be stretched out for whatever reason.
That actually worked really well; there's an ever-so-small sliver of white on the left side, but that'll go away with some tweaking. What's the easiest way to crop and add the white bars with specific dimensions? I have access to Photoshop CS5, but I couldn't find anything beyond resizing and simply cropping and hoping I get the dimensions correct.
I actually linked the original 1920x1200 image in the first post, hyperlinked on the second word. Here it is again: http://i.imgur.com/GvEgU.jpg
EDIT: Never mind! I figured it out. I noticed the parameters next to the crop bar. Photoshop is fantastic... thanks for your help Looie. Now, just gotta figure out how to remove the white strip.
EfemaN said:
I've got this wallpaper from DeviantART in a zipped file in various sizes. I've tried cropping it down to about 480x800, but the phone's selection box when setting the image as a wallpaper doesn't allow me to select the whole picture, which seems silly since that is the phone's screen resolution.
I imported the full image to my phone and set the selection box to cover her entirety, but now the phone sets the middle default screen (out of three) to look like the second image below, and going to the left screen scrolls the background to look like the first image, which is essentially perfect; setting the launcher so the background doesn't scroll causes the picture to look like the second image.
Basically, I'm trying to figure out how I am supposed to get my background to look like the first image, when set to not scroll. Any insight?
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There looks to be a significant amount of banding in those images. Is there any way to reduce it? Perhaps setting the image to 65k colors, I'm not sure.
mejorguille said:
There looks to be a significant amount of banding in those images. Is there any way to reduce it? Perhaps setting the image to 65k colors, I'm not sure.
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I think that was due to my saving as a jpg. I did it as a PNG and the background is a smooth gradient like it should be.
The only thing I'm unhappy about is that, for the times that I'm at my homescreen with the keyboard open and the screen in landscape mode, the white bars are obnoxious and up-in-my-face. I don't think I really have a workaround for it unless I find someone more skilled at Photoshop that can continue the background on either side.
http://intridea.com/2010/10/27/android-wallpaper-template-photoshop
template here
Anyone else seeing severe degradation of images when you set them as your wallpaper? I thought it was just the image quality, but if you look at the same image in the gallery at the same zoom (filling the screen), it's ultra sharp, but when you set it was a wallpaper you get severe artifacting and compression. I tested this with a 1440x1280 wallpaper, so it should have been exactly the resolution for the screen (including side scrolling), but once set, it looked pixelated and ugly. I did find a workaround (albeit not a convenient one), where if you happen to have root, you can use ninjamorph to switch out the "default_wallpaper.jpg" in the framework-res.apk, res/drawable/default_wallpaper.jpg with your own wallpaper retitled to the same name. Immediately, the wallpaper looks infinitely sharper and really shows off the 720p screen!
Anyone else know of a better way to set a wallpaper without any degradation? (Hopefully, without having to mess with the framework-res.apk every time, and maybe without using a live wallpaper that sets the homescreen to a particular image? Even though they're not technically animated, those live wallpapers still seem to be a battery drain and ram hog...)
... ... ...
Regardless of resolution (gone as high as 3840x2160) once set as a wallpaper, Android seems to do some sort of compression that significantly drops the quality below what you see looking at that same picture in the gallery. I've also tried using 1440x1280 so that no stretching or cropping would be necessary to fill the screen, but that also didn't work. The only way to circumvent the degradation that I know of is to swap a system wallpaper with the one I want to set, and that bypasses the degradation. I've tried Wallpaper Set & Save, but that still produced the same drop in quality.
I know this is off topic, but could someone provide the stock LG Nitro wallpapers? I love that blue stock wallpaper, but I can't find it on the net.
... ... ...
itiskonrad said:
Regardless of resolution (gone as high as 3840x2160) once set as a wallpaper, Android seems to do some sort of compression that significantly drops the quality below what you see looking at that same picture in the gallery. I've also tried using 1440x1280 so that no stretching or cropping would be necessary to fill the screen, but that also didn't work. The only way to circumvent the degradation that I know of is to swap a system wallpaper with the one I want to set, and that bypasses the degradation. I've tried Wallpaper Set & Save, but that still produced the same drop in quality.
Click to expand...
Click to collapse
The answer is simple...u must use or resize the image to exactly 1280x720. I had the same issue before with my Atrix 4G, which has a qHD screen (960x540) and everytime I use a wallpaper that is smaller or bigger than 960x540, they will come out either blurred or pixelated and looks like Cr*p! But when I resize the image to exactly 960x540, the pictures came out sharp and clear.
I think this has something to do with Android's stock system. When my phone was upgraded to CM7, I no longer have that issue.
So to rectify your issue, try using 1280x720 pictures/wallpapers, or crop them down to exactly 1280x720, and they should come out crisp. Let me know if that helps.
i use Backgrounds by OGP, u can use that app to set wallpapers from your gallery. Works perfect every time.
Quickpic is the answer
I was having the same problem, but then I found Quickpic! Not only is it a far superior gallery management app, it also sets the wallpaper at pristine resolution...
Thanks for all your help guys! The exact resolution of native wallpaper is 1440 by 1280 (with wallpaper scrolling left and right, it's always double the x-axis, so 720*2). I ripped the original wallpapers from LGhome.apk, and those are their resolutions as well. It doesn't matter what resolution you choose, if you set the wallpaper through the android gallery, it looks like crap, whether or not it is exactly the right resolution (I tried 1280x720 as well, even though that is not the native resolution of the wallpapers on 720p android, due to wallpaper scrolling). However, I found that setting the wallpaper through Wallpaper Wizardrii or Just Pictures gave sharp results! As sharp as messing with the lghome.apk and switching the bluray.jpg wallpaper to my own wallpaper of choice! So that's what I'm using. If you want to see for yourself, give it a shot! Set a highly detailed wallpaper through the android gallery, and then install Just Pictures or Wallpaper Wizardrii and set it through that. Maybe I'm just absurdly picky, but the difference is super dramatic to me. Thanks guys!
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Second one is the one through Just Wallpapers (or Wallpaper Wizardrii). Maybe I'm just anal, but the first one through android gallery is just too blurry for me, and it looks worse on the phone's screen. The crossed railing and the boats, windows, etc just don't have the crispness when set through the gallery.
On my E4GT, when I turn the display brightness really low with my ScreenDim app, and then look at something (e.g., a PDF file) which fills the screen with a white background (and black text), while being in a dark room, I can see that the middle third of the screen is slightly pinkish, forming a pinkish vertical stripe, instead of white.
Does anyone else have the issue? If you want to try to see if yours has the issue, you can use ScreenFilter and turn the brightness really low, or you can use the free ScreenDim Trial and set to 25% or a bit lower (in Easy Mode). I'm wondering if I should return the phone to the store, or if they're all like this.
Does the lack of replies mean that I am the only one having the problem?
arpruss said:
Does the lack of replies mean that I am the only one having the problem?
Click to expand...
Click to collapse
LOL, good for you for being persistent AR.
I tested this for you on mine and I'd say mine is a little over half on the left side as what you described.
Edit: Title is a little misleading but your initial comment about the whole left side of the screen seems to be correct.
Sounds like a symptom of the application. I have not seen a single et4g with a pink line/screen come through my service and repair centers.
eeeeeeeeek said:
Sounds like a symptom of the application. I have not seen a single et4g with a pink line/screen come through my service and repair centers.
Click to expand...
Click to collapse
This is something you wouldn't normally see in a stock scenario. The lighting app allows for drawing the screen down below 25% and the discoloration is very faint. I wouldn't probably have even noticed it unless I was asked specifically to look for it.
I don't think AR was pointing it out as a problem. He was probably just curious if anyone else could duplicate it using the same setup (well, and to make sure he wasn't really having an issue too I suppose ).
ee[LEFT said:
[/LEFT]eeeeeeek;26299088]Sounds like a symptom of the application. I have not seen a single et4g with a pink line/screen come through my service and repair centers.
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Click to collapse
No, I don't think it's a software problem. The app lowers screen brightness to the lowest level allowed by the OS and then draws a light gray overlay over the screen. The device isn't rooted and the app uses standard documented apis. None of this should produce a nonuniform effect like this stripe. In theory, the same issue should come up if one turns the brightness to a minimum with the OS settings and them loads a light gray image. I'll see if I can produce it.
Also, you only see the effect well if you are in a quite dark room. But since I like to read in the dark, this matters to me. If all units have this, I'll live with it. But if it's only mine, I want it to be fixed.
This issue is one of the reasons I haven't rooted: I may need to return the unit.
You are right. I would want to know if it is my phone or not before I make a decision to have it replaced. What if the replacement phone not only has the same issue, but a couple of new ones as well?
Here's a test that doesn't require any special app.
Turn off automatic brightness and set brightness to minimum.
Then view this test image with the browser
http://pruss.mobi/test/A0.jpg
Zoom until it fills the screen. Go into a dark closet or other windowless room without lights. View the screen from different angles. To me, the discoloration is most visible if I view it in portrait mode, straight on. It disappears if I tilt the screen side-to-side a bit. Here is an attached copy:
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Here are some other test images. For me, the above one showed the discoloration best, but it might be different for different people.
http://pruss.mobi/test/70.jpg
http://pruss.mobi/test/80.jpg
http://pruss.mobi/test/90.jpg
http://pruss.mobi/test/B0.jpg
http://pruss.mobi/test/C0.jpg
http://pruss.mobi/test/D0.jpg
http://pruss.mobi/test/E0.jpg
The images are all solid gray.
Here's a QR code for the A0 image:
Hi AR. I tried it out again but I still do not have a line down the screen. I tried several screen brightness levels all the way to 0% where I could barely see the grey and still no line for me. Hope this helps and hopefully someone else will try it for you too.
tdunham said:
Hi AR. I tried it out again but I still do not have a line down the screen. I tried several screen brightness levels all the way to 0% where I could barely see the grey and still no line for me. Hope this helps and hopefully someone else will try it for you too.
Click to expand...
Click to collapse
The other issue my screen has is that if I view a 100% black image, and go into a very dark area (when I tested this most thoroughly, I was in a closed, windowless garage at night), and let my eyes get adjusted to the dark, eventually (after a bit of dark adaptation) I see an gray glow from the screen, with many irregular small patches that are completely black peeking out of the grayness. This is a very small aberration, but it is noticeable when outside at night running an astronomy app.
Interestingly, after a couple of months the problem seems to have decreased. Or my brain is screening it out.
I see wallpapers asked for a lot so I figured I'd write up a easy tutorial for people on how when they find great pictures to properly frame it out to work as you imagined it. I think among those less tech savvy and familar with image editing struggle with this so I'm going to attempt to help them here. We all know the built in wallpaper functionality of Android isn't exactly the greatest thing ever and usually does a better job of frustrating you more than it does actually getting the wallpaper you picked framed how you imagined it.. There are two great apps in the market that help makes this easier. Simple Image Wallpaper and MultiPicture Live Wallpaper...The problem with both is that they are basically cropping it for you to the correct aspect ratio using a center average. This means unless the wallpaper you picked out has the `cool part' dead center, it will still probably look terrible. For this demonstration I will be using Simple Image Wallpaper.
Secondly you're going to need a paint program that allows you to set custom aspect ratios with the selection tool/crop tool. Since this is a demonstration for the general public we're going to do this with a free program anyone can download. Paint Dot Net.
Recap.. Items needed
1. Simple Image Wallpaper
2. Paint Dot Net
3. Wallpaper
I linked an example wallpaper I will be using in this demo in recap item #3. Below is what this wallpaper looks like using Simple Image Wallpaper without any cropping.
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As you can see it cropped the center portion for you. You could go into any paint program and just cut out the glass and plop it on your screen but the problem is that it probably still won't fit how you imagined it because you cut the picture in an aspect ratio that is incorrect for the Nexus 7 (or any device) screen and the program will still have to stretch it and squeeze it onto the screen. So.. Assuming now you installed paint.net open it up and load the wallpaper I provided. Once it is opened select the rectangle tool, then change it to fixed ratio and enter in 800x1280 as shown here.
Now using your left mouse button click and drag on the image. The size you make this rectangle doesn't matter since it is always in the correct aspect ratio for your Nexus 7 screen. This will translate to your screen EXACTLY as you see it inside this rectangle. You probably tried a few times to perfectly draw out the rectangle to surround the glass perfectly but don't worry it doesn't even matter if you drew it off the glass.
Let's say this is what your screen looks like.
To `fine tune' this select the `Move Selection tool"
With this tool selected you should see dots appear around the rectangle. These are `drag points'.. Shift-Click, drag, and it will re-size the rectangle while keeping the correct aspect ratio. You only want to use the corner drag points for this to keep the aspect ratio correct. You can also click and drag inside the rectangle and position it around. Once done you should be able to perfectly frame the glass. Once you are done crop the photo, save it, copy it to your device and load it up in Simple Image Wallpaper in the Portrait selection.
Perfection
Use the same concept to now do your landscape picture (the image selection that is above Portait in Simple Image Wallpaper) except instead of cropping to 800x1280, you are now going to crop 1280x800.
Enjoy!
Revisions: -
Fixed accidental instruction typo & picture in step 1 - Fixed ratio / Not fixed sized (Sorry, used to using Photoshop :laugh
Removed instruction to disable scrolling wallpaper.. Just a habit of mine. I always forget it's a live wallpaper even though I've been using it forever.
Cool, fancy sharing your wallpaper?
Thanks for pointing me towards that app. I hate how Android handles wallpapers and it's always been one thing that bugged the hell out of me. I used Multi-wallpaper app in the past to mitigate the problem by only setting a single wallpaper but it was slow to load, especially during changing wallpaper rotates and such so I stopped using it all together with Jellybean 4.1.2. Simple Image Wallpaper solves these problems though and I love the way you can assign different wallpapers for portrait and horizontal modes with no lag in between.
Everytime iv took a picture of any TV screen, it's either purple or blue, you can see some slight red colours but what's up with this?
Anyone know or anyone have similar issues?
No filters lol
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kevinireland11 said:
Everytime iv took a picture of any TV screen, it's either purple or blue, you can see some slight red colours but what's up with this?
Anyone know or anyone have similar issues?
No filters lol
View attachment 5473311
Click to expand...
Click to collapse
Haven't noticed it on outdoor images but these of my TV the blacks are more bluish.
ggrant3876 said:
Haven't noticed it on outdoor images but these of my TV the blacks are more bluish.
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Click to collapse
Going to clear cache and data and try a reinstall see if that helps
No issue with mine
skimminstones said:
No issue with mine
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Click to collapse
That's really weird it seems to be only my TV in the living room, strange, must be whatever panel the TV is using
Edit: tried uploading a pic of my son's TV but it tells me my file size is to big :/
But this TV is fine
kevinireland11 said:
That's really weird it seems to be only my TV in the living room, strange, must be whatever panel the TV is using
Edit: tried uploading a pic of my son's TV but it tells me my file size is to big :/
But this TV is fine
Click to expand...
Click to collapse
Have you tried rotating the phone (like, portrait, landscape, reverse landscape, etc.)?
The TV might be using a polarising layer that simply conflicts with the camera for some reason. My P6 Pro for example works fine for every screen I've tried shooting so far, EXCEPT the main info display in my building's lobby, which has different colours disappear at different angles. E.g. in portrait it doesn't have any green, in landscape (turning counter clockwise, power and volume buttons on top) it doesn't have any red, etc.
fonix232 said:
Have you tried rotating the phone (like, portrait, landscape, reverse landscape, etc.)?
The TV might be using a polarising layer that simply conflicts with the camera for some reason. My P6 Pro for example works fine for every screen I've tried shooting so far, EXCEPT the main info display in my building's lobby, which has different colours disappear at different angles. E.g. in portrait it doesn't have any green, in landscape (turning counter clockwise, power and volume buttons on top) it doesn't have any red, etc.
Click to expand...
Click to collapse
I tried that there, I did see some colours come through the lens but then back to blue, it's weird because when I don't focus on the TV then point the camera back fast I see full colours but then the colours turn blue, I done this via landscape to, stays colourful for about about 3 seconds then goes all blue, strange, maybe it's a cheap panel with poor LEDs or more blue led pixels than red or green?
Edit: my son's tv is perfect, it's defo a cheaper panel then
I got the same thing when snapping a Pic on my desktop PC. I thought nothing of it at the time, as it wasn't for my personal use.
I'll try it again when the opportunity arises, see if I can repeat the effect.
@kevinireland11
Update on the blue screen effect.
My memory was a little fuzzy on that....
Turns out, I saw that when snapping a Pic of my other phone's IMEI/Serial number hidden menu.
Just tried it out w/both my Google Pixel 6 PRO & Samsung Galaxy Z Flip 3, was able to replicate w/both, but only in that scenario with both in dark there.
Placed both phones in non-dark theme & I could not replicate while snapping pix of the same IMEI/Serial number hidden menus.
Snapping pix of my TV/PC also produced normal pix.