Database Develop

Banding on images/backgrounds with gradients?

So, maybe its just me, but i notice that my nook, on any rom, does not seem to do well when displaying images that have subtle gradients. i have attached an image that i wanted to use for my background - it looks great on screen, but like crap on the nook. Anyone else notice this? I love the screen in general, but looking at that image makes it feel like i am using an 8-bit screen...

Divine_Madcat said:
So, maybe its just me, but i notice that my nook, on any rom, does not seem to do well when displaying images that have subtle gradients. i have attached an image that i wanted to use for my background - it looks great on screen, but like crap on the nook. Anyone else notice this? I love the screen in general, but looking at that image makes it feel like i am using an 8-bit screen...
Click to expand...
Click to collapse
I've found it can display images fine, but that when setting it as the wallpaper it messes up the gradient and also tends to make the image blurry, as though its changing the resolution (despite the image being 1200x1024 or whatever its suppose to be(possibly 1024x1200)

Color Banding with live wallpapers enabled
Hijacking this thread.
Is anyone else noticing color banding on NC with live wallpapers enabled?
For example, take a look at your desktop with the two settings:
1. Livewallpaper + analog clock widget
2. Regular wallpaper + analog clock widget
The clock displays horrible banding in test case #1. I tested this on 7.0.3. stable and several nightlies since. I've see a few posts on this in the other device forums but most of them seem to be issues with the supported bit depth of the actual screen itself or wallpapers in general so I wasn't sure if they were applicable.
Is this an Android issue or an issue with the rom? Something else?

MattJ951 said:
I've found it can display images fine, but that when setting it as the wallpaper it messes up...
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Click to collapse
I recommend Wallpaper Set and Save, free in the Market, to fix that problem.
https://market.android.com/details?id=com.android.wallpapersetandsave
It's a funny old app, made for Cupcake I think and hasn't been changed since then. The UI is small and kind of odd looking. Changing the default settings won't stick on my Nook Color. It really wants your wallpaper to be in SDCard/wallpapers. So it barely works, but it does make wallpaper look better.

Thanks for the suggestion. I've tried that app before but it looked like it was only for regular wallpapers (where I'm not really seeing the banding)? That or I'm dense and overlooking something.
Also where are the stock wallpapers normally stored on cm7 install?
Sent from my HTC Vision using Tapatalk

You know, there were a lot of people who noticed banding on the HD2 roms, and it did seem to vary between various roms. I never really noticed it (perhaps I used the good roms), so didn't follow it much, and couldn't say if there was a fix. But, there should be many threads on it in the HD2 android section.

I've also noticed pretty severe banding in gradients for both jpeg and png images.

Divine_Madcat said:
So, maybe its just me, but i notice that my nook, on any rom, does not seem to do well when displaying images that have subtle gradients. i have attached an image that i wanted to use for my background - it looks great on screen, but like crap on the nook. Anyone else notice this? I love the screen in general, but looking at that image makes it feel like i am using an 8-bit screen...
Click to expand...
Click to collapse
As said, use something besides Gallery and it'll look fine. I use Wall Switcher and have some 20 jpg's in a directory and it switches 'em every 15 minutes, but there are lots of options.
It's not the NC, the ROM... it's the app you're using to set the background.

Just to clarify, the entire desktop starts exhibiting banding (icons, Widgets) and not just the desktop background. Almost as if the os is switching color depth. Can you guys reproduce this on your cm7 installs? Maybe I need to post screens or something.
This ONLY happens when I select a livewallpaper. Regular wallpapers dont affect the widgets and desktop icons like this. If its a matter or how im setting the live wallpaper, How do you set a live wallpaper using gallery or any other apps? What directory are they stored? Thanks.
Sent from my Nook Color

7 replies and not one person mentions that the nook's screen is only 16 bit... of course there will be gradients, its a small issue and when I noticed it with a space themed background went ''meh'', and used a different one.

Kokanee483 said:
7 replies and not one person mentions that the nook's screen is only 16 bit... of course there will be gradients, its a small issue and when I noticed it with a space themed background went ''meh'', and used a different one.
Click to expand...
Click to collapse
Ah. Well that would make more sense. I always thought the display was 24-bit because people are always comparing it to the Ipad screen. The clock does look distractingly bad though haha...maybe I'm just anal.
Just added some screenshots using the Grass Live Wallpaper versus one of the stock CM7 ones. For posterity.

Go to the app store and download "Large Image Viewer" it will solve all your problems. The nook color screen is an IPS display, the same as the ipad and much better than other andriod tablets. Large Image Viewer is a very fast hi res viewer and no, I am in no way affiated with them.
Tom

tommewborn said:
Go to the app store and download "Large Image Viewer" it will solve all your problems. The nook color screen is an IPS display, the same as the ipad and much better than other andriod tablets. Large Image Viewer is a very fast hi res viewer and no, I am in no way affiated with them.
Tom
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Click to collapse
Errr...thanks but how is that related to this thread? haha

Dalingrin's OC kernels are 16-bit, stock is 24-bit. It's about that simple.
I campaigned for a way to switch live, and at one point he considered just such a kernel mod but I don't think it ever went anywhere.
Rodney

rhester72 said:
Dalingrin's OC kernels are 16-bit, stock is 24-bit. It's about that simple.
I campaigned for a way to switch live, and at one point he considered just such a kernel mod but I don't think it ever went anywhere.
Rodney
Click to expand...
Click to collapse
Finally some info related to my question. Going back to the stock kernel fixed the banding issue with live wallpapers. Thank you! If anyone else is interested...details are in the OC Kernel thread (search banding, color bit depth, etc.). Wish this was explicitly stated in the OC kernel OP.

Live Wallpaper Banding
Divine_Madcat said:
So, maybe its just me, but i notice that my nook, on any rom, does not seem to do well when displaying images that have subtle gradients. i have attached an image that i wanted to use for my background - it looks great on screen, but like crap on the nook. Anyone else notice this? I love the screen in general, but looking at that image makes it feel like i am using an 8-bit screen...
Click to expand...
Click to collapse
I'm noticing the same thing. The screen seems to handle gradients in regular wallpapers fine, but gradients in Live Wallpapers look horrible. Like someone stated it's like it's changing bit-depth. I'm on a stock, totally virgin Nook Color. Does anyone know how to work around this? I'm building Live Wallpapers and what looks fine on other devices looks terrible on the Color.

[Q] All Black Everything

So i have been trying to get a black background that is truly black.
everything i have tried has left a slight hue on the background. back 2 black is not supported or i would have tried that.
is there any way to get background to remain off completely and only light the pixels for the icons, clock, notification etc etc. i notice the info bar at the top is darker than my black background and no matter what i cant get the background to go completely black.
my reasoning is if i make the icons into line art, and keep as much of the screen off wherever i can i can stretch battery life even further. it worked wonders on my gs2. But having a slightly glowing background ruins all that.

I'm not sure whether it's supported, but you can try making a monochrome bitmap-file (.bmp) in MsPaint. At least you are sure this way that the black is truly black.
Have you tried using different launchers? Are you sure the hue is not just your icons giving some 'bleeding'?

thanks, i will give that a try.
its the same with go launcher and touchwiz. its actually magnified on the lockscreen showing lots of banding.

Try this pic. I use it on mine and looks black
Sent from my GT-N7000 using xda premium

bundles said:
thanks, i will give that a try.
its the same with go launcher and touchwiz. its actually magnified on the lockscreen showing lots of banding.
Click to expand...
Click to collapse
My first Note did this so I sent it back. My new one does not do it.

still no luck, apps with black backgrounds look fine.
i tried an all black bitmap and that didnt work either.
is there any way to turn background off and just leave it blank? would that give me a pure black background?
like i said i dont think its a hardware problem since the app backgrounds look deep black unlike the wallpaper. i did see something about the note only being 16 bit and that was causing weird display issues due to scaling or something, blah blah.

its using 24bits

thats right, the note is 24 bit and the os operates in 16 bit currently, right? either way i need to find a way to fix it.

I used a plain black GIF. Works fine for the home screen background, but on lock screen it has barely noticeable dark gray lines in it until you touch it and the unlock symbol appears.

here is the one i made
this black is one color 24 bit png on my note it is completely black at any brightness. let me know if it works. 800 x 1280 black correct dpi blackground
http://www.mediafire.com/i/?gcufvpft3yawf6p

or download "no wallpaper" from the market - simple app that just adds a wallpaper that is totally black. Works a treat.

Try an app called COLOURS by Tim Clark

ICS Status Bar theme [GT-P6800]&[GT-P6810]

hi all... ICS Status bar theme For [GT-P6800]&[GT-P6810]
To begin:
download the ICS Status bar file and copy it to the System > app
Now simply reboot the device.
3G P6800 http://www.mediafire.com/?l12vz3wz92cg1to

Doesn't work.
Do I have to rename the file? like replace the original SystemUI.apk?

Are you sure

first make a backup copy of the original SystemUI.apk
Then rename the file

be careful guys and remember that you will loose back, home, menu buttons if this doesn't work.
BTW it didn't work with me

for those cant make it work, remember rename/remove the SystemUI.odex as well, otherwise wont work

You don't have to remove the .odex file, where is that code going to go then? When you de-odex it puts a classes.dex file in the apk so there is no need for the .odex file.
Do not remove the .odex file.
Rename it to SystemUI.apk as well. The lazy way is to go into your system/app and copy the stock systemui.apk to your SD card, then paste this file over it, and set permissions.
The smart way would be to copy it in a shell. But that might be to advanced for some people.
And besides all he did was edit the images. At least that's what it looks like. I haven't download it to check for a classes.dex file.
Sent from my sticky fingers because Ice cream sandwiches are tasty.

Soooooo great, thanks !
ssaass said:
hi all... ICS Status bar theme For Galaxy Tab P6800 Only m
Click to expand...
Click to collapse
Hi !
Thank you for sharing this one, working so good ! Installed, perfect !
The ics bar is much more pleasant than the ugly gray honeycomb bar, thanks again !
Best Regards,

Zouk! said:
Hi !
Thank you for sharing this one, working so good ! Installer, perfect !
The ics bar is much more pleasant than the ugly gray honeycomb bar, thanks again !
Best Regards,
Click to expand...
Click to collapse
could you tell us what you did to get it working?

jamaljmys said:
could you tell us what you did to get it working?
Click to expand...
Click to collapse
I did a sum up of the topic :
1 - Go to system/app and rename SystemUI.apk and .odex both to .bkp
2 - At this time systemui keeps force close, just accept (again and again), copy now new SystemUI.apk to same place and set permissions as original SystemUI.apk
3 - Reboot and you're done!
Hope this helps

Zouk! said:
I did a sum up of the topic :
1 - Go to system/app and rename SystemUI.apk and .odex both to .bkp
2 - At this time systemui keeps force close, just accept (again and again), copy now new SystemUI.apk to same place and set permissions as original SystemUI.apk
3 - Reboot and you're done!
Hope this helps
Click to expand...
Click to collapse
thank you its working now
for all, the key is remove .odex file
thanks

You're welcome.

Do you have to be rooted?

lulugirl896 said:
Do you have to be rooted?
Click to expand...
Click to collapse
Yes you have to...

how to edit miniapp in icsbar?
minisns minidiar miniemail lost
Sent from my GT-P6800

Great but...
WARNING! All of that blue will burn your new AMOLED screen (blue is the first color to lose brightness). Use this if you want status icons permanently etched in to your screen.
I am not sure why people (even Samsung themselves) don't seem to realise that blue is the worst color for these static screens and constantly love to over use it.
Maybe we can get a status bar with the more OLED safe red, yellow, green or combination of those colors?

DaveC1964 said:
Great but...
WARNING! All of that blue will burn your new AMOLED screen (blue is the first color to lose brightness). Use this if you want status icons permanently etched in to your screen.
I am not sure why people (even Samsung themselves) don't seem to realise that blue is the worst color for these static screens and constantly love to over use it.
Maybe we can get a status bar with the more OLED safe red, yellow, green or combination of those colors?
Click to expand...
Click to collapse
Apart from black, which color is the most battery saving?
Sent from my GT-P6800 using XDA Premium App

emprize said:
Apart from black, which color is the most battery saving?
Sent from my GT-P6800 using XDA Premium App
Click to expand...
Click to collapse
Blue is the least efficient so I would guess red or green.
It isn't about battery saving it is about screen saving. I doubt that little bit of graphics for the status bar uses much power no matter what. It will burn your screen though. I think blue has a half-life of 17,000-30,000 hours (red/green over 100,000) so blue will be half of it's original brightness then. Of course you will start to see the burn much before because half brightness is pretty severe. You will start to see permanent image retention (mostly noticeable by a yellowish "stain" in the area of the static image) probably at a couple thousand hours (maybe sooner) depending on how bright you have the screen, and how sensitive you are to noticing these things.
I wish software developers, including Samsung themselves, would keep this in mind when creating mandatory static images on their devices such as status bars etc. OLED is great but it is not LCD when it comes to longevity, and care should be taken accordingly.

DaveC1964 said:
Great but...
WARNING! All of that blue will burn your new AMOLED screen (blue is the first color to lose brightness). Use this if you want status icons permanently etched in to your screen.
I am not sure why people (even Samsung themselves) don't seem to realise that blue is the worst color for these static screens and constantly love to over use it.
Maybe we can get a status bar with the more OLED safe red, yellow, green or combination of those colors?
Click to expand...
Click to collapse
DaveC1964 said:
Blue is the least efficient so I would guess red or green.
It isn't about battery saving it is about screen saving. I doubt that little bit of graphics for the status bar uses much power no matter what. It will burn your screen though. I think blue has a half-life of 17,000-30,000 hours (red/green over 100,000) so blue will be half of it's original brightness then. Of course you will start to see the burn much before because half brightness is pretty severe. You will start to see permanent image retention (mostly noticeable by a yellowish "stain" in the area of the static image) probably at a couple thousand hours (maybe sooner) depending on how bright you have the screen, and how sensitive you are to noticing these things.
I wish software developers, including Samsung themselves, would keep this in mind when creating mandatory static images on their devices such as status bars etc. OLED is great but it is not LCD when it comes to longevity, and care should be taken accordingly.
Click to expand...
Click to collapse
Factual Evidence to back this claim up?
Even so, @ 17,000 hours @ 24 houts a day is 708 Days. 90% of people do not keep devices more than a year. Personally I keep them MAYBE 6-8 months before I upgrade. So why sweat about the screen? I am going to put what ever color I want and that I like. End of story.

antiochasylum said:
Factual Evidence to back this claim up?
Even so, @ 17,000 hours @ 24 houts a day is 708 Days. 90% of people do not keep devices more than a year. Personally I keep them MAYBE 6-8 months before I upgrade. So why sweat about the screen? I am going to put what ever color I want and that I like. End of story.
Click to expand...
Click to collapse
people with amoled+ screens have already reported burn in issues after only a couple weeks.
primary affected area is status bar. although only really noticeable under certain conditions
for 7.7 users these are valid concerns not so much for 7.0+ devices.

[Q] Changing Lockscren Background with ICS Lockscreen

So I followed this guide to get the ICS lockscreen, but I can't figure out how to add wallpaper. (the background is black). It would be great if someone has any ideas on how to make wallpaper work! I think this is would be a great step in deamazoning the kindle.
http://forum.xda-developers.com/showthread.php?t=1941005
Thanks in Advance

thanks
macravin said:
So I followed this guide to get the ICS lockscreen, but I can't figure out how to add wallpaper. (the background is black). It would be great if someone has any ideas on how to make wallpaper work! I think this is would be a great step in deamazoning the kindle.
http://forum.xda-developers.com/showthread.php?t=1941005
Thanks in Advance
Click to expand...
Click to collapse
ive read the link you posted and thats great im gonna try asap also could you post a screenshot of what hour KFHD looks like with the black screen thanks

Sure
doriean said:
ive read the link you posted and thats great im gonna try asap also could you post a screenshot of what hour KFHD looks like with the black screen thanks
Click to expand...
Click to collapse
I took this with the camera on my computer, so it's not perfect, but that's what my ics screen looks like. The op from that link also posted a picture of his own.

thanks
macravin said:
I took this with the camera on my computer, so it's not perfect, but that's what my ics screen looks like. The op from that link also posted a picture of his own.
Click to expand...
Click to collapse
Thanks for the pic the photo was fine. To be honest id almost prefer the black screen then some
advertising for amazon gift card/at&t/ultrabook crap.
thanks for the post im sold and diving in...

Ya I have the same problem. This lock screen gets triggered when you change the DPI too, but anyways. I've been dealing with this too. I think that what says to use a wallpaper is set up in the framework-res.apk, and would require some major reworking to have it set the wallpaper from the launcher it's using. I say this because right now, the framework-res.apk is saying that if everything on the fire HD is working okay, display wallpapers within the app itself. And is everything isn't okay on the fire HD, display a black background. You would have to edit it to say that if launcher is using x wallpaper, than use x wallpaper as it's own wallpaper. It's so complicated because amazon reworked the entire android source code in relation to the lock screen, amazon didn't want anyone messing with it. To change the wallpaper, you will have to have a full knowledge of how to rebuild applications for android, and balls of steel to mess with an app like the framework-res.apk
Sent from my Fire HD with root!

craby1925 said:
You would have to edit it to say that if launcher is using x wallpaper, than use x wallpaper as it's own wallpaper.
Click to expand...
Click to collapse
I don't think we can get it using the same wallpaper as the launcher automatically either. I would be fine with it using amazon's stock images (you can change those with 7zip/winrar to match your launcher's anyway).
EDIT: does changing the dpi make the status/navigation bar smaller? If so, I might do that!

Ya I have the same problem. This lock screen gets triggered when you change the DPI too, but anyways. I've been dealing with this too. I think that what says to use a wallpaper is set up in the framework-res.apk, and would require some major reworking to have it set the wallpaper from the launcher it's using. I say this because right now, the framework-res.apk is saying that if everything on the fire HD is working okay, display wallpapers within the app itself. And is everything isn't okay on the fire HD, display a black background. You would have to edit it to say that if launcher is using x wallpaper, than use x wallpaper as it's own wallpaper. It's so complicated because amazon reworked the entire android source code in relation to the lock screen, amazon didn't want anyone messing with it. To change the wallpaper, you will have to have a full knowledge of how to rebuild applications for android, and balls of steel to mess with an app like the framework-res.apk
Sent from my Fire HD with root!

Nova Launcher Display Issue

Hey everyone,
I've been looking for an answer to this question, but I can't find one anywhere, blah, blah, blah.
I am running Nova Launcher Prime 4.2.2 over the stock launcher on my N920A with Android 5.1.1. I have a wallpaper with a solid black background. It looks something like the first image below. You might not be able to see it on a monitor, but the problem is that across the bottom, something (I am assuming it's my stock launcher or theme service) is lightening my background. It is happening in front of where the dock would normally be. In order to highlight what the problem is, I took some screenshots and then used paint to color in my background. Since I am a first-time poster, I can't post links, but I can tell you that my screenshots are on i dot imgur dot com with the following file names (sorry for technically posting links...):
My home screen with Default theme: tEvYClN.jpg
My home screen with Default theme and the background colored white: i9wfuK7.jpg
Now here is what happens when I change the system theme to sd-Black
My home screen with sd-Black theme: T7tDb5N.jpg
My home screed with sd-Black theme and the background colored white: vpfYaE7.jpg
Here is one more view of what I see on my screen. iNH7n7t.jpg
So changing the theme adjusts the height of the color distortion at the bottom. and top I want to know how I can get rid of those bars altogether. I am sure that this bar on the bottom changes when I adjust the system theme and I have tried it with other wallpapers with the same result. I have done as much troubleshooting and narrowing down of the problem as I can. Any thoughts? Thank you all for your help!

Probably samsung pay
Sent from my SAMSUNG-SM-N920A using Tapatalk

tdevaughn said:
Probably samsung pay
Click to expand...
Click to collapse
I looked, but I have never set up Samsung Pay on my phone, and it is currently not running. :-$

Pull up on that image
Sent from my SAMSUNG-SM-N920A using Tapatalk

tdevaughn said:
Pull up on that image
Click to expand...
Click to collapse
Sorry, what image?

banovik said:
Sorry, what image?
Click to expand...
Click to collapse
did u find any solution to your problem?

karan2012 said:
did u find any solution to your problem?
Click to expand...
Click to collapse
Not yet. I still have that bar across the bottom. Any thoughts?