Perseus screen engine : Spread your colors ! - Galaxy S III General

OK guys, after the sound thread, i decided to open a new thread, speaking about the new AndreiLux's baby: The color engine
WHo remember Voodoo color for S.Amoled screens like GalaxyS and Nexus S?
certainly most of you
Yesterday Andrei released his first version, included in STweaks, of his new way to control screen colors ( and more!)
let's start with a Granger Rainbow to better understand how colors are
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As said, this new engine can be found in STweaks ( You must use Perseus 32 or newer kernel )
And here are Andrei explanation about settings ( as he said, they can be not very true and surely unfinished)
image can substitute 1000 words in this case
Ok in the images you can find alse descriptions
Only a word to the setting called
Front Buffer Early Suspend Delay
Click to expand...
Click to collapse
It is used to set a dalay in which time the phone continue to draws IE is used for CRT-OFF animation ( set to 100ms to have the correct animation)
The thread is done with, in mind, the intention to collect users display's configuration and make better colours and calibration
Please indicates the screen mode base ( Dynamic,Standard or Natural) or settings will be fault.. and also all intent while you were setting things ( for example to have better colors,or simply more vivid colors etc)
Hope to see movement here !
PS:Andrei said a lot more about settings but is so hard to collect all and make clear for all, so, so far, i qill limit to above, waiting for more clear details
Users Configurations:
mamba720027
nfsmw_gr
All credits to AndreiLux for that implementation
Click to expand...
Click to collapse

woow.. nice

Well,here's mine!
Screen mode: Dynamic
Chroma Saturation Control
-4
5
-4
0
-2
0
-2
0

I think the iphone has a good screen calibration can someone simulate that?

dimi22 said:
I think the iphone has a good screen calibration can someone simulate that?
Click to expand...
Click to collapse
Won't look the same on your phone either way, as all screens are different.

Toss3 said:
Won't look the same on your phone either way, as all screens are different.
Click to expand...
Click to collapse
Yes i understand that but maybe the colors can be made more accurate and the black clipping can be solved

dimi22 said:
Yes i understand that but maybe the colors can be made more accurate and the black clipping can be solved
Click to expand...
Click to collapse
this are my values with dynamic screen, great colors for me
-4
5
-4
-1
1
-5
13
15
deep colors and black status bar.

Where is the Stweak with screen configuration?
Oops, never mind, sorry about my mistake
Sent from my GT-I9300 using xda premium

these settings don`t affect screen lifetime and quality?

Can it fix zero black level bug? The GS3 display is always like #050505. It's never really 0 Volt per pixel. Looks cheap like LCD.

This doesn't affect the whites at all. Still doesn't fix screen tint issues.

nice start..

DualJoe said:
Can it fix zero black level bug? The GS3 display is always like #050505. It's never really 0 Volt per pixel. Looks cheap like LCD.
Click to expand...
Click to collapse
Er... SGS1 wasn't pure black neither, you could see a bit of brightness in the dark.
SGS3 is a bit brighter but calling it "cheap LCD" is going a bit too far.
I still have to see a LCD screen with the same black level (and I'm in front of one of the best MVA screen with something like a 2500:1 contrast).

Yep, right. I rather meant "cheap" regarding you can still see the borders (very dark rectangle) at night. Not the overall quality.
My SGS Plus (I9001) is perfectly dark though.

burner07 said:
these settings don`t affect screen lifetime and quality?
Click to expand...
Click to collapse
I'm guessing they will as per standard amoled rules.
- Darker screen = less battery
- Some colours (red iirc) = less battery
- I also guess that higher saturation causes more battery drain cause the pixels are outputting stronger/brighter...
But really, this is more about tweaking your screen to meet your preferences - the small changes most users will make will probably have a negligable effect on battery life.

Now, if only someone could port / make this for the original Galaxy Note and it's cr**py mDNIe sh**ty failure... that'd be great .
Just a wild post here, don't mind me.

Im unable to find some of these options on stweaks. Using Perseus 33.1.

R: Perseus screen engine : Spread your colors !
Perseus 33 si using new way to calibrate colors,and will be final in next small update
Until Andrei release it,I will no more update this thread as marked obsolete at the day of today
Sent from my GT-I9300 using xda premium

oswade said:
I'm guessing they will as per standard amoled rules.
- Darker screen = less battery
- Some colours (red iirc) = less battery
- I also guess that higher saturation causes more battery drain cause the pixels are outputting stronger/brighter...
But really, this is more about tweaking your screen to meet your preferences - the small changes most users will make will probably have a negligable effect on battery life.
Click to expand...
Click to collapse
he meant will the screen get damaged.... some places it says not to mess with the colours in amoled screens... eg: screen filter apps...
even i would like to know this...
but i doubt this because andreilux knows what he is doing..
can we start a thread for sharing everyones screen settings ? or do we use this thread for that...

Here is mamba720027's latest STweaks Screen color settings for anyone who want to try while we wait for the galaxy s3 calibration. This the best i could get it at this point.
[Global Controls]
Enable Register Hook - Checked
Enable Master Sequence - Checked
[Chroma Saturation Control]
2
8
17
8
3
-8
-1
[White Colour Temperature Control]
Toggle colour temerature control - Checked
Colour Temperature
-2000K
[SCR Colour Channel Modifications]
White Colour Balance
-4
-4
-4
Primary RGB Colour Channels Addends
16
16
4
13
-50
-4
9
-26
-7
Secondary YCM Colour Channels Addends
-11
16
-16
-8
-6
-3
-14
8
-11

Related

[ANALYSIS] ASUS Eee Pad Transformer screen measurements

Hi guys!
As you know EeePad Transformer has quite a capable screen, with excellent viewing angles and good response time.
I just wrote an application to ease screen measurements, Free on market and Open Source, named Screen Test Patterns
But you might ask why its color look desaturated despite its correct contrast ratio.
I measure mine at 593:1.
All this explains when looking at the measurement graphs.
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Luminance​
Click to expand...
Click to collapse
Target 2.2 Gamma is the white curve.
Almost every color are displayed brighter than it should, which results in washed out colors.
Red curve is also brighter than Green and Blue ones, that makes the colors looks a bit reddish.
At almost white there is some clipping, fortunately quite minor.
Gamma​
Click to expand...
Click to collapse
Consequence of the luminance curve, the gamma curve is very far from following 2.2 reference line as it should.
Average on this screen is gamma 2, which explains by itself the washed out colors (even if it's not the only factor)
Near Black
Near white​
Click to expand...
Click to collapse
Near black there is no clipping but the screen uses a common trick to increase the visual contrast, by lowering the luminance of the darkest values (its called black point compensation)
That's not pure 2.2 nor fits to the sRGB model, but it's a nice detail improving the visual result IMHO.
Near white thing's are not right, there is some clipping. Means values 252, 253, 254 and 255 gives the same output. Not terrible in its amount but never welcomed.
Now about colors:
RGB Levels (compared to 6500K)​
Click to expand...
Click to collapse
Here is individual Red Green and Blue channels values compared to what they should be to get a 2.2 gamma response at D65 / 6500K which is the industry standard for content display (web, videos)
Color Temperature​
Click to expand...
Click to collapse
Color temperature is mostly between 7500K and 8000K, but that's just numbers.
The most important in this graph is its linearity.
As you can see the white balance shifts to blueish in low between 0 and 15% gray.
This is because the black point of this screen (which is not black obviously) has not the same color characteristics as the other grays.
This screen doesn't really shines in this area, but its the case of most LCDs so there's nothing to worry here.
Still, it explains why dark grays look a bit blue.
Saturation Lumiance​
Click to expand...
Click to collapse
Saturation Luminance graph allows to detect artificial color boosting like by an image processing
This graph shows that the luminance of colors are fairly linear. Not perfect due to screen hardware limitations, but okay.
Only notable is Greens and Yellows which are often lighter than then should. Once again it reinforce the lack of color punch, especially since its the colors our eye is the most sensitive to.
Saturation Shifts​
Click to expand...
Click to collapse
100% Saturation is pure Red/Green/Blue/Yellow/Cyan/Magenta
This graph shows how much saturated are colors which are not at 100% saturation level (every non primary or secondary colors)
This graph shows that Red and Green colors lack saturation the most.
Blue saturation is a bit higher than it should in general.
I must admit I have no explanation why Cyan saturation is measured so high. It may demonstrate the presence of some sort of processing, but probably I don't understand the graph well enough yet.
CIE Diagram​
Click to expand...
Click to collapse
And here is finally the famous CIE Diagram.
The latest explanation for the dull color is here: you can see the gamut is a bit small compared to the reference sRGB behind.
A smaller gamut has for consequence less vibrant colors.
Blue is okay, still lacks some extend, but Red and Green extension is lacking, as perceived by naked eye.
The additional dots show the screen is not affected by any color conversion distortion.
Wow, nice analysis there! I'm planning on getting a Transformer this fall for light school work stuff for ultra portability and long battery life.
So does this mean you are working on a Voodoo Color for the Transformer IPS panel?
jamesnmandy said:
Wow, nice analysis there! I'm planning on getting a Transformer this fall for light school work stuff for ultra portability and long battery life.
So does this mean you are working on a Voodoo Color for the Transformer IPS panel?
Click to expand...
Click to collapse
You're welcome.
Transformer Kernel has no trace of any drivers nor hardware capable of color correction.
It's not impossible Tegra2 display controller has a LUT but still unlikely as no Tegra2 device I saw offer "color vibrance" control or things like that integrated in their PC hardware and drivers.
At the contrary, Galaxy Tab 10.1 which is also Tegra2 adds another screen controller with a very advanced color correction engine (implementing even things like sharpening, noise reduction, dynamic contrast, chroma channels adjustments), not available in Transformer hardware.
Tegra2 is not especially documented.
Honeycomb is closed source (for a potential OpenGL engine)
So no not planned so far, it's just an analysis in order to better understand what/how/why, and have fun with the tool I just wrote.
Well written analysis. Although I don't have a transformer (maybe wait for newer generations?), I really appreciate your approach in the refinement of sound and visual on our android devices. Your measurements and analyses are some of the most, if not the most, detailed and informative ones that laymen like me will be able to obtain and comprehend. Thank you.
Great analysis.
Just a question: did you run the analysis on a B60 or B50?
In my experience, having owned the two, B50 has a very cold display, (as in your finding) while B60 is much warmer and pretty close to my calibrated monitor.
wis38 said:
Great analysis.
Just a question: did you run the analysis on a B60 or B50?
In my experience, having owned the two, B50 has a very cold display, (as in your finding) while B60 is much warmer and pretty close to my calibrated monitor.
Click to expand...
Click to collapse
Oh really there are several screen revisions with different color characteristics? (only backlight or more profound?)
I'm not sure what you cakll B60 or B50. If it's about the serial number, mine is partially wiped from the bottom transparent sticker, but its seems its:
B40KAS057442 12
The screen on my device is a bit cool but looks pinkish despite what the T° in Kevlin would say.
I'm not totally confident in the temperature reading of my colorimeters BTW, in some conditions.
Please tell me all that you know about different screen revisions
Anyway it makes sense there are several screen revisions because my measurement don't match in terms of temperature DisplayMate ones.
supercurio said:
It's not impossible Tegra2 display controller has a LUT but still unlikely as no Tegra2 device I saw offer "color vibrance" control or things like that integrated in their PC hardware and drivers.
Click to expand...
Click to collapse
Only just found this thread. Man, if accurate, that's seriously disappointing. Did you ever get any reply on Twitter from Nvidia re LUT info or documentation?

Nexus S 4G screen accuracy

So I took the time tonight to measure the color accuracy of my Nexus S 4G with my equipment. So without further a due:
Luminance
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Color Temperature
Gamma
RBG balance and DeltaE
(All measures used against the Rec709 standard. Using Nexus S with a slightly modified voodoo colors profile)
Cool, looks like the Nexus did pretty well
btw the images aren't loading from me, I have to right click them and open them in a new window to see them.
Pictures should be fixed, or at least showing up as more than just links now.
I have no idea what this means.
Its usually a test done for TVs to see how close your TV is to the reference standards.
In the first picture it tells you how uniform the brightness of the image increases.
The second one is how close the color is to pure white (equal balance between red, blue, and green) at every 10% increase in brightness.
The third graph is gamma. A little harder to explain but this basically shows if the display will appear darker or brighter as a whole.
The final shows the actual outputs of red, blue, and green at each brightness. The lower portion shows how much it deviates from reference.
(Any HT junkies out there, yes I know I'm using the term brightness incorrectly here only to make this more accessible)
Sent from my Nexus S 4G using XDA App
so, do you think you can make a color profile that is in every way perfect?
Not with the kernels I have seen. Most only have one point of change (ie color multipliers in Voodoo). Something perfect would take quite a bit of battery use I would imagine as most image processors that can create "perfect" picture are usually stand alone units costing $1000 plus.
I can also tell you each screen is not the same so what might be a perfect profile on my screen would be different for you. Depending on plenty of things including screen age.
Heres my Voodoo settings I used for the measurements I took
Color profile: Voodoo v1
RGB multiplier:
R=1769117440
G=199667
B=216805280
I did not touch the Gamma settings for the measurements but there is room for change there.
wingman1659 said:
Not with the kernels I have seen. Most only have one point of change (ie color multipliers in Voodoo). Something perfect would take quite a bit of battery use I would imagine as most image processors that can create "perfect" picture are usually stand alone units costing $1000 plus.
I can also tell you each screen is not the same so what might be a perfect profile on my screen would be different for you. Depending on plenty of things including screen age.
Heres my Voodoo settings I used for the measurements I took
Color profile: Voodoo v1
RGB multiplier:
R=1769117440
G=199667
B=216805280
I did not touch the Gamma settings for the measurements but there is room for change there.
Click to expand...
Click to collapse
curious wingman how do i optimize my screen. i would like to learn
Any chance you could do this on a SLCD Nexus?
devmonster86 said:
Any chance you could do this on a SLCD Nexus?
Click to expand...
Click to collapse
Joking right? Lol.
Sent from my Nexus S 4G using XDA App
wingman1659 said:
Heres my Voodoo settings I used for the measurements I took
Color profile: Voodoo v1
RGB multiplier:
R=1769117440
G=199667
B=216805280
I did not touch the Gamma settings for the measurements but there is room for change there.
Click to expand...
Click to collapse
Do you have a specific set of numbers you believe are the best for what is available currently through Voodoo?
Thanks for the great work.

Fix for Black Crush/Color issue on Galaxy S3 AMOLED

i tried to fix the black crush/color issue on my S3 with Filter Your Screen
(13 Alpha; 255 Red; 225 Green; 255 Blue)
Original
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With filter
but there is a warning for AMOLED devices:
***OLED screen owner please read***
(AMOLED screen of Samsung Galaxy S, Super AMOLED Plus screen of Samsung Galaxy S II, etc.)
- you should use only white, gray or black filter only.
- using color filter (not white, gray or black) for a long time may cause your screen more color tint. (it's about OLED screen property, not my fault)
- using any color filter other than black will cause black pixel being not 'true black' pixel anymore. (that means some power is required for black pixel)
- if the filter does not cover all of your screen, please uninstall this app because this may cause irregular color burn to your screen.
Click to expand...
Click to collapse
is this filter going to damage the amoled screen and how much it effects the battery?
I did not realize the S3 had a problem with black crush, I though it was just us unlucky G-Note owners
We have just been using the free "Screen Adjuster" app , but it kills the battery and makes blacks gray.
John
I definitely have a black crush issue with mine. I've tested 4 and they all have it but one dev has already found a fix for it. Just be patient till its released. Shouldn't be long now.
There's indeed a heavy black crush problem on this device (beside the yellow tint...). Hope some developer will fix this. Dark photos or videos don't show any details on this screen....
NaimC said:
I definitely have a black crush issue with mine. I've tested 4 and they all have it but one dev has already found a fix for it. Just be patient till its released. Shouldn't be long now.
Click to expand...
Click to collapse
Supercurio by any chance? Good luck with that, after saying it was pretty much possible to fix the problem in the Galaxy Note after the ICS source was released, we did not hear much in the thread he started, then after a few idiots tried low tactics to get a responce from him, he got the hump and closed the thread.
This is such a stupid problem, and one that samsung customer services still refuse to acknowledge.
I was told to return my device and get a new one from a different batch, which I did, only to find the new one had the same issue. Now they want me go without my brand new device for 2 weeks while they fix it...wtf!!!
I was considering the s3, but after seeing this I am holding fire.
CONTACTMC said:
Supercurio by any chance? Good luck with that, after saying it was pretty much possible to fix the problem in the Galaxy Note after the ICS source was released, we did not hear much in the thread he started, then after a few idiots tried low tactics to get a responce from him, he got the hump and closed the thread.
This is such a stupid problem, and one that samsung customer services still refuse to acknowledge.
I was told to return my device and get a new one from a different batch, which I did, only to find the new one had the same issue. Now they want me go without my brand new device for 2 weeks while they fix it...wtf!!!
I was considering the s3, but after seeing this I am holding fire.
Click to expand...
Click to collapse
Yea, it is one of my few real niggles with this handset, but I have faith Supercurio will fix it. He mentioned that unlike the Note, the S3's fix was much easier and purely software based.
Also, I don't think changing S3's will solve the problem. It is my belief that ALL S3's suffer from this issue, it's just not all people realise or notice because it's not generally that obvious.
Now im using Filter Your Screen with (13 Alpha; 255 Red; 225 Green; 255 Blue)
question remains: is this filter going to damage the amoled screen and how much it effects the battery?
autostart on Filter Your Screen doesn't work
353523 said:
i tried to fix the black crush/color issues on my s3 with 'Super Manager 3.0'
(Screen Color Adjuster; Red +90, Green +65, Blue +90)
Then i found a similiar tool called 'Filter Your Screen'
(both available on Google play)
gives a warning for AMOLED devices:
does this only apply to the Filter Your Screen application
or does every Screen Adjuster is going to damage AMOLED screens?
(sorry for my english)
Click to expand...
Click to collapse
Could you please post some pictures showing the black crush/color issue on your s3?
My s3 does not have this issue compared with my galaxy note before.
Original
With filter
another application to fix black crush: BackLightFilter
push
Update from supercurio:
http://project-voodoo.org/articles/galaxy-s-iii-international-black-crush
353523 said:
Update from supercurio:
http://project-voodoo.org/articles/galaxy-s-iii-international-black-crush
Click to expand...
Click to collapse
Thanks for this. I'm really waiting for this. Modification by supercurio.
Will this fix ink mark too?
Or just black crush
-----------------------
Sent from my Samsung Galaxy S III using Tapatalk 2
Open this picture on your S3:
http://img256.imageshack.us/img256/2546/crush.png
if you can't distinguish the first 8 frames, than you got the black crush problem.
i cant see the first 11 from my comp or my phone.
Can someone please explain what black crush is? Is it just too dark shadows?
Sent from my Galaxy SIII
look at the pictures in the thread.........
there is not gradual scaling from black to the rest of the color spectrum....if its not bright its Super Dark, no inbetween.
as in watching movies, a dark movie like the crow, or spawn. a lot of the scenes its just to dark to reallly even tell whats going on. but on my TV or even another phone, while its still dark you can SEE the difference in Blacks which defines the shapes of that scene.
or thats what i take from it anyway. i have not read anything just from my phone to other thread and pictures this is what i think it is.
ok, thanks. Now I can name this annoying "thing" when watching avi movies. I always blamed avi files for this. But as I can remember it's a common "feature"/bug in phones. I remember the same on Nokias too.
Sent from my Galaxy SIII
i cant see the first 11 from my comp or my phone.
Click to expand...
Click to collapse
Make sure you're on maximum brightness in a somewhat dark room and play around with the mDNIe scenarios and modes.
'Dynamic' mode doesn't allow me to see the difference, but others do - but I don't like their coloring.
Now I can name this annoying "thing" when watching avi movies. I always blamed avi files for this
Click to expand...
Click to collapse
Very often it's the source file. Compression works by searching for blocks (or other geometrical shapes, e.g. triangles) of approximately the same color and storing them as having the same identic color. The "stronger" the video/image/audio compression, the more such artifacts you get. (Of course it's more complicated than that, since it has to consider 3 dimensions, them being X, Y and time T)
Sometimes players try to correct these issues with post-processing algorithms (which have their downside too), so it's more noticeable on some devices than others.

Z5 Premium display white balance - heavy blue tint

Coming from a Z2, which had apparently the last semi-accurate display released by Sony, the Z5P's default color temp is insane. According to reviews, it's close to 10,000K (where ~6500K is ideal for daytime use). Check out this comparison shot below (Z5P on the left, Z2 on the right, default white balance settings):
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Everything has a blue tint (as expected with that cold color temp). Fortunately there is the white balance option, but I find it works somewhat. It uses color overlays, and results in even higher grayscale dE (you can see it with your eyes, let alone a colorimeter).
Am I the only one annoyed by this? Is there a panel lottery or is this considered 'normal' for the Z5P?
could be following possible reasons
1. is your device rooted and/or did you install/remove any screen filter app (such as twilight) ? might some setting were leftover.
2. was device xposed to high temperatures while playing games/watching movies?
YasuHamed said:
could be following possible reasons
1. is your device rooted and/or did you install/remove any screen filter app (such as twilight) ? might some setting were leftover.
2. was device xposed to high temperatures while playing games/watching movies?
Click to expand...
Click to collapse
Just out of curiosity, why does rooting the phone cause this? I have a rooted z5p and my dad has an unrooted one and I do notice a difference in the display similar to what is shown in the OP. I do have the DRM-emulated keys on my phone though so I thought that would make it similar to how it was.
RacecarBMW said:
Just out of curiosity, why does rooting the phone cause this? I have a rooted z5p and my dad has an unrooted one and I do notice a difference in the display similar to what is shown in the OP. I do have the DRM-emulated keys on my phone though so I thought that would make it similar to how it was.
Click to expand...
Click to collapse
rooted device means the core hard setting are subject to be changed by any app. May be some app did without even notifying you once root access were granted.
DRM keys is not going to affect the tint. in fact you have drm keys in place thats just a value addition.
silencer51 said:
Coming from a Z2, which had apparently the last semi-accurate display released by Sony, the Z5P's default color temp is insane. According to reviews, it's close to 10,000K (where ~6500K is ideal for daytime use). Check out this comparison shot below (Z5P on the left, Z2 on the right, default white balance settings):
Everything has a blue tint (as expected with that cold color temp). Fortunately there is the white balance option, but I find it works somewhat. It uses color overlays, and results in even higher grayscale dE (you can see it with your eyes, let alone a colorimeter).
Am I the only one annoyed by this? Is there a panel lottery or is this considered 'normal' for the Z5P?
Click to expand...
Click to collapse
Download CF.Lumen from Play Store and play with the settings. I decreased the color temp to 6500K with the app, looks way better.
Sent from my Z5 Premium using XDA Labs
YasuHamed said:
could be following possible reasons
1. is your device rooted and/or did you install/remove any screen filter app (such as twilight) ? might some setting were leftover.
2. was device xposed to high temperatures while playing games/watching movies?
Click to expand...
Click to collapse
i noticed something very interesting.
in DEVELOPER OPTIONS
if your windows Animation scale / transition animation scale/ Animator duration scale affects are "ANIMATION OFF"
the screen will wakeup instantly
when affects are ON, and screen wakesup will be fading in style (on double tap or by the power button) , and i noticed some blue tint. so closed the animation affects and now screen is brighter and good to go!
The device was brand new when I took it out of the box. Apparently this is standard - I went to an electronics store and compared my screen with the demo units. All of them have the blue tint.
As for the CF Lumen suggestion, there's no need for it - Sony includes a white balance setting, however this reduces both brightness and contrast. A pity, since my Z2 (on the right) has a white color temp of ~7000K (very close to the ideal 6500K).
If anyone has used a colorimeter to calibrate the display, please post your white balance settings.
Wired cos mine has 6600 checked with cf.lumen
Sent from my E6853 using XDA-Developers mobile app
silencer51 said:
The device was brand new when I took it out of the box. Apparently this is standard - I went to an electronics store and compared my screen with the demo units. All of them have the blue tint.
As for the CF Lumen suggestion, there's no need for it - Sony includes a white balance setting, however this reduces both brightness and contrast. A pity, since my Z2 (on the right) has a white color temp of ~7000K (very close to the ideal 6500K).
If anyone has used a colorimeter to calibrate the display, please post your white balance settings.
Click to expand...
Click to collapse
CF.Lumen won't leave an impact on the brightness so you could try that also.
Sent from my Z5 Premium using XDA Labs
I'll try it, but I find that hard to believe. All of the 'color temp' apps (including Sony's settings) use colored overlays (like screen filters) - so brightness and contrast are affected.
silencer51 said:
As for the CF Lumen suggestion, there's no need for it - Sony includes a white balance setting, however this reduces both brightness and contrast. A pity, since my Z2 (on the right) has a white color temp of ~7000K (very close to the ideal 6500K).
Click to expand...
Click to collapse
Presumably you're aware that you can set the colour temprature in cf.lumen.
I think I'll just unlock my BL, root, and install the kcal module. Seems to be the best way for hardware level adjustments.
silencer51 said:
I think I'll just unlock my BL, root, and install the kcal module. Seems to be the best way for hardware level adjustments.
Click to expand...
Click to collapse
hold that thought!
make BACKUP OF YOUR DRM KEYS FIRST !!!!!!!!!!!
YasuHamed said:
hold that thought!
make BACKUP OF YOUR DRM KEYS FIRST !!!!!!!!!!!
Click to expand...
Click to collapse
Of course, I've always done that (Z2, original Z). :good:
silencer51 said:
Of course, I've always done that (Z2, original Z). :good:
Click to expand...
Click to collapse
best of luck with rooting!
if any help needed plz do let me know
i have rooted E6833 / 6.01
I checked with my Z2 and Z5P also, but in my case, Z2 had more blue tint more than Z5P.
However under my test, they were both max brightness, and Z5P is way brighter than Z2. May be that's why?
Did you adjust both of your screen to MAX brightness or adjusted to around same brightness?
Thanks!

[KCAL]Color Profiles for Pixel XL

This thread will encompass all of the color profiles used by various users of the Pixel XL. Feel free to share your own settings and recommendations here. I will link all profiles in the second post as users post them.
Profiles
XtraArrow: https://forum.xda-developers.com/showpost.php?p=70791467&postcount=3
Nitemare3219: https://forum.xda-developers.com/showpost.php?p=70805924&postcount=8
Kisakuku: https://forum.xda-developers.com/showpost.php?p=70811326&postcount=9
Alcolawl: https://forum.xda-developers.com/showpost.php?p=70823540&postcount=10
I always stay with "Cool" no matter what display, I can't stand the way warm looks. Here are mine.
{
"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"
}
XtraArrow said:
I always stay with "Cool" no matter what display, I can't stand the way warm looks. Here are mine.View attachment 4022019
Click to expand...
Click to collapse
Is that your full profile? No changes to hue, saturation or contrast?
Well, I actually tweak red and green a lot to try find that sweet spot. I don't touch anything other than rgb scale although reducing saturation a little makes it look a little clean.
If anyone really experienced there have made a modification where the sRGB mode could even be improved with KCAL please do share. I like the sRGB mode as it is, but the whitepoint is far from being perfect and when you place it next to iP7 then it becomes more than clear. The default mode should be banished by the way, its the worst I have seen since them early Samsung AMOLED days.
Wish there was a profile which could place our phone near iPhone 7's accuracy/saturation/calibration.
ithehappy said:
If anyone really experienced there have made a modification where the sRGB mode could even be improved with KCAL please do share. I like the sRGB mode as it is, but the whitepoint is far from being perfect and when you place it next to iP7 then it becomes more than clear. The default mode should be banished by the way, its the worst I have seen since them early Samsung AMOLED days.
Wish there was a profile which could place our phone near iPhone 7's accuracy/saturation/calibration.
Click to expand...
Click to collapse
I am sure someone has a setting for this. Just need them to find the thread and reply.
250, 238, 256 is what I use.
You will never match the iPhone 7 display. It is calibrated, at the factory, per display. We can post settings all we want, but each display can look different than another. But sRGB on the Pixel XL has a definite green bias... this helps resolve it, at least in the white balance. With my Pixel XL next to my iPhone 7 Plus, the 7 Plus is still clearly more color accurate sometimes... and other times, they look pretty close. Just turn on sRGB, adjust the white balance to your liking, and leave it alone. That's the best you can do if you want color accuracy. We lack the granular control capability to do a proper calibration, even if you had the equipment, as far as I know.
Nitemare3219 said:
250, 238, 256 is what I use.
Click to expand...
Click to collapse
I use 246, 226, 256 to correct the green tint in sRGB mode.
Lets warm up.
I kind of miss the warmer hue my Nexus 5X had (It was, from a color accuracy standpoint, much more accurate too). The blue tint this screen has is a bit too much for my liking. After playing around for the last day or so I think I've found some settings that I like that reminds me of my N5X display.
I'm sure i'll be tweaking these slightly as time goes on, but I'm happy with what I've got so far:
Red: 235
Green: 247
Blue: 226
Saturation: 30
Value: 132
Contrast: 132
Hue: 0
sRGB: Off
?
Thank you for these profiles, they are good to test with, although every screen will be different coming from the factory. So tweaking might always be necessary.
Still, tweaking from a good base is way better than working from scratch.
Anyone using the default display mode with corrected green tint? What settings are you using?
I'm using 250, 235, 256 currently, through no delicate tweaking.
I don't like any yellowish, greenish profiles. Here are my profile, enjoy ?
Red 195
Green 178
Blue 215
Saturation 25
Value 129
Contrast 129
Hue 5
Sent from my Pixel XL using XDA-Developers Legacy app
How are you guys doing these changes? Found a thread and app on here but need kernel I guess but don't know which. I'm on elementalx.
jjayzx said:
How are you guys doing these changes? Found a thread and app on here but need kernel I guess but don't know which. I'm on elementalx.
Click to expand...
Click to collapse
I use ex kernal manager for tweaking elemental
Sent from my Pixel XL using Tapatalk
tatootie67 said:
I use ex kernal manager for tweaking elemental
Click to expand...
Click to collapse
Didn't know it was in there, guess I'll have to reinstall it. Thanks.
jjayzx said:
Didn't know it was in there, guess I'll have to reinstall it. Thanks.
Click to expand...
Click to collapse
You have to install it from the Play Store: https://play.google.com/store/apps/details?id=flar2.exkernelmanager&hl=en
Is there anyone who knows how to mess with the settings? All I'm interested in is to get the the white really accurate and white. Compared to my HTC 10 the pixel is a bit yellow. Cheers
Sent from my Pixel XL using Tapatalk
Blue305 said:
Is there anyone who knows how to mess with the settings? All I'm interested in is to get the the white really accurate and white. Compared to my HTC 10 the pixel is a bit yellow. Cheers.
Click to expand...
Click to collapse
Are you in sRGB mode? It should be more green, not yellow.

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