yashsingh1/xdaforums huggingface dataset:
[Samsung Galaxy Nexus] eaglesport:
Feel free to critique mine:

From franco's app

Multipliers:

Red 244

Green 283

Blue 353

Red/ green/ blue

-7 / 0 / 10

Gamma

1.6

I like it, obviously. I don't listen to all that, "screen burn in with colors above 200 crap." I like the brighter colors on lower brightness and on my own auto brightness settings rock.

GNEX<3
[Samsung Galaxy Nexus] maddoggin:
My settings are 145, 145, 210 -5, 0, 0 1.2 gamma.
[Samsung Galaxy Nexus] irizwan:
Isn't that Stock :/

Mine

180

180

225

-2,0,2

looks balanced on my screen ... your mileage may vary :P
[Samsung Galaxy Nexus] CADude:
You guys need to compare your phone to a properly calibrated screen while playing the same high quality image or HD video before you can call your settings "balanced".
[Samsung Galaxy Nexus] irizwan:
I believe every AMOLED display is a little different ... what might be Balanced for me might not be balanced for you eg. Blue tint

I know my settings indicate that i've done the blues up too much but that doesn't show that much on my screen.
[Samsung Galaxy Nexus] computerpro3:
There's been a lot of bad suggestions by people in this thread in terms of "accurate" colors. If you just want to calibrate your device to what looks good to you, that's great. But accurate colors are something completely different.

I spent a few hours messing around with HCFR and my Xrite i1d2 meter and came up with quite an accurate calibration. You can actually absolutely nail the colors on this screen - they are visually indistinguishable from perfect reference. The only thing I haven't figured out yet is gamma. It totally sucks no matter what I do - I can't get a flat gamma curve.

Anyway, here's what I came up with using the Franco Kernel app:

Absolutely perfect greyscale:

Pretty much bang on color temp

Once again, quite good

And then gamma sucking the big one:

Despite the gamma, the screen looks a billion times better than before. But the gamma is quite frustrating for watching videos. It's better than stock, but pretty far off.

Here were my settings:

50% brightness

Color Multipliers:

Red: 190

Green: 150

Blue: 180

Gamma:

Red: 8

Green: 0

Blue: 8

OMAP Gamma: 1.2

Some things I noticed:

The three gamma controls affect the low end more than the high. So for example, an adjustment of - or + 1 gamma was a big deal at IRE 30, but not much at IRE 80. The color multipliers were the opposite - they affected IRE 60-90 hugely, but not much down low. I almost used the multiplier and gammas like the classic gain and bias calibration controls on consumer electronics.

Also, color multipliers over 200 DONT DO ANYTHING

. You can jack it up to 350 if you want, but it won't budge even 1% on the meter. The best way to calibrate this screen is to pick your weakest color, and cut down the other two channels to match it.

Unfortunately, what works for me may not work for you as all screens are different. But for my particular device (day 1 preorder, first revision) this is easily, easily, easily the best calibrated cell phone display I've ever seen.
[Samsung Galaxy Nexus] ZeppelinJ0:
Cool information but my screen is extremely RED under these settings, is this on Franco?
[Samsung Galaxy Nexus] annie42:
it depends on devices as well, not all devices have the stock color like each other's

EDIT: yeah it's really red, maybe you meant -8 0 8?
[Samsung Galaxy Nexus] computerpro3:
Yup, this is the unfortunate nature of the beast. Each device is different; really the only way to get reference colors is by measuring your own. It's worth trying different user's calibrated settings to see if it matches yours, but in the end, if it looks off it probably is.
[Samsung Galaxy Nexus] herzzreh:
How much of a pain was it to keep changing colour settings on the device when calibrating?

I barely have enough patience to do it on a non-DDC monitor, can't imagine doing it on a phone.
[Samsung Galaxy Nexus] computerpro3:
It drove me nuts at first until I realized I should use the multitask button :p

Was not bad at all. Had the pattern generator in one app, and the color settings on another app. Only 1 button press to switch between patterns and color settings.
[Samsung Galaxy Nexus] jauhari:
How To Detect which ROM that have

/init.d autorun function

Best Regards

Jauhari
[Samsung Galaxy Nexus] onyx00:
I think he actually meant 8, 0, -8 which looks much better than the opposite. I also have to bump up my screen dim level (on AOKP) to 5 instead of 1. At 1 it went all wacky purple. But I agree, these settings per the poster look really great
[Samsung Galaxy Nexus] ToMaSoo7:
Try this settings:

Color Multipliers:

Red: 198

Green: 210

Blue: 236

Gamma:

Red: -3

Green: 0

Blue: 2

OMAP Gamma: 1.2

Trinity Gamma inferance: -3

Looks really good on my Galaxy Nexus.
[Samsung Galaxy Nexus] emd2009:
This looks really nice thanks!
[Samsung Galaxy Nexus] jkc120:
SGS3 screen is WAY better

My friend got an AT&T SGS3 and we were comparing the screens to see if any of the issues with the Nexus screen were still present. All I have to say is the SGS3 screen is night and day better than the Nexus:

- practically ZERO banding, even at lowest possible brightness

- color remains much more true even at lowest brightness

- no tinting I could detect at all, even at lowest brightness

- played back some videos and it's flawless. No artifacts, no color banding/gradients, no splotches.

The screen is practically indistinguishable from an LCD, except it maintains the deeper blacks.

Looks like Samsung really did tweak the hd samoled process technology for the SGS3 screen. I think I'm going to pick one up, once the dev community situation shakes down and I know if I'll have good dev/ROM support.

Kind of sad looking at the Nexus display now. :(
[Samsung Galaxy Nexus] matthewr87:
I went through 7 GNex phones before I received one with a screen that I deemed acceptable. The amount of variation between the 7 units was astounding. I now think I have an OK screen (with purple tint on the lowest brightness settings). However, it is possible that comparing one of the "better" GNex screens with the SGS3 would yield little difference. Just depends on the unit in question.
[Samsung Galaxy Nexus] jkc120:
I went through 5 myself. Trust me, this one I have now is by far the best of the 5. The tinting and banding/screen-door effect on mine are not visible except at very low brightness. The video artifacts are still very blatant though and I think it's due to the driver (I heard google wrote the driver for the Nexus, while Samsung writes the drivers for the panels for their non-Nexus phones).
[Samsung Galaxy Nexus] nikulogical:
Good information, although your settings made my colours pinkish.

Is there a cheap way to effectively calibrate the screen how you did?
[Samsung Galaxy Nexus] adolfotregosa:
My gamma is "spot on" !

http://xdaforums.com/showpost.php?p=29037317&postcount=1
[Samsung Galaxy Nexus] strumcat:
The "pinkish" tint is likely magenta, which you can eliminate simply by increasing your green color multiplier.

galaxy nexus (gsm) / cm9 / trinity @ 1.4GHz
[Samsung Galaxy Nexus] baonguyen312:
great idea!!!!!!!
[Samsung Galaxy Nexus] barrist:
these settings look good to me..

is the "over 200 causes screen burn" a myth?
[Samsung Galaxy Nexus] kyokeun1234:
No, increasing multipliers do and will burn your screen even quicker.
[Samsung Galaxy Nexus] bsanto9:
Finally got mine thanks to you guys here is my settings looks great and theres no purple tint at all anywhere
[Samsung Galaxy Nexus] ssamuel68:
Is possible to do that with the google stock rom with a rooted galaxy nexus?
[Samsung Galaxy Nexus] 063_XOBX:
You need a custom kernel.
[Samsung Galaxy Nexus] Ev1L4o:
Since I am with trinity can I use the toolbox to edit this stuff ?
[Samsung Galaxy Nexus] Milamber33:
Yes.
[Samsung Galaxy Nexus] DoesntPostAThing:
Thank you, this looks great on my phone. Here's my init.d script in case anyone wants it. Just put it into /system/etc/init.d and change permissions 755, reboot.
[Samsung Galaxy Nexus] creeve4:
Proof??
[Samsung Galaxy Nexus] rrohanjs:
i personally use this, whites feel soft as well as look white not beige to my eyes, plus it doesnt cross the 200 value for safety purposes, please try and let me know how you feel

contrast 0

r 1

g 1

b 1

r 145

g135

b 200
[Samsung Galaxy Nexus] 063_XOBX:
Multipliers that high can't be good for the display.
[Samsung Galaxy Nexus] pav_87:
really? why?
[Samsung Galaxy Nexus] Milamber33:
If you go above the default and then turn your brightness up, you're then pushing the screen above what it's designed for, which can then result in screen burn in.
[Samsung Galaxy Nexus] pav_87:
Thz! I set the franco's settings
[Samsung Galaxy Nexus] tegezan:
How do You guys set contrast with init.d script..?
[Samsung Galaxy Nexus] Milamber33:
Basically it's just make a script with a bunch of 'cat [value] > [location to write to]' lines, I believe. The precise details are dependent on your kernel, there's a couple of different methods in use so ask in your kernel thread.
[Samsung Galaxy Nexus] atir usman butt:
i want nexus 4 display control app,,,,plzzzzzzzz
[Samsung Galaxy Nexus] tluley51:
This may seem like an odd question, but is there anyway to like, refresh the screen? I was on Liquid RC9 with I believe imoseyen's kernal and the screen was very bright and vibrant and I loved it. I just flashed the new Carbon rom and the screen is slightly dimmer (which is fine) but I can see a lot of burn ins from before. It is an eye sore :-/
[Samsung Galaxy Nexus] magozz:
Sorry to say but think you just stuck with burn-in. Burnt one of my nexuses on the same rom with full brightness. Your best bet is call up Verizon for a replacement asap. That's why i don't go above 75% anymore. Most kernels/Kernel app settings lets your phone be vibrate and bright without having to use full brightness so just play it safe from now on.
[Samsung Galaxy Nexus] Langduscher:
So what about multipliers @ 270, 270, 428 & brightness LOW (like 10%).

Liking the colors now, but don't want more burn in than I have now (which becomes really obvious when using expanded desktop).

Cheers
[Samsung Galaxy Nexus] reysonance:
From what I've read, the bluish tint when using the expanded desktop is not a burn-in, but since AMOLED panel doesnt light up any pixel whatsoever when displaying the color black, like the one in the navbar, the blue pixel on the navbar hasn't degrade yet, and since the blue pixel degrade at a much faster rate than the others, the part of the screen that constantly used, meaning everything other than the status bar and the navbar, the blue pixel will emit less light that the unused one, thus the bluish tint on the navbar.

You theoretically can make the bluish tint fade away by using a white navbar instead of the black one, which obiously will degrade it much faster, but I wouldn't overdo it.
[Samsung Galaxy Nexus] Langduscher:
Cheers mate, makes sense. But it's still very noticable :laugh:

Now for my question: how about having the multipliers set high (270, 270, 428) and the brightness LOW.

Is that more harmfull than multipliers set lower (<200), and brightness set higer?
[Samsung Galaxy Nexus] reysonance:
Should be fine, since the reason going over 200 is not recommended is when you set it at full brightness the panel will be be waaay more brighter than stock values, which may stress it and cause burn-in, personally I've been using values over 200 for months now and no sign of burn-in. Although I always set the brightness to be lower than 50%.

But 428 might be overkilling it, isn't the color control interface is limited to 400 anyway, how do you get a number that high?
[Samsung Galaxy Nexus] Langduscher:
Stock settings in iceandfire kernel

CM defaults to highest no. multipliers too.

Brightness is low tho, being good for battery life! Now at 46%, 9h since charged and 3h6m screen on.
[Samsung Galaxy Nexus] tiggerbcn:
As you change the permissions to 755??

I've tried creating an installer in a zip, and adding these lines in the updater-script:

set_perm_recursive(0, 2000, 0755, 0755, "/system/etc/init.d");

set_perm(0, 0, 0755, "/system/etc/init.d");

But I changed everything well, but does not change the multipliers.

Some help???

Thanks
[Samsung Galaxy Nexus] reysonance:
Does running the script manually from terminal emulator change the colors? If so the problem is in the ROM's init.d support. And some kernels have different sysfs path to echo to for the colors (I think, don't quote me on that).
[Samsung Galaxy Nexus] tiggerbcn:
Now I realize that does not change anything, I thought that if, in the log I get tells me, in all lines: Can not create ........... NO such file or directory

The kernel is CM10.1, and supports init.d, I think

I'll try another kernel.

Thanks

PD: As I have the kernel path that I use for the colors?
[Samsung Galaxy Nexus] reysonance:
Yeah, I've never had much luck either with the stock CM kernel, the script does work on franco and lean though. Both has init.d support in their ramdisk too.
[Samsung Galaxy Nexus] tiggerbcn:
I changed the Kernel by AK021 and if that works, with the CM kernel does not work, with Lean worked just changing colors, gamma, but did not change the multipliers.

Well, already I can not use the script with the CM kernel which is what I do best.

Thank you very much for the help
[Samsung Galaxy Nexus] Crwolv:
I beg to differ....more can be done. yes burn in is way possible and ive done it but if you have your gnex set to screen off in under 2 minutes YOUR FINE! these settings are much brighter(and make the people that say awesome amoled cant be seen well in sunlight look STUPID) but whites are more pure than any lcd and I own a lgog and my neighbor an htc1 and my gnex screen killz em both. gamma is at 6, contrast is 16+,r is -4 g is 0 b is +6 and color multipliers are 320/320/400 r/g/b ! PERFECTION. no disrespect meant but these are much brighter /fuller and white and natural but extreme saturated beuaty

)
[Samsung Galaxy Nexus] Zibri:
It would be great to find a way to write it in NVRAM so we won't need a custom kernel/rom.
[Samsung Galaxy Nexus] MS.:
Thanks a lot, now screen looks way better.

Default settings

on Franco kernel gives me terrible blue tint.
[Samsung Galaxy Nexus] atsavlis:
Im running RGB -10, 0, 10

Multiplier 400 400 400

Try it out guys, seem pretty nice to me, and helps allot for viewing during the day.
[Samsung Galaxy Nexus] DarkVasyaK:
For me 200 200 200

-10 0 10

is just fine
[Samsung Galaxy Nexus] kashix:
tried again after reading this, color is way too off as well, my eye is very sharp, often faced with very good display panel and I can see the colors very well. The suggested settings/values are way too off, franco's recommended values are much better but no offense, thanks for your effort!
[Samsung Galaxy Nexus] barrist:
aren't there going to be alot of variations in screens so there wouldn't be one set of 'perfect' settings for all?
[Samsung Galaxy Nexus] Enhanced:
That's exactly it. The variations in screens will mean that there will never be a "one size fits all" setting for the offsets and multipliers. I've had 3 GNs and all 3 have had different tints on it's screens.

Thus, it's better to take this as a guide and then tweak to your screen's needs. Personally, I only change the multiplier value and have it at "230... 230... 270...". Makes my stock yellowish tint disappear and I now have a whiter display.
[Samsung Galaxy Nexus] andrewlax120:
can someone help me out?

i go to etc/init.d then i click new folder and name it 900colorcontrol-b50 (so etc/init.d/900colorcontrol-b50)

when i go to long press it in root explorer i do not get the "open with" options to select text editor

what am i doing wrong?

if it helps, im on franco 13.1, should i upgrade for this to work? and couldn't i just type the echo commands into terminal for multiplier values each boot?

a more in depth guide would be very helpful, i would love to be able to set at boot,

sorry im new to having an unlocked bootloader, came from a droid x

thanks
[Samsung Galaxy Nexus] nfin1te:
I'm sorry, but this is not entirely right.

Your recommended settings are correct for srgb as rgb working space - srgb however has a relatively low gamut compared to adobergb and ecirgbv2. Also, srgb should only be used by web designers, as it is also the native mode of every computer display. Photographers should use adobergb (native dslr color space) or ecirgbv2 (f.e. prepress retouching).

here are the official calibration targets for each color space:

srgb

Gamma 2.2

Color temp 6500k

Whitepoint 140cd

AdobeRGB

Gamma 2.2

Color temp 6500k

Whitepoint 120cd

eciRGBv2:

Gamma L*

Color Temp 5000k

Whitepoint 120cd

None of these settings are good for practical use tho (in prepress at least).

For best color accuracy, I recommend a color temp around 5700-5800k, 140cd and L* or 2.2 gamma, depending on your rgb working space (adobe or ecirgbv2).

photographers should use ecirgbv2 or adobergb, depending on what kind of work he or she does. ecirgbv2 is best suited for prepress use, as it offers the best color conversions to ISOCoatedv2.

General note:

whitepoint should always be adjusted to look like a white sheet of paper of your favorite photo paper.

color temp should always match the grade of white of your fav photo paper (bleached paper f.e. has a higher white point as yellow natural paper)

hth
[Samsung Galaxy Nexus] MS.:
Yes i can :)

1. Connect your phone to PC

2. Download and extract attached .rar file

3. Open extracted folder and double click on "FixNexusGamma.bat".

PS. make sure you have enabled "USB Debugging" (go to Settings->Developer options to double check).

PSS. This and OP's guide won't work on ROM's that has no init.d script autorun function!
[Samsung Galaxy Nexus] andrewlax120:
thanks man!
[Samsung Galaxy Nexus] MS.:
You're welcome.
[Samsung Galaxy Nexus] mailman64:
Thank you for making this so simple.
[Samsung Galaxy Nexus] heo_con184:
May I use this tweak with PopCorn Kernel from sonicxml ?

http://xdaforums.com/showthread.php?t=1508068

Thanks
[Samsung Galaxy Nexus] FatherD:
After 'applying' this mod, I checked the relevant files in colorcontrol and they appear to have the default values in them! Does this mean the mod is not being applied, or does it in some way bypass the files and apply the values anyway?
[Samsung Galaxy Nexus] bradm23:
I tried the recommended settings in the first post and the screen looks pretty nice. I was very intrigued when color control was released and couldn't wait until someone used their HDTV calibration sensors on the phone.

The only thing is now contacts looks a little blue when before they were grey. Can someone confirm the color of the contacts list (click phone and scroll though either recent calls or contacts). The top is still a nice inky black but the contact labels look blue now when before they looked dark grey
[Samsung Galaxy Nexus] dmmarck:
So any suggestions for the Nexus? These settings didn't work for me, but Francos look decent.
[Samsung Galaxy Nexus] lhurtado:
This may be an effect of the pentile array. I remember some gray images that looks colorful in nexus one due pentile.
[Samsung Galaxy Nexus] atoyu:
use i1 display 2 not good for this omled device.the device color space all over aRGB.

better use color munki or i1 pro, and get a average data with at least 3 device when you share to public.

any one know android can load icc profile???i only know iOS can use spyder software do.
[Samsung Galaxy Nexus] Jayrod1980:
My problem is more that colors are OK for the most part but the grey scale is off and everything looks grainy and flat. My dads nexus I set up for him has a bit greener screen but the settings screen color transition is much smoother looking and colors are not flat and grainy. My color scale transition is not smooth and I can visibly see the greys as bars. Its almost like playing a video game and raising gamma in game too high. It washes everything out.

Can I use the bat file without using a color control kernel?
[Samsung Galaxy Nexus] heo_con184:
I don't think you can.

The .bat file is just one-click-changing option.
[Samsung Galaxy Nexus] MS.:
Nope, you'll definitely need kernel that supports color control. And that .bat script isn't magick, it just does everything what says OP automatically :-)

Edit. Ahh, heo_con184 beat me to it.
[Samsung Galaxy Nexus] irishrally:
I prefer the less accurate, more titillating, 200 ... 200 ... 230 ...
[Samsung Galaxy Nexus] acatabian:
sorry for asking such a noob question, i have no clue what to do when it comes to developing and stuff like this.

but i run that .bat file in terminal correct? and it should do everything by itself?
[Samsung Galaxy Nexus] MS.:
Nope, just double click that file ;-) Terminal will open automatically.
[Samsung Galaxy Nexus] FatherD:
ok .. this mod just isn't working in any way for me, even tried using 200.. 200.. 100.. to see if I could get any noticeable results, compared a reference white page on an iphone 4s, whichever settings I used the Nexus displayed exactly the same slightly bluer white than the iphone (which looks a very natural full white!)

Running Mcr Ir11 / franco 18.4

Any ideas anyone?

edit: having a go with franco's kernel updater ..

edit2: hmmm the values did not survive a reboot properly in the kernel updater app, the colour values all default back to 200, the colour gamma does stick tho! the best I can come up with to remove the green/blue dominance is -2,0,2 to my eyes, on my screen at 35% brightness, this results in a pleasing balance of strong natural whites, no dominant hues.

edit3: oops make that 2,0,-2 this knocks out most of the over-bearing blue/green in whites and greys :)
[Samsung Galaxy Nexus] MS.:
Seems like your current ROM doesn't support init.d script autoruns, that's one of requirements for this mod. I'm on CM9 and it's original kernel, so i can't test this mod either. I just use OP's suggested RGB values.
[Samsung Galaxy Nexus] hsmade:
A quick tip: Set brightness to 50%. Open up your browser. Open a blank page or google. Get a sheet of white paper. Cover half the page with the sheet and compare the color.

*Remember that the perceived color changes with the light that falls on the object.

*Every screen has it's own properties and native color. So there's no way to give any 'perfect setting' for all screens. You'll have to find your own.
[Samsung Galaxy Nexus] FatherD:
I think that could be the reason, but how come the gamma/oc/uv and other init.d values stick, but the multiplier values don't? can't figure out how it would allow autorun of overclocking, but not colour values!? - I will ask Paul over at Modaco if this is related to the Rom build - many thanks for your help here :)

---------- Post added at 11:23 PM ---------- Previous post was at 11:21 PM ----------

That's exectly it! - I messed around for some time with the gamma values and got mine looking natural and vibrant, it has to be on a device by device case.
[Samsung Galaxy Nexus] ArmanUV:
Tell me if I got the right: if all the values are increased by a percentage (10% for example), then the colours will be the same and the brightness will increase?

If that's correct, can people use this for fixing (aggressive low) autobrightness ?
[Samsung Galaxy Nexus] FatherD:
I have increased the gamma values, while keeping them relative (still reviewing which are best) and I think it dies up the brightness at any given level!
[Samsung Galaxy Nexus] heo_con184:
Can someone please confirm for me : is this a typo in the 1st post ?

-10 0 -10 or -10 0 10 ?

Anyway, how can I revert to stock then ?

Thanks
[Samsung Galaxy Nexus] FatherD:
That has to be a typo, the last number is blue, that low a value would result in a very green bias!
[Samsung Galaxy Nexus] FatherD:
I am getting good balanced colours across the brightness range with: multiplier set to 200, 200, 200 and the gamma set to 2, 0, 3. This seems to get rid of any green problems without boosting the Blue. I tried all manner of settings, dropping the green below 0 results in a complete green-out at low brightness, anything near the default values look too blue to me across the brightness range. Pushing any of the values too far results in odd effects, like a red bias at low brightness with a blue bias at high!