Does anyone know if there are any working ways to adjust color temperature? I think most methods require a modified surfaceflinger library. My screen is sickeningly bluish green.
Thanks.
ffolkes said:
Does anyone know if there are any working ways to adjust color temperature? I think most methods require a modified surfaceflinger library. My screen is sickeningly bluish green.
Thanks.
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Sounds like a bad screen. I'd take it back. Mine is very balanced. Super saturated but very balanced.
Sent from my SPH-D710 using XDA App
I agree, my first one had a bad screen and a dead pixel right in the center, the screen quality on my new one is better all around and I wasn't even expecting there to be an improvement
Thanks for the suggestions, but the other ones I've seen don't look any better in terms of their greenish-blue color cast. I've read it's typical of AMOLED displays. I just want a way to adjust white balance like CM has.
...and I've discovered the answer. Chainfire3D's Pro version has support for Custom color "nightvision mode". Basically, exactly what I wanted. It works perfectly! Do yourself a favor and get this and drop your green and blue levels down a tiny bit.
You just saved me a two hour drive to get a new phone. Great find.
So, anybody else have a chance to hold two E4GT's side by side? My wife and I are both trialing units, and mine has a much more pronounced bluish tint. I remember reading something about variability with Super AMOLED Plus screens, but the significance of the difference surprised me.
It's not that either one is so much better or worse, but they sure are different...
wynand32 said:
So, anybody else have a chance to hold two E4GT's side by side? My wife and I are both trialing units, and mine has a much more pronounced bluish tint. I remember reading something about variability with Super AMOLED Plus screens, but the significance of the difference surprised me.
It's not that either one is so much better or worse, but they sure are different...
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Settings>Display>Screen Mode. One of you could have messed with that setting. There are three basic settings that change the picture settings on the phone. Dynamic, Standard, and Movie.
I remember reading from someone who calibrates screen colors who tested this phone.
When new, screen has green tint as it ages it gets blue tint , movie setting has the most neutral colors.
My screen has green tint you only notice it when comparing another phone LCD or with HDMI on your tv
Edit I forgot I noticed my pictures have a green tint but that problem bad white balance ,compare a picture or the same screen with another good phone et4g has green tint in pictures too
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Actually yes. My buddy has one too. Our screen settings are the same. Set with the same settings, and same wallpaper, his blacks are deeper and more defined and colors much robust. Both screens set to standard under display type
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Have had this phone for a few days and am adjusting to LCD again after a long stint with SAMOLED+.
The colors on the Optimus look a bit muted to me, and dark grays aren't quite as deep as I prefer them. No doubt I'm just used to OLED. Is there a way to calibrate/adjust the color or even the gamma level? I don't know of an app that does it. Some ROMs have this feature.
Also, anyone know what the color gamut on this LG is? I hope that it's not low color gamut like the iP4, but it doesn't appear to be (hard to say, different OS).
I'm the only one who wants to color calibrate his display?
Is there a script available similar to this for the Galaxy Nexus? http://forum.xda-developers.com/showthread.php?t=1521195
Even pentile matrix users want a color calibrated display!
I obviously can't speak for all users, but I've been completely happy with the color reproduction of the Nitro display. In fact, I'd say this is the best display I've ever used on a mobile phone. AMOLED's tend to be over saturated according to the experts whereas this screen scores really high in all tests of quality. Minus the HTC One X, we probably have the best display out there.
Out of the box, SAMOLED+ displays are horribly inaccurate and far too sharp, but after calibration (especially under 4.0+), colors can look quite accurate yet pleasing.
I'm not expecting this IPS display or any LCD to match OLED for black levels, but I believe that the Optimus' display, with some minor tweaking, can be better than it is right now. On LCDs, I prefer to turn up the backlight, turn down brightness, crank up contrast, and lower gamma: this creates very deep blacks and amazing contrast. Dark greys and minor details are slightly crushed, but this is a compromise that I'm willing to make.
Is there a script to lower the gamma level on the Optimus? I don't even need to do anything with the colors, though of course proper calibration would be nice too.
So, the other day I purchased a Datacolor Spyder 4 Pro screen calibrator. Being a photographer I want all my (primary) displays to look as natural and true to what my eye sees as possible.
So I decided to try calibrating my Gnex screen. I don't know any good way of doing this so I had to improvise, what I did is I first took screenshots of the entire calibration process and came to the conclusion that it simply shows 5 images: one solid white, black, red, green and blue image and measures it to define the accuracy of the uncalibrated screen. Then having told the calibration software that the screen has built in RGB sliders (the gnex doesn't I know, but I ticked the option anyway, you'll understand soon why) it then gives me a screen where it measures from a solid white image how much bias there is in either of the channels (red, green and blue) and gives a clear diagram overview, the objective is to adjust the RGB sliders of the monitor to make the 3 bars align (thus having no bias/tint in either channel for a natural reproduction). What I did here is that I used the color control feature available in various custom kernels (I'm using franco) and adjusted the color multipliers until' I my calibrator reported it being even and natural. I also used the RGB Gamma for some minor fine tuning.
I returned to the home screen and WOW, it's looks better than ever, grays are perfectly natural with NO GREENISH, CYAN OR PURPLE TINTS anywhere! Whites aren't perfect, leaning more toward a bright light gray, but worth noting I'm having only 31% screen brightness and I'm not sure if AMOLED can achieve a pure bright white image without a ton of cyan bias.
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Tl;dr
Long story short, I got an hardware screen calibrator and used it to assist me get the most natural values with the color control in franco's kernel and it just pure amazing with none of the tints that the gnex is known for having.
My final values:
NOTE: These values may or may not look good for you, every AMOLED screen is different and needs different settings, these are simply the settings that worked for me, what's best for your device might be completely different!
Multipliers: 233 175 210
RGB Gamma: 1 0 1
Trinity contrast: 0
OMAP gamma: 1.0/disabled
Are the multipliers in order as RGB? Because these settings just make my screen look orangey
First thing, thank you for post:good:, i had looked for somebody to do a true calibration ever since i bought my gnex, having been spoiled before by my nexus s slcd screen, which was an excellent batch, so moving to the SAMOLED HD, for me, wasn't as great as i had hoped.
Still even after trying all the presets and fine tuning it still is slightly off.. (annoying thing with these screens not being all the same and being so different on quality, so you can't simply just input the color values and get the same result).
Anyway i like your numbers, they look pretty god on my screen.
Off topic: I'm probably wrong, but i think read somewhere that going over 200 on the color multipliers was supposed to make the screen more susceptible to burn in?
nitsua98 said:
Are the multipliers in order as RGB? Because these settings just make my screen look orangey
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Thanks for the reply. They should be in order indeed. Note that every display is different so it may not be what's best for your individual device. Additionally, AMOLED screens I believe is said to wear/fade quite quickly compared to LCD with use and also due to the way the actual panel works in our screens each color channel will fade with different pace, effectively leading to unbalanced colors based on what you view on it; For example if you view a lot of red colors, the reds will start fading and thus everything will look a tad cyan-tinted. Finally there may be a difference in the kernel you use and the version of that kernel.
Simply put, unfortunately it's not guaranteed that what looks best for everyone else as each screen is different.
Oh, another thing I noticed; Screen brightness actually affects the color balance pretty largely. Higher brightness means less greens and more reds/blues.
VirgilO said:
First thing, thank you for post:good:, i had looked for somebody to do a true calibration ever since i bought my gnex, having been spoiled before by my nexus s slcd screen, which was an excellent batch, so moving to the SAMOLED HD, for me, wasn't as great as i had hoped.
Still even after trying all the presets and fine tuning it still is slightly off.. (annoying thing with these screens not being all the same and being so different on quality, so you can't simply just input the color values and get the same result).
Anyway i like your numbers, they look pretty god on my screen.
Off topic: I'm probably wrong, but i think read somewhere that going over 200 on the color multipliers was supposed to make the screen more susceptible to burn in?
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And thanks to you for your reply. I actually believe I've heard someone that had used hardware to measure up the best settings for a natural 6500K color balance, but as I replied above, each screen is different and thus they were slightly too much on the blue/cyan end for me. To be honest, most settings I've tried that others have claimed to look great have always been too much green or too much blue. I've tried to adjust after my own eyes and gotten pretty close to what I believe to be good colors but always there is some kind of flaw, so I'm quite surprised to be honest I was able to get such a good overall result.
As for the color multipliers, I've heard it too but I have never seen anyone confirm it, so I'd call it off as a rumor. The burn-ins I've seen using values around 150-200 previously only apply to bright contrast colors and fades away within 2-3 seconds at most and 31% screen brightness is rather low I'd say.
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On another note.. I just want to add that this isn't necessarily a full calibration but just an attempt to reach the most balanced color values. When it comes to gamma and contrast however I'm not sure it's really possible to mimic that of an LCD screen due to the way AMOLED handles blacks and produces very vibrant colors.
Timmyfoxeh said:
Thanks for the reply. They should be in order indeed. Note that every display is different so it may not be what's best for your individual device. Additionally, AMOLED screens I believe is said to wear/fade quite quickly compared to LCD with use and also due to the way the actual panel works in our screens each color channel will fade with different pace, effectively leading to unbalanced colors based on what you view on it; For example if you view a lot of red colors, the reds will start fading and thus everything will look a tad cyan-tinted. Finally there may be a difference in the kernel you use and the version of that kernel.
Simply put, unfortunately it's not guaranteed that what looks best for everyone else as each screen is different.
Oh, another thing I noticed; Screen brightness actually affects the color balance pretty largely. Higher brightness means less greens and more reds/blues.
And thanks to you for your reply. I actually believe I've heard someone that had used hardware to measure up the best settings for a natural 6500K color balance, but as I replied above, each screen is different and thus they were slightly too much on the blue/cyan end for me. To be honest, most settings I've tried that others have claimed to look great have always been too much green or too much blue. I've tried to adjust after my own eyes and gotten pretty close to what I believe to be good colors but always there is some kind of flaw, so I'm quite surprised to be honest I was able to get such a good overall result.
As for the color multipliers, I've heard it too but I have never seen anyone confirm it, so I'd call it off as a rumor. The burn-ins I've seen using values around 150-200 previously only apply to bright contrast colors and fades away within 2-3 seconds at most and 31% screen brightness is rather low I'd say.
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On another note.. I just want to add that this isn't necessarily a full calibration but just an attempt to reach the most balanced color values. When it comes to gamma and contrast however I'm not sure it's really possible to mimic that of an LCD screen due to the way AMOLED handles blacks and produces very vibrant colors.
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Actually deterioration is a problem with normal AMOLED screens. Samsung uses PenTile configuration to mitigate that in the SAMOLED and SAMOLED Plus variants. More info in the following interview with a Samsung engineer:
http://www.mobileburn.com/19548/new...ed-displays-last-longer-thats-why-we-use-them
I put in these values using the Trickster app and my screen looked absolutely rubbish. There is no option to enable/disable Omap gamma in trickster, could that be the reason for the bad colors?
Screenshot please
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Justinhopaolo said:
Screenshot please
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Face meet palm...
Why would the settings on his device be shown in a screen shot that you're viewing on yours?
its looks like cyan effect for photo on my screen..:/
063_XOBX said:
Face meet palm...
Why would the settings on his device be shown in a screen shot that you're viewing on yours?
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Ummm.. Before and after?? Captain perfect
Sent from my Galaxy Nexus using xda premium
This works very well on my phone, but I change the omap gamma to 6
Thank you again :thumbup:
---------- Post added at 04:05 AM ---------- Previous post was at 03:51 AM ----------
Justinhopaolo said:
Ummm.. Before and after?? Captain perfect
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He's right, smartass, the screen shot is just the source of color, no matter how you calibrate your screen, every screen shot looks the same on other devices. We can only notice with real eyes contact.
Justinhopaolo said:
Ummm.. Before and after?? Captain perfect
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That makes as much sense as taking screenshots of different brightness levels.
Justinhopaolo said:
Ummm.. Before and after?? Captain perfect
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You must be a genius. Never heard anyone call somebody "Captain perfect" either. Pretty crappy insult.
Glad to see some people have enough sense to realize screenshots are software rendered though.
063_XOBX said:
Face meet palm...
Why would the settings on his device be shown in a screen shot that you're viewing on yours?
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You knew this was going to happen lol.
Sent from my Galaxy Nexus using Tapatalk 2
AbhishekS said:
I put in these values using the Trickster app and my screen looked absolutely rubbish. There is no option to enable/disable Omap gamma in trickster, could that be the reason for the bad colors?
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Every screen is different, what looks good for me might look rubbish for you unfortunately :/
Also because someone asked for a before/after...
Now this will be highly unscientific and hard to reproduce but here's a before/after example (clicky for larger image):
Also advised you look at it with a good desktop monitor, and bear in mind that cameras are not perfect in any way so even if the camera settings used were identical and white balance set to match as closely as possible, it may not look to you as significant in terms of differences than it is to my eye. Nonetheless I can certainly see a difference especially in the gray and white tones.
The before example is not the stock kernel but simply the reference settings of all multipliers set to 200 and RGB gamma all set to 0. I believe this should be fairly similar to what stock kernel shows.
Still looks orangeish to me so I lowered red down to 220. But thanks anyways. I always love testing these.
A screenshot won't show screen adjustments...
Justinhopaolo said:
Ummm.. Before and after?? Captain perfect
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Sent from my Galaxy Nexus using Tapatalk HD
You had a green tint before u changed it. I can that in the Google Search bar.
And what's funny is the color u recommended are extremely similar to mine lol.
*Multiplier*
Red: 235
Green: 170
Blue:206
*RGB Gamma*
Red: 4
Green: 0
Blue: 2
Trinity: 0
Omap:1
But yeah I had a very greenish tint in my screen. Made my keyboard look brown before I rooted. =|
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If I have helped you.... hit that sexy thanks button. ^_^
Justinhopaolo said:
Screenshot please
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Amazing. Just amazing. Can't believe we still have people who say things like this.
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after looks better imo
Excuse the n00bity, but could someone explain what the flashing the Perseus does as far as color calibration goes? It does say the color calibration is better than iPhone - so how does it work? Does it look more "natural" in natural mode? Would I notice much difference (barring resolution and brightness) when it comes to color reproduction compared to other LCD devices?
......
tuxonhtc said:
Excuse the n00bity, but could someone explain what the flashing the Perseus does as far as color calibration goes? It does say the color calibration is better than iPhone - so how does it work? Does it look more "natural" in natural mode? Would I notice much difference (barring resolution and brightness) when it comes to color reproduction compared to other LCD devices?
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I don't understand nothing ...What do you mean?The screen is much better than iFail's
Flash perseus, and you get much true colors than saturated ones that comes with s-amoled. If you haven't noticed, there's a slight green-ish tint to the white, which you can get rid of. And obviously you can tweak the calibrations to set the screen to make adjustments that suits you. You'll lose the screen modes, though.
Lots of audio enhancements and stuff like that too. Really a must flash IMHO.
tuxonhtc said:
Excuse the n00bity, but could someone explain what the flashing the Perseus does as far as color calibration goes? It does say the color calibration is better than iPhone - so how does it work? Does it look more "natural" in natural mode? Would I notice much difference (barring resolution and brightness) when it comes to color reproduction compared to other LCD devices?
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basically perseus rom comes with an app called 's tweaks.' under display settings within this app you can enable something called 'master sequence.' you can toggle it on and off instantly without rebooting. the effect of it is that you get more 'realistic' and natural colors and not the bright saturated colors you would get using amoled samsung phones normally.
i personally prefer the bright saturated colors but the only way you will know is by trying it out for yourself.