Both reviews and measurements have shown the HTC One to have a cold color temperature. This is something that should be correctable in software. Do custom ROMs ever include improvements to color temperature?
You'll have to wait until custom kernels are developed and have the screen calibration feature implemented.
clbell said:
Both reviews and measurements have shown the HTC One to have a cold color temperature. This is something that should be correctable in software. Do custom ROMs ever include improvements to color temperature?
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What do you mean by color temperature. My physics background is messing with me here and I have seen some reviews and mention great color reproduction. So can you describe what you mean?
bobruels44 said:
What do you mean by color temperature. My physics background is messing with me here and I have seen some reviews and mention great color reproduction. So can you describe what you mean?
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he may mean that screen is not 6500k
cihanleanne said:
he may mean that screen is not 6500k
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Yes, whites are 7800 Kelvin on the HTC One which is pretty cold. I believe it was done purposely to make it look brighter. Daylight is 5500-6500 Kelvin and 6500 is about the temperature of an overcast sky. Colors should be a bit more accurate if the temp is lowered closer to daylight. It should be easy to fix, someone just has to do it.
There is actually a spec for that. Look up CIE D65. Can't post a link since I'm new here.
bobruels44 said:
What do you mean by color temperature. My physics background is messing with me here and I have seen some reviews and mention great color reproduction. So can you describe what you mean?
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Colour temperature is one of the measures of the colours a screen produces. If you set a particular pixel to be red 255, green 255, blue 255 the question then is, how much actual red, green and blue light is that pixel emitting? Different screens will produce different relative amounts; so, while you're telling the screen "white, please!" in each case, what you actually see varies from display to display.
Strictly speaking, the more useful measure here is "white-point". There is an internationally-agreed standard for display devices (e.g. televisions and monitors) called D65 which defines the exact ratios of red, green and blue that white is supposed to contain.
(I'm saying "white" here, but the same applies to any other point on the "greyscale" - that is where the logical red, green and blue values are all equal. So a pixel that is red 67, green 67, blue 67 should have the same ratio of red, green and blue light as a white pixel).
"Colour temperature" is a less precise way of measuring white point - it ignores the green component, and looks only at the relative amounts of red and blue light (so a screen can have the correct colour temperature but still be too purple or too green). Colour temperature is measured in Kelvins, and says that the balance of red to blue light is the same as would be emitted by a black-body at that temperature. D65 is approximately equivalent to a colour temperature of 6500K, and people measuring white/grey accuracy tend to measure colour temperature rather than white point, because there is no easy way of writing down a white point as a single number.
So, if a display has a colour temperature of 7800K, that means that a white or grey pixel is emitting too much blue light and not enough red.
The terminology is made more complicated by the fact that when people talk about adjusting the "white balance" or "colour balance" of the screen, they usually use the word "cool" to mean "more blue" and "warm" to mean "more red", which is obviously the opposite of what the colour temperature value is doing - a higher colour temperature means the display is more blue.
My own HTC One has a white-point that is visibly pushed towards the blue, and a couple of reviews have noted this: one at tweakers.net and one at uk.hardware.info ; but relatively few reviewers bother to measure colour temperature, and there have also been one or two contradictory reviews, notably one at computerbase.de.
A larger number of reviews measure maximum screen brightness, and most of those seem to come up with numbers somewhere around either 385 or 485 cd/m-2 but with nothing much in between those values. This suggests HTC may be using at least two different displays on different One handsets. If they are, it's possible there may be differences in white-point as well... but evidence for that is still mostly speculative.
Did anyone figure out how to make an adjustments to color profile on HTC One?
I have 2 HTC One's and one of them has nice cool bluish screen, and another one became much warmer (yellowish) after the firmware upgrade. And that drives me nuts, as that colder look is what I really love about HTC's screen
Phone is rooted and runs custom rom if that matters. Please share your knowledge if anyone know how to make the adjustments.
Hi guys, do you find your Xperia Z's white notification LED look closer to purple or pink? Surprises me when I saw my whatsapp notification light as pink.
mengsuan said:
Hi guys, do you find your Xperia Z's white notification LED look closer to purple or pink? Surprises me when I saw my whatsapp notification light as pink.
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Yup thought the same thing.
Sent from my C6603 using xda app-developers app
I think XZ uses a multicoloured rgb led - they can't produce real white light, instead they just light up all three of them resulting in white/pink light.
Thanks for the quick replies. I'm now assured my phone isn't unusual
Resource exists to calibrate the colors of the Moto X 2014 screen?
Leave the most accurate colors, such as white IPS Display. There is possibility? With which resource?
I thank for the help.
I am sure a future modified kernel will allow for color calibration.
knitler said:
I am sure a future modified kernel will allow for color calibration.
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Is this right?
I did not see this possibility in Moto X 2013.
Andreqkz said:
Is this right?
I did not see this possibility in Moto X 2013.
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Moto X never really got a whole lot of dev support like most Flagships so probably just no one cared to do it.
Sorry for reviving a thread, but I am quite interested in this subjust considering my screen has the yellow tint. I think out best hope is that faux already has a github branch opened for creating a kernel for our device which most likely will support screen calibration like his kernel for other devices, I also believe he has an app on the play store for doing so for devices that support it.
If you search for screen adjuster in the play store, you will see several apps that can adjust tint, white balance, etc. Not as good as if you were able to do at the kernel level, but...
Any developer interested in creating this resource?
The screen colors " Moto X " are horrible When I compare with other models: Galaxy S5, LG G2, Sony Z3 / Compact...
Andreqkz said:
Any developer interested in creating this resource?
The screen colors " Moto X " are horrible When I compare with other models: Galaxy S5, LG G2, Sony Z3 / Compact...
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I use CF Lumen to fix the colors. Works pretty well. I adjusted the color temp so whites are actually white now.
But it is the same thing as a kernel with this feature?
Have you used Color Control in a Kernel on another smartphone? It works the same way with this CF Lumen application?
Andreqkz said:
But it is the same thing as a kernel with this feature?
Have you used Color Control in a Kernel on another smartphone? It works the same way with this CF Lumen application?
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No. But it helps.
_MetalHead_ said:
I use CF Lumen to fix the colors. Works pretty well. I adjusted the color temp so whites are actually white now.
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Wow. Good find! This is the ONLY app I have found that actually *decrease* RGB channel levels with respect to base levels. All other apps only increase levels. By increasing channels, you wind up removing those inky black on AMOLED screens. So, when your brightness levels increase, the blackness takes on the color of the increased color channel, which of course is bad.
I do question your method of removing the yellowish whites of the Moto X. The color temp adjuster slid all the way to the right at 6500 is essentially no filter at all, as its the default color temp. Moving it to the left warms up the white balance, but doesn't result in whiter whites. What I found to improve whiteness was to keep the white balance at 6500, but in the color channels, reduce both RED and GREEN channels to 0.949 and 0.937, respectively. I just keep these settings around the clock and don't make use of all the other filters.
So, this is the only app that I've found where you can maintain your inky blacks while actually *raising* the color temp, or at least raise BLUE levels with respect to the other 2 channels.
floepie said:
Wow. Good find! This is the ONLY app I have found that actually *decrease* RGB channel levels with respect to base levels. All other apps only increase levels. By increasing channels, you wind up removing those inky black on AMOLED screens. So, when your brightness levels increase, the blackness takes on the color of the increased color channel, which of course is bad.
I do question your method of removing the yellowish whites of the Moto X. The color temp adjuster slid all the way to the right at 6500 is essentially no filter at all, as its the default color temp. Moving it to the left warms up the white balance, but doesn't result in whiter whites. What I found to improve whiteness was to keep the white balance at 6500, but in the color channels, reduce both RED and GREEN channels to 0.949 and 0.937, respectively. I just keep these settings around the clock and don't make use of all the other filters.
So, this is the only app that I've found where you can maintain your inky blacks while actually *raising* the color temp, or at least raise BLUE levels with respect to the other 2 channels.
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I misspoke, I didn't mean color temp. I adjusted the master filter, decreased red and green like you said you did. And same here, that setting stays permanently without anything else. It makes a HUGE difference, my screen is gorgeous now. I'm glad you found as much success with it as I did
Thanks @_MetalHead_ for mentioning CF Lumen. This works so much better than Screen Adjuster Pro (I had been using that until now).
sha_tan said:
Thanks @_MetalHead_ for mentioning CF Lumen. This works so much better than Screen Adjuster Pro (I had been using that until now).
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No prob happy to help!
What Motorola should do is offer screen modes, like samsung does
Chad_Petree said:
What Motorola should do is offer screen modes, like samsung does
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Try CF Lumen. It works wonders.
CF.Lumen has the nasty habit of applying its filters twice when rotating the phone and on the recent-apps screen. So if I calibrate my screen to look just nice, I get a blue tint on those occasions. So I'm constantly reminded of this workaround solution.
I'd rather stick with the yellow tint, trying to get used to it and still hope for a custom kernel to adjust the colors on hardware level. But it looks like nobody is interested in developing for the Moto X 2014... :crying:
mcg33 said:
CF.Lumen has the nasty habit of applying its filters twice when rotating the phone and on the recent-apps screen. So if I calibrate my screen to look just nice, I get a blue tint on those occasions. So I'm constantly reminded of this workaround solution.
I'd rather stick with the yellow tint, trying to get used to it and still hope for a custom kernel to adjust the colors on hardware level. But it looks like nobody is interested in developing for the Moto X 2014... :crying:
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Weird, I don't have that issue at all.
Sent from my iPhone 6 using Tapatalk
It's not an issue, it's just how the app works.
Chainfire himself confirms it in his thread about CF.Lumen:
http://forum.xda-developers.com/showpost.php?p=51827433&postcount=74
It might be less noticeable if your filter settings are very low.
Everybody talks about removing the yellow tint, but what about toning down the saturation? I find it ridiculously fake, the google music app and tapatalk app look so cartoony with the stock saturation, could I tone it down with cf lumen?
Hello everyone ,i recently got a z3+ and i noticed that the black levels of the screen are pretty bad...coming from an oled display i was expecting some diffrence but not that bad...I watched some movies and in the dark scenes it is very difficult to see the picture ,everything looks the same and you cant really see the characters or the background ..its a mess especially in daylight conditions its almost unviewable.Cranking the brightness all the way up helps a lot -again in very good lighting enviroments/outside/daylight i cant see a thing in dark scenes- but then the black levels are too bad almost grey not black..
I also had a z1 compact which i dont think it was that bad, i'll try to test them side by side...
So i was wondering if a have faulty screen or something but i would like to hear your experience ...
Overall its nice screen bright with nice colours etc..but the black levels are a dissapointment in movies/videos..
Also i have disabled all screen enchanments (x-reality etc) and my white calibration is 178/162/37 RGB
Based on this review i was expecting more...
Blacks are pretty good in my opinion contrast ratio is brilliant for a ips. But this may come from you're eyes trained to a OLED screen. It's like my TV I have a lg OLED in the living room but a led in the bedroom and now I'm seeing grey instead of black :silly:
LMcR92 said:
Blacks are pretty good in my opinion contrast ratio is brilliant for a ips. But this may come from you're eyes trained to a OLED screen. It's like my TV I have a lg OLED in the living room but a led in the bedroom and now I'm seeing grey instead of black :silly:
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Here are some photos of my screen's blacks ...taken at 100% brightness in a 100% dark room ,all screen enchanments off, showing the same black level block picture in all 4 photos...i tried to adjust the camera exposure to make it look as close as what i was seeing ...as you can see it actualy can lit the desk under it and there is massive light bleed (if thats the correct term) out of the 4 corners in low viewing angles ,it actually creates a shape of X of light in a surface...Thats all please try it too to check out your results so as to know if i have problematic screen...
So how's your screen uniformity on dark greys? Try opening the calculator app in night mode and change your brightness from 0 to 100 slowly. Do you notice any colour shifts?
Can confirm that! Weird stuff indeed..
A70 have green tint problem on pure white [emoji2962]
Sent from my SM-A705FN using Tapatalk
Software problem I think.
marko1999 said:
A70 have green tint problem on pure white [emoji2962]
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Mine does not have a green tint.
hexxr said:
Software problem I think.
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No it's how amoled works. Some phones are better and some are worse. Samsung should've used pure blacks on their night mode knowing that amoleds cannot display dark greys properly.