We need to know in what reading (white balance/grayscale, gamut, or primaries luminance) showed the greens slightly off. If it is the white balance/grayscale, then yes, doing what you did is the right procedure.
-
Our native mobile app has a new name: Fora Communities. Learn more.
Color Temperature help
my display seems to have the greens slightly off when calibrating, when i go into custom color temperature and turned up the green this problem went away. is this the correct way of fixing my green problem or is it saturating just my whites with green.
my set is the new vizio vl420m.
any help is appreciated!
my set is the new vizio vl420m.
any help is appreciated!
1 - 16 of 16 Posts
i was using the flashing primary colors test pattern from the free disk that is on this forum. im using the color filters that came with my DVE dvd. when i look at the green bar with the green filter i can see the greens are off.the reds and blues are fine though. when i adjust the green color tempuature it seems to get rid of most of the problem but on my tv red and blue are at 128 while the green will be around over 200. thats what is bothering me. is this helping the colors for my set or just over saturating everything with green.
No, that's not the right adjustment for that problem. The error you are seeing is color decoding. The green color temperature is a different adjustment. Your TV probably does not have the correct adjustment for the green color decoder.
is this something that a professional calibrator could fix?
would you guys know how to get into the vizio service menu?
Quote:
Originally Posted by surap /forum/post/16885330
Absolutely!
would you guys know how to get into the vizio service menu?
Maybe. Depends on the TV, and it depends on whether color decoding is actually incorrect, which is dubious given the imperfect nature of the filters.
Quote:
Originally Posted by surap /forum/post/16885330
Absolutely!
Maybe. Depends on the TV, and it depends on whether color decoding is actually incorrect, which is dubious given the imperfect nature of the filters.
If there's no adjustment for it, a calibrator can't "fix" it. All a calibrator could potentially do is to make the error less obvious, perhaps by increasing the error in some other color that's not as objectionable as the green error.
Color Temperature is not influenced by green - red and blue control color temperature. You can have a "perfect" color temp, i.e. 6500K but it could have too much, too little, or the correct amount of green and still measure 6500K.
Quote:
Originally Posted by dukerock12 /forum/post/16884937
is this something that a professional calibrator could fix?
If there's no adjustment for it, a calibrator can't "fix" it. All a calibrator could potentially do is to make the error less obvious, perhaps by increasing the error in some other color that's not as objectionable as the green error.
Color Temperature is not influenced by green - red and blue control color temperature. You can have a "perfect" color temp, i.e. 6500K but it could have too much, too little, or the correct amount of green and still measure 6500K.
Yep! Which is why we don't calibrate to a CCT (color temperature), we calibrate to D65. Not the same thing. D65 is a defined color. A color temperature is an infinite number of possible colors.
how much would it cost to have a professional calibrator only do two inputs on my set?
Depends on the calibrator. Most of us have links to our webpages in our signature, and our pricing can usually be found there.
have you ever calibrated a vizio before chad b? ive been looking for the service menu code for vizios for a while and cant find one that works. if you have ever calibrated a vizio have you been able to get into the service menu or do you just do you adjustments on the basic settings?
Quote:
Originally Posted by Chad B /forum/post/16889238
Depends on the calibrator. Most of us have links to our webpages in our signature, and our pricing can usually be found there.
have you ever calibrated a vizio before chad b? ive been looking for the service menu code for vizios for a while and cant find one that works. if you have ever calibrated a vizio have you been able to get into the service menu or do you just do you adjustments on the basic settings?
Considering that color temperature ignores green (or magenta if there is not enough green), why is it still often displayed in TV calibration reports and reviews? Why not just rely on RGB levels instead and use the term white point instead of color temp? Am I overlooking something or does this make sense?
Because color temperature is a simpler concept to convey, and if you hit D65 accurately, you can call that ~6500K and people can understand that and have experience with that.
If I say that the color temperature is 8000K or 5500K you have a sense more or less of what that would look like. One is more bluish, the other more reddish white. If I give xy coordinates specifically, that doesn't communicate very well at all to the average person what the heck we mean, even though it is far more specific and identifies a specific color, while color temperature is sort of a simpler but non-specific characterization of color more generally. It's basically just telling you what point on the blackbody temperature curve is closest to the color you are describing.
In other words, correlated color temperature is a very useful concept, but it only describes as much as it describes. That doesn't mean it isn't useful, just that it's useful shortcut that doesn't tell the whole picture. Most of the time you don't really need the whole picture though, that would be cumbersome. A table showing % against color temperature is useful, much more useful informationally than a table showing you an array of xy coordinates. The table of xy coordinates tells you exactly everything you need to know, but doesn't communicate it very well at all.
Quote:
Originally Posted by PlasmaPZ80U /forum/post/16905031
Considering that color temperature ignores green (or magenta if there is not enough green), why is it still often displayed in TV calibration reports and reviews? Why not just rely on RGB levels instead and use the term white point instead of color temp? Am I overlooking something or does this make sense?
Because color temperature is a simpler concept to convey, and if you hit D65 accurately, you can call that ~6500K and people can understand that and have experience with that.
If I say that the color temperature is 8000K or 5500K you have a sense more or less of what that would look like. One is more bluish, the other more reddish white. If I give xy coordinates specifically, that doesn't communicate very well at all to the average person what the heck we mean, even though it is far more specific and identifies a specific color, while color temperature is sort of a simpler but non-specific characterization of color more generally. It's basically just telling you what point on the blackbody temperature curve is closest to the color you are describing.
In other words, correlated color temperature is a very useful concept, but it only describes as much as it describes. That doesn't mean it isn't useful, just that it's useful shortcut that doesn't tell the whole picture. Most of the time you don't really need the whole picture though, that would be cumbersome. A table showing % against color temperature is useful, much more useful informationally than a table showing you an array of xy coordinates. The table of xy coordinates tells you exactly everything you need to know, but doesn't communicate it very well at all.
At this point in time, it's really a matter of habit. Back in the beginning when this stuff was just beginning to catch on in product reviews and such, seems to me, there could have been a different approach, say providing a color and dE number to let you know how obvious the error was compared to the d65 reference point. If that had happened, by now you'd understand well that a 4blue error was much better than a 7green error and that a 1cyan error would be very good.
But there's a real problem trying to attach a single color temp or dE/color number to a video display... it's an average over the entire luminance spectrum and it may not even exist on any 1 grayscale step and it could be totally NOT indicative of what the display looks like. For example, a display that's a perfect 6500K could have 0%-50% close to 5000K and 51% to 100% at 8000K and it would average to 6500K but nobody would think it's a good display after looking at the picture. Similarly, if you say the display is 4red, you could have some steps with a yellow error, other steps with a blue error, other steps with a green error and never really see a red cast to anything. To understand a display, you need step-by-step graphs, not single numbers.
Quote:
Originally Posted by PlasmaPZ80U /forum/post/16905031
Considering that color temperature ignores green (or magenta if there is not enough green), why is it still often displayed in TV calibration reports and reviews? Why not just rely on RGB levels instead and use the term white point instead of color temp? Am I overlooking something or does this make sense?
At this point in time, it's really a matter of habit. Back in the beginning when this stuff was just beginning to catch on in product reviews and such, seems to me, there could have been a different approach, say providing a color and dE number to let you know how obvious the error was compared to the d65 reference point. If that had happened, by now you'd understand well that a 4blue error was much better than a 7green error and that a 1cyan error would be very good.
But there's a real problem trying to attach a single color temp or dE/color number to a video display... it's an average over the entire luminance spectrum and it may not even exist on any 1 grayscale step and it could be totally NOT indicative of what the display looks like. For example, a display that's a perfect 6500K could have 0%-50% close to 5000K and 51% to 100% at 8000K and it would average to 6500K but nobody would think it's a good display after looking at the picture. Similarly, if you say the display is 4red, you could have some steps with a yellow error, other steps with a blue error, other steps with a green error and never really see a red cast to anything. To understand a display, you need step-by-step graphs, not single numbers.
1 - 16 of 16 Posts
- This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.
AVS Forum
A forum community dedicated to home theater owners and enthusiasts. Come join the discussion about home audio/video, TVs, projectors, screens, receivers, speakers, projects, DIY’s, product reviews, accessories, classifieds, and more!
Full Forum Listing
Recommended Communities
