Click White Too Green?

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klaxian
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Click White Too Green?

Post by klaxian »

Whenever I use the "click white" feature for white balance, the resulting image looks a little too green. The white balance chosen by the camera is usually more pink. I know I can change the tint, but that adds an extra step after each "click white" and it's imprecise. Am I the only one noticing this? Any suggestions?

In addition, the tint level in ASP is different than the initial reading from the camera to produce the same color. For example, a tint of 30 in ASP looks more green than a tint of 30 converted straight from the camera.

I hope I explained this well. Any help is appreciated.
afx
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Re: Click White Too Green?

Post by afx »

Which Camera?
There are some for which this misbehavior has been reported...
I suggest notifying the Monkey.

cheers
afx
Send bugs to the Monkey // AfterShot Kickstart Guide // sRGB clipping sucks and Adobe RGB is just as bad
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klaxian
Posts: 38
Joined: Sun Jan 22, 2012 11:20 pm
operating_system: Linux
System_Drive: N/A
32bit or 64bit: 64 Bit
motherboard: ASUS P67 Revolution
processor: Intel 3770k 4.6GHz
ram: 16GB
Video Card: Nvidia GTX 480 SLI
Hard_Drive_Capacity: 240GB SSD
Monitor/Display Make & Model: 3 x ASUS ML248H
Location: New York

Re: Click White Too Green?

Post by klaxian »

This actually happens on RAWs from all my cameras (Canon 5DIII, 7D, S100). It's not drastic, but it is noticeable.
DocBrown
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Re: Click White Too Green?

Post by DocBrown »

I've seen a slight magenta tint to click white on some images with my 7D. Try using the gray eye dropper in the Curves tool after setting the click WB. When I see the undesired color tint, this more often than not gives me good results.
Chuck
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klaxian
Posts: 38
Joined: Sun Jan 22, 2012 11:20 pm
operating_system: Linux
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32bit or 64bit: 64 Bit
motherboard: ASUS P67 Revolution
processor: Intel 3770k 4.6GHz
ram: 16GB
Video Card: Nvidia GTX 480 SLI
Hard_Drive_Capacity: 240GB SSD
Monitor/Display Make & Model: 3 x ASUS ML248H
Location: New York

Re: Click White Too Green?

Post by klaxian »

You're right. It does seem to vary by camera. Click White looks too green with my 5DIII and a bit too pink with my old T3i. It's off enough that it's noticeable. Perhaps the chroma noise characteristics of each sensor is influencing the WB?
Ralf
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Re: Click White Too Green?

Post by Ralf »

I also see too-green results from Click White, as well as when just switching from a preset to Custom Kelvin (using identical Temp/Tint settings as the preset); I need to increase Tint by 15-20 toward purple to match the preset in the latter case, and that's also the amount which makes Click White look right. Nikon D7000.
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