Color management: RGB values

CS
Posted By
Coral_Schneberger
Jul 23, 2008
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246
Replies
1
Status
Closed
Working mass production with Aerial Photography. 8 bit color, scanline tifs

Client request RGB values of light gray areas be within 5 of each other. For example: Red 130, Green 132, Blue 135.

Need batch routine to run on 15,000 images. If it is even possible. Looking for options in CS3 or any other program.

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C
Curvemeister
Jul 25, 2008
Most automated processes are not able to recognize which objects should be true gray. For example, PS’s auto color or auto levels would make a blue lake to gray.

I’d recommend a combined manual and batch process. The operator would check a known gray area on about every 100th image, convert the image to Lab mode, and define a set of curves that would correct the color cast. Then use a batch operation to apply that curve to 100 images centered on that image. This would take 150 manual operations.

If the weather is constant, you may be able to increase the batch size considerably. By the same token, for changing sun angle, cloud cover or other situations that affect the color, you may need to increase the number of manual checks.

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