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Old Mar 17, 2005, 8:58 PM   #1
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Can anyone tell me what the "Black Point Compensation" checkbox does? I can't find any reference to it in the manual.

Thanks
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Old Mar 18, 2005, 8:16 AM   #2
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BPC is actually a very complex subject, but to put it as simply as possible, BPC compensates for differences in density range of devices by scaling data so that it "fits" in the black-to-white range of the device. In other words, if the printer/paper/ink you are using has a low dynamic range caused by black in the print not being very dark, BPC can help because it will take this into account and scale things accordingly. With BPC on, you avoid clipped shadows because they will be scaled to fit within the range of your printer. With BPC off, you may get some clipping since colors darker than your printer can produce will all look the same.

My recommendation: just leave BPC on at all times.

Mike
http://www.ddisoftware.com
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Old Mar 18, 2005, 10:49 AM   #3
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Thanks Mike. I always had it on until I read that "ICC Profiles Guide" by Canon that recommended turning it off in one instance. Now it's back to "on" as you suggest.
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