turning light gray to black

JW
Posted By
jim_willson
Dec 12, 2006
Views
5772
Replies
4
Status
Closed
hi, this is for Photoshop 6.0.
I often need to increase the contrast of a grayscale drawing so all gray lines turn black. This normally works except if the gray is very light. I would like to change the contrast threshold and turn up the contrast so any non-white feature turns black.

Put another way, let’s say I have some gray lines that are RGB = 30, 30, 30. In such case, I might want to set my threshold to 10, 10, 10 so everything below turns white and everything above that setting turns black. What is the correct way to do this?

— jim

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SF
Scott_Falkner
Dec 12, 2006
Image > Adjustments > Levels
C
chrisjbirchall
Dec 12, 2006
Image>Adjustments>Threshold
B
Bernie
Dec 12, 2006
Image>Adjustment>Curves
B
Bernie
Dec 12, 2006
There are at least three ways to do anything in Photoshop

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