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View Full Version : Inverting a portion of an image

philnolan3d
08-16-2009, 11:18 PM
I have this great image I want to use as a mask in 3D Coat, but the problem is that a portion of it is dark and would be perfect for the mask, but another portion is lighter which would also work, as I could just invert it, but I need the whole image to be one or the other. Any ideas how to do that? I'm working in Photoshop CS4 Extended. I'm attaching a small version of the image so you can see what I mean.

http://img30.imageshack.us/img30/8851/masksmall.th.jpg (http://img30.imageshack.us/img30/8851/masksmall.jpg)
jfrancis
08-17-2009, 03:11 AM
A careful selection should let you invert part of it, but here's a differnt thought:

Run a high pass filter on it, then take the resulting scratch-detail-on-gray image, darken it, and increase contrast.

You should end up with light scratches on a dark, even base
jfrancis
08-17-2009, 03:22 AM
Ok. Never mind. I see you got the same answer in your cross-posted version of this same thread (http://forums.cgsociety.org/showthread.php?p=6049640).
philnolan3d
08-17-2009, 03:39 AM
Yes sorry I posted that thread, then immediately thought it would make more sense to post it here instead. Seems I got more responses there after all. Thanks anyway.
sbdb
09-05-2009, 07:29 AM
Anyone who cross posts should be banned.
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09-05-2009, 07:29 AM
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