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I’m currently busy contrast masking in order to boost the (very!) limited dynamic range of my film scanner. This involves scanning the same slide twice, once for highlights and once for shadows. The two scans are then stored in layers and the bottom layer is used as the layer mask for the top layer, resulting in an image composed of the best parts of both.
During this procedure a certain amount of Gaussian Blur should be applied to the layer mask.
Now then, there are basically two distinct cases here: one, when an image mostly comes through (highlights scan supplies the highlights, shadows scan supplies the shadows), and two, the "bit in the middle" where both layers contribute.
The problem is, case one (an image comes through) wants minimum, read *no*, Gaussian blur while case two (the mix) wants *lots* of Gaussian blur.
Choosing the "happy medium" of Gaussian blur just makes them both unhappy… Case one develops "auras" while case two becomes washed out.
I could edit the layer mask manually but that’s far too time consuming and finicky, and I’m trying to streamline and automate the procedure as much as possible.
Any ideas on how to do that?
Don.
During this procedure a certain amount of Gaussian Blur should be applied to the layer mask.
Now then, there are basically two distinct cases here: one, when an image mostly comes through (highlights scan supplies the highlights, shadows scan supplies the shadows), and two, the "bit in the middle" where both layers contribute.
The problem is, case one (an image comes through) wants minimum, read *no*, Gaussian blur while case two (the mix) wants *lots* of Gaussian blur.
Choosing the "happy medium" of Gaussian blur just makes them both unhappy… Case one develops "auras" while case two becomes washed out.
I could edit the layer mask manually but that’s far too time consuming and finicky, and I’m trying to streamline and automate the procedure as much as possible.
Any ideas on how to do that?
Don.
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