Photoshop: Ability to have the Spot Healing brush to only affect the colors and NOT affect the luminance

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  • Updated 5 months ago
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When using the spot heeling brush might there be a way to only have it affect the colors in an image and NOT affect the luminance?   I am working with a number of old slides that I have scanned where there are these color splotches from moisture and other things - if I tip it to Black & White the luminance channel looks great - if I could use the spot heeling brush to only affect the color and not touch the luminance channel that would be great.  Might you consider adding the ability to choose only all of the color channels when using that brush?  I tried doing individual channels but it is not working out too well for me - I get a rainbow of colors where I didn't exactly retrace the brush.   I feel this might be a good added function for anyone doing photo restorations.  Thank you
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Mike Leonard

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Posted 5 months ago

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Richard Kain

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I think that you can achieve the desired result by the following technique, which is awkward, but probably functional.

1. Change to Lab mode
2. Copy the luminance channel to an alpha channel.
3. Perform the spot healing
4. Replace the luminance channel with the saved alpha channel.

If spot healing requires RGB mode, flip in and out of that mode to do it.

Good luck!
(Edited)
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James Gray

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Won't just doing the spot healing brush in color mode do it?

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Mike Leonard

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James - I think you are on to something there.  I did not know that option was there.  I just tried it but found the result was a change in luminance where the color distortion was.  What's odd is if I just tip the scene to Black & White the color splotches disappear which makes me think there should be a way to preserve the luminance but just change the color.  This is good though - I can just burn in the result fairly quickly - faster than trying to preserve the details and using a normal spot heeling procedure. .
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Johan Elzenga, Champion

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If you only want to change the color, then use the Clone Tool and set its mode to Color.