Correcting a Photograph of an Oil Painting: Removing White Micro Reflections - Spot Remover Not Enough
Dear Capture One Community:
This is my first post... I'm desperately hoping that someone can offer me some helpful tips!
I have a photograph of an oil painting. Because of the way it was painted, the surface yields many 'micro-reflections' that are hard to eliminate when shooting the picture. Here's a link to a detail at 100%:
https://www.dropbox.com/s/gsnaqafgfr2ygyu/Screen%20Shot%202020-05-09%20at%2015.11.52.png?dl=0
I have exhausted the 100 spot limit... and there doesn't seem to be a way to rasterize that so that I can start over for another 100.
What I am hoping to do now is find a way to mask the area, select the the white dots and then darken them... but my experiments with color selection and luma ranges has yielded zero results.
I'm sure I'm doing something wrong... and I'm hopeful there still might be a way to do this.
Can anyone help?
Thank you very much in advance for any suggested solutions, even if it's just a hunch.
Best,
Tim
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Grant, I'd be curious to see the image you mention that looks similar to my painting.
B.O., thank you for trying some things out... I think blending in the pixel editor is the best way to go.
Cheers,
Tim
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Tim,
Found a version of the image that came to mind as similar to the painting on line.
https://patdavid.net/2015/02/mairi-trois//P1280274-finishingC-s1600.jpg
Obviously the clothes, etc, are different though offering a similar sort of effect visually.
The pose and lighting are very similar to my eyes.
The original RAW seemed to be darker than this processed jpg.
It was a few years ago and I cannot recall the context in which the image was shared at the time.
Grant
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Grant,
Fascinating! I can see the similarities.
Thank you for digging that up.
Cheers,
Tim
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Glad you can see the similarities Tim.
Happy to know I may not be going completely mad!
;)
Grant
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I think I found a great solution, however you need to go an external editor.
I wish I had this function in C1 !!
It can be used to work like an enhanced Noise reduction "single" pixel slider in C1 (which in fact seems to be a four-pixel slider but isn't enough for reflections which cause aggregated pixels to clip)
I often have micro or macro reflections on moving sea waves or rain drops etc., which are pixelated and edgy from the default sharpening in C1.
I will eventually request a feature with more examples.
Now to your image:
BEFORE:
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AFTER:
GIMP
Filters > Distorts > Value Progagation > more black
You need to play a little bit with the values, avoid lower threshold zero to retain the canvas structure and other details.
Propagating rate = 1 increaes the effect a bit more, but I liked 0.86.
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P.S. Just to clarify: I developed this raw file in C1 and then passed it to GIMP via "edit with" as a tiff.
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BeO,
Very interesting! Thank you very much for sharing this. You've come across what I had expected to find in C1... something like a 'dynamic speckle filter'.
I see that Gimp is open source, so the next time I have to do this, I'll give your solution a try.Thank you again!
Cheers,
Tim
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Hi Tim,
Maybe you want to vote or comment on this request
Cheers,
BeO0 -
Many good solutions here, but my first question would be why this was shot with unpolarized light to begin with? I see that I'm not the first one to mention it, as Cyrill touched on it, but his suggestion didn't go far enough. By itself, a polarizer will do very little, the trick is to have polarizing film on each of the light sources. (At least two, for even illumination.)
I addition to saving a lot of post work, eliminating reflections and glare also brings out the true colors of the paint.
-Seb
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