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removing flash glare

Apr 13, 2012, 04:33
Post: #1
removing flash glare
I think I can redraw the eyes in the sockets, but any ideas how to remove the glare? Thanks.


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Apr 18, 2012, 22:18
Post: #2
RE: removing flash glare
is that a dog or a cat? 8)
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Apr 19, 2012, 03:54 (This post was last modified: Apr 19, 2012 03:55 by kevin32.)
Post: #3
RE: removing flash glare
cat, and this is my best try as a beginner, but now the face looks awful.


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Apr 19, 2012, 20:17
Post: #4
RE: removing flash glare
If this is really the image you have it's hopeless.

[Image: 2Tvo0.png]

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Sep 12, 2014, 07:57 (This post was last modified: Sep 12, 2014 17:38 by piotrkast.)
Post: #5
RE: removing flash glare
I had procedure which completely remove flash from photo. To remove this effect:
1. Create four new layers from original: hue, saturation, overlay and value (in this order and set its mode to his corresponding names - layer hue mode hue etc.)
2. Turn off visibility value layer
3. Set active layer to overlay
4. On the overlay layer choose Colors then Desaturate (in short: Colors/Desaturate)
5. In desaturate use:
a) Luminosity - when remove flash glare
b) Lightness - when remove oversaturated colors
6. Choose Colors/Invert
7. In Filters Menu choose Blur then Gaussian Blur and set radius calculated by Gaussian Blur calculator in web page http://www.tankedup-imaging.com/no_flash_choice.html (scroll down on this page to the end section Contrast Mask)
8. Turn on visiblity value chanel and set it active
9. Choose Colors/Levels and click Auto
10. On Each Channel (Value, Red, Grean Blue) move to the left or right gamma slider (middle of the top triangles). You must move this slider until image show full spectrum of grayscale on the image in this channel.

This procedure seems to be working on the bright images, but on the dark ones we must do additional steps:
1 Duplicate channel layer from step 10 previous procedure
2. Choose Filters/Luminance/Extract (plugin from http://registry.gimp.org/node/25522)
3. Set new chroma i luminace mode layers to Darken Only
4. On chroma and luminance channel move opacity to the moment until you get correct image.

To show that this procedure is working compare with image below:
   

Please redistribute this procedure to all gimp forums. You will be suprised how effective this procedure is. I've been using this procedure from some time and never let me go down.
My final question is: maybe someone write a plugin based on procedure which I described?
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Sep 12, 2014, 12:19
Post: #6
RE: removing flash glare
piotrkast
And what about (invert the layer)?

Among desaturate the image (5) and before the blur (gaussian)(6).
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Sep 12, 2014, 12:46 (This post was last modified: Sep 12, 2014 12:46 by piotrkast.)
Post: #7
RE: removing flash glare
(Sep 12, 2014 12:19)Akros Wrote:  piotrkast
And what about (invert the layer)?

Among desaturate the image (5) and before the blur (gaussian)(6).

Mea culpa. I forgot about this. Thanks about info Akros. I corrected this procedure.
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Sep 12, 2014, 16:43
Post: #8
RE: removing flash glare
Here's my try at it.

Does .XCF save the undo history?

If so, you can see my full process by clicking up the "undo history list" before you make any changes to it.

My process:
1. Duplicate layer
2. On duplicated layer adjust color curves (red green and blue)
Colors > Curves...
Pull down and edit the green & blue channels similar to this:
[Image: O2cIVI0.png]

3. Colors > Desaturate > "Average"

4. Change layer mode to "Value"

5. Last, on your top (black & white copy) layer, use the Heal Heal tool, define the source the black fur of the cat, then heal around the glare, it will be blended out:
[Image: GPng4vG.png]


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.xcf  test(cat).xcf (Size: 342.01 KB / Downloads: 10)

"In order to succeed, your desire for success should be greater than fear of failure." BC
[Image: 29uocaf.png]
iFS007 tut vids on YT ~ auto color B&W landscape tut
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