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white balance in JPG files.

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white balance in JPG files. s.kortenweg 28 Mar 15:08
  white balance in JPG files. Alexandre Prokoudine 28 Mar 15:27
  white balance in JPG files. Ofnuts 28 Mar 16:22
   white balance in JPG files. s.kortenweg 29 Mar 10:39
    white balance in JPG files. Alexandre Prokoudine 29 Mar 17:06
s.kortenweg
2011-03-28 15:08:39 UTC (almost 14 years ago)

white balance in JPG files.

I have some jpg files with a wrong white balance. Flash refused by taking the picture. How can i correct this in GIMP?

Siem Korteweg.

Alexandre Prokoudine
2011-03-28 15:27:49 UTC (almost 14 years ago)

white balance in JPG files.

On Mon, Mar 28, 2011 at 7:08 PM, s.kortenweg wrote:

I have some jpg files with a wrong white balance. Flash refused by taking the picture. How can i correct this in GIMP?

The usual ways is to use Levels (Color > Levels), take, black, grey or white color pick and pick a color that is known to be black, grey or white color respectively.

Alexandre Prokoudine http://libregraphicsworld.org

Ofnuts
2011-03-28 16:22:36 UTC (almost 14 years ago)

white balance in JPG files.

On 03/28/2011 05:08 PM, s.kortenweg wrote:

I have some jpg files with a wrong white balance. Flash refused by taking the picture. How can i correct this in GIMP?

http://luca.dealfaro.org/Whitebalance

This is a very simple script to use:

- use the color picker to set the foreground color from some part of the picture that should be grey or white. - call filter,
- done.

The colortemperature script by the same author is also a good catch.

s.kortenweg
2011-03-29 10:39:27 UTC (almost 14 years ago)

white balance in JPG files.

Op 28-03-11 18:22, Ofnuts schreef:

On 03/28/2011 05:08 PM, s.kortenweg wrote:

I have some jpg files with a wrong white balance. Flash refused by taking the picture. How can i correct this in GIMP?

http://luca.dealfaro.org/Whitebalance

This is a very simple script to use:

- use the color picker to set the foreground color from some part of the picture that should be grey or white. - call filter,
- done.

The colortemperature script by the same author is also a good catch.

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Thanks for your quick help.
I imported both scripts. After trying the script colortemp was the good one. Again, thanks.

Siem Korteweg.

Alexandre Prokoudine
2011-03-29 17:06:34 UTC (almost 14 years ago)

white balance in JPG files.

On 3/29/11, s.kortenweg wrote:

Thanks for your quick help.
I imported both scripts. After trying the script colortemp was the good one.

Just in case, you can use colortemp interactively via experimental GEGL tool ("Tools > GEGL operation" menu). This will draw preview right on canvas. For a large image this can be too slow, so you can temporarily resize, find the best setting, undo resizing and apply same operation with preview disabled.

Alexandre Prokoudine http://libregraphicsworld.org