Re : [Gimp-user ] How to export only one channel in grey levels ?

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How to export only one channel in grey levels ?	Jean-Luc Coulon (f5ibh)	11 Jan 18:20
How to export only one channel in grey levels ?	David Neary	11 Jan 19:16
Re : [Gimp-user ] How to export only one channel in grey levels ?	Jean-Luc Coulon (f5ibh)	11 Jan 19:39
Re : [Gimp-user ] How to export only one channel in grey levels ?	David Neary	11 Jan 19:46

How to export only one channel in grey levels ?

Hi,

I've shooted some infra-red pictures with my digital camera. I would like to isolate the red channel and transform it to a black and white picture, discarding the green and blue channels.

How to do that ?

If I select only the red and change the mode to grey levels, I get only a transparent picture.

--
Regards
- Jean-Luc

How to export only one channel in grey levels ?

Hi,

Jean-Luc Coulon (f5ibh) wrote:

I've shooted some infra-red pictures with my digital camera. I would like to isolate the red channel and transform it to a black and white picture, discarding the green and blue channels.
How to do that ?

You should decompose the image. This is not the only way to do it, but it's certainly the easiest. The Decompose filter was moved in the 1.3 tree to /Filters/Colors/Decompose. Select RGB from the choices offered, and you will get 3 greyscale images, one for each channel.

Cheers, Dave.