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Extracting all pixels of a certain colour

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Extracting all pixels of a certain colour Andrew Black 30 Nov 08:58
  Extracting all pixels of a certain colour Andreas Waechter 30 Nov 09:26
Andrew Black
2004-11-30 08:58:26 UTC (about 20 years ago)

Extracting all pixels of a certain colour

Hi
I want to extract all pixels of a specific colour (to be more precise look a certain colour). I am finding that there is some variation in the colour. so if I try "select by color". I only get a subset of the pixels.
Is there a way of selecting all pixels close to the colour I want (where "close" can be determined by experimentation!)

Secondly can I move all these pixies into another layer/channel or image. I want to repeat this operation for a number of colours. Selection to Channel looks as if it might help but I didn't understand what to do then.

Andrew

Andreas Waechter
2004-11-30 09:26:00 UTC (about 20 years ago)

Extracting all pixels of a certain colour

I want to extract all pixels of a specific colour (to be more precise look a certain colour). I am finding that there is some variation in the colour. so if I try "select by color". I only get a subset of the pixels.
Is there a way of selecting all pixels close to the colour I want (where "close" can be determined by experimentation!)

Select by color allows to set a threshold - if you set it to 0, only the exact color is selected, the higher you set it the less similar a pixel must be to get selected.

Secondly can I move all these pixies into another layer/channel or image.

Copy, Paste, then in the layer dialog click on new layer ==> the selection is now a layer.

Andreas