Any suggestions on how to "onion skinning"?

Ian Wood revlist at
Thu Nov 29 04:19:42 EST 2007

You're extracting one of the three RGB channels.


On 29 Nov 2007, at 03:32, Mark Smith wrote:

> This is sort of interesting:
> if you simply take one of the color bytes of each pixel, and copy  
> it to the other two color bytes, you get a gray-scale result. The  
> brightness/contrast varies with which color you choose. For the few  
> images I've tried, it seems to be red =brighter/less contrast  to  
> blue= darker/more contrast. This may be no surprise to the pro  
> image wranglers among us, but seemed intriguing to me.

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