I use ImageMagick a LOT.
Thanks for a great program.

I use
convert imagein -channel all -contrast-stretch 0x0 imageout
on raw film scans to expand the histogram prior to gui editing. 
Sometimes I'd like to shrink/de-contrast an image.
like
convert imagein -channel all -contrast-stretch -1%%x-1%% imageout
But negative arguments to -contrast-stretch seem to be ignored, with no 
complaint, and no effect on the image.

Can I achieve a contrast shrink some other way?
TIA

-- 
Russ Butler (NJ USA)
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