[magick-users] Working with one channel only?

[Claus Cyrny]

Hi,

I would like to write a script for an advanced 'Unsharp Mask'
technique, which I need very frequently. This technique requires
the image to be available in HSL color space (which is no problem),
but then only the 'L' channel shall be modified. How does one go
about there using ImageMagick?

TIA,

Claus

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