Irfanview should do what you want already.

i_view32.exe c:\*.png /gray /convert=d:\temp\*.png

I don't see an obvious option for recursive directories, but the directory diving can be done with a very small script that makes the calls to convert everything in the directory.

In reply to Re: Recursive image processing (with ImageMagic) by SuicideJunkie
in thread Recursive image processing (with ImageMagic) by wvick

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