Please help: convert to 8 bit grayscale

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anthony
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Post by anthony »

I think you need more specific info. Output format? image? etc...
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anthony
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Post by anthony »

As a guess
convert input.bmp -colorspace grey -depth 8 -colors 256 output.bmp
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anthony
Posts: 8883
Joined: 2004-05-31T19:27:03-07:00
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Post by anthony »

As a guess

Code: Select all

   convert input.bmp -colorspace gray \
                -quantize gray -depth 8 -colors 256 output.bmp
But as I am not a Windows used and as such do not have any experience with BMP, I can't be certain.
Anthony Thyssen -- Webmaster for ImageMagick Example Pages
https://imagemagick.org/Usage/
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