Create pattern and save it to 24-bit RGB PNG file

Question

How can I create PNG file with ImageMagick pattern (e. g. input file pattern:gray50) and save it to 24-bit RGB PNG file using ImageMagick commandline?

This produces 8-bit PNG file:

convert -size 64x64 pattern:gray50 output.png

Answer 1

In ImageMagick, you can force the output PNG to 24-bits by prefacing the output with PNG24. Try

convert -size 64x64 pattern:gray50 PNG24:output.png