Have a look at section Semi-Transparent Colors on the Color Basics and Channels page of the ImageMagick Examples:
convert -size 1200x1000 xc:'rgba(0, 0, 0, 0.4)' out.png
This uses the xc
pseudo-format with an RGBA color.
문제
I work on a longer workflow to design elegant maps (project @Wikiatlas).
With ImageMagick shell command (convert
?)...
How to output a 1200px wide, 1000px high black png image with an opacity of 40% ?
해결책
Have a look at section Semi-Transparent Colors on the Color Basics and Channels page of the ImageMagick Examples:
convert -size 1200x1000 xc:'rgba(0, 0, 0, 0.4)' out.png
This uses the xc
pseudo-format with an RGBA color.