Legacy ImageMagick Discussions Archive

now what I am doing,

rem extract #00FF00, other as white
convert input.png -fill white +opaque "#00FF00" temp1.png
rem extract #FFFFD5, other as white
convert input.png -fill white +opaque "#FFFFD5" temp2.png
rem make it transparent
convert temp1.png -transparent white temp1_transp.png
convert temp2.png -transparent white temp2_transp.png
rem make 2 transparent png together
composite temp1_transp.png temp2_transp.png temp3.png
rem make the transparent white
convert temp3.png -background white -flatten result.png

can it do it in a single command ? because I need tens of colors and my code is not quite scalable, and skip the creation of temp image.
thanks.

What is your platform? From "rem", perhaps it is Windows BAT. If not, you will need to adjust this. Untested.

Code: Select all

convert ^
  input.png ^
  ( -clone 0 ^
    -fill white +opaque "#FFFFD5" ^
    -transparent white ^
  ) ^
  ( -clone 0 ^
    -fill white +opaque "#00FF00" ^
    -transparent white ^
  ) ^
  -delete 0 ^
  -composite ^
  -background white -flatten ^
  result.png

I think that "-fill white +opaque "#FFFFD5" -transparent white" can be simplified to "+transparent #FFFFD5".

working and great, thanks

Legacy ImageMagick Discussions Archive

extract colors from one image, other as white

extract colors from one image, other as white

Re: extract colors from one image, other as white

Re: extract colors from one image, other as white