Legacy ImageMagick Discussions Archive

fmw42 wrote: 2017-06-01T09:29:48-07:00 You would have to crop off the scale at the right first, since it contains your red and blue colors as well.

Hi, like this?

The syntax above is bash. For Windows BAT:
convert tree.gif ^
-fill black +opaque yellow ^
-fill white -opaque yellow ^
-format "yellow sun pixels = %%[fx:int(w*h*mean+0.5)]" info:

If using v7, use "magick" instead of "convert".

Instead of "yellow", put "red" or "#f00" or "rgb(255,0,0)" or ...

To count the number of Yellow pixels, I would use this:
convert tree.gif -fill black +opaque yellow \
-fill white -opaque yellow \
-format "yellow sun pixels = %[fx:int(w*h*mean+0.5)]" info:

This is the same as 7 years ago, but explicitly rounded to the nearest integer.


Thanks a lot for the ...

Hi, I'm completely new to IM, in fact I downloaded it today. I found an answer for this exact question from 7 years ago.
Here are the answers: https://www.imagemagick.org/discourse-server/viewtopic.php?t=16177
My question would be, with the current version of IM, are those answers still the rule ...