I'm trying to generate a heatmap. Catch in this heatmap is that some points have a positive influence and others have a positive influence. I have an image with a basic point (posdot14.png, 38x38 pixels). The center pixel is white and becomes progressively blacker towards the borders.
Code: Select all
convert -page 256x256 -background black \( -page +31+31 posdot14.png -compose Plus \) \( -page +51+31 posdot14.png -compose Minus \) -composite /tmp/out.png
Thanks for any help.
With kind regards,
Harm