its possible convert image rgb to YIQ for obtain results like this post?

[diegomage]

like this post
https://stackoverflow.com/questions/811 ... or/8123516

[fmw42]

You can emulate that code using -color-matrix.

Input:

Code: Select all

convert peppers_tiny.png -color-matrix \
" \
0.299 0.587 0.114 \
0.596 -0.274 -0.322 \
0.211 -0.523 0.312 \
" \
peppers_tiny_yiq.png

Here is an sRGB to YIQ transformation, showing the YIQ as if RGB:

Code: Select all

convert peppers_tiny.png -colorspace YIQ -separate \
-set colorspace sRGB -combine peppers_tiny_yiq2.png

Here is the same but swapping the first two channels:

Code: Select all

convert peppers_tiny.png -colorspace YIQ -separate \
-swap 0,1 -set colorspace sRGB -combine peppers_tiny_yiq3.png

[diegomage]

very thankyou for your help