How to detect reddish spots with OTSU method?

Question

C++ / C#

It is necessary to highlight (detect) spots with a reddish tint in the image using the OCC threshold segmentation algorithm. These spots are on a grayish background (there are both white spots and gray ones). What will be the stages of working with the image? Implementation in c++?

Answer 1

Implementation - in any language.
Steps:
1. Color "etching" of the raster based on the color shade (leaving only the desired color range)
2. Making it monochrome
3. OCC
4. Creating contour areas (outlining clusters of adjacent pixels)