I am working on a project that requires me to separate out each color in a CYMK image and generate a halftone image that will be printed on a special halftone printer. The method used is analogues to silk screening in that the process is almost identical. Take a photo and break out each color channel. Then produce a screen for the half tone. Each color screen must have it's screen skewed by 15-45 (adjustable) degrees. Dot size and LPI must be calculated from user configurable values to achieve different effects. This process I am told is used in silk screening but I have been unable to locate any information that explains CYMK halftoning. I find plenty for reducing to a single color and generating new print style b/w halftone image.
I would guess that I need to:
- split the file into it's color channels.
- generate a monochrome halftone image for that channel.
- Skew the resultant halftone image by the number of degrees * channel number.
Does anyone know if this is the correct approach and any existing python code for this? Or of any good explanations for this process or algorithms?