Convert RGB color to CMYK?

Question

I\'m looking for an algorithm to convert an RGB color to CMYK. Photoshop is performing the conversion below:

R = 220 G = 233 B = 174

C = 15 M = 0 Y = 40 K =

Answer 1

I think photoshop uses profile based conversions. Have a look at the documentation for the color options. If it is the case you won't be able to match this behavior with simple formula based solutions.

I have found LCMS to be very handy, simple and efficient for this kind of task.I don't known if there is any .net binding for it...