CODEWITHSUNDEEP
c++rgblibjpegcmyk
user427569
user427569

Reputation: 143

Convert YCCK jpeg to RGB

I have a jpeg image with the colors encoded in the YCCK color space. I have already decoded it in C++ using libjpeg. How can I convert it to RGB?

Converting it to CMYK would also be useful for me, since I know how to convert from CMYK to RGB using ICC color profiles.

Upvotes: 1

Views: 3548

Answers (1)

user786653
user786653

Reputation: 30460

Have a look here.

First, conversion is done into RGB format as:

R = Y + 1.402*Cr - 179.456
G = Y - 0.34414*Cb - 0.71414*Cr + 135.45984
B = Y + 1.772*Cb - 226.816

After that, conversion to CMYK image is performed as follows:

C = 255 – R
M = 255 – G
Y = 255 – B

The values of K channel are written without modification.

Upvotes: 1

Related Questions