How to colorspace to RGB ?

How to convert color image with GUI CMY to RGB YCB to RGB YIQ to RGB HSV to RGB HSI to RGB HSL To RGB CIELab To RGB and RGB To CIELab RGB To HSL

Answer 1

[Image Analyst]

There are functions for that, like rgb2lab(), rgb2ycbcr(), rgb2hsv().

Or file Exchange functions: http://www.mathworks.com/matlabcentral/fileexchange/28790-colorspace-transformations

http://www.mathworks.com/matlabcentral/fileexchange/?search_submit=fileexchange&query=westland&term=westland

Answer 2

[DGM]

Pascal Getreuer's Colorspace Transformations tools on the FEX are good, but they haven't been maintained for a decade now. There are some issues which won't be fixed. If you need HSI (as I did), beware that the m-code implementations of the HSI conversions are incorrect (the mex versions should be ok if you can compile them).

This offers a handful of bidirectional conversion tools for HSL/HSI and some uncommon models:

https://www.mathworks.com/matlabcentral/fileexchange/53354-colorspace-conversion-tools

Includes:

• HSI
• HSL
• HSY (chroma-normalized polar YPbPr)
• HuSL (chroma-normalized LCHab and LCHuv)
• HSYp (rotationally-symmetric subset of HSY)
• HuSLp (rotationally-symmetric subset of HuSL)
• LCH (polar variants of LAB, LUV, OKLAB, and SRLAB)

Common stuff (HSV, LAB, YCbCr, XYZ) can be found in base MATLAB/IPT tools.