RGB2Lab
version 1.0.0.0 (1.86 KB) by
Mark Ruzon
- 3 files
- 23 downloads
Converts an image from the RGB color space to the CIELAB color space.
CIELAB is a nonlinear transformation of RGB where the Euclidean distance between two colors is equal to their perceptual distances (for distances less than ~10 units). Algorithms that process color images often produce better results in CIELAB.
The equations implemented here come from Charles Poynton's Colour FAQ.
Comments and Ratings (11)
MATLAB Release Compatibility
Created with
R2007b
Compatible with any release
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Syahirah Addenan (view profile)
Thien Tran (view profile)
Surachet Jurakurd (view profile)
Atanas (view profile)
how exactly to use this file (to check if it works with some pic), sry for the question, but I am new in this and I need color space segmentation with Lab color space
Hyunsung (view profile)
This file is actually sRGB to Lab? sorry i am confused
Tim Zaman (view profile)
This assumes an sRGB color profile, most certianly not always the case.
Faranak Sh (view profile)
Thank You!
Tim Zaman (view profile)
you can only successfully convert if you know what color profile [RGB] is used. I guess you took sRGB?
Abe Lau (view profile)
I guess "makecform" is the native command Uwe was referencing to
Mark Ruzon (view profile)
What native MATLAB implementation? I see lab2double but not the reverse.
Uwe (view profile)
I don't see the advantage over the native Matlab implementation.
To make it nicer, you should make the whitepoint and the colorspace selectable. (now it is D65 and sRGB).