Lab instead of RGB?

Question

Lab instead of RGB?

Santinell opened this issue 9 years ago · comments

What do you think about change for better search color space from RGB to Lab or LCH?
I am not profi, but in CIE76 (color diff. algorithm) using euclidian distance in Lab color space.
In CIE94 used LCH color space.

Khaidi Chu · Answer 1 · Mon Jan 19 2015 15:57:20 GMT+0800 (China Standard Time)

Sry, I don't know those algorithms.

I will add learn CIE76 into my TODO list and write a CIE76 version of thmclrx.

But in octree algorithm, the calculation is using RGB color space.

Pavel Evdokimov · Answer 2 · Mon Jan 19 2015 16:42:08 GMT+0800 (China Standard Time)

As I know octree algorithm can be used for searching nearest neighbor in 3-dimensional space.
Lab is also has 3 dimensions

Khaidi Chu · Answer 3 · Mon Jan 19 2015 16:52:34 GMT+0800 (China Standard Time)

@Santinell But in reducing colors, octree algorithm using R, G and B these three dimensions.

Pavel Evdokimov · Answer 4 · Tue Jan 20 2015 13:23:45 GMT+0800 (China Standard Time)

http://en.wikipedia.org/wiki/Color_quantization#Algorithms
"The three color channels are usually red, green, and blue, but another popular choice is the Lab color space, in which Euclidean distance is more consistent with perceptual difference."

Khaidi Chu · Answer 5 · Tue Jan 20 2015 16:24:24 GMT+0800 (China Standard Time)

@Santinell Thx very much. I will read that for further. And would you please to improve this package together?