how to calculate l2 norm of lab vector

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This is the equation to find image gradient in lab color space ..

G(i,j)=sqr (||L(i+1,j)-L(i-1,j)||) + sqr (||(L(i,j+1)-L(i,j-1)||)

Here G(i,j) denotes gradient fn at i j position .

L(I,J) Denotes lab vector fn (here we have l a b values which converted from pixel r g b)

|| is l2 norm of lab vector..

please anybody explain how to calculate l2 norm of this lab vector in ths equtn..

Posted 16-Sep-15 19:05pm

silvsten john

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sreeyush sudhakaran 17-Sep-15 1:23am

Sorry, What are you trying to ask , Help to solve a Mathematical equation? Did you mean HSL or CIE to RGB conversion?

if so here is sample code for conversions :

http://www.codeproject.com/Articles/613798/Colorspaces-and-Conversions

http://www.geekymonkey.com/Programming/CSharp/RGB2HSL_HSL2RGB.htm

http://www.codeproject.com/Articles/19045/Manipulating-colors-in-NET-Part

http://www.cs.rit.edu/~ncs/color/t_convert.html

Reference Book : Advances in Intelligent Systems and Applications - Volume 2

silvsten john 17-Sep-15 1:57am

Ok..thank u..sir then...my aim is to do slic super pixel segmentation...

I didnt find any opencv libraries in c# for this slic super pixel segmentation..
Bt i found slic segmentation by c++ on opencv github site...

My questn is..how can i use this resource for my c# project bec it doesnt have dll or exe file to refer to my project...??

My secnd qus is ,how can i download code source from github....??

Pls help me

Richard MacCutchan 17-Sep-15 4:02am

how can i download code source from github

Go to the github location for the code and use the information on that page.

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