实验室载体如何与实验室值不同 [英] how lab vector differe from lab values

问题描述

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我正在使用分段...我需要将实验室空间颜色值转换为实验室矢量......它是如何实现的。 .bwn实验室值与实验室向量有什么区别？tp如何表示实验室空间向量？

Hi guysss..

I am working with segmentation now...i need to convert l a b space color values to l a b vector...how its possible..??what is the difference bwn lab values and lab vector??how tp represent lab space vector??

推荐答案

这是一个完全错误的问题，有多么不同？只需了解此色彩空间的工作原理： https://en.wikipedia.org/wiki/Lab_color_space [ ^ ]。



关于差异的大多数问题本质上都是无效的。如果你还没有得到它，试着告诉使用苹果和苹果之间的差异。 :-)

-SA

This is a plain wrong question, "how differ"? Just learn how this color space works: https://en.wikipedia.org/wiki/Lab_color_space[^].

Most questions about "difference" are inherently invalid. If you didn't get it yet, try to tell use the "difference" between apple and Apple. :-)

—SA

首先尝试了解CIELAB的含义。比你会发现你的所谓的Lab *值是Lab * Vector的组成部分* *色彩空间



非常简短：

Lab *是一个（三维）色彩空间。 *来自历史，在CIE-LAB空间和亨特实验室等其他人之间做出了明显的区别。



请参阅wiki：

CIEAB> [ ^ ]



在这里你可以找到所有的公式（包括解释）来转换例如sRGB到XYZ等

http://www.brucelindbloom.com/ [ ^ ]







抱歉布局不好，我不知道如何做得更好;）

First try to understand what CIELAB means. Than you will find that your "so called" Lab* Values are the components of a Lab* Vector in the Lab* Colorspace

In very short:
Lab* is a (three dimensinal) colour space. The "*" Comes from history to make a clear difference between the CIE-LAB space and others like Hunter Lab.

See wiki:
CIEAB>[^]

Here you can find all the formulas (including explanation) to convert from e.g. sRGB to XYZ etc.
http://www.brucelindbloom.com/[^]



Sorry for bad layout, I don't know how to do it better ;)

That is simple vector addition/substratction.You do this component whise.
E.g. (and sorry for the bad representation)

       3    // L*
lab_1= 4    // a*
       2    // b*

       7
lab_2= -1
       1
                     3+7       10
than lab_1 + lab_2=  4+(-1)  =  3
                     2+1        3


And in your case you have simply 4 lab vectors from the source picture you need to calculate:
according to G(x,y)= lab_1 - lab_2 + lab_3 - lab_4 to get the Lab* value in your target gradient.

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