i want to convert an image from rgb to xyz and want to get the values of x and y and z separately. so i am having a problem. how can i encounter the problem?????

Question

pritha Das 2014-11-20

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/163511-i-want-to-convert-an-image-from-rgb-to-xyz-and-want-to-get-the-values-of-x-and-y-and-z-separately-s

编辑： Thorsten 2014-11-20

在 MATLAB Online 中打开

RGB = [255; 255; 255 ];

rRGB=RGB(:,:,1);

gRGB=(RGB(:,:,2)./RGB(2)) * 100;

bRGB=RGB(:,:,3);

M = [0.4124564 0.3575761 0.1804375
  0.2126729 0.7151522 0.0721750
  0.0193339 0.1191920 0.9503041] ;
X = rRGB  * 0.4124564  + gRGB * 0.2126729  + bRGB*  0.0193339;
Y = rRGB  * 0.3575761  + gRGB * 0.7151522 + bRGB*   0.1191920;
Z=  rRGB  *  0.0193339  + gRGB * 0.1191920   + bRGB* 0.9503041 ;
so when i am running the programme i am getting this error

??? Index exceeds matrix dimensions.

Error in ==> pd at 3 gRGB=RGB(:,:,2)./RGB(2);

by d way when i am putting RGB=imread('F:\47.jpg', 'jpg') then i m getting a result..... what is the problem in the code???