Need to Convert RGB color space to LUV* color space , Please tell am i correct with this code

3 Ansichten (letzte 30 Tage)

rky am 22 Jun. 2014

0
Verknüpfen

Direkter Link zu dieser Frage

https://de.mathworks.com/matlabcentral/answers/136898-need-to-convert-rgb-color-space-to-l-u-v-color-space-please-tell-am-i-correct-with-this-code

Kommentiert: fawad khan am 16 Jul. 2018

%convert to RgbI image in RGB to XYZ
XYZTransformation = makecform('srgb2xyz'); 
XyzI = applycform(RgbI,XYZTransformation);
%seperate X,Y,Z
X = XyzI(:,:,1);
Y = XyzI(:,:,2);
Z = XyzI(:,:,3);
figure, imshow(X) , title('X');
figure, imshow(Y) , title('Y');
figure, imshow(Z) , title('Z');
xyz = cat(3, X,Y,Z);
figure, imshow(xyz) , title('xyz');
%convert to XYZ
labTransformation = makecform('xyz2uvl');
luvI = applycform(xyz,labTransformation);
%seperate X,Y,Z
u = luvI(:,:,1);
v = luvI(:,:,2);
l = luvI(:,:,3);
figure, imshow(l) , title('l');
figure, imshow(u) , title('u');
figure, imshow(v) , title('v');

0 Kommentare
-2 ältere Kommentare anzeigen-2 ältere Kommentare ausblenden

Melden Sie sich an, um zu kommentieren.

Melden Sie sich an, um diese Frage zu beantworten.

Akzeptierte Antwort

Image Analyst am 22 Jun. 2014

1
Verknüpfen

Direkter Link zu dieser Antwort

https://de.mathworks.com/matlabcentral/answers/136898-need-to-convert-rgb-color-space-to-l-u-v-color-space-please-tell-am-i-correct-with-this-code#answer_141951

Looks right to me. Just realize that any lab or luv or any other colorspace values you get from "book formulas" are not going to be the same as the "true" values you'd get from a spectrophotometer or spectroradiometer. This is because your system is not calibrated and it assumes the values are sRGB which is not true.