How to convert RGB to CIE Lab color space?
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Sabarinathan Vadivelu
am 7 Sep. 2012
Kommentiert: Image Analyst
am 10 Jul. 2019
How to convert RGB to CIE Lab color space?
0 Kommentare
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Image Analyst
am 7 Sep. 2012
Convert the image to L*a*b* color space using makecform and applycform.
colorTransform = makecform('srgb2lab');
lab = applycform(rgbImage, colorTransform);
Here's a full demo here: http://www.mathworks.com/products/demos/image/color_seg_k/ipexhistology.html
7 Kommentare
Image Analyst
am 4 Jan. 2017
zee, you can also use rgb2lab(). But, what output are you expecting? You get an image. And to see that image you can use imshow(), or you can just look at its values in the variable editor in the workspace. But no output will get "shown" unless you do one of those two things. Otherwise all you get is a new variable.
If you want to see the 3-D color gamut, you can use colorcloud() (R2016b and later).
Weitere Antworten (3)
Deepak Panda
am 13 Okt. 2015
How can I transfer rgb to Lab color space with luminance [0 100], a [-86.18 98.23] and b [-107.86 94.47]
5 Kommentare
Kondal Rao J
am 16 Jun. 2017
If you have higher version than 2014....just rgb2lab is sufficient to convert the image to lab color space
Yoon ThiriZaw
am 14 Jun. 2019
Can we calculate rgb to lab without matlab code using hand calculation?
3 Kommentare
Image Analyst
am 14 Jun. 2019
Try here: easyrgb.com
First go from RGB to XYZ, then XYZ to LAB.
Or you could try Bruce Lindbloom's site
The above are just images so you can't click on them. But click on the link and go to the site and click on the formula you want and it will be there.
Just be aware that your LAB values will NOT be the same as what you get from a spectrophotometer, unless you do a calibration.
kasthuri c
am 10 Jul. 2019
how to find the values of L paramete a parameter b parameter in Lab conversion method.
1 Kommentar
Image Analyst
am 10 Jul. 2019
labImage = rgb2lab(rgbImage);
LImage = labImage(:, :, 1);
aImage = labImage(:, :, 2);
bImage = labImage(:, :, 3);
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