How to convert an image from rgb to l*a*b color space without using any function???

i want to change rgb image into l*a*b color space without using makecform() and applycform() functions.....how can it be done???????

[Doug Hull]

Why not use the functions?

[pritha Das]

well i am working on an assignment regarding this topic...please if you have any idea about converting rgb to lab color space without using function then please help me out...

[maram Ahmed]

There is a direct function called rgb2lab.

[noor abidi]

but its only available in MATLAB 2017 version

Answer 1

[John Barber]

Here is a good reference for color space conversions:

http://www.brucelindbloom.com/index.html?Equations.html

Once you understand the basics of color spaces and converting between them, writing a short function to do a conversion from sRGB to Lab should be quite easy.

Answer 2

[Image Analyst]

You can find "book formulas" here: http://www.easyrgb.com/index.php?X=MATH First go from RGB to XYZ, then go from XYZ to Lab.