imlut(img, lut, kind, order, colorScheme)

This function applies a 1D or 3D LUT to an image for color gradient calibration.

This function applies 1D or 3D LUTs to image data for color gradient calibration.
A good description of LUTs can be found here:
http://www.lightillusion.com/luts.html

Syntax: [img_lut] = imlut(img,lut,kind,order)

Inputs:
img - the image on which the lut shall be applied, format double,
uint8 or uint16
lut - the color lookup table (either 1D or 3D)
kind - a string '1D' or '3D' specifying whether a 1D LUT or 3D LUT is used
order - order of LUT entries. We differentiate between 'standard' (default) and 'inverse' order. Examples:
Standard Order Inverse Order
R G B R G B
0 0 0 0 0 0
1 0 0 0 0 1
2 0 0 0 0 2
0 1 0 0 1 0
1 1 0 0 1 1
2 1 0 0 1 2
0 2 0 0 2 0
... ...
2 2 2 2 2 2

Outputs:
img_lut - image after colors are changed according to LUT,
format double, uint8 or uint16 depending on LUT values

Example:
img = imread('path_to_image');
lut = dlmread('path_to_lut.cube', ' ', 4, 0);
[img_lut] = imlut(img, lut, '3D', 'standard')
imshow(img_lut)