What does the equation do in the 2 images to combine it to one image

Please can someone explain what happens in the below code

cb and cr are chrominance in red and blue channels

bmean and rmean is the mean value of cb and cr

x = [(cb − bmean), (cr − rmean)]

how is becomes a single image, what does that comma do there? Please can someone help me

Answer 1

[Sulaymon Eshkabilov]

Actually this gives two images representing one image twice one of which is darker than the other. The comma "," just a separates two data sets. You can skip "," and leave blank space that gives the same output. Or if you use ";" then the two image will be displayed one above another in a vertical form.

In order to get or see one image, just to use:

x1 = (cb − bmean); x2= (cr − rmean); subplot(211), imshow(x1); subplot(212);imshow(x2)