imsubtract(data(:,:,1), rgb2gray(data));

imsubtract(data(:,:,1), rgb2gray(data));

how does the above function work??i know the operation of imsubtract in general.Here i dont understand the part "data(:,:,1)" where 'data' is an image and what does "(:,:,1)" specify here??plz anyone respond to this and give me answer as soon as possible..thankyou

Answer 1

[Sean de Wolski]

data(:,:,1) specifies the first three dimensional slice of data. In an RGB image, this would be the R slice (plane).

[Manoj Murali]

thanq for d answer..but can u b more elaborate..??what is the meaning of the semicolon symbols and wat is that '1' at the end inside the brackets.how is that related to the image named 'data'??dont mind if am asking a very simple question!!

[David Young]

Have a look at http://www.mathworks.co.uk/help/techdoc/ref/colon.html

[David Young]

... and also www.mathworks.co.uk/help/techdoc/math/f1-85462.html