i use function size(a), 1200*1920*3. what 3 means in this?

where a is my image matrix, i got result as 1200*1920*3. what 3 means in this?

Answer 1

[Image Analyst]

It means there are 3 color channels. If you use only 2 outputs, then the second one is hte number of columns time the number of color channels. See Steve's blog for more info: http://blogs.mathworks.com/steve/2011/03/29/even-more-information-about-the-size-function/

[rows, columns, numberOfColorChannels= = size(rgbImage);

Answer 2

[ES]

three dimensional data. I think you read a 1200X1920 colour image. The 3 rd dimension is R, G, B values. What i mean is data[:,:,1] is R, data[:,:,2] is G, data[:,:,3] is B values.

[chitresh]

k thanks but when i am using [M,N] = size(A); command then it gives M = 1200 and N = 5760 i.e. 1920*3 .... and according to your answer it should be M = 1200 and N = 1920

[Urmila]

hello, actually i have the same problem.If you understand the concept,tell me also.Thanks in advance.

[Image Analyst]

Did you read Steve's blog that I posted in my answer? It discusses it at length.