How do I check if an image is RGB color or gray scale before execution?

How do I check if an image is RGB (true color) or gray scale before execution of my code?

[Priyanka Roy]

"If" condition satisfy for RGB image

if size(Image,3)==3

Answer 1

[Image Analyst]

See this snippet where I check if the number of color channels is 1 and then, if it's not, and I wanted a grayscale image instead of an RGB image, I convert it to gray scale:

grayImage = imread(fullFileName);
% Get the dimensions of the image.  
% numberOfColorBands should be = 1.
[rows, columns, numberOfColorChannels] = size(grayImage);
if numberOfColorChannels > 1
  % It's not really gray scale like we expected - it's color.
  % Convert it to gray scale by taking only the green channel.
  grayImage = grayImage(:, :, 2); % Take green channel.
end

Of course you can call the image array anything you want, and check if numberOfColorChannels > 1 or if numberOfColorChannels == 3, or however you want to do it, and then take whatever actions you want to based on knowing how many color channels it has.

[Martin Makay]

Your code helped me out big time, stay cool bro.

[Image Analyst]

@Martin Makay, thanks for the nice comment.