How to save an image converted from RGB to greyscale?

1 view (last 30 days)
Kavorka
Kavorka on 16 Mar 2016
Answered: Walter Roberson on 16 Mar 2016
I'm new to matlab and when I convert an RGB image to a greyscale intensity map, I can't get the output to save as a greyscale...it saves an an RGB. Is this because I am using imshow and then saving the figure? If so, can someone help me figure out how to work imwrite into this code? I'm using:
i = imread('sample.png');
i = im2double(i);
a = .299*i(:,:,1) + .587*i(:,:,2) + .114*i(:,:,3);
imshow(a);

Sign in to answer this question.

Accepted Answer

Walter Roberson
Walter Roberson on 16 Mar 2016
imwrite(a, 'OutputFile.png')

More Answers (0)

Categories

Find more on Image Processing Toolbox in Help Center and File Exchange

Tags

Products

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!