how to convert the pixel values of the image in the range of (0-255) into (0-1)?
7 views (last 30 days)
Show older comments
Hi i have to convert the image pixel values in the range of (0-255) into (0-1) Is there any function or program available?
0 Comments
Answers (3)
Azzi Abdelmalek
on 28 Feb 2013
Edited: Azzi Abdelmalek
on 28 Feb 2013
im1=imread('yourfile');
b=linspace(0,1,255);
im2=arrayfun(@(x) b(x+1),im1)
4 Comments
Jan
on 28 Feb 2013
Surprising. Then I'd suggest:
im2 = reshape(b(im1(:) + 1), size(im1));
But this looks less attractive, of course. Anyway, it is still faster.
Azzi Abdelmalek
on 28 Feb 2013
Edited: Azzi Abdelmalek
on 28 Feb 2013
Surprising. You are right, I messed up, in fact I've tried b(im) instead of b(im+1), did not even read the error message, thinking it was caused by the matrix dimension. im contains 0 that causes the error. b(im1) worked for a tif image that does not contains a 0
Image Analyst
on 28 Feb 2013
Yes, there is a built-in function. It is called mat2gray().
normalizedImage = mat2gray(grayLevelImage);
0 Comments
See Also
Categories
Find more on Convert Image Type in Help Center and File Exchange
Products
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!