How to Downsample image in both Horizontal and Vertical Direction
133 views (last 30 days)
Show older comments
Any one help me how to downsample image in horizontal direction and vertical direction.
i used downsample(image,4), it will down sample image in both the direction, but i need to downsample separately for horizontal and vertical.
Does any know suggest me please.
Thank You
0 Comments
Accepted Answer
Sean de Wolski
on 7 Dec 2012
Edited: Sean de Wolski
on 7 Dec 2012
For grayscale:
Xdown = X(1:2:end,1:2:end);
If it's RGB, keep the third dimension:
Xdown = X(1:2:end,1:2:end,:);
1 Comment
Image Analyst
on 7 Dec 2012
That's how I'd do it for simple subsampling by an integer (2, 3, 4, etc.). There is also the imresize() function that you can use. It will handle interpolation if the subsampling is not by integer amounts.
More Answers (0)
See Also
Categories
Find more on Multirate Signal Processing in Help Center and File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!