How to rotate an Image in Matlab 90 degrees

Question

I have an image that I'd like to rotate by 90 degrees right, how can I do it without using any toolbox.

I've written a function that puts a picture on a sub-picture after user gives 4 points. I believe there has to be an easier way.

Thanks in advance!

[`rot90`](http://es.mathworks.com/help/matlab/ref/rot90.html) ? — Luis Mendo, Jan 05 '16 at 14:26
The duplicate appears a bit overkill to me, as this question is only on 90 degrees, so `rot90` or `permute` do the job well enough, and there's no need for that complicated stuff. — hbaderts, Jan 05 '16 at 14:34

score 0 · Answer 1 · answered Jan 05 '16 at 14:46

0

Knowing rot90 rotates the image to the left try this.

The image will then be rotated right. Whether it is flipped left-right using fliplr or up-down using flipud does not matter.

-or-

Use rot90 3 times.

The following is a slight modification of the MATLAB example

load mandrill
figure('color','k')
image(fliplr(rot90(fliplr(X))))
colormap(map) 
axis off          % Remove axis ticks and numbers
axis image

answered Jan 05 '16 at 14:46

Agriculturist

3

You can just perform `rot90(I,3)` instead of using it 3 times. – NKN Jan 05 '16 at 14:53
2

@NKN or `rot90(I,-1)`. – beaker Jan 05 '16 at 15:57

1 Answers1