rotating images matlab
rot90
Rotate matrix 90°
Syntax
B = rot90(A)
B = rot90(A,k)
Description :
| B = rot90(A) | rotates matrix A counterclockwise by 90 degrees. |
| B = rot90(A,k) | rotates matrix A counterclockwise by k*90 degrees, where k is an integer. |
Example
>> a = imread('DesertSmall.jpg'); % reading an rgb image
>> b = rgb2gray(a); % converting image to grayscale
>> c = rot90(b,1); % rotating image counterclockwise 90 deg. (1x90 = 90 deg).
>> d = rot90(b,3); % rotating image counterclockwise 270 deg.(3x90 = 270 deg).
>> subplot(2,2,1),imshow(a); title('Original Image');
>> subplot(2,2,2),imshow(b); title('Grayscale');
>> subplot(2,2,3),imshow(c); title('rotated 90');
>> subplot(2,2,4),imshow(d); title('rotated 270');
Output :
