Rotating an Image
To rotate an image, use the imrotate function.
When you rotate an image, you specify the image to be rotated and
the rotation angle, in degrees. If you specify a positive rotation
angle, imrotate rotates the image counterclockwise;
if you specify a negative rotation angle, imrotate rotates
the image clockwise.
By default, imrotate creates an output image
large enough to include the entire original image. Pixels that fall
outside the boundaries of the original image are set to 0 and appear
as a black background in the output image. You can, however, specify
that the output image be the same size as the input image, using the 'crop' argument.
Similarly, imrotate uses nearest-neighbor
interpolation by default to determine the value of pixels in the output
image, but you can specify other interpolation methods. See the imrotate reference page for a list of
supported interpolation methods.
This example rotates an image 35° counterclockwise and
specifies bilinear interpolation.
I = imread('circuit.tif');
J = imrotate(I,35,'bilinear');
imshow(I)
figure, imshow(J)
 | Resizing an Image | | Cropping an Image |  |
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