MATLAB: Rotate an image by a given angle

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I have an image. I want to rotate this image by a given angle. How do I do this?

Best Answer

To rotate an image by a given angle, you can make use of the "imrotate" function in MATLAB.

As an example :

>> I = imread('pout.tif');
>> J = imrotate(I,20);
>> imshow(J);

Related Solutions

MATLAB: Is the PNG of the figure rotated 90 degrees

When the 'PaperOrientation' property of the figure is set to 'landscape' instead of 'portrait', the subsequent call to "print" saves the figure as a PNG image using this orientation specification. This could result in an image that is rotated 90 degrees from the orientation of the original figure.

This can be verified with the following command (while the figure "fig" is open):

>> get(fig,'PaperOrientation')

In order to resolve this issue, you can insert the following line before the call to "print":

>> set(fig,'PaperOrientation','portrait');

Refer to the following documentation page for more information about the Figure Properties for Printing and Saving:

http://www.mathworks.com/help/releases/R2016a/matlab/ref/figure-properties.html

MATLAB: How to create a pictogram in MATLAB

You can use "imread" and "image" in a a for-loop to create a pictogram.

>> x = [1 2 3 4];
>> y = [2 4 3 2];
>> im = imread('peppers.png');
>> figure
>> hold on
>> xPos = [1 0.1];
>> yPos = [1 0.1];
>> for i = 1:numel(x)
>>     xPos = xPos + 1;
>>     for j = 1:y(i)
>>         image(xPos, yPos, im)
>>         yPos = yPos + 1;
>>     end
>>     yPos = [1 0.1];
>> end

Best Answer

Related Solutions

MATLAB: Is the PNG of the figure rotated 90 degrees

MATLAB: How to create a pictogram in MATLAB

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