Create an image augmenter that rotates images by a random angle. To use a custom range of valid rotation angles, you can specify a function handle when you create the augmenter. This example specifies a function called myrange (defined at the end of the example) that selects an angle from within two disjoint intervals.

imageAugmenter = imageDataAugmenter('RandRotation',@myrange);

Read multiple images into the workspace, and display the images.

img1 = imread('peppers.png');
img2 = imread('corn.tif',2);
inImg = imtile({img1,img2});
imshow(inImg)

Augment the images with identical augmentations. The randomly selected rotation angle is returned in a temporary variable, angle.

outCellArray = augment(imageAugmenter,{img1,img2});

angle = 8.1158

View the augmented images.

outImg = imtile(outCellArray);
imshow(outImg);

function angle = myrange()
    if randi([0 1],1)
        a = -10;
        b = 10;
    else
        a = 170;
        b = 190;
    end
    angle = a + (b-a).*rand(1)
end