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How to preserve edges when rotating images

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Elysi Cochin
Elysi Cochin 2021 年 1 月 7 日
回答済み: Walter Roberson 2021 年 1 月 7 日
How can i make sure that my images dont cut off when using rotation in image augmentation
imageAugmenter = imageDataAugmenter('RandRotation',[0,360]);
In = imread('input_image.bmp');
Out = augment(imageAugmenter,In);
What additional parameters, do i need to set, to ensure the image dont get cut off at the edges

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Walter Roberson
Walter Roberson 2021 年 1 月 7 日
pad the image with nan so that it becomes sqrt(2) times its original size. Do the random rotation on that. Find the bounding box of non-nan elements and crop. Fill the remaining nan with something appropriate.
Or... don't use the image augmenter, and use imrotate with a random angle, specifying an appropriate padding strategy.

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