How can i know that dataaugmentation works correctly ? this function will do that ?

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Afaf Saad 2018-9-22

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关闭： MATLAB Answer Bot 2021-8-20

imageAugmenter = imageDataAugmenter( ... 'RandRotation',[90 270], ... 'RandXReflection',true)

Iam trying to rotate my images to 90, 180, 270.

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Walter Roberson 2018-9-22

rot90?

Afaf Saad 2018-9-22

I don’t understand I want to rotate every image 90 degree and 180 degree and 270 degree

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Answer 1

Image Analyst 2018-9-22

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Help says:

Range of rotation, in degrees, applied to the input image, specified as one of the following.

2-element numeric vector. The second element must be larger than or equal to the first element. The rotation angle is picked randomly from a continuous uniform distribution within the specified interval.

function handle. The function must accept no input arguments and return the rotation angle as a numeric scalar. Use a function handle to pick rotation angles from a disjoint interval or using a nonuniform probability distribution. For more information about function handles, see Create Function Handle (MATLAB).

So you need to supply a function handle instead of a 2-element range. Your function should randomly give one of the 3 values you want.

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Walter Roberson 2018-9-22

And if each image is to be rotated by each of those three values exactly once, then you should not use imageDataAugmenter, which is for making random changes.