How to rotate and rescale a portion of a class images in an image datastore network ?

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Mohamed Elbeialy
Mohamed Elbeialy 2020-4-3
评论： Mohammad Sami 2020-4-3
I have a network of 5 classes and looking to rotate and rescale a portion of images of specifc class , then train, test and validate the network

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回答（1 个）

Mohammad Sami
Mohammad Sami 2020-4-3
You can use the augmentedImageDataStore. It will randomly apply the specified agumentation to the images.
https://www.mathworks.com/help/deeplearning/ref/augmentedimagedatastore.html
% From Example
imageAugmenter = imageDataAugmenter( ...
'RandRotation',[-20,20], ...
'RandXTranslation',[-3 3], ...
'RandYTranslation',[-3 3])
augimds = augmentedImageDatastore(imageSize,XTrain,YTrain,'DataAugmentation',imageAugmenter);
% or
augimds = augmentedImageDatastore(imageSize,imds,'DataAugmentation',imageAugmenter);
  1 个评论
Mohammad Sami
Mohammad Sami 2020-4-3
You can combine multipe data stores using the combine function.
So create and augmenteddatastore with the images you want to rotate.
Create another datastore with rest of the images.
Then use the combine function to merge the two together.
Reference :
https://www.mathworks.com/help/matlab/ref/matlab.io.datastore.combine.html

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