To my understanding, you have trained 80% of a data image, but want to Rotate and Crop only 10%.
For cropping,you can use ''OutputSizeMode' Name-value pair of 'augmentedImageDatastore' and set it to 'centercrop' or 'randcrop' as per your requirement.
augimdsValidation = augmentedImageDatastore([227 227],imdsValidation,'OutputSizeMode','centercrop');
For rotation, you can use 'imageDataAugmenter' in 'augmentedImageDatastore'. 'imageDataAugmenter' will use 'RandRotation' to set range of rotation.
% imageDataAugmenter use 'RandRotation' to set range of rotation.
augmenter = imageDataAugmenter('RandRotation',[0 360]);
% 'imageDataAugmenter' will passed to 'augmentedImageDatastore' as 'DataAugmentation' Name-Value pair
augimdsValidation = augmentedImageDatastore([227 227],imdsValidation,'DataAugmentation',augmenter);
You can club both to get crop and rotation both:
augmenter = imageDataAugmenter('RandRotation',[0 360]);
augimdsValidation = augmentedImageDatastore([227 227],imdsValidation,'OutputSizeMode','centercrop','DataAugmentation',augmenter);
You can refer to augmentedImageDatastore MathWorks documentation page to find more on augmentedImageDatastore and imageDataAugmenter MathWorks documentation page to find more on imageDataAugmenter.
