what is difference between augmentedImageDatastore and ImageDatastore

If an ImageDatastore (e.g., imdsTrain) object has the class/label information, where is the class/label info in the augmentedImageDatastore that was derived using augmentedImageDatastore

(e.g., augmentedImageDatastore(inputSize(1:2),imdsTrain, ...

'DataAugmentation',imageAugmenter)

)?

Many thanks for your help.

Answer 1

[Simon]

Soved: I found Labels is inside augimdsTrain. But it's a private parameter, can be seen using [data,info]=read(augimdsTrain).

Thanks for those replied and viewed.

[Prasobhkumar P. P.]

Awesome, searched almost half day for this. Thank you so much

[Oluwatobi John Oluwafemi]

I needed this!

Answer 2

[Image Analyst]

With the augmented version you have to give it instructions how to modify the original image, like rotate it or scale it. So it creates modified images on the fly from original images, giving you essentially a much larger training set.

[Simon]

Hi MVP, really thank you for answering my question. However, maybe I didnot make the question clear, so I try to state it again below to see if I could get more accurate answer:

I have

imdsTrain =

ImageDatastore with properties:

Files: {

' ...\MerchData\MathWorks Cap\Hat_0.jpg';

' ...\MerchData\MathWorks Cap\Hat_123.jpg';

' ...\MerchData\MathWorks Cap\Hat_148.jpg'

... and 52 more

}

Labels: [MathWorks Cap; MathWorks Cap; MathWorks Cap ... and 52 more categorical]

AlternateFileSystemRoots: {}

ReadSize: 1

ReadFcn: @readDatastoreImage

After I ran

augimdsTrain = augmentedImageDatastore(net.Layers(1).InputSize(1:2),imdsTrain, ...

'DataAugmentation',imageAugmenter);

I got:

augimdsTrain =

augmentedImageDatastore with properties:

NumObservations: 55

Files: {55×1 cell}

AlternateFileSystemRoots: {}

MiniBatchSize: 128

DataAugmentation: [1×1 imageDataAugmenter]

ColorPreprocessing: 'none'

OutputSize: [224 224]

OutputSizeMode: 'resize'

DispatchInBackground: 0

Then question is:

The original Labe information in imdsTrain is not shown in augimdsTrain. Is it because I use the function augmentedImageDatastore wrongly, or I suppose to get the label info from another variable? I do need to know/see where the label/classification is so I can program further.

Many Thanks!