How to apply a function on all images in ImageDatastore ?

I am using Imagedatastore function for classification problem but now I need to apply an function to all images in imageDatastore

YPred =classify(net,TestImages);

Answer 1

[Jeremy Hughes]

I think this is what you want.

imds = imageDatastore(files,...)
tds = transform(imds,@(img)classify(net,img));
YPred = readall(tds);

Transform a datastore

[Ardalan Jalal]

not exactly this but something like that, my test images are in grayscale level but I want to make it binary image using imbinaeize after that I want to classify it

tds = transform(imd,@(imd) ~imbinarize(imd));

[Jeremy Hughes]

You can do multiple transforms,

imds = imageDatastore(files,...);
tds = transform(imds,@(img) ~imbinarize(img));
tds = transform(tds,@(img) classify(net,img));
YPred = readall(tds);

Based on what you wrote, I want to make sure you understand that this:

@(imd) ~imbinarize(imd)

doesn't take in a datastore as an input, it takes the image data, one-by-one, and then calls imbinarize on each result.

It works as if you called

imds = imageDatastore(files);
while hasdata(imds)
    img = read(imds); % read an image from the datastore
    img = ~imbinarize(img);
    Ypred(end+1) = classify(net,img);
end

[Ardalan Jalal]

Thank you so much that was exactly what i want