i have done image classification using cnn and used kfold validation. can any one help me "how to display the misclassified images in matlab?

i have done image classification using cnn. now i want to show and i want to display the misclassified images. and i have used 5fold validation for training cnn. And also can you tell me reason behind the missclassification.

Answer 1

[Siraj]

Hi!

It is my understanding that you have trained a Convolutional Neural Network (CNN) for image classification using a 5-fold validation approach and wants to display the misclassified images.

To achieve the above goal, first, make predictions on the validation/testing set using the trained CNN model. This can be done by using the “classify” function. Then identify the misclassified images by comparing the predicted labels with the actual labels.

Retrieve the indexes of the misclassified images using the “find” function. Read the misclassified image data using “readimage” and display each misclassified image using the “imshow” function.

For a better understanding I’ve attached the code below.

% Train the network
net = trainNetwork(imdsTrain, layers, options);

% Make predictions on the validation set
YPred = classify(net, imdsValidation);

% Find misclassified images
wronglyPredicted = YPred ~= imdsValidation.Labels;
misclassified_image_indexes = find(wronglyPredicted);

% Display misclassified images with actual and predicted labels
for i = 1:numel(misclassified_image_indexes)
    image_index = misclassified_image_indexes(i);
    img = readimage(imdsValidation, image_index);
    figure, imshow(img)
    title("Actual label = " + char(imdsValidation.Labels(image_index)) + " Predicted Label = " + char(YPred(image_index)))
end

To gain a better understanding of the “readimage” and “find” functions and how they are used to find and read misclassified images, you can refer to the following links:

https://www.mathworks.com/help/matlab/ref/matlab.io.datastore.imagedatastore.readimage.html

https://www.mathworks.com/help/matlab/ref/find.html

Hope this helps.