How to use neural network classifier in predict function?

I am using App designer in MATLAB R2018a. I am working on human idetification and I have trained networks with SVM and NN.

I'm using predict function for the testing. It's working with SVM but not with NN. Kindly help

This is the code. I have NN classifier in faceClassifier variable.

queryImage = imread('image.jpg');
queryFeatures = extractHOGFeatures(queryImage);
personLabel = predict(faceClassifier,queryFeatures);

It's give me error.

Error using predict (line 84)

No valid system or dataset was specified.

Answer 1

[Akshat]

Hi @Ahmer Shahid,

The error you are facing is probably because the "faceClassifier" variable is a different object than expected by "predict". As per the documentation on "predict" (https://www.mathworks.com/help/deeplearning/ref/dlnetwork.predict.html#mw_4af36819-ecbb-46c6-9d6d-6f9397d5b8e1), you can see that "net" variable should be a "DLNetwork" object.

Now, depending on the neural network you are using, the following functions might help:

classify : https://www.mathworks.com/help/deeplearning/ref/seriesnetwork.classify.html#d126e34747

sim : https://www.mathworks.com/help/deeplearning/ref/sim.html

Hope this helps!

Answer 2

[Walter Roberson]

See https://www.mathworks.com/matlabcentral/answers/427309-classify-requires-at-least-3-arguments#answer_445205 for more information about when to call predict or classify or sim