How can I implement "triplet loss" for a CNN in neural network toolbox?

I have the R2017a version of Matlab and Neural Network Toolbox. I would like to implement face-recognition and one of the loss function of the state of the art algorithms is "Triplet loss". How can I implement it in Matlab with the Neural Network Toolbox?

Thanks.

Answer 1

[Helper]

Unfortunately, as of right now there is no way of customizing the loss function when training a neural network in MATLAB. An enhancement request has been submitted for this feature, and our development team will consider it for a future release of MATLAB

Answer 2

[Roy Talman]

Hi I was implementing this, its only preliminary and need some improvements, but it works.

https://www.mathworks.com/matlabcentral/fileexchange/65927-cnn-triplet-loss