I'm trying to solve a problem in the field of transfer learning, more specifically, domain adaption where both the source domain and target domain are labeled. Basically it's to predict the orientation of different material, the output is 2 angles that indicate the orientation of fibers.
I know that deep metric learning is a powerful method to solve the problem when data is sparse. But I checked some classic algorithms such as Triplet and center loss. They mostly concentrate on classification problems where an anchor and a center is required for each class. Is it possible to implement Metric Learning for regression problems so that I can transfer the knowledge learned by one material to the other?