I have trained.xml file saved previously. now I want to add more training data in this file. Is there any method to do that? I have a scenario- I have trained Face recognition algorithm with some faces and saved the data in file trained.xml. now I want to add data of one more person in that file. I tried to train the algorithm with the images of that person saperately but it gives error-
Atleast two classes are required for LDA but only one class is provided. I have no idea what to do now.