What is numComponent value in Fisherfacerecognizer constructor openCV 4.0.1 c#?

Question

im using Fisher & LBPH algorithm for face recognition in c#(emguCV). What parameters should i pass in constructor?

Im using below code

FisherFaceRecognizer objFisheigenfacerecognizer = new FisherFaceRecognizer(400, 1863.50);
LBPHFaceRecognizer objLBPeigenfacerecognizer = new LBPHFaceRecognizer(4, 8, 8, 8, 152.80);