Use retinaface to face detection alignment

Hello @yangfly @vizakshat @MyraBaba @yingfeng @nttstar
I have change the code detection code from mtcnn to retina face
`ret = self.detector.detect_face(face_img, det_type = self.args.det)` to retina face ` detector.detect(img, thresh, scales=scales, do_flip=flip)`
but when `nimg = face_preprocess.preprocess(face_img, bbox, points1, image_size='112,112')`
is called i am not getting the proper face i am getting full frame insterd of crop align face
is there anything I am missing.