modify on widerface_eval to fit infer on cpu

fluid/PaddleCV/face_detection/widerface_eval.py

@@ -44,11 +44,15 @@ def infer(args, config):
         shrink, max_shrink = get_shrink(image.size[1], image.size[0])
 
         det0 = detect_face(image, shrink)
+        if args.use_gpu:
             det1 = flip_test(image, shrink)
             [det2, det3] = multi_scale_test(image, max_shrink)
             det4 = multi_scale_test_pyramid(image, max_shrink)
             det = np.row_stack((det0, det1, det2, det3, det4))
             dets = bbox_vote(det)
+        else:
+            # when infer on cpu, use a simple case
+            dets = det0
 
         keep_index = np.where(dets[:, 4] >= args.confs_threshold)[0]
         dets = dets[keep_index, :]