Update models/hub *.yaml files for v2.0 (#546)

* fix #543 issue

* Update yolov3-spp.yaml

* Update yolov5-fpn.yaml

* Update yolov5-panet.yaml

Co-authored-by: Glenn Jocher <glenn.jocher@ultralytics.com>

models/hub/yolov5-panet.yaml

@@ -21,32 +21,28 @@ backbone:
    [-1, 9, BottleneckCSP, [512]],
    [-1, 1, Conv, [1024, 3, 2]], # 7-P5/32
    [-1, 1, SPP, [1024, [5, 9, 13]]],
+   [-1, 3, BottleneckCSP, [1024, False]],  # 9
   ]
 
 # YOLOv5 PANet head
 head:
-  [[-1, 3, BottleneckCSP, [1024, False]],
-   [-1, 1, Conv, [512, 1, 1]],  # 10
-
+  [[-1, 1, Conv, [512, 1, 1]],
    [-1, 1, nn.Upsample, [None, 2, 'nearest']],
    [[-1, 6], 1, Concat, [1]],  # cat backbone P4
-   [-1, 3, BottleneckCSP, [512, False]],
-   [-1, 1, Conv, [256, 1, 1]],  # 14
+   [-1, 3, BottleneckCSP, [512, False]],  # 13
 
+   [-1, 1, Conv, [256, 1, 1]],
    [-1, 1, nn.Upsample, [None, 2, 'nearest']],
    [[-1, 4], 1, Concat, [1]],  # cat backbone P3
-   [-1, 3, BottleneckCSP, [256, False]],
-   [-1, 1, nn.Conv2d, [na * (nc + 5), 1, 1]],  # 18 (P3/8-small)
+   [-1, 3, BottleneckCSP, [256, False]],  # 17 (P3/8-small)
 
-   [-2, 1, Conv, [256, 3, 2]],
+   [-1, 1, Conv, [256, 3, 2]],
    [[-1, 14], 1, Concat, [1]],  # cat head P4
-   [-1, 3, BottleneckCSP, [512, False]],
-   [-1, 1, nn.Conv2d, [na * (nc + 5), 1, 1]],  # 22 (P4/16-medium)
+   [-1, 3, BottleneckCSP, [512, False]],  # 20 (P4/16-medium)
 
-   [-2, 1, Conv, [512, 3, 2]],
+   [-1, 1, Conv, [512, 3, 2]],
    [[-1, 10], 1, Concat, [1]],  # cat head P5
-   [-1, 3, BottleneckCSP, [1024, False]],
-   [-1, 1, nn.Conv2d, [na * (nc + 5), 1, 1]],  # 26 (P5/32-large)
+   [-1, 3, BottleneckCSP, [1024, False]],  # 23 (P5/32-large)
 
-   [[], 1, Detect, [nc, anchors]],  # Detect(P5, P4, P3)
+   [[17, 20, 23], 1, Detect, [nc, anchors]],  # Detect(P5, P4, P3)
   ]