[cherry-pick][MOT][MOT] fix fairmot centernet_head bias init (#4207)

* fix operators typo * fix centernet_head bias init

[cherry-pick][MOT][MOT] fix fairmot centernet_head bias init (#4207)
* fix operators typo * fix centernet_head bias init
48d8a4d3 · Feng Ni · GitHub · 40a8249c · 48d8a4d3
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ppdet/modeling/heads/centernet_head.py ppdet/modeling/heads/centernet_head.py +2 -1

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--- a/ppdet/modeling/heads/centernet_head.py
+++ b/ppdet/modeling/heads/centernet_head.py
@@ -98,6 +98,7 @@ class CenterNetHead(nn.Layer):
                stride=1,
                padding=0,
                bias=True))
+        with paddle.no_grad():
            self.heatmap[2].conv.bias[:] = -2.19
        self.size = nn.Sequential(
            ConvLayer(