From aa217a9f8a963a310ab5ee5adea56290789b845f Mon Sep 17 00:00:00 2001
From: Yang Zhang <yangzhang@live.com>
Date: Mon, 18 May 2020 10:40:01 +0800
Subject: [PATCH] Work around broadcast issue in iou_aware (#690)

---
 ppdet/modeling/anchor_heads/iou_aware.py | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/ppdet/modeling/anchor_heads/iou_aware.py b/ppdet/modeling/anchor_heads/iou_aware.py
index 9a2c4ee41..7a85a70a6 100644
--- a/ppdet/modeling/anchor_heads/iou_aware.py
+++ b/ppdet/modeling/anchor_heads/iou_aware.py
@@ -35,7 +35,9 @@ def _split_ioup(output, an_num, num_classes):
 
 def _de_sigmoid(x, eps=1e-7):
     x = fluid.layers.clip(x, eps, 1 / eps)
-    x = fluid.layers.clip((1 / x - 1.0), eps, 1 / eps)
+    one = fluid.layers.fill_constant(
+        shape=[1, 1, 1, 1], dtype=x.dtype, value=1.)
+    x = fluid.layers.clip((one / x - 1.0), eps, 1 / eps)
     x = -fluid.layers.log(x)
     return x
 
-- 
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