Merge pull request #215 from SunAhong1993/develop

fix the DetectionOutput bug

x2paddle/op_mapper/caffe_op_mapper.py

@@ -940,7 +940,9 @@ class CaffeOpMapper(OpMapper):
             input = self.graph.get_bottom_node(node, idx=i, copy=True)
             if i == 1 and op == 'DetectionOutput':
                 input = self.graph.get_bottom_node(node, idx=i, copy=True)
-                while input is not None and input.layer_type != 'Softmax':
+                while input is not None \
+                      and input.layer_type != 'Softmax' \
+                      and input.layer_type != 'Sigmoid':
                     input = self.graph.get_bottom_node(input, idx=0, copy=True)
                 assert input is not None, 'This kind of DetectionOutput is not supported!'
                 input = self.graph.get_bottom_node(input, idx=0, copy=True)