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Set stop_gradient=True for some variables in SSD API. #9396

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Mar 27, 2018
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Set stop_gradient=True for some variables in SSD API. #9396

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4 changes: 4 additions & 0 deletions python/paddle/fluid/layers/detection.py
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Original file line number Diff line number Diff line change
Expand Up @@ -134,6 +134,7 @@ class number, M is number of bounding boxes. For each category
scores = nn.softmax(input=scores)
scores = ops.reshape(x=scores, shape=old_shape)
scores = nn.transpose(scores, perm=[0, 2, 1])
scores.stop_gradient = True
nmsed_outs = helper.create_tmp_variable(dtype=decoded_box.dtype)
helper.append_op(
type="multiclass_nms",
Expand All @@ -148,6 +149,7 @@ class number, M is number of bounding boxes. For each category
'score_threshold': score_threshold,
'nms_eta': 1.0
})
nmsed_outs.stop_gradient = True
return nmsed_outs


Expand Down Expand Up @@ -837,4 +839,6 @@ def _is_list_or_tuple_and_equal(data, length, err_info):
mbox_locs_concat = tensor.concat(mbox_locs, axis=1)
mbox_confs_concat = tensor.concat(mbox_confs, axis=1)

box.stop_gradient = True
var.stop_gradient = True
return mbox_locs_concat, mbox_confs_concat, box, var