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!5904 fix image gradients height 1 bug 

Merge pull request !5904 from zhaozhenlong/cloud/issue/image_gradient_h_1
This commit is contained in:
mindspore-ci-bot 2020-09-08 20:41:55 +08:00 committed by Gitee
parent 98725bc865 b790cc1653
commit bfcff2273c
1 changed files with 12 additions and 6 deletions
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18
mindspore/nn/layer/image.py
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@ -66,13 +66,19 @@ class ImageGradients(Cell):
check = _check_input_4d(F.shape(images), "images", self.cls_name)
images = F.depend(images, check)
batch_size, depth, height, width = P.Shape()(images)
dy = images[:, :, 1:, :] - images[:, :, :height - 1, :]
dy_last = P.Fill()(P.DType()(images), (batch_size, depth, 1, width), 0)
dy = P.Concat(2)((dy, dy_last))
if height == 1:
dy = P.Fill()(P.DType()(images), (batch_size, depth, 1, width), 0)
else:
dy = images[:, :, 1:, :] - images[:, :, :height - 1, :]
dy_last = P.Fill()(P.DType()(images), (batch_size, depth, 1, width), 0)
dy = P.Concat(2)((dy, dy_last))
dx = images[:, :, :, 1:] - images[:, :, :, :width - 1]
dx_last = P.Fill()(P.DType()(images), (batch_size, depth, height, 1), 0)
dx = P.Concat(3)((dx, dx_last))
if width == 1:
dx = P.Fill()(P.DType()(images), (batch_size, depth, height, 1), 0)
else:
dx = images[:, :, :, 1:] - images[:, :, :, :width - 1]
dx_last = P.Fill()(P.DType()(images), (batch_size, depth, height, 1), 0)
dx = P.Concat(3)((dx, dx_last))
return dy, dx