piiswrong commented on a change in pull request #11183: Improve data transform
for gluon data loader
URL: https://github.com/apache/incubator-mxnet/pull/11183#discussion_r193869194
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File path: python/mxnet/gluon/data/vision/transforms.py
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@@ -268,14 +271,29 @@ class Resize(Block):
>>> transformer(image)
<NDArray 500x1000x3 @cpu(0)>
"""
- def __init__(self, size, interpolation=2):
+ def __init__(self, size, keep_aspect_ratio=True, interpolation=1):
super(Resize, self).__init__()
- if isinstance(size, numeric_types):
- size = (size, size)
- self._args = tuple(size) + (interpolation,)
+ self._keep = keep_aspect_ratio
+ self._size = size
+ self._interpolation = interpolation
def forward(self, x):
- return image.imresize(x, *self._args)
+ if isinstance(self._size, numeric_types):
+ if not self._keep:
+ wsize = self._size
+ hsize = self._size
+ else:
+ h, w, _ = x.shape
+ if h > w:
+ wsize = self._size
+ hsize = int(h * wsize / w)
+ else:
+ hsize = self._size
+ wsize = int(w * hsize / h)
+ else:
+ wsize, hsize = self._size
+ _args = tuple((wsize, hsize)) + (self._interpolation,)
Review comment:
image.imresize(x, wsize, hsize, self._interpolation)
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