stu1130 commented on a change in pull request #13611: add image resize operator
and unit test
URL: https://github.com/apache/incubator-mxnet/pull/13611#discussion_r240787276
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File path: src/operator/image/image_random-inl.h
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@@ -147,6 +150,140 @@ void Normalize(const nnvm::NodeAttrs &attrs,
});
}
+struct ResizeParam : public dmlc::Parameter<ResizeParam> {
+ nnvm::Tuple<int> size;
+ bool keep_ratio;
+ int interp;
+ DMLC_DECLARE_PARAMETER(ResizeParam) {
+ DMLC_DECLARE_FIELD(size)
+ .set_default(nnvm::Tuple<int>())
+ .describe("Size of new image. Could be (width, height) or (size)");
+ DMLC_DECLARE_FIELD(keep_ratio)
+ .describe("Whether to resize the short edge or both edges to `size`, "
+ "if size is give as an integer.");
+ DMLC_DECLARE_FIELD(interp)
+ .set_default(1)
+ .describe("Interpolation method for resizing. By default uses bilinear"
+ "interpolation. See OpenCV's resize function for available choices.");
+ }
+};
+
+inline std::tuple<int, int> GetHeightAndWidth(int data_h,
+ int data_w,
+ const ResizeParam& param) {
+ CHECK_LE(param.size.ndim(), 2)
+ << "Input size dimension must be 1 or 2, but got "
+ << param.size.ndim();
+ int resized_h;
+ int resized_w;
+ if (param.size.ndim() == 1) {
+ CHECK_GT(param.size[0], 0)
+ << "Input size should greater than 0, but got "
Review comment:
It's input size from python.
```F.image.resize(x, self._size, self._keep, self._interpolation)```
size=size or size=(width, height)
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