7 #ifndef MSHADOW_EXTENSION_CROP_H_ 8 #define MSHADOW_EXTENSION_CROP_H_ 9 #include "../extension.h" 18 template<
typename SrcExp,
typename DType,
int srcdim>
21 SrcExp, srcdim, DType> {
34 CHECK_GE(this->
shape_[srcdim - 2], cshape[0]) <<
"CroppingExp: height requirement not met";
35 CHECK_GE(this->
shape_[srcdim - 1], cshape[1]) <<
"CroppingExp: width requirement not met";
36 pad_height_ = (this->
shape_[srcdim - 2] - cshape[0]) / 2;
37 pad_width_ = (this->
shape_[srcdim - 1] - cshape[1]) / 2;
38 src_height_ = this->
shape_[srcdim - 2];
39 this->
shape_[srcdim - 2] = cshape[0];
40 this->
shape_[srcdim - 1] = cshape[1];
45 : src_(src), pad_height_(start_height), pad_width_(start_width) {
47 CHECK_GE(this->
shape_[srcdim - 2], cshape[0] + start_height)
48 <<
"CroppingExp: height requirement not met";
49 CHECK_GE(this->
shape_[srcdim - 1], cshape[1] + start_width)
50 <<
"CroppingExp: width requirement not met";
51 src_height_ = this->
shape_[srcdim - 2];
52 this->
shape_[srcdim - 2] = cshape[0];
53 this->
shape_[srcdim - 1] = cshape[1];
66 template<
typename SrcExp,
typename DType,
int etype>
70 ::Error_Expression_Does_Not_Meet_Dimension_Req();
84 template<
typename SrcExp,
typename DType,
int etype>
89 ::Error_Expression_Does_Not_Meet_Dimension_Req();
91 (src.
self(), oshape, start_height, start_width);
96 template<
typename SrcExp,
typename DType,
int srcdim>
105 const index_t y = i % new_height_;
106 const index_t c = i / new_height_;
119 #endif // MSHADOW_EXTENSION_CROP_H_ CroppingExp< SrcExp, DType, ExpInfo< SrcExp >::kDim > crop(const Exp< SrcExp, DType, etype > &src, Shape< 2 > oshape)
revserse operationg of padding, cut off boundaries, crop output from center of input ...
Definition: crop.h:68
Definition: expr_engine-inl.h:40
used to help static type check
Definition: expr_engine-inl.h:312
CroppingExp(const SrcExp &src, Shape< 2 > cshape, index_t start_height, index_t start_width)
constructor
Definition: crop.h:43
static Shape< dim > Check(const E &t)
#define MSHADOW_XINLINE
Definition: base.h:204
index_t src_height_
src height
Definition: crop.h:29
index_t pad_width_
pad height
Definition: crop.h:27
int32_t index_t
type that will be used for index
Definition: base.h:291
const SrcExp & src_
source operand
Definition: crop.h:23
CroppingExp(const SrcExp &src, Shape< 2 > cshape)
constructor
Definition: crop.h:31
crop expression, cut off the boundary region, reverse operation of padding
Definition: crop.h:19
MSHADOW_XINLINE DType Eval(index_t i, index_t j) const
Definition: crop.h:103
defines how expression exp can be evaluated and stored into dst
Definition: expression.h:61
const SubType & self(void) const
Definition: expression.h:64
Plan< BinaryMapExp< OP, TA, TB, DType, etype >, DType > MakePlan(const BinaryMapExp< OP, TA, TB, DType, etype > &e)
Definition: expr_engine-inl.h:221
Plan(const CroppingExp< SrcExp, DType, srcdim > &e)
Definition: crop.h:99
a general class that allows extension that makes tensors of some shape
Definition: expr_engine-inl.h:25
namespace for mshadow
Definition: base.h:282
Shape< dim > shape_
the shape of this expression
Definition: expr_engine-inl.h:29
index_t pad_height_
pad height
Definition: crop.h:25