7 #ifndef MSHADOW_EXTENSION_SPATIAL_POOL_H_ 8 #define MSHADOW_EXTENSION_SPATIAL_POOL_H_ 10 #include "../extension.h" 20 template<
typename Reducer,
typename SrcExp,
typename DType,
int srcdim>
22 public MakeTensorExp<PoolingExp<Reducer, SrcExp, DType, srcdim>,
23 SrcExp, srcdim, DType> {
41 : src_(src), ksize_y_(ksize_y), ksize_x_(ksize_x),
42 kstride_y_(kstride_y), kstride_x_(kstride_x) {
44 CHECK(sshape[srcdim - 1] >= ksize_x && sshape[srcdim - 2] >= ksize_y)
45 <<
"PoolingExp: kernel must be smaller than image";
46 this->src_height_ = sshape[srcdim - 2];
47 this->src_width_ = sshape[srcdim - 1];
49 this->
shape_[srcdim - 2] = (src_height_ - ksize_y) / kstride_y + 1;
50 this->
shape_[srcdim - 1] = (src_width_ - ksize_x) / kstride_x + 1;
55 : src_(src), ksize_y_(ksize_y), ksize_x_(ksize_x),
56 kstride_y_(kstride_y), kstride_x_(kstride_x) {
58 CHECK(sshape[srcdim - 1] >= ksize_x && sshape[srcdim - 2] >= ksize_y)
59 <<
"PoolingExp: kernel must be smaller than image";
60 this->src_height_ = sshape[srcdim - 2];
61 this->src_width_ = sshape[srcdim - 1];
63 this->
shape_[srcdim - 2] = pshape[0];
64 this->
shape_[srcdim - 1] = pshape[1];
80 template<
typename Reducer,
typename SrcExp,
typename DType,
int etype>
85 ::Error_Expression_Does_Not_Meet_Dimension_Req();
87 (src.
self(), ksize_y, ksize_x, kstride_y, kstride_x);
103 template<
typename Reducer,
typename SrcExp,
104 typename DType,
int etype>
109 ::Error_Expression_Does_Not_Meet_Dimension_Req();
111 (src.
self(), pshape, ksize_y, ksize_x, kstride_y, kstride_x);
116 template<
typename Reducer,
typename SrcExp,
typename DType,
int srcdim>
124 new_height_(e.
shape_[srcdim - 2]) {}
127 const index_t py = i % new_height_;
133 const index_t c = i / new_height_;
135 DType res; Reducer::SetInitValue(res);
136 for (
index_t y = y_start; y < y_end; ++y) {
137 for (
index_t x = x_start; x < x_end; ++x) {
152 #endif // MSHADOW_EXTENSION_SPATIAL_POOL_H_ index_t ksize_x_
kernel size in width
Definition: spatial_pool.h:29
Definition: expr_engine-inl.h:40
index_t src_height_
source height shape[1]
Definition: spatial_pool.h:35
used to help static type check
Definition: expr_engine-inl.h:312
index_t ksize_y_
kernel size in height
Definition: spatial_pool.h:27
Definition: optional.h:241
PoolingExp< Reducer, SrcExp, DType, ExpInfo< SrcExp >::kDim > pool(const Exp< SrcExp, DType, etype > &src, index_t ksize_y, index_t ksize_x, index_t kstride_y, index_t kstride_x)
pooling subregion results together
Definition: spatial_pool.h:82
PoolingExp(const SrcExp &src, index_t ksize_y, index_t ksize_x, index_t kstride_y, index_t kstride_x)
constructor
Definition: spatial_pool.h:39
PoolingExp(const SrcExp &src, Shape< 2 > pshape, index_t ksize_y, index_t ksize_x, index_t kstride_y, index_t kstride_x)
constructor, specify shape
Definition: spatial_pool.h:53
static Shape< dim > Check(const E &t)
#define MSHADOW_XINLINE
Definition: base.h:204
int32_t index_t
type that will be used for index
Definition: base.h:291
index_t kstride_y_
kernel stride in y directory
Definition: spatial_pool.h:31
index_t kstride_x_
kernel stride in x directory
Definition: spatial_pool.h:33
defines how expression exp can be evaluated and stored into dst
Definition: expression.h:61
index_t src_width_
source width shape[0]
Definition: spatial_pool.h:37
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
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
const SrcExp & src_
source operand
Definition: spatial_pool.h:25
Shape< dim > shape_
the shape of this expression
Definition: expr_engine-inl.h:29
MSHADOW_XINLINE DType Eval(index_t i, index_t j) const
Definition: spatial_pool.h:125
Plan(const PoolingExp< Reducer, SrcExp, DType, srcdim > &e)
Definition: spatial_pool.h:119
pooling expression, do reduction over local patches of a image
Definition: spatial_pool.h:21