68 lines
2.4 KiB
C++
68 lines
2.4 KiB
C++
/****************************************************************************
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*
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* Copyright (c) 2020 Vivante Corporation
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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* DEALINGS IN THE SOFTWARE.
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*
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*****************************************************************************/
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#ifndef TIM_VX_OPS_LOCALRESPONSENORMALIZATION_H_
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#define TIM_VX_OPS_LOCALRESPONSENORMALIZATION_H_
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#include "tim/vx/builtin_op.h"
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/**
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* ## LocalResponseNormalization
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*
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* Applies Local Response Normalization along the depth dimension:
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*
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* ```
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* sqr_sum[a, b, c, d] = sum(
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* pow(input[a, b, c, d - depth_radius : d + depth_radius + 1], 2))
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* output = input / pow((bias + alpha * sqr_sum), beta)
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* output = input / pow((bias + alpha * sqr_sum), beta)
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* size : width of the 1-D normalization window.
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* bias : An offset (usually positive to avoid dividing by 0).
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* alpha : A scale factor.
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* beta : An exponent.
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* ```
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*/
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namespace tim {
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namespace vx {
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namespace ops {
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class LocalResponseNormalization : public BuiltinOp {
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public:
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LocalResponseNormalization(Graph* graph, uint32_t size, float alpha,
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float beta, float bias, int32_t axis);
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std::shared_ptr<Operation> Clone(std::shared_ptr<Graph>& graph) const override;
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protected:
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uint32_t size_;
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float alpha_;
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float beta_;
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float bias_;
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int32_t axis_;
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};
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using LRN = LocalResponseNormalization;
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} // namespace ops
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} // namespace vx
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} // namespace tim
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#endif |