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6d0261e9e4
* [Model] init pp-structurev2-layout code * [Model] init pp-structurev2-layout code * [Model] init pp-structurev2-layout code * [Model] add structurev2_layout_preprocessor * [PP-StructureV2] add postprocessor and layout detector class * [PP-StructureV2] add postprocessor and layout detector class * [PP-StructureV2] add postprocessor and layout detector class * [PP-StructureV2] add postprocessor and layout detector class * [PP-StructureV2] add postprocessor and layout detector class * [pybind] add pp-structurev2-layout model pybind * [pybind] add pp-structurev2-layout model pybind * [Bug Fix] fixed code style * [examples] add pp-structurev2-layout c++ examples * [PP-StructureV2] add python example and docs * [benchmark] add pp-structurev2-layout benchmark support
49 lines
1.4 KiB
C++
49 lines
1.4 KiB
C++
// Copyright (c) 2022 PaddlePaddle Authors. All Rights Reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#include "fastdeploy/vision/ocr/ppocr/utils/ocr_utils.h"
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namespace fastdeploy {
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namespace vision {
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namespace ocr {
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static inline float FastExp(float x) {
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union { uint32_t i; float f; } v{};
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v.i = (1 << 23) * (1.4426950409 * x + 126.93490512f);
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return v.f;
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}
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std::vector<float> Softmax(std::vector<float> &src) {
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int length = src.size();
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std::vector<float> dst;
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dst.resize(length);
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const float alpha = static_cast<float>(
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*std::max_element(&src[0], &src[0 + length]));
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float denominator{0};
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for (int i = 0; i < length; ++i) {
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dst[i] = FastExp(src[i] - alpha);
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denominator += dst[i];
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}
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for (int i = 0; i < length; ++i) {
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dst[i] /= denominator;
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}
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return dst;
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}
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} // namespace ocr
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} // namespace vision
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} // namespace fastdeploy
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