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42 lines
1.2 KiB
C++
42 lines
1.2 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/utils/utils.h"
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namespace fastdeploy {
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namespace vision {
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namespace utils {
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std::vector<float> L2Normalize(const std::vector<float>& values) {
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size_t num_val = values.size();
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if (num_val == 0) {
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return {};
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}
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std::vector<float> norm;
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float l2_sum_val = 0.f;
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for (size_t i = 0; i < num_val; ++i) {
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l2_sum_val += (values[i] * values[i]);
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}
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float l2_sum_sqrt = std::sqrt(l2_sum_val);
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norm.resize(num_val);
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for (size_t i = 0; i < num_val; ++i) {
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norm[i] = values[i] / l2_sum_sqrt;
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}
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return norm;
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}
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} // namespace utils
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} // namespace vision
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} // namespace fastdeploy
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