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cpp-package/example/feature_extract/prepare_data_with_opencv.cpp
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barry-jin
Add back cpp-package (#20131)
24 май 2021, 23:44
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24 май 2021, 23:44
ec119d3
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/* * Licensed to the Apache Software Foundation (ASF) under one * or more contributor license agreements. See the NOTICE file * distributed with this work for additional information * regarding copyright ownership. The ASF licenses this file * to you under the Apache License, Version 2.0 (the * "License"); you may not use this file except in compliance * with the License. You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, * software distributed under the License is distributed on an * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY * KIND, either express or implied. See the License for the * specific language governing permissions and limitations * under the License. */ /*! */ #include <fstream> #include <iostream> #include <string> #include <vector> #include <opencv2/opencv.hpp> using namespace std; /*read images and store them the NDArray format that MXNet.cpp can handle*/ void Mat2Array() { string file_name_list[] = {"./dog.jpg", "./cat.jpg"}; std::vector<float> array; for (auto &t : file_name_list) { cv::Mat mat = cv::imread(t); /*resize pictures to (224, 224) according to the pretrained model*/ cv::resize(mat, mat, cv::Size(224, 224)); for (int c = 0; c < 3; ++c) { for (int i = 0; i < 224; ++i) { for (int j = 0; j < 224; ++j) { array.push_back(static_cast<float>(mat.data[(i * 224 + j) * 3 + c])); } } } } ofstream outf("./img.dat", ios::binary); outf.write(reinterpret_cast<char *>(array.data()), array.size() * sizeof(float)); outf.close(); } int main(int argc, char *argv[]) { Mat2Array(); return 0; }