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//
// Licensed 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 "result.h"
#include <fstream>
#ifdef USE_FREETYPE
#include <opencv2/freetype.hpp>
#endif
#include <string>
#include "src/utils/utility.h"
#include "third_party/nlohmann/json.hpp"
using json = nlohmann::json;
#ifdef USE_FREETYPE
void TextRecResult::SaveToImg(const std::string &save_path) {
int image_width = predictor_result_.input_image.size[1];
int image_height = predictor_result_.input_image.size[0];
std::string text = predictor_result_.rec_text + "(" +
std::to_string(predictor_result_.rec_score) + ")";
int font = AdjustFontSize(image_width, text);
cv::Ptr<cv::freetype::FreeType2> ft2 = cv::freetype::createFreeType2();
ft2->loadFontData(predictor_result_.vis_font, 0);
int baseline = 0;
cv::Size text_size = ft2->getTextSize(text, font, -1, &baseline);
int row_height = text_size.height;
int new_image_height = image_height + static_cast<int>(row_height * 1.2);
cv::Mat new_image(new_image_height, image_width, CV_8UC3,
cv::Scalar(255, 255, 255));
predictor_result_.input_image.copyTo(
new_image(cv::Rect(0, 0, image_width, image_height)));
cv::Point org(0, image_height + row_height);
ft2->putText(new_image, text, org, font, cv::Scalar(0, 0, 0), -1, cv::LINE_AA,
true);
absl::StatusOr<std::string> full_path;
if (predictor_result_.input_path.empty()) {
auto now = std::chrono::system_clock::now();
auto now_time = std::chrono::system_clock::to_time_t(now);
std::stringstream ss;
ss << "output_" << std::put_time(std::localtime(&now_time), "%Y%m%d_%H%M%S")
<< ".jpg";
std::string timestamp_filename = ss.str();
INFOW("Input path is empty, will use %s instead!",
timestamp_filename.c_str());
predictor_result_.input_path = timestamp_filename;
full_path =
Utility::SmartCreateDirectoryForImage(save_path, timestamp_filename);
} else {
full_path = Utility::SmartCreateDirectoryForImage(
save_path, predictor_result_.input_path);
}
if (!full_path.ok()) {
INFOE(full_path.status().ToString().c_str());
exit(-1);
}
bool success = cv::imwrite(full_path.value(), new_image);
if (!success) {
INFOE("Error: Failed to write the image :%s ", full_path.value().c_str());
exit(-1);
}
}
int TextRecResult::AdjustFontSize(int image_width,
const std::string &text) const {
cv::Ptr<cv::freetype::FreeType2> ft2 = cv::freetype::createFreeType2();
int font_size = static_cast<int>(image_width * 0.06);
ft2->loadFontData(predictor_result_.vis_font, 0);
cv::Size text_size;
int baseline = 0;
do {
text_size = ft2->getTextSize(text, font_size, -1, &baseline);
if (text_size.width <= image_width)
break;
font_size--;
} while (font_size > 0);
return font_size;
}
#else
void TextRecResult::SaveToImg(const std::string &save_path) {
INFOW(
"OpenCV was not compiled with the freetype module (opencv_freetype), rec "
"image will be not saved.");
}
#endif
void TextRecResult::Print() const {
std::cout << "{\n \"res\": {" << std::endl;
std::cout << " \"input_path\": {" << predictor_result_.input_path << " },"
<< std::endl;
std::cout << " \"rec_text\": {" << predictor_result_.rec_text << " }"
<< std::endl;
std::cout << " \"rec_score\": {" << predictor_result_.rec_score << " }"
<< std::endl;
std::cout << "}" << std::endl;
}
void TextRecResult::SaveToJson(const std::string &save_path) const {
nlohmann::ordered_json j;
j["input_path"] = predictor_result_.input_path;
j["page_index"] = nlohmann::json::value_t::null; //********
j["rec_text"] = predictor_result_.rec_text;
j["rec_score"] = predictor_result_.rec_score;
auto full_path = Utility::SmartCreateDirectoryForJson(
save_path, predictor_result_.input_path);
if (!full_path.ok()) {
INFOE(full_path.status().ToString().c_str());
exit(-1);
}
std::ofstream file(full_path.value());
if (file.is_open()) {
file << j.dump(4);
file.close();
} else {
INFOE("Could not open file for writing: %s", save_path.c_str());
exit(-1);
}
}
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