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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>
#include <string>
#include "src/utils/utility.h"
#include "third_party/nlohmann/json.hpp"
using json = nlohmann::json;
void TopkResult::SaveToImg(const std::string &save_path) {
cv::Mat img = predictor_result_.input_image.clone();
std::ostringstream oss;
oss << predictor_result_.label_names[0] << " " << std::fixed
<< std::setprecision(2) << predictor_result_.scores[0];
std::string label_str = oss.str();
int imgWidth = img.cols;
int minFont = std::max(12, imgWidth * 2 / 100);
int maxFont = std::max(18, imgWidth * 5 / 100);
int baseline = 0;
int fontFace = 0;
double fontScale = getAdaptiveFontScale(
label_str, imgWidth, imgWidth, minFont, maxFont, 2, baseline, fontFace);
cv::Size textSize =
cv::getTextSize(label_str, fontFace, fontScale, 2, &baseline);
int rect_left = 3, rect_top = 3;
int rect_right = rect_left + textSize.width + 6;
int rect_bottom = rect_top + textSize.height + 6;
cv::Scalar bgColor(0, 0, 255);
cv::rectangle(img, cv::Point(rect_left, rect_top),
cv::Point(rect_right, rect_bottom), bgColor, cv::FILLED);
int text_x = rect_left + 3;
int text_y = rect_top + textSize.height + 2;
cv::Scalar fontColor(255, 255, 255);
cv::putText(img, label_str, cv::Point(text_x, text_y), fontFace, fontScale,
fontColor, 2, cv::LINE_AA);
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(), img);
if (!success) {
INFOE("Failed to write the image %s ", full_path.value().c_str());
exit(-1);
}
}
void TopkResult::Print() const {
std::cout << "{\n \"res\": {" << std::endl;
std::cout << " \"input_path\": {" << predictor_result_.input_path << "},"
<< std::endl;
std::cout << " \"class_ids\": {" << predictor_result_.class_ids[0] << "},"
<< std::endl;
std::cout << " \"scores\": {" << predictor_result_.scores[0] << "},"
<< std::endl;
std::cout << " \"label_names\": {" << predictor_result_.label_names[0]
<< "}," << std::endl;
std::cout << "}" << std::endl;
}
void TopkResult::SaveToJson(const std::string &save_path) const {
nlohmann::ordered_json j;
j["input_path"] = predictor_result_.input_path;
j["page_index"] = nullptr; //********
json class_ids = json::array();
for (const auto &item : predictor_result_.class_ids) {
class_ids.push_back(item);
}
json scores = json::array();
for (const auto &item : predictor_result_.scores) {
scores.push_back(item);
}
json label_names = json::array();
for (const auto &item : predictor_result_.label_names) {
label_names.push_back(item);
}
j["class_ids"] = class_ids;
j["scores"] = scores;
j["label_names"] = label_names;
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);
}
}
int TopkResult::getAdaptiveFontScale(const std::string &text, int imgWidth,
int maxWidth, int minFont, int maxFont,
int thickness, int &outBaseline,
int &outFontFace) {
int fontFace = cv::FONT_HERSHEY_SIMPLEX;
double fontScale = 1.0;
int baseline = 0;
int bestFontSize = minFont;
for (int fontSize = maxFont; fontSize >= minFont; --fontSize) {
fontScale = fontSize / 20.0; // 20为基准比例，可调
int base;
cv::Size textSize =
cv::getTextSize(text, fontFace, fontScale, thickness, &base);
if (textSize.width <= maxWidth) {
bestFontSize = fontSize;
outBaseline = base;
outFontFace = fontFace;
return fontScale;
}
}
outBaseline = 0;
outFontFace = fontFace;
return minFont / 20.0;
}
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