读取txt内图片与标签并显示保存

txt内数据格式：

0.jpg -0.262107 -0.100013 0.125654 0.289338 -0.003868 -0.196953 0.175709 -0.185209 -0.157402 -0.143893 -0.164551 0.071440 0.179504 0.197782 
1.jpg -0.407406 -0.245312 -0.019645 0.144038 -0.149167 -0.342252 0.030410 -0.257859 -0.230051 -0.216543 -0.237201 -0.001209 0.106855 0.125133 

读取代码

/*

	1. 关键点检测部分使用
	2. 用于可视化变换后的图像
	3. 也可以用于保存变换后的图像
	4. 时间：2019.2.13
*/

#include<iostream>
#include<io.h>
#include<fstream>
#include<string>
#include<opencv.hpp>

using namespace std;
using namespace cv;

int main()
{
	const string root_dir = "G:/FacePoints/Transformed_image/";	// 变换后的图像存放路径
	const string label_dir = "G:/FacePoints/train_trans.txt";	// 变换后的文件名及标签存放路径
	const string saved_dir = "G:/FacePoints/DisplayFacePoint/";	// 保存画上了关键点的图像

	// 处理过程：读图->读标签->实时显示图/保存图
	fstream fe;
	fe.open(label_dir, ios::in);
	char Index[6000];
	int dataNum = 0;
	int pointNum = 7;

	while (fe.eof() == 0)
	{
		memset(Index, 0, 6000);
		fe.getline(Index, 6000);
		if (Index == "")
			continue;
		char filename[200] = { 0 };
		char points_str[5000] = { 0 };
		sscanf(Index, "%[^ ] %[^\n]", filename, points_str);

		// 读取关键点坐标(以图象左上角为原点)
		vector<float> points;
		char *pnext = NULL;
		char* token = strtok_s(points_str, " ", &pnext);
		while (token != NULL)
		{
			char* newToken = new char[strlen(token) + 1];
			strcpy_s(newToken, strlen(token) + 1, token);
			float tempvalue = atof(newToken);
			
			tempvalue = int(tempvalue * 40 + 20);	// 将关键点数据变换到变换后的图像上
			
			points.push_back(tempvalue);
			token = strtok_s(NULL, " ", &pnext);
			delete[]newToken;
			newToken = NULL;
		}

		// 读取图像文件
		string full_path = "";
		full_path = root_dir + filename;
		Mat image = imread(full_path);

		// 显示并保存图像
		for (int i = 0; i < pointNum; i++)
		{
			Point temp;
			temp.x = points[i];
			temp.y = points[i + pointNum];
			circle(image, temp, 0.5, Scalar(0, 0, 255), 0.5);
		}
		imshow("facePoints", image);
		waitKey(1);

		resize(image, image, Size(100, 100));
		string save_path = "";
		save_path = saved_dir + filename;
		imwrite(save_path, image);

		dataNum++;
	}
	fe.close();

	return 0;
}