图像增强（图像、标签变换一体化）
该代码用于
实例分割
，话不多说直接上代码
定义CImgCoordTransSeg类，头文件imgCoordTransSeg.h和CPP文件imgCoordTransSeg.cpp
#pragma once
#include <opencv2/opencv.hpp>
using namespace cv;
namespace LabTrans
{
enum TransType //变换类型
{
TRANSLATION = 0, //平移
ROTATE = 1, //旋转
FLIP_H = 2, //水平翻转
FLIP_V = 3, //垂直翻转
FLIP_HV = 4 //水平垂直翻转
};
class CImgCoordTransSeg
{
private:
Mat _src;
int _ang;
float _t_h;
float _t_w;
public:
/// <summary>
/// 用于变换图片
/// </summary>
/// <param name="src"></param>
/// <param name="ang"></param>
/// <param name="t_h"></param>
/// <param name="t_w"></param>
CImgCoordTransSeg(Mat src, int ang, float t_h, float t_w) {
_src = src;
_ang = ang;
_t_h = t_h;
_t_w = t_w;
}
/// <summary>
/// 用于变换txt
/// </summary>
/// <param name="ang"></param>
/// <param name="t_h"></param>
/// <param name="t_w"></param>
CImgCoordTransSeg(int ang, float t_h, float t_w, int h, int w) {
_ang = ang;
_t_h = t_h;
_t_w = t_w;
_src.rows = h;
_src.cols = w;
}
void translation(Mat &translated_image);
void translation(double &x, double &y);
void rotate(Mat& rotate_image);
void rotate(double& x, double& y);
void myflip(Mat& flip_image, int flipCode);
void myflip(double& x, double& y, int flipCode);
void Transform(double &x, double &y, int flags = TRANSLATION);
void Transform(Mat &dst, int flags = TRANSLATION);
};
}
#include "imgCoordTransSeg.h"
namespace LabTrans
{
/// <summary>
/// 图像平移
/// </summary>
/// <returns></returns>
void CImgCoordTransSeg::translation(Mat &translated_image)
{
float warp_values[] = { 1.0, 0.0, _t_w, 0.0, 1.0, _t_h };
Mat translation_matrix = Mat(2, 3, CV_32F, warp_values);
warpAffine(_src, translated_image, translation_matrix, _src.size());
}
/// <summary>
/// txt坐标平移
/// </summary>
/// <returns></returns>
void CImgCoordTransSeg::translation(double &x, double &y)
{
int cols = _src.cols;
int rows = _src.rows;
x *= cols;
y *= rows;
x = (x + _t_w) / cols;
y= (y + _t_h) / rows;
}
/// <summary>
/// 图片旋转
/// </summary>
/// <returns></returns>
void CImgCoordTransSeg::rotate(Mat& rotate_image)
{
_ang = -_ang;//从逆时针旋转改为顺时针旋转与坐标变换一致
Mat rotate = getRotationMatrix2D(Point2f(_src.cols / 2, _src.rows / 2), _ang, 1);
warpAffine(_src, rotate_image, rotate, _src.size());
}
/// <summary>
/// txt坐标旋转
/// </summary>
/// <returns></returns>
void CImgCoordTransSeg::rotate(double&x, double& y) {
x *= _src.cols;
y *= _src.rows;
Point2d a0 = Point2d(_src.cols / 2, _src.rows / 2);
Point2d b;
b.x = (x - a0.x) * cos(_ang * CV_PI / 180) - (y - a0.y) * sin(_ang * CV_PI / 180) + a0.x;
b.y = (x - a0.x) * sin(_ang * CV_PI / 180) + (y - a0.y) * cos(_ang * CV_PI / 180) + a0.y;
x = b.x / _src.cols;
y = b.y / _src.rows;
}
/// <summary>
/// 图片翻转
/// </summary>
/// <param name="flipCode">1表示水平翻转，0表示垂直翻转，-1表示水平垂直翻转</param>
/// <returns></returns>
void CImgCoordTransSeg::myflip(Mat& flip_image, int flipCode)
{
flip(_src, flip_image, flipCode);
}
/// <summary>
/// txt坐标翻转
/// </summary>
/// <param name="flipCode">1表示水平翻转，0表示垂直翻转，-1表示水平垂直翻转</param>
/// <returns></returns>
void CImgCoordTransSeg::myflip(double& x, double& y, int flipCode)
{
if (flipCode == 1) {
x = 1 - x;
}
else if (flipCode == 0) {
y = 1 - y;
}
else if (flipCode == -1) {
x = 1 - x;
y = 1 - y;
}
}
/// <summary>
/// 坐标点变换
/// </summary>
/// <param name="x">坐标点变换前后横坐标</param>
/// <param name="y">坐标点变换前后纵坐标</param>
///<param name="flags">变换类型，默认为平移</param>
/// <returns></returns>
void CImgCoordTransSeg::Transform(double &x, double &y, int flags)
{
if (0 == flags)//平移
{
translation(x, y);
}
else if (1 == flags) {
rotate(x, y);
}
else if (2 == flags) {
myflip(x, y, 1);
}
else if (3 == flags) {
myflip(x, y, 0);
}
else if (4 == flags) {
myflip(x, y, -1);
}
}
/// <summary>
/// 图片变换
/// </summary>
/// <param name="dst">变换结果图像</param>
///<param name="flags">变换类型，默认为平移</param>
/// <returns></returns>
void CImgCoordTransSeg::Transform(Mat &dst, int flags)
{
if (0 == flags)//平移
{
translation(dst);
}
else if (1 == flags) {
rotate(dst);
}
else if (2 == flags) {
myflip(dst, 1);
}
else if (3 == flags) {
myflip(dst, 0);
}
else if (4 == flags) {
myflip(dst, -1);
}
}
}
主函数如下
//labelTrans.cpp
//#include <Windows.h>
#include <fstream>
#include <iostream>
#include <regex>
using namespace std;
#include <opencv2\opencv.hpp>
using namespace cv;
#include "imgCoordTransSeg.h"
using namespace LabTrans;
int main()
{
#pragma region 参数设置 根据需要调整
int ang = 135; //旋转角度
int t_h = 0;
int t_w = -50; //平移距离
string strImgFormat = "png"; //图像格式
int dstFileNo = 101; //目标文件起始编号
string srcPath = "./srcImages/";//源文件路径（图像和txt文件在同一个路径）
string dstPath = "./dstImages/";//目标文件路径
#pragma endregion
cv::String folderImage = srcPath+"*."+strImgFormat;
cv::String folderTxt = srcPath + "*.txt";
std::vector<cv::String> imagePathList;
std::vector<cv::String> txtPathList;
cv::glob(folderImage, imagePathList);
cv::glob(folderTxt, txtPathList);
int nIndex = 1; //文件索引号
int nImgNum = imagePathList.size(); //图像个数
system("color 70");
cout << "------------------图像及坐标点转换------------------" << endl;
#pragma region 图像变换
for (auto src_path : imagePathList)
{
size_t pos1=src_path.find_last_of("\\");
size_t pos2 = src_path.find_last_of(".");
string fileName = src_path.substr(pos1 + 1, pos2 - pos1-1);//文件名（不含扩展名)
string dstImgFile = dstPath + format("%06d.", dstFileNo) + strImgFormat;//目标图像文件名（含路径和扩展名）
Mat src = imread(src_path);
CImgCoordTransSeg imgCt(src, ang, t_h, t_w);
Mat dst;
imgCt.Transform(dst, FLIP_HV); //图像变换
imwrite(dstImgFile, dst);
#pragma endregion
#pragma region txt坐标点转换
ifstream fileIn(srcPath+ fileName+".txt", ios::in);//源txt文件
ofstream fileOut(dstPath + format("%06d.txt", dstFileNo), ios::out);//目标txt文件
string strLine;
regex ws_re("\\s+");//空格
bool isfirstline = true;
while (std::getline(fileIn, strLine))
{
if (isfirstline) {
isfirstline = false;
}
else {
fileOut << "\n";
}
vector<string> strVecv(sregex_token_iterator(strLine.begin(), strLine.end(), ws_re, -1),sregex_token_iterator());//使用正则表达式匹配“ ”空格字符，-1为取空格之间的子字符串，使用分配器存入容器中
size_t vLen = strVecv.size();
fileOut << stoi(strVecv[0]) << " ";
double x, y;
for (auto i = 1; i < vLen; i += 2)
{
x = stod(strVecv[i]);
y = stod(strVecv[i + 1]);
imgCt.Transform(x, y, FLIP_HV); //坐标变换
if (vLen - 2 == i)
{
fileOut << x << " " << y;
}
else
{
fileOut << x << " " << y << " ";
}
}
}
#pragma endregion
std::cout << " Processing " << fileName <<": "<< nIndex*1.0 / nImgNum * 100 << "%| |"
<< nIndex << "/" << nImgNum << "\r";//进度条
nIndex++;
dstFileNo++;
}
cout << endl;
system("pause");
return 0;
}
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