opencv之图片简单压缩

版权声明：本文为博主原创文章，未经博主允许不得转载。 https://blog.csdn.net/qq_29540745/article/details/77835795

一、简单常用

#include <opencv2/opencv.hpp>    
#include<iostream>
#include <math.h>  
#include <iostream> 
using namespace std;
using namespace cv;

double T = 40;
void resize(Mat&);
void pyrDown_up(Mat&);
int main()
{
	Mat src = imread("H://学习资料//[原始文件]//IMG_0063.jpg");
	resize(src);
	pyrDown_up(src);

	waitKey();
}
void resize(Mat&src1)
{
	resize(src1, src1, Size(750, 1000), 0, 0, CV_INTER_LINEAR);
	//imshow("WindowOrg", img1);
	imshow("resize", src1);
	imwrite("H://学习资料//六级(压缩)_resize().jpg",src1);
}
void pyrDown_up(Mat&src2){
	Mat src3;
	src2.copyTo(src3);
	pyrDown(src2, src2, Size((src2.cols+1) / 2, (src2.rows+1) / 2));
	pyrUp(src3, src3, Size(src3.cols*2, src3.rows * 2));
	imshow("pryDown", src2);
	imshow("pryUp", src3);
	imwrite("H://学习资料//六级(压缩)_pyrDown().jpg", src2);
	imwrite("H://学习资料//六级(压缩)_pyrUp().jpg", src3);
}