OpenCv

1, Jpg压缩

#include <opencv2\opencv.hpp>  
#include<iostream>
#include <stdio.h>
using namespace cv;
 
int main(int argc, char **argv)
{
    int p[3];
    IplImage *img = cvLoadImage("test.jpg");
    p[0] = CV_IMWRITE_JPEG_QUALITY;
    p[1] = 100;
    p[2] = 0;
    cvSaveImage("out2.jpg", img, p);
    return 0;
}

 

2，图像腐蚀与膨胀

int inflateStaticMap(const std::string &map_file, int inflate_factor)
{
    if (map_file.empty() || inflate_factor == 0) {
        return -1;
    }

    Mat src, erosion_dst;
    src = imread(map_file, IMREAD_COLOR );
    if ( src.empty() ) { return -1; }

    //![kernel]
    Mat element = getStructuringElement(MORPH_RECT,
                         Size( inflate_factor + 1, inflate_factor + 1 ),
                         Point( -1, -1 ) );
    /// Apply the erosion operation
    erode( src, erosion_dst, element);
    imwrite(map_file + ".inflate", erosion_dst);
    return 0;
}

int main (int argc, char **argv) {
    inflateStaticMap("test.jpg", 0);
}