OpenCV学习总结（3）- 做点基本的事情

1.缩放

void resize(InputArray src, OutputArray dst, Size dsize, double fx=0, double fy=0, int interpolation=INTER_LINEAR)

实例：改变图片尺寸

#include <opencv2/opencv.hpp>
#include <stdlib.h>

using namespace cv;

int main(void)
{
    const char *name = "D:\project_opencv\_media\1.jpg";
    Mat srcImage = imread(name);
    imshow("show src", srcImage);

    Mat dstImage;
    resize(srcImage,dstImage,Size(200,300));

    imshow("show resize", dstImage);
    waitKey(0);

    exit(EXIT_SUCCESS);
}

2.平滑

高斯模糊接口

void GaussianBlur( const Mat& src, Mat& dst, Size ksize,double sigmaX, double sigmaY=0,
int borderType=BORDER_DEFAULT );

实例：高斯模糊效果

#include <opencv2/highgui/highgui.hpp>
#include <opencv2/imgproc/imgproc.hpp>

using namespace cv;

int main()
{
    Mat srcImage = imread("D:\project_opencv\_media\1.jpg");
    //imshow("avarage filter resource", srcImage);
    waitKey(1000);

    Mat dstImage;
    GaussianBlur(srcImage, dstImage, Size(7,7), 100);

    imshow("avarage filter effect", dstImage);
    waitKey(0);

    //return 0;
}

　　

3.颜色空间转换和阈值化

void cvtColor(InputArray src, OutputArray dst, int code,int dstCn=0);

void threshold(InputArray src, OutputArray dst, double thresh, double maxval, int type);

实例：颜色转换

#include <opencv2/opencv.hpp>
#include <stdlib.h>

using namespace cv;

int main(void)
{
    const char *name = "D:\project_opencv\_media\1.jpg";
    Mat srcImage = imread(name);
    imshow("show src", srcImage);

    Mat dstImage;
    cvtColor(srcImage, dstImage, 10);

    imshow("show dst", dstImage);
    waitKey(10000);

    exit(EXIT_SUCCESS);
}