OpenCV——旋转模糊 （二）

// define head function

#ifndef PS_ALGORITHM_H_INCLUDED

#define PS_ALGORITHM_H_INCLUDED

#include <iostream>

#include <string>

#include "cv.h"

#include "highgui.h"

#include "cxmat.hpp"

#include "cxcore.hpp"

#include "math.h"

using namespace std;

using namespace cv;

void Show_Image(Mat&, const string &);

#endif // PS_ALGORITHM_H_INCLUDED

/*

This program will generate

spin blur effect

*/

#include "PS_Algorithm.h"

#include <time.h>

using namespace std;

using namespace cv;

int main()

{

    string Img_name("4.jpg");

    Mat Img_in;

    Img_in=imread(Img_name);

    Show_Image(Img_in, Img_name);

    Mat Img_out(Img_in.size(), CV_32FC3);

    Img_in.convertTo(Img_out, CV_32FC3);

    int width=Img_in.cols;

    int height=Img_in.rows;

    int n_point=1;

    float angle=30;

    float w=angle*3.1415926/180;

    float w_2=w*w;

    int Num=3;

    int Num2=Num*Num;

    Point Center(width/2, height/2);

    float t1, t2, t3;

    int x1, y1;

    int x2, y2;

    int new_x, new_y;

    for (int y=0; y<height; y++)

    {

        for (int x=0; x<width; x++)

        {

            n_point=1;

            x1=x-Center.x;

            y1=Center.y-y;

            t1=Img_in.at<Vec3b>(y, x)[0];

            t2=Img_in.at<Vec3b>(y, x)[1];

            t3=Img_in.at<Vec3b>(y, x)[2];

            x2=x1; y2=y1;

            for (int mm=0; mm<Num; mm++)

            {

                x1=x2;

                y1=y2;

                // anticlockwise

                x2=x1-w*y1/Num-w_2*x1/Num2;

                y2=y1+w*x1/Num-w_2*y1/Num2;

                // clockwise

                //x2=x1+w*y1/Num-w_2*x1/Num2;

                //y2=y1-w*x1/Num-w_2*y1/Num2;

                new_x=x2+Center.x;

                new_y=Center.y-y2;

                if (new_x>0 && new_x<width-1 && new_y>0 && new_y<height-1)

                {

                    t1=t1+Img_in.at<Vec3b>(new_y, new_x)[0];

                    t2=t2+Img_in.at<Vec3b>(new_y, new_x)[1];

                    t3=t3+Img_in.at<Vec3b>(new_y, new_x)[2];

                    n_point++;

                }

            }

            Img_out.at<Vec3f>(y, x)[0]=t1/n_point;

            Img_out.at<Vec3f>(y, x)[1]=t2/n_point;

            Img_out.at<Vec3f>(y, x)[2]=t3/n_point;

        }

    }

    Img_out=Img_out/255.0;

    Show_Image(Img_out, "out");

    imwrite("Out.jpg", Img_out*255);

    waitKey();

}

// define the show image

#include "PS_Algorithm.h"

#include <iostream>

#include <string>

using namespace std;

using namespace cv;

void Show_Image(Mat& Image, const string& str)

{

    namedWindow(str.c_str(),CV_WINDOW_AUTOSIZE);

    imshow(str.c_str(), Image);

}

原图

效果图