Opencv-Pinch Filter
// define head function#ifndef PS_ALGORITHM_H_INCLUDED#define PS_ALGORITHM_H_INCLUDED#include
#include
#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/*generate the pinch distortion*/#include "PS_Algorithm.h"#include
using namespace std;using namespace cv;#define pi 3.1415926int main(){ string Img_name("4.jpg"); Mat Img; Img=imread(Img_name); Mat Img_out(Img.size(), CV_8UC3); Img.copyTo(Img_out); int width=Img.cols; int height=Img.rows; float angle = pi/2; float centreX = 0.5; float centreY = 0.5; float radius = 200; float amount=0.5; if (radius==0) radius=std::min(width, height)/2; float icentreX=width*centreX; float icentreY=height*centreY; float radius2=radius*radius; float dx,dy,new_x,new_y; float p,q,x1,y1; float distance; float a,d,t,s,c,e; for (int y=0; y
radius2 || distance==0) { new_x=x; new_y=y; } else { d = sqrt( distance / radius2 ); t = pow(sin( pi*0.5 * d ),-amount); dx =dx* t; dy =dy* t; e = 1 - d; a = angle * e * e; s = sin( a ); c = cos( a ); new_x = icentreX + c*dx - s*dy; new_y = icentreY + s*dx + c*dy; } if(new_x<0) new_x=0; if(new_x>=width-1) new_x=width-2; if(new_y<0) new_y=0; if(new_y>=height-1) new_y=height-2; x1=(int)new_x; y1=(int)new_y; p=new_x-x1; q=new_y-y1; for (int k=0; k<3; k++) { Img_out.at
(y, x)[k]=(1-p)*(1-q)*Img.at
(y1, x1)[k]+ (p)*(1-q)*Img.at
(y1,x1+1)[k]+ (1-p)*(q)*Img.at
(y1+1,x1)[k]+ (p)*(q)*Img.at
(y1+1,x1+1)[k]; } } } Show_Image(Img_out, "out"); cout<<"All is well"<
#include
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);}