cvGetQuadrangleSubPix 圖像旋轉縮放
#include "cv.h"
#include "highgui.h"
#include "math.h"
int main( int argc, char** argv )
{
IplImage* src;
/* the first command line parameter must be image file name */
if( argc==2 || (src = cvLoadImage("C:\\Users\\liang.guo\\Downloads\\opencvtest\\tesseract測試\\tesseract-build\\tesseract-ocr\\vs2010\\測試\\ceshi\\word\\a.jpg", -1))!=0)
{
IplImage* dst = cvCloneImage( src );
int delta = 1;
int angle = 0;
int opt = 0; // 1: 旋轉加縮放
// 0: 僅僅旋轉
double factor;
cvNamedWindow( "src", 1 );
cvShowImage( "src", src );
for(;;)
{
float m[6];
// Matrix m looks like:
//
// [ m0 m1 m2 ] ===> [ A11 A12 b1 ]
// [ m3 m4 m5 ] [ A21 A22 b2 ]
//
CvMat M = cvMat( 2, 3, CV_32F, m );
int w = src->width;
int h = src->height;
if(opt) // 旋轉加縮放
factor = (cos(angle*CV_PI/180.) + 1.05)*2;
else // 僅僅旋轉
factor = 1;
m[0] = (float)(factor*cos(-angle*2*CV_PI/180.));
m[1] = (float)(factor*sin(-angle*2*CV_PI/180.));
m[3] = -m[1];
m[4] = m[0];
// 將旋轉中心移至圖像中間
m[2] = w*0.5f;
m[5] = h*0.5f;
// dst(x,y) = A * src(x,y) + b
cvGetQuadrangleSubPix( src, dst, &M);
for (int j=0;j<6;j++)
{
for(int jj=0;jj<6;jj++)
{
CvScalar guo =cvGet2D(src,j,jj);
CvScalar guo2 =cvGet2D(dst,j,jj);
}
}
cvNamedWindow( "dst", 1 );
cvShowImage( "dst", dst );
for( ;; )
{
if(cvWaitKey() == 27)
break;
}
angle =(int) (angle + delta) % 360;
} // for-loop
}
return 0;
}
#include "highgui.h"
#include "math.h"
int main( int argc, char** argv )
{
IplImage* src;
/* the first command line parameter must be image file name */
if( argc==2 || (src = cvLoadImage("C:\\Users\\liang.guo\\Downloads\\opencvtest\\tesseract測試\\tesseract-build\\tesseract-ocr\\vs2010\\測試\\ceshi\\word\\a.jpg", -1))!=0)
{
IplImage* dst = cvCloneImage( src );
int delta = 1;
int angle = 0;
int opt = 0; // 1: 旋轉加縮放
// 0: 僅僅旋轉
double factor;
cvNamedWindow( "src", 1 );
cvShowImage( "src", src );
for(;;)
{
float m[6];
// Matrix m looks like:
//
// [ m0 m1 m2 ] ===> [ A11 A12 b1 ]
// [ m3 m4 m5 ] [ A21 A22 b2 ]
//
CvMat M = cvMat( 2, 3, CV_32F, m );
int w = src->width;
int h = src->height;
if(opt) // 旋轉加縮放
factor = (cos(angle*CV_PI/180.) + 1.05)*2;
else // 僅僅旋轉
factor = 1;
m[0] = (float)(factor*cos(-angle*2*CV_PI/180.));
m[1] = (float)(factor*sin(-angle*2*CV_PI/180.));
m[3] = -m[1];
m[4] = m[0];
// 將旋轉中心移至圖像中間
m[2] = w*0.5f;
m[5] = h*0.5f;
// dst(x,y) = A * src(x,y) + b
cvGetQuadrangleSubPix( src, dst, &M);
for (int j=0;j<6;j++)
{
for(int jj=0;jj<6;jj++)
{
CvScalar guo =cvGet2D(src,j,jj);
CvScalar guo2 =cvGet2D(dst,j,jj);
}
}
cvNamedWindow( "dst", 1 );
cvShowImage( "dst", dst );
for( ;; )
{
if(cvWaitKey() == 27)
break;
}
angle =(int) (angle + delta) % 360;
} // for-loop
}
return 0;
}
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