我需要使用 opencv2 中可用的 HoughCircle 函数检测我拥有的眼睛图片的虹膜。所以 ,
// Read the image
src = imread("D:/001R_3.png");
if( !src.data )
{ return -1; }
/// Convert it to gray
cvtColor( src, src_gray, CV_BGR2GRAY );
/// Reduce the noise so we avoid false circle detection
GaussianBlur( src_gray, src_gray, Size(9, 9), 2, 2 );
/////////////
/// Generate grad_x and grad_y
Mat grad_x, grad_y;
Mat abs_grad_x, abs_grad_y;
Sobel( src_gray, grad_x, ddepth, 1, 0, 3, scale, delta, BORDER_DEFAULT );
convertScaleAbs( grad_x, abs_grad_x );
/// Gradient Y
//Scharr( src_gray, grad_y, ddepth, 0, 1, scale, delta, BORDER_DEFAULT );
Sobel( src_gray, grad_y, ddepth, 0, 1, 3, scale, delta, BORDER_DEFAULT );
convertScaleAbs( grad_y, abs_grad_y );
/// Total Gradient (approximate)
addWeighted( abs_grad_x, 0.5, abs_grad_y, 0.5, 0, grad );
///////////////
vector<Vec3f> circles;
/// Apply the Hough Transform to find the circles
HoughCircles( grad, circles, CV_HOUGH_GRADIENT, 1, grad.rows/8, 200, 100,0,0 );
/// Draw the circles detected
for( size_t i = 0; i < circles.size(); i++ )
{
Point center(cvRound(circles[i][0]), cvRound(circles[i][1]));
cout<<center;
int radius = cvRound(circles[i][2]);
// circle center
cout<<radius;
circle(src, center, 3, Scalar(0,255,0), -1, 8, 0 );
// circle outline
circle(src, center, radius, Scalar(0,0,255), 3, 8, 0 );
}
/// Show your results
namedWindow( "Hough Circle Transform Demo", CV_WINDOW_AUTOSIZE );
imshow( "Hough Circle Transform Demo",src );
}
所以这是我的代码,只检测到眼睛的外部部分,因为我希望检测到瞳孔和虹膜边界而这没有发生,我参考了链接OpenCV:使用霍夫圆变换检测虹膜 ,但它没有不能那样工作。代替精明的边缘检测器已经使用了sobel。请提出建议。