Not able to detect the grid with the following function & parameters, however, i m able to detect the blobs with the SimpleBlobDetector. Below is the code. Any help highly appreciated
Mat img_with_keypoints;
SimpleBlobDetector::Params params;
params.minThreshold = 8;
params.maxThreshold = 250;
// Filter by Area.
params.filterByArea = true;
params.minArea = 800;
params.maxArea=25000;
// Filter by Circularity
params.filterByCircularity = true;
params.minCircularity = 0.1;
// Filter by Convexity
params.filterByConvexity = true;
params.minConvexity = 0.87;
// Filter by Inertia
params.filterByInertia = true;
params.minInertiaRatio = 0.01;
Ptr<SimpleBlobDetector> circleFinder = SimpleBlobDetector::create(params);
img_calib = imread("CalibImage.jpg");
std::vector<KeyPoint> keypoints;
circleFinder->detect(img_calib,keypoints);
std::cout <<"blobs detected: " <<keypoints.size()<<"\n";
drawKeypoints(img_calib,keypoints,img_with_keypoints,Scalar(0,0,255),DrawMatchesFlags::DRAW_RICH_KEYPOINTS);
Size patternSize = Size(27,19);
vector<Point2f> centers; //this will be filled by the detected centers;
CirclesGridFinderParameters _parameters;
_parameters.squareSize=76;
_parameters.convexHullFactor=1.1;
_parameters.gridType=CirclesGridFinderParameters::GridType::ASYMMETRIC_GRID;
_parameters.minDensity=20;
_parameters.minDistanceToAddKeypoint=70;
cv::findCirclesGrid(img_calib,patternSize,centers,CALIB_CB_ASYMMETRIC_GRID,circleFinder,_parameters );
returns false.
Processing: 2021_10_27_9_53_42_Cam1_Cali C1_Left Bottom.bmp…
