NI-Vision的亚像素精度(Subpixel Accuracy) 问题: Vision Development Module中的许多处理VI的输出都具有亚像素精度,这是什么意思呢? 解答:许多图像处理VI都用到了边沿检测(Edge Detection)作为复杂计算的基础,因此这篇文档将主要针对边沿检测来解释亚像素精度。几乎所有的图像处理算法都是对图像(可以认为是一个大的数...
Edge detection operator return subpixel level edge position. Using Canny filter as differential operator. Implementing according toCarsten Steger's method. Interpolation of second partial derivatives withFacet Model method. API structContour{std::vector<cv::Point2f> points;// edge locationstd::vector<...
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Harris角用红色像素标记,SubPixel角用绿色像素标记 对于cv2.cornerSubPix()函数,必须定义停止迭代的条件。我们可以在特定的迭代次数或达到一定的精度后停止它。此外,还需要定义它将搜索角点的邻居的大小。 corners = cv.cornerSubPix( image, corners, winSize, zeroZone, criteria ) image: 输入图像,单通道 corners...
size(); i++) { // Open the image image = cv::imread(filelist[i],0); // Get the chessboard corners bool found = cv::findChessboardCorners( image, boardSize, imageCorners); // Get subpixel accuracy on the corners cv::cornerSubPix(image, imageCorners, cv::Size(5,5), cv::Size(...
( image, boardSize, imageCorners); // Get subpixel accuracy on the corners cv::cornerSubPix(image, imageCorners, cv::Size(5,5), cv::Size(-1,-1), cv::TermCriteria(cv::TermCriteria::MAX_ITER + cv::TermCriteria::EPS, 30, // max number of iterations 0.1)); // min accuracy //...
1 #include <opencv2/opencv.hpp> 2 #include <iostream> 3 4 using namespace cv; 5 using namespace std; 6 7 Mat src,src_gray; 8 9 int max_corners = 20; 10 int max_count = 50; 11 12 const char* output_title = "SubPix Result"; 13 14 void SubPixel_demo(int,void*); 15 16...
// minimum number of votes that a line // must receive before being considered int minVote; // min length for a line double minLength; // max allowed gap along the line double maxGap; public: // Default accumulator resolution is 1 pixel by 1 degree // no gap, no mimimum length Line...
然后有些VI 具有输入端,可以允许用户指定亚像素精度(Subpixel Accuracy) 。以 IMAQ Edge Tool VI为例,有个输入 10、参数是 Subpixel Information ,这是一个包含 Interpolation Type( 插值类型 )和 SubpixelAccuracy( 亚像素精度 )等输入的簇。 NI Vision 使用插值的方法来定位一个边界。Interpolation Type参数有...
// find corner positions in subpixel cornerSubPix(src_gray, corners, Size(5, 5), Size(-1, -1), criteria); for (size_t i = 0; i < corners.size(); i++) { cout << "Corner[" << i << "]: (" << corners[i].x << "," << corners[i].y << ")" << endl; } wa...