WebJan 20, 2024 · Using our rectangular mask, we could extract only the region of the image that contains the person and ignore the rest. Let’s look at another example, but this time using a non-rectangular mask: # now, let's make a circular mask with a radius of 100 pixels and # apply the mask again mask = np.zeros(image.shape[:2], dtype="uint8") … WebClone via HTTPS Clone with Git or checkout with SVN using the repository’s web address.

opencvを用いた特徴量の検出（コーナー検出） - Qiita

WebJan 4, 2024 · In short, this script takes two consecutive frames and finds the corners on the first one with cv2.goodFeaturesToTrack function. After that, we compute the Optical Flow with the Lucas-Kanade algorithm using the information about the corner location. WebApr 17, 2024 · std::vector polygonPoints; I need to create a mask for the goodFeaturesToTrack function in openCV. For a rectangle, the easiest way to fill the desired area with 1 's is like this: cv::Mat mask = cv::Mat::zeros (img.rows, img.cols, CV_8U); mask (boundingbox) = 1; How do I do this with a polygon that has 10+ edges? the silent wife a. s. a. harrison

goodFeaturesToTrack vs cornerHarris - OpenCV Q&A Forum

WebJan 3, 2024 · OpenCV is a huge open-source library for computer vision, machine learning, and image processing. OpenCV supports a wide variety of programming languages like Python, C++, Java, etc. It can process images and videos to identify objects, faces, or even the handwriting of a human. When it is integrated with various libraries, such as Numpy … Webpublic static void goodFeaturesToTrack(Mat image, MatOfPoint corners, int maxCorners, double qualityLevel, double minDistance, Mat mask, int blockSize, int gradientSize, … WebDec 19, 2024 · Find distorted approximated mask. We find the bounding rectangle coordinates of the object with cv2.arcLength() and cv2.approxPolyDP() then draw this onto a mask. Find corners. We use the Shi-Tomasi Corner Detector already implemented as cv2.goodFeaturesToTrack() for corner detection. my travel agent portal khm login