I followed a blob detection example (using cv2.SimpleBlobDetector) and successfully detected the blobs in my binary image. But then I don't know how to extract the coordinates and area of the keypoints. Here are the code for the blob detections:
# I skipped the parameter setting part. blobParams = cv2.SimpleBlobDetector_Params() blobVer = (cv2.__version__).split('.') if int(blobVer) < 3: detector = cv2.SimpleBlobDetector(blobParams) else: detector = cv2.SimpleBlobDetector_create(blobParams) # Detect Blobs keypoints_black = detector.detect(255-black_blob) trans_blobs = cv2.drawKeypoints(gray_video_crop, \ keypoints_white, np.array(), (0,0,255), cv2.DRAW_MATCHES_FLAGS_DRAW_RICH_KEYPOINTS)
So the variable keypoints_black contains the information of the blob(s). When I printed the variable it looked something like this (2 blobs were found):
KeyPoint 0x10b10b870, KeyPoint 0x10b1301b0
So how to I get the coordinates of the centre of mass of the keypoints and their area so that I can send them as osc messages for interaction.
All the best,