I am trying to detect BLUE colored CIRCLE and it's CENTER. Then draw a circle on the detected circle and a very small circle on it's center. But I get a few errors. (I am using OpenCV 3.1.0, Python 2.7 Anaconda 64 bits, PyCharm as an IDE) (Please help me using python codes) I run the following code: import cv2 import numpy as np cap = cv2.VideoCapture(0) if cap.isOpened(): while(True): frame, _ = cap.read() # blurring the frame that's captured frame_gau_blur = cv2.GaussianBlur(frame, (3, 3), 0) # converting BGR to HSV hsv = cv2.cvtColor(frame_gau_blur, cv2.COLOR_BGR2HSV) # the range of blue color in HSV lower_blue = np.array([110, 50, 50]) higher_blue = np.array([130, 255, 255]) # getting the range of blue color in frame blue_range = cv2.inRange(hsv, lower_blue, higher_blue) # getting the V channel which is the gray channel blue_s_gray = blue_range[::2] # applying HoughCircles circles = cv2.HoughCircles(blue_s_gray, cv2.HOUGH_GRADIENT, 1, 10, 100, 30, 5, 50) circles = np.uint16(np.around(circles)) for i in circles[0,:]: # drawing on detected circle and its center cv2.circle(frame,(i[0],i[1]),i[2],(0,255,0),2) cv2.circle(frame,(i[0],i[1]),2,(0,0,255),3) cv2.imshow('circles', frame) k = cv2.waitKey(5) & 0xFF if k == 27: break cv2.destroyAllWindows() else: print "Can't find camera" The error I get when I run the code is: OpenCV Error: Assertion failed (depth == CV_8U || depth == CV_16U || depth == CV_32F) in cv::cvtColor, file C:\builds\master_PackSlaveAddon-win64-vc12-static\opencv\modules\imgproc\src\color.cpp, line 7935 Traceback (most recent call last): File "C:/Users/Meliodas/PycharmProjects/OpenCV_By_Examples/code_tester.py", line 11, in hsv = cv2.cvtColor(frame_gau_blur, cv2.COLOR_BGR2HSV) cv2.error: C:\builds\master_PackSlaveAddon-win64-vc12-static\opencv\modules\imgproc\src\color.cpp:7935: error: (-215) depth == CV_8U || depth == CV_16U || depth == CV_32F in function cv::cvtColor Thanks a lot in advance for your help! Continue reading...
