Lecture 4.9 - Mini Project # 3 - Counting Circles and Ellipses .ipynb

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    "## Mini Project # 3 - Counting Circles and Ellipses "
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    "import cv2\n",
    "import numpy as np\n",
    "\n",
    "\n",
    "#load image\n",
    "image = cv2.imread(\"images/blobs.jpg\", 0)\n",
    "cv2.imshow('image', image)\n",
    "cv2.waitKey(0)\n",
    "\n",
    "detector = cv2.SimpleBlobDetector()\n",
    "keypoints = detector.detect(image)\n",
    "\n",
    "blank = np.zeros((1,1))\n",
    "blobs = cv2.drawKeypoints(image, keypoints, blank, (0,0,255), cv2.DRAW_MATCHES_FLAGS_DRAW_RICH_KEYPOINTS)\n",
    "number_of_blobs = len(keypoints)\n",
    "\n",
    "cv2.imshow('image', blobs)\n",
    "cv2.waitKey(0)\n",
    "\n",
    "\n",
    "params = cv2.SimpleBlobDetector_Params()\n",
    "\n",
    "params.filterByArea = True\n",
    "params.minArea =100\n",
    "params.filterByInertia = True\n",
    "params.minInertiaRatio = 0.3\n",
    "#params.filterByCircularity = True\n",
    "#params.minCircularity = 0.9\n",
    "\n",
    "detector = cv2.SimpleBlobDetector(params)\n",
    "\n",
    "keypoints = detector.detect(image)\n",
    "\n",
    "blank = np.zeros((1,1))\n",
    "blobs = cv2.drawKeypoints(image, keypoints, blank, (0,255,255), cv2.DRAW_MATCHES_FLAGS_DRAW_RICH_KEYPOINTS)\n",
    "\n",
    "cv2.imshow('image', blobs)\n",
    "cv2.waitKey(0)\n",
    "\n",
    "cv2.destroyAllWindows()"
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    "**NOTE** OpenCV 3.XX, use this line of code for intializing our blob detector\n",
    "\n",
    "`detector = cv2.SimpleBlobDetector_create(params)`\n",
    "\n",
    "OpenCV 2.4.X users use this:\n",
    "\n",
    "`detector = cv2.SimpleBlobDetector()`"
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