class_04_4_video_hsv.ipynb

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   "source": [
    "# <center> 👉 class_04_4 Video » _HSV Codes in realtime_ </center>"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "# Example : simple program to get HSV Codes in realtime"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "import cv2\n",
    "import numpy as np\n",
    "\n",
    "cap = cv2.VideoCapture(0)\n",
    "\n",
    "def nothing(x):\n",
    "    pass\n",
    "\n",
    "cv2.namedWindow('result') # Creating a window for later use\n",
    "h,s,v = 100,100,100 # Starting with 100's to prevent error while masking\n",
    "\n",
    "# Creating track bar\n",
    "cv2.createTrackbar('h', 'result',0,179,nothing)\n",
    "cv2.createTrackbar('s', 'result',0,255,nothing)\n",
    "cv2.createTrackbar('v', 'result',0,255,nothing)\n",
    "\n",
    "while(1):\n",
    "    _, frame = cap.read()\n",
    "    hsv = cv2.cvtColor(frame,cv2.COLOR_BGR2HSV) #converting to HSV\n",
    "\n",
    "    # get info from track bar and appy to result\n",
    "    h = cv2.getTrackbarPos('h','result')\n",
    "    s = cv2.getTrackbarPos('s','result')\n",
    "    v = cv2.getTrackbarPos('v','result')\n",
    "\n",
    "    # Normal masking algorithm\n",
    "    lower_blue = np.array([h,s,v])\n",
    "    upper_blue = np.array([180,255,255])\n",
    "\n",
    "    mask = cv2.inRange(hsv,lower_blue, upper_blue)\n",
    "\n",
    "    result = cv2.bitwise_and(frame,frame,mask = mask)\n",
    "\n",
    "    cv2.imshow('result',result)\n",
    "\n",
    "    k = cv2.waitKey(5) & 0xFF\n",
    "    if k == 27:\n",
    "        break\n",
    "\n",
    "cap.release()\n",
    "\n",
    "cv2.destroyAllWindows()"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": []
  }
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