01-Reading, writing and displaying images.ipynb

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    "<img src=\"http://akhavanpour.ir/notebook/images/srttu.gif\" alt=\"SRTTU\" style=\"width: 150px;\"/>\n",
    "\n",
    "[![Azure Notebooks](https://notebooks.azure.com/launch.png)](https://notebooks.azure.com/import/gh/Alireza-Akhavan/class.vision)"
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   "source": [
    "# <div style=\"direction:rtl;text-align:right;font-family:B Lotus, B Nazanin, Tahoma\">خواندن، ذخیره کردن و نمایش تصویر با OpenCv</div>"
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   "source": [
    "<div style=\"direction:rtl;text-align:right;font-family:Tahoma\">\n",
    "با \n",
    "import\n",
    "پکیج \n",
    "OpenCV\n",
    "شروع میکنیم.\n",
    "</div>"
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    "# Press CTRL + ENTER to run this line\n",
    "# You should see an * between the [ ] on the left\n",
    "# OpenCV takes a couple seconds to import the first time\n",
    "\n",
    "import cv2"
   ]
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    "# Now let's import numpy\n",
    "# We use as np, so that everything we call on numpy, we can type np instead\n",
    "# It's short and looks neater\n",
    "\n",
    "import numpy as np "
   ]
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   "source": [
    "Let's now load our first image"
   ]
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    "# We don't need to do this again, but it's a good habit\n",
    "import cv2 \n",
    "\n",
    "# Load an image using 'imread' specifying the path to image\n",
    "input = cv2.imread('./images/input.jpg')\n",
    "\n",
    "# Our file 'input.jpg' is now loaded and stored in python \n",
    "# as a varaible we named 'image'\n",
    "\n",
    "# To display our image variable, we use 'imshow'\n",
    "# The first parameter will be title shown on image window\n",
    "# The second parameter is the image varialbe\n",
    "cv2.imshow('It is a cow!', input)\n",
    "\n",
    "# 'waitKey' allows us to input information when a image window is open\n",
    "# By leaving it blank it just waits for anykey to be pressed before \n",
    "# continuing. By placing numbers (except 0), we can specify a delay for\n",
    "# how long you keep the window open (time is in milliseconds here)\n",
    "cv2.waitKey()\n",
    "\n",
    "# This closes all open windows \n",
    "# Failure to place this will cause your program to hang\n",
    "cv2.destroyAllWindows()"
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   "source": [
    "# Same as above without the extraneous comments\n",
    "\n",
    "import cv2 \n",
    "\n",
    "input = cv2.imread('./images/input.jpg')\n",
    "\n",
    "cv2.imshow('It is a cow!', input)\n",
    "cv2.waitKey(0)\n",
    "cv2.destroyAllWindows()"
   ]
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   "cell_type": "markdown",
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   "source": [
    "### <div style=\"direction:rtl;text-align:right;font-family:B Lotus, B Nazanin, Tahoma\">نحوه ذخیره تصاویر در OpenCV</div>"
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   "source": [
    "# Import numpy\n",
    "import numpy as np"
   ]
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   "outputs": [
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     "text": [
      "(600, 800, 3)\n"
     ]
    }
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   "source": [
    "print (input.shape)"
   ]
  },
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   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "### <div style=\"direction:rtl;text-align:right;font-family:B Lotus, B Nazanin, Tahoma\">shape ابعاد تصویر را نشان میدهد.</div>\n",
    "<div style=\"direction:rtl;text-align:right;font-family:Tahoma\">\n",
    "دو بعد نخست به ترتیب نشان دهنده‌ی ارتفاع و عرض تصور می‌باشد.\n",
    "عدد 3 نیز نمایانگر وجود سه کانال رنگی است.\n",
    "</div>"
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     "text": [
      "Height of Image: 600 pixels\n",
      "Width of Image:  800 pixels\n"
     ]
    }
   ],
   "source": [
    "# Let's print each dimension of the image\n",
    "\n",
    "print ('Height of Image:', int(input.shape[0]), 'pixels')\n",
    "print ('Width of Image: ', int(input.shape[1]), 'pixels')"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "### <div style=\"direction:rtl;text-align:right;font-family:B Lotus, B Nazanin, Tahoma\">ذخیره سازی تصاویر درOpenCV</div>\n"
   ]
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     "data": {
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       "True"
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    "# Simply use 'imwrite' specificing the file name and the image to be saved\n",
    "cv2.imwrite('output.jpg', input)\n",
    "cv2.imwrite('output.png', input)"
   ]
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   "source": [
    "<div style=\"direction:rtl;text-align:right;font-family:Tahoma\">\n",
    "True به معنی این است که عملیات با موفقیت انجام شد.\n",
    "</div>"
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   "source": [
    "<div class=\"alert alert-block alert-info\">\n",
    "<div style=\"direction:rtl;text-align:right;font-family:B Lotus, B Nazanin, Tahoma\"> دانشگاه تربیت دبیر شهید رجایی<br>مباحث ویژه - آشنایی با بینایی کامپیوتر<br>علیرضا اخوان پور<br>96-97<br>\n",
    "</div>\n",
    "<a href=\"https://www.srttu.edu/\">SRTTU.edu</a> - <a href=\"http://class.vision\">Class.Vision</a> - <a href=\"http://AkhavanPour.ir\">AkhavanPour.ir</a>\n",
    "</div>"
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