bildverarbeitungss18-hausaufgaben/assignments/04_assignment.ipynb

{
 "cells": [
  {
   "cell_type": "markdown",
   "metadata": {
    "collapsed": true
   },
   "source": [
    "# Image Processing SS 18 - Assignment - 04\n",
    "\n",
    "### Deadline is 16.5.2016 at 8:00 o'clock\n",
    "\n",
    "Please solve the assignments together with a partner.\n",
    "I will run every notebook. Make sure the code runs through. Select `Kernel` -> `Restart & Run All` to test it.\n",
    "Please strip the output from the cells, either select `Cell` -> `All Output` -> `Clear` or use the `nb_strip_output.py` script / git hook."
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 90,
   "metadata": {},
   "outputs": [],
   "source": [
    "# display the plots inside the notebook\n",
    "%matplotlib inline"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 91,
   "metadata": {},
   "outputs": [],
   "source": [
    "import numpy as np\n",
    "import matplotlib.pyplot as plt\n",
    "import pylab\n",
    "try:\n",
    "    import urllib.request as urllib2\n",
    "except ImportError:\n",
    "    import urllib2\n",
    "\n",
    "import random\n",
    "try:\n",
    "    from StringIO import StringIO as BytesIO\n",
    "except ImportError:\n",
    "    from io import BytesIO\n",
    "    \n",
    "from PIL import Image\n",
    "\n",
    "pylab.rcParams['figure.figsize'] = (12, 12)   # This makes the plot bigger"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "# Exercise 1 - Qualify sharpness and noise - 5 Points\n",
    "\n",
    "Qualify the noise and sharpness in the images. Make a plot images, noise\n",
    "\n",
    "Please download sample picture from [here](http://sipi.usc.edu/database/misc.zip)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 92,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "'/media/sebastian/Daten/nextcloud/Documents/Programmierung/Python/BildverarbeitungSS18/Hausaufgaben'"
      ]
     },
     "execution_count": 91,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "%pwd"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 93,
   "metadata": {},
   "outputs": [],
   "source": [
    "# Load the pictures here\n",
    "\n",
    "sample_images = []\n",
    "direc = 'misc/' # directory of the sample pictures relatively to your notebook\n",
    "for number in [1,3,5,6]:\n",
    "    sample_images.append(\n",
    "        np.array(Image.open(direc+'4.2.0'+str(number)+'.tiff'))\n",
    "    )\n",
    "for name in ['house']:\n",
    "    sample_images.append(\n",
    "        np.array(Image.open(direc+name+'.tiff'))\n",
    "    )"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 94,
   "metadata": {
    "collapsed": false
   },
   "outputs": [
    {
     "data": {
      "text/plain": [
       "<Container object of 5 artists>"
      ]
     },
     "execution_count": 93,
     "metadata": {},
     "output_type": "execute_result"
    },
    {
     "data": {
      "image/png": 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      "text/plain": [
       "<matplotlib.figure.Figure at 0x7f0b553c1a20>"
      ]
     },
     "metadata": {},
     "output_type": "display_data"
    }
   ],
   "source": [
    "def qualify_noise(img):\n",
    "    def mu2(img):\n",
    "        result = []\n",
    "        for i in range(img.shape[2]):\n",
    "            result.append(np.average(img[:, :, i]))\n",
    "        return np.array(result) # [mu(r), mu(g), mu(b)]\n",
    "    \"\"\"Qualify the noise based on the std of a gaussian model.\n",
    "       You may find a window that is contant in the images.\n",
    "    \"\"\"\n",
    "    # your code here\n",
    "    WINDOW_SIZE = 128\n",
    "    SHIFT = 128\n",
    "    w, h, d = img.shape\n",
    "    std = []\n",
    "    for ox in range(0, w-WINDOW_SIZE+1, SHIFT):\n",
    "        for oy in range(0, h-WINDOW_SIZE+1, SHIFT):\n",
    "            std_sum = np.std(img[ox:ox+WINDOW_SIZE, oy:oy+WINDOW_SIZE, 0]) + \\\n",
    "                      np.std(img[ox:ox+WINDOW_SIZE, oy:oy+WINDOW_SIZE, 1]) + \\\n",
    "                      np.std(img[ox:ox+WINDOW_SIZE, oy:oy+WINDOW_SIZE, 2])\n",
    "            std.append(std_sum)\n",
    "            \n",
    "    return np.min(std)\n",
    "\n",
    "plt.bar(range(len(sample_images)), [qualify_noise(i) for i in sample_images])"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 95,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "<Container object of 5 artists>"
      ]
     },
     "execution_count": 94,
     "metadata": {},
     "output_type": "execute_result"
    },
    {
     "data": {
      "image/png": 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1xDAAALXEMAAAtcQwAAC1xDAAALXEMAAAtcQwAAC1xDAAALXEMAAAtcQwAAC1xDAAALXE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\nCz2ha4YL8QAAAABJRU5ErkJggg==\n",
      "text/plain": [
       "<matplotlib.figure.Figure at 0x7f0b55368b38>"
      ]
     },
     "metadata": {},
     "output_type": "display_data"
    }
   ],
   "source": [
    "def qualify_sharpness(img):\n",
    "    \"\"\"Qualify the sharpness based on the average pixel differences.\"\"\"\n",
    "    # your code here\n",
    "    WINDOW_SIZE = 128\n",
    "    SHIFT = 128\n",
    "    w, h, d = img.shape\n",
    "    std = []\n",
    "    for ox in range(0, w-WINDOW_SIZE+1, SHIFT):\n",
    "        for oy in range(0, h-WINDOW_SIZE+1, SHIFT):\n",
    "            std_sum = np.std(img[ox:ox+WINDOW_SIZE, oy:oy+WINDOW_SIZE, 0]) + \\\n",
    "                      np.std(img[ox:ox+WINDOW_SIZE, oy:oy+WINDOW_SIZE, 1]) + \\\n",
    "                      np.std(img[ox:ox+WINDOW_SIZE, oy:oy+WINDOW_SIZE, 2])\n",
    "            std.append(std_sum)\n",
    "            \n",
    "    return np.std(std)\n",
    "plt.bar(range(len(sample_images)), [qualify_sharpness(i) for i in sample_images])"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "Does the result match the expectations? If not what processing step can be done?/"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "# Exercise 2 - SSIM JPEG Compression - 5 Points"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 96,
   "metadata": {},
   "outputs": [],
   "source": [
    "def jpeg_enocde(img, quality):\n",
    "    pil_img = Image.fromarray(img)\n",
    "    buffer = BytesIO()\n",
    "    pil_img.save(buffer, \"JPEG\", quality=quality)\n",
    "    return buffer\n",
    "\n",
    "def jpeg_decode(buffer):\n",
    "    img = Image.open(buffer)\n",
    "    return np.array(img)\n",
    "\n",
    "def jpeg_quality_filter(img, quality):\n",
    "    as_jpeg = jpeg_enocde(img, quality)\n",
    "    return jpeg_decode(as_jpeg)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 97,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "3"
      ]
     },
     "execution_count": 96,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "images_for_jpeg = sample_images[2::]\n",
    "len(images_for_jpeg)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 98,
   "metadata": {},
   "outputs": [],
   "source": [
    "images1 = [jpeg_quality_filter(img, 1) for img in images_for_jpeg]\n",
    "images10 = [jpeg_quality_filter(img, 10) for img in images_for_jpeg]\n",
    "images50 = [jpeg_quality_filter(img, 50) for img in images_for_jpeg]\n",
    "images80 = [jpeg_quality_filter(img, 80) for img in images_for_jpeg]"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 99,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "0\n"
     ]
    },
    {
     "data": {
      "image/png": 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      "text/plain": [
       "<matplotlib.figure.Figure at 0x7f0b55220a20>"
      ]
     },
     "metadata": {},
     "output_type": "display_data"
    },
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "1\n"
     ]
    },
    {
     "data": {
      "image/png": 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EMQAAVMIYAAAqYQwAAJUwBgCAShgDAEAljAEAoBLGAABQCWMAAKiEMQAAVMIYAAAqYQwA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\n",
      "text/plain": [
       "<matplotlib.figure.Figure at 0x7f0b55239668>"
      ]
     },
     "metadata": {},
     "output_type": "display_data"
    },
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "2\n"
     ]
    },
    {
     "data": {
      "image/png": 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jAACohDEAAFTCGAAAKmEMAACVMAYAgEoYAwBAJYwBAKASxgAAUAljAACohDEAAFTCGAAA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\nAAAAAElFTkSuQmCC\n",
      "text/plain": [
       "<matplotlib.figure.Figure at 0x7f0b55308198>"
      ]
     },
     "metadata": {},
     "output_type": "display_data"
    }
   ],
   "source": [
    "def mu(img):\n",
    "    result = []\n",
    "    for i in range(img.shape[2]):\n",
    "        result.append(np.average(img[:, :, i]))\n",
    "    return np.array(result) # [mu(r), mu(g), mu(b)]\n",
    "\n",
    "def omega(img, img_mu):\n",
    "    return np.sqrt(np.average(np.square(img-img_mu))*img.shape[2])\n",
    "\n",
    "def omega2(img_x, img_x_mu, img_y, img_y_mu):\n",
    "    pixel = img_x.shape[0]*img_x.shape[1]\n",
    "    x = (img_x-img_x_mu).reshape(pixel, img_x.shape[2])\n",
    "    y = (img_y-img_y_mu).reshape(pixel, img_x.shape[2])\n",
    "    sum = 0\n",
    "    for xi, yi in zip(x, y):\n",
    "        sum += xi.dot(yi.T)\n",
    "    return sum/pixel\n",
    "    \n",
    "    #return mu((img_x-img_x_mu).T*(img_y-img_y_mu))**0.5\n",
    "\n",
    "def ssim(x, y):\n",
    "    \"\"\"The SSIM similarity measure. Use the parameters from the paper \n",
    "    as on the second to last slide from the lecture\"\"\"\n",
    "    #print(\"x\", omega(x, mu(x)))\n",
    "    #print(\"y\", omega(y, mu(y)))\n",
    "    #print(\"mu\", mu(x))\n",
    "    #print(\"xy\", omega2(x, mu(x), y, mu(y)))\n",
    "    mu_x = mu(x)\n",
    "    mu_y = mu(y)\n",
    "    o_x = omega(x, mu_x)\n",
    "    o_y = omega(y, mu_y)\n",
    "    o_xy = omega2(x, mu_x, y, mu_y)\n",
    "    c1 = 0.2\n",
    "    c2 = 0.6\n",
    "    return (2*mu_x.dot(mu_y.T)+c1) * (2*o_xy+c2) / (mu_x.dot(mu_x.T)+mu_y.dot(mu_y.T)+c1) / (o_x**2+o_y**2+c2)\n",
    "\n",
    "for i, img in enumerate(images_for_jpeg):\n",
    "    print(i)\n",
    "    compressed_images = [images1[i], images10[i], images50[i], images80[i]]\n",
    "    plt.bar(range(len(compressed_images)),\n",
    "             [ssim(img, comp) for comp in compressed_images])\n",
    "    plt.show()"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    ""
   ]
  }
 ],
 "metadata": {
  "kernelspec": {
   "display_name": "Python 3",
   "language": "python",
   "name": "python3"
  },
  "language_info": {
   "codemirror_mode": {
    "name": "ipython",
    "version": 3.0
   },
   "file_extension": ".py",
   "mimetype": "text/x-python",
   "name": "python",
   "nbconvert_exporter": "python",
   "pygments_lexer": "ipython3",
   "version": "3.5.2"
  }
 },
 "nbformat": 4,
 "nbformat_minor": 0
}