painting_thumbs.ipynb

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   "source": [
    "import os\n",
    "import re\n",
    "import subprocess\n",
    "import tqdm"
   ]
  },
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   "cell_type": "code",
   "execution_count": 2,
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   "source": [
    "data_dir = os.path.expanduser('~/data/highres/')\n",
    "files = os.listdir(data_dir)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 3,
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   "source": [
    "image_re = re.compile('.*(\\.jpe?g|\\.png|\\.tiff?|\\.gif)$', re.I)\n",
    "images = [f for f in files if image_re.match(f)]"
   ]
  },
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      "\n"
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   "source": [
    "for image in tqdm.tqdm_notebook(images):\n",
    "    name, ext = os.path.splitext(image)\n",
    "    p1 = subprocess.Popen([\n",
    "            'convert', os.path.join(data_dir, image),\n",
    "            '-thumbnail', '256x256^', \n",
    "            '-gravity', 'center', \n",
    "            '-extent', '256x256',\n",
    "            os.path.join('thumbs', '256', name + '.thumb' + '.png')\n",
    "        ])\n",
    "    p1.wait()\n",
    "    # create thumbnail of 256 width\n",
    "    p2 = subprocess.Popen([\n",
    "            'convert', os.path.join(data_dir, image),\n",
    "            '-thumbnail', 'x256', \n",
    "            os.path.join('thumbs', '256w', name + '.thumb' + '.jpg')\n",
    "        ])\n",
    "    p2.wait()\n",
    "    "
   ]
  }
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