DOC: Add LabelMap example

Author: thewtex

examples/LabelMap.ipynb

@@ -0,0 +1,112 @@
+{
+ "cells": [
+  {
+   "cell_type": "code",
+   "execution_count": 1,
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "Requirement already satisfied: itk-io in /home/matt/bin/miniconda3/envs/itkwidgets/lib/python3.7/site-packages (5.1.0.post1)\r\n",
+      "Requirement already satisfied: itk-core==5.1.0.post1 in /home/matt/bin/miniconda3/envs/itkwidgets/lib/python3.7/site-packages (from itk-io) (5.1.0.post1)\r\n"
+     ]
+    }
+   ],
+   "source": [
+    "# Install dependencies for this example\n",
+    "# Note: This does not include itkwidgets, itself\n",
+    "import sys\n",
+    "!{sys.executable} -m pip install itk-io"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 2,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "from urllib.request import urlretrieve\n",
+    "import os\n",
+    "\n",
+    "import itk\n",
+    "\n",
+    "from itkwidgets import view\n",
+    "import itkwidgets"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 3,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "# Download data\n",
+    "image_file_name = 'cells.nrrd'\n",
+    "if not os.path.exists(image_file_name):\n",
+    "    url = 'https://data.kitware.com/api/v1/file/5ecc803b9014a6d84e8ac8e2/download'\n",
+    "    urlretrieve(url, image_file_name)\n",
+    "label_map_file_name = 'cell_labels.nrrd'\n",
+    "if not os.path.exists(label_map_file_name):\n",
+    "    url = 'https://data.kitware.com/api/v1/file/5ecc803c9014a6d84e8ac8ea/download'\n",
+    "    urlretrieve(url, label_map_file_name)"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 4,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "image = itk.imread(image_file_name)\n",
+    "label_map = itk.imread(label_map_file_name)"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 6,
+   "metadata": {},
+   "outputs": [
+    {
+     "data": {
+      "application/vnd.jupyter.widget-view+json": {
+       "model_id": "7416595a86114b29b9cdd40676af0e84",
+       "version_major": 2,
+       "version_minor": 0
+      },
+      "text/plain": [
+       "Viewer(cmap='Grayscale', geometries=[], gradient_opacity=0.8, interpolation=False, point_sets=[], rendered_ima…"
+      ]
+     },
+     "metadata": {},
+     "output_type": "display_data"
+    }
+   ],
+   "source": [
+    "view(image, label_map=label_map, rotate=True, gradient_opacity=0.8)"
+   ]
+  }
+ ],
+ "metadata": {
+  "kernelspec": {
+   "display_name": "Python 3",
+   "language": "python",
+   "name": "python3"
+  },
+  "language_info": {
+   "codemirror_mode": {
+    "name": "ipython",
+    "version": 3
+   },
+   "file_extension": ".py",
+   "mimetype": "text/x-python",
+   "name": "python",
+   "nbconvert_exporter": "python",
+   "pygments_lexer": "ipython3",
+   "version": "3.7.6"
+  }
+ },
+ "nbformat": 4,
+ "nbformat_minor": 4
+}