{
 "cells": [
  {
   "cell_type": "markdown",
   "id": "437fa01c",
   "metadata": {},
   "source": [
    "# Métadonnées d'une image\n",
    "\n",
    "Dans ce TP, vous allez manipuler les métadonnées d'images pour ensuite les placer sur une carte.\n",
    "\n",
    "## Extraction des métadonnées\n",
    "\n",
    "Pour manipuler les images, on a besoin d'une librairie de manipulation d'images."
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "id": "5c9c7e32",
   "metadata": {},
   "outputs": [],
   "source": [
    "from PIL import Image, ExifTags"
   ]
  },
  {
   "cell_type": "markdown",
   "id": "960941d7",
   "metadata": {},
   "source": [
    "Vous venez d'importer deux modules qui vous permettrons de manipuler des images et les metadonnées (les tags exifs).\n",
    "\n",
    "### Image\n",
    "\n",
    "Pour importer une image"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "id": "cc05608c",
   "metadata": {},
   "outputs": [],
   "source": [
    "image1 = Image.open(\"image1.jpg\")\n",
    "image1"
   ]
  },
  {
   "cell_type": "markdown",
   "id": "28e7d3fe",
   "metadata": {},
   "source": [
    "Pour obtenir les données exifs on pourra utiliser la méthode `._getexif()` sur l'image."
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "id": "75ad9d0a",
   "metadata": {
    "scrolled": true
   },
   "outputs": [],
   "source": [
    "image1._getexif()"
   ]
  },
  {
   "cell_type": "markdown",
   "id": "8bddb206",
   "metadata": {},
   "source": [
    "Quel type de données est utilisé pour stocker les données exifs?"
   ]
  },
  {
   "cell_type": "raw",
   "id": "7fb64ce8",
   "metadata": {},
   "source": []
  },
  {
   "cell_type": "markdown",
   "id": "4b9c1b9e",
   "metadata": {},
   "source": [
    "Quelles sont les informations que l'on peut trouver dans les métadonnées d'une image?"
   ]
  },
  {
   "cell_type": "raw",
   "id": "7211efe2",
   "metadata": {},
   "source": []
  },
  {
   "cell_type": "markdown",
   "id": "f6496594",
   "metadata": {},
   "source": [
    "Quels problèmes a-t-on pour comprendre ce dictionnaire?"
   ]
  },
  {
   "cell_type": "raw",
   "id": "c1ea645c",
   "metadata": {},
   "source": []
  },
  {
   "cell_type": "markdown",
   "id": "356814cc",
   "metadata": {},
   "source": [
    "### Comprendre les données exifs\n",
    "\n",
    "Pour donner un sens aux clés du dictionnaire des données exifs, le module `ExifTags` a un attribut `.TAGS`."
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "id": "04a8f787",
   "metadata": {},
   "outputs": [],
   "source": [
    "ExifTags.TAGS"
   ]
  },
  {
   "cell_type": "markdown",
   "id": "545f1db5",
   "metadata": {},
   "source": [
    "Quel est ce type de données?"
   ]
  },
  {
   "cell_type": "raw",
   "id": "d5ede170",
   "metadata": {},
   "source": []
  },
  {
   "cell_type": "markdown",
   "id": "a7564aaa",
   "metadata": {},
   "source": [
    "À quelle caractéristique correspond la clé `34853`?"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "id": "00d8d07d",
   "metadata": {},
   "outputs": [],
   "source": []
  },
  {
   "cell_type": "markdown",
   "id": "9b695442",
   "metadata": {},
   "source": [
    "À quelle caractéristique correspond la clé `272`?"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "id": "c3d05add",
   "metadata": {},
   "outputs": [],
   "source": []
  },
  {
   "cell_type": "markdown",
   "id": "1eb8842b",
   "metadata": {},
   "source": [
    "À quelle caractéristique correspond la clé `306`?"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "id": "0ff2023d",
   "metadata": {},
   "outputs": [],
   "source": []
  },
  {
   "cell_type": "markdown",
   "id": "b14e7a73",
   "metadata": {},
   "source": [
    "Faire une boucle sur les données exifs de l'`image1` en affichant la description de la donnée et la donnée. "
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "id": "99f357bc",
   "metadata": {},
   "outputs": [],
   "source": []
  },
  {
   "cell_type": "markdown",
   "id": "95afa782",
   "metadata": {},
   "source": [
    "Ecrire une fonction `extrait_exit` qui prend en argument une image et qui renvoie un dictionaire contenant les données exifs (avec le clés qui doivent être la description de la donnée)."
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "id": "ce958419",
   "metadata": {},
   "outputs": [],
   "source": []
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "id": "96fb0759",
   "metadata": {},
   "outputs": [],
   "source": []
  },
  {
   "cell_type": "markdown",
   "id": "3b677187",
   "metadata": {},
   "source": [
    "### Données GPS\n",
    "\n",
    "On s'interesse plus précisement aux données GPS de l'image.\n",
    "\n",
    "Afficher les données `'GPSInfo'` de l'`image1`."
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "id": "5b901411",
   "metadata": {},
   "outputs": [],
   "source": [
    "image1._getexif()[34853]"
   ]
  },
  {
   "cell_type": "markdown",
   "id": "033a1730",
   "metadata": {},
   "source": [
    "Quel type est utilisé pour stocker les données GPS?"
   ]
  },
  {
   "cell_type": "raw",
   "id": "086ee50f",
   "metadata": {},
   "source": []
  },
  {
   "cell_type": "markdown",
   "id": "322a9278",
   "metadata": {},
   "source": [
    "Quel est le type des clés?"
   ]
  },
  {
   "cell_type": "raw",
   "id": "a140e2fd",
   "metadata": {},
   "source": []
  },
  {
   "cell_type": "markdown",
   "id": "f4f06f4c",
   "metadata": {},
   "source": [
    "Pour donner un sens à ces clés, le module `ExifTags` a un attibut `GPSTAGS` pour leur donner un sens."
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "id": "e13b29a0",
   "metadata": {},
   "outputs": [],
   "source": [
    "ExifTags.GPSTAGS"
   ]
  },
  {
   "cell_type": "markdown",
   "id": "732ece8c",
   "metadata": {},
   "source": [
    "Ecrire une fonction `extrait_gps` qui prend en argument une image et qui renvoie un dicitonnaire avec les données GPS (avec des clés compréhensibles)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "id": "dbd0945a",
   "metadata": {},
   "outputs": [],
   "source": []
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "id": "7a282a17",
   "metadata": {},
   "outputs": [],
   "source": []
  },
  {
   "cell_type": "markdown",
   "id": "77ecc152",
   "metadata": {},
   "source": [
    "La longitude et la latitude sont données sous forme de tuple (degré, minute, secondes).\n",
    "\n",
    "Pour les transformer en forme décimale, vous pouvez utiliser la fonction suivante"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "id": "c0d9ca0f",
   "metadata": {},
   "outputs": [],
   "source": [
    "def gps_to_degre(gps:tuple) -> float:\n",
    "    \"\"\"Converti des données GPS en notation décimale\n",
    "    \n",
    "    :param gps: tuple de données GPS (degré, minute, secondes)\n",
    "    :return: gps en décimal\n",
    "    \n",
    "    :example:\n",
    "    >>> gps_to_degre((48.0, 50.0, 44.85))\n",
    "    48.84579166666667\n",
    "    \n",
    "    \"\"\"\n",
    "    return gps[0] + gps[1]/60 + gps[2]/3600"
   ]
  },
  {
   "cell_type": "markdown",
   "id": "1d3726cd",
   "metadata": {},
   "source": [
    "Ecrire une fonction `ajoute_degre` qui prend en argument un dictionnaire contenant toutes les données gps et qui renvoie ces données où l'on a ajouté les clés `degreLattitude` et `degreLongitude` (calculés avec la fonction `gps_to_degre`)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "id": "d3e048d8",
   "metadata": {},
   "outputs": [],
   "source": []
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "id": "02fc0400",
   "metadata": {},
   "outputs": [],
   "source": []
  },
  {
   "cell_type": "markdown",
   "id": "bbe16539",
   "metadata": {},
   "source": [
    "Extraire les données GPS des images \n",
    "\n",
    "- `image2.jpg`\n",
    "- `image3.jpg`\n",
    "- `image4.jpg`"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "id": "8e6348e6",
   "metadata": {},
   "outputs": [],
   "source": []
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "id": "ccb0bb48",
   "metadata": {},
   "outputs": [],
   "source": []
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "id": "27e2647c",
   "metadata": {},
   "outputs": [],
   "source": []
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "id": "66c525f8",
   "metadata": {},
   "outputs": [],
   "source": []
  },
  {
   "cell_type": "markdown",
   "id": "2b0004af",
   "metadata": {},
   "source": [
    "## Folium\n",
    "\n",
    "Folium est une librairie qui permet de manipuler des cartes."
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "id": "b4e23b6c",
   "metadata": {},
   "outputs": [],
   "source": [
    "from folium import Map, Marker"
   ]
  },
  {
   "cell_type": "markdown",
   "id": "ad5694a8",
   "metadata": {},
   "source": [
    "Créer une carte"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "id": "a5822416",
   "metadata": {},
   "outputs": [],
   "source": [
    "carte = Map(location=[45.5236, -122.6750])\n",
    "marqueur = Marker(location=[45.5236, -122.6750])\n",
    "marqueur.add_to(carte)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "id": "7ce827c7",
   "metadata": {},
   "outputs": [],
   "source": [
    "carte"
   ]
  },
  {
   "cell_type": "markdown",
   "id": "e8ca713b",
   "metadata": {},
   "source": [
    "À quoi correspond la liste de nombres passés en argument de la fonction `Map` ou de `Marker`?"
   ]
  },
  {
   "cell_type": "raw",
   "id": "281f1e36",
   "metadata": {},
   "source": [
    " "
   ]
  },
  {
   "cell_type": "markdown",
   "id": "21c54fff",
   "metadata": {},
   "source": [
    "À vous de géolocaliser les images suivantes:\n",
    "\n",
    "- `image1.jpg`\n",
    "- `image2.jpg`\n",
    "- `image3.jpg`\n",
    "- `image4.jpg`"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "id": "ae1323d6",
   "metadata": {},
   "outputs": [],
   "source": []
  }
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