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Browse files- app.py +304 -0
- requirements.txt +4 -0
app.py
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| 1 |
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import gradio as gr
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| 2 |
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import numpy as np
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| 3 |
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import matplotlib.pyplot as plt
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| 4 |
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from PIL import Image, ImageDraw
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| 5 |
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import io
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| 6 |
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| 7 |
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# Créer des images de test colorées et asymétriques
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| 8 |
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def create_test_image(image_type, size=256):
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| 9 |
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"""Crée une image de test colorée avec des formes asymétriques"""
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| 10 |
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img = Image.new('RGB', (size, size), 'white')
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| 11 |
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draw = ImageDraw.Draw(img)
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| 12 |
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| 13 |
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if image_type == "licorne":
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| 14 |
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# Corps de la licorne (ellipse rose)
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| 15 |
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draw.ellipse([80, 120, 180, 200], fill='#FF69B4', outline='#FF1493', width=3)
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| 16 |
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# Corne (triangle doré) - asymétrique !
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| 17 |
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draw.polygon([125, 80, 135, 80, 130, 50], fill='#FFD700', outline='#FFA500')
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| 18 |
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# Œil
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draw.ellipse([110, 140, 120, 150], fill='black')
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| 20 |
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# Crinière (cercles colorés)
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draw.ellipse([90, 90, 110, 110], fill='#FF6347')
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draw.ellipse([140, 95, 160, 115], fill='#9370DB')
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elif image_type == "nounours":
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# Corps (cercle marron)
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draw.ellipse([90, 110, 170, 190], fill='#8B4513', outline='#654321', width=3)
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# Oreilles (asymétriques)
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draw.ellipse([100, 80, 130, 110], fill='#8B4513')
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draw.ellipse([130, 85, 160, 115], fill='#8B4513') # Légèrement décalée
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| 30 |
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# Museau
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| 31 |
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draw.ellipse([115, 140, 145, 160], fill='#DEB887')
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| 32 |
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# Yeux
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draw.ellipse([110, 125, 120, 135], fill='black')
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draw.ellipse([140, 125, 150, 135], fill='black')
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# Nez asymétrique
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draw.ellipse([125, 145, 135, 155], fill='black')
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| 37 |
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| 38 |
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elif image_type == "chat":
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# Corps (ellipse grise avec contour noir)
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draw.ellipse([90, 130, 170, 190], fill='#808080', outline='black', width=3)
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| 41 |
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# Tête
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| 42 |
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draw.ellipse([105, 90, 155, 140], fill='#808080', outline='black', width=3)
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| 43 |
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# Oreilles triangulaires (asymétriques)
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| 44 |
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draw.polygon([115, 90, 125, 70, 135, 90], fill='#808080', outline='black', width=2)
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| 45 |
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draw.polygon([125, 95, 135, 75, 145, 95], fill='#808080', outline='black', width=2) # Décalée
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| 46 |
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# Intérieur des oreilles (rose)
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| 47 |
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draw.polygon([119, 86, 124, 76, 131, 86], fill='#FFB6C1')
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| 48 |
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draw.polygon([129, 91, 134, 81, 141, 91], fill='#FFB6C1')
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| 49 |
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# Yeux (grands ronds blancs)
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| 50 |
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draw.ellipse([112, 102, 128, 118], fill='white', outline='black', width=2)
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| 51 |
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draw.ellipse([132, 102, 148, 118], fill='white', outline='black', width=2)
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| 52 |
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# Pupilles noires
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| 53 |
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draw.ellipse([118, 108, 122, 112], fill='black')
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| 54 |
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draw.ellipse([138, 108, 142, 112], fill='black')
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| 55 |
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# Museau triangulaire
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| 56 |
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draw.polygon([125, 125, 135, 125, 130, 132], fill='#FFB6C1', outline='black', width=1)
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| 57 |
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# Langue rose qui dépasse (asymétrique !)
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| 58 |
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draw.ellipse([128, 132, 140, 142], fill='#FF69B4', outline='black', width=1)
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| 59 |
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# Moustaches (asymétriques)
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| 60 |
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draw.line([90, 120, 110, 122], fill='black', width=2)
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| 61 |
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draw.line([90, 125, 110, 125], fill='black', width=2)
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| 62 |
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draw.line([150, 120, 170, 118], fill='black', width=2) # Légèrement différente
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| 63 |
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draw.line([150, 125, 170, 127], fill='black', width=2)
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| 64 |
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# Queue (courbe asymétrique noire)
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| 65 |
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draw.arc([160, 120, 200, 180], 0, 180, fill='black', width=8)
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| 66 |
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| 67 |
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return img
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| 68 |
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| 69 |
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# Définir les transformations
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| 70 |
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transformations = {
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| 71 |
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"identite": {
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| 72 |
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"name": "Identité (aucune transformation)",
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| 73 |
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"matrix": np.array([[1, 0], [0, 1]]),
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| 74 |
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"explanation": "La matrice identité ne change rien à l'image"
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| 75 |
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},
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| 76 |
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"rotation_90": {
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| 77 |
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"name": "Rotation 90° (sens horaire)",
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| 78 |
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"matrix": np.array([[0, 1], [-1, 0]]),
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| 79 |
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"explanation": "Rotation d'un quart de tour vers la droite"
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| 80 |
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},
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| 81 |
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"symetrie_h": {
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| 82 |
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"name": "Symétrie horizontale",
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| 83 |
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"matrix": np.array([[-1, 0], [0, 1]]),
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| 84 |
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"explanation": "Miroir vertical - l'image se retourne de gauche à droite"
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| 85 |
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},
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| 86 |
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"symetrie_v": {
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| 87 |
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"name": "Symétrie verticale",
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| 88 |
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"matrix": np.array([[1, 0], [0, -1]]),
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| 89 |
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"explanation": "Miroir horizontal - l'image se retourne de haut en bas"
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| 90 |
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},
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| 91 |
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"homothetie_2": {
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| 92 |
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"name": "Homothétie x2",
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| 93 |
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"matrix": np.array([[2, 0], [0, 2]]),
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| 94 |
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"explanation": "Agrandissement d'un facteur 2 dans toutes les directions"
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| 95 |
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},
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| 96 |
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"homothetie_05": {
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| 97 |
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"name": "Homothétie x0.5",
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| 98 |
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"matrix": np.array([[0.5, 0], [0, 0.5]]),
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| 99 |
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"explanation": "Réduction d'un facteur 2 dans toutes les directions"
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| 100 |
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},
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| 101 |
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"cisaillement": {
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| 102 |
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"name": "Cisaillement",
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| 103 |
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"matrix": np.array([[1, 0.5], [0, 1]]),
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| 104 |
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"explanation": "Déformation oblique - l'image 'penche' vers la droite"
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| 105 |
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}
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| 106 |
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}
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| 107 |
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| 108 |
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def draw_grid_overlay(ax, matrix, color='gray', alpha=0.3, grid_range=150, spacing=20):
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| 109 |
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"""Dessine un quadrillage transformé par la matrice"""
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| 110 |
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# Créer les points du quadrillage
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| 111 |
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x_lines = np.arange(-grid_range, grid_range + spacing, spacing)
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| 112 |
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y_lines = np.arange(-grid_range, grid_range + spacing, spacing)
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| 113 |
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| 114 |
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# Lignes verticales
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| 115 |
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for x in x_lines:
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| 116 |
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y_points = np.array([[-grid_range], [grid_range]])
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| 117 |
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x_points = np.array([[x], [x]])
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| 118 |
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| 119 |
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# Appliquer la transformation
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| 120 |
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points = np.vstack([x_points.flatten(), y_points.flatten()])
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| 121 |
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transformed = matrix @ points
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| 122 |
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| 123 |
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ax.plot(transformed[0], transformed[1], color=color, alpha=alpha, linewidth=0.8)
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| 124 |
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| 125 |
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# Lignes horizontales
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| 126 |
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for y in y_lines:
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| 127 |
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x_points = np.array([[-grid_range], [grid_range]])
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| 128 |
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y_points = np.array([[y], [y]])
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| 129 |
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| 130 |
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# Appliquer la transformation
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| 131 |
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points = np.vstack([x_points.flatten(), y_points.flatten()])
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| 132 |
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transformed = matrix @ points
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| 133 |
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| 134 |
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ax.plot(transformed[0], transformed[1], color=color, alpha=alpha, linewidth=0.8)
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| 135 |
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| 136 |
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def transform_image_pixels(img_array, matrix):
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| 137 |
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"""Transforme une image pixel par pixel avec la matrice donnée"""
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| 138 |
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height, width = img_array.shape[:2]
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| 139 |
+
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| 140 |
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# Créer une image de sortie (fond blanc)
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| 141 |
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if len(img_array.shape) == 3:
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| 142 |
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transformed = np.ones((height, width, 3), dtype=np.uint8) * 255
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| 143 |
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else:
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| 144 |
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transformed = np.ones((height, width), dtype=np.uint8) * 255
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| 145 |
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| 146 |
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# Centrer les coordonnées
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| 147 |
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center_x, center_y = width // 2, height // 2
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| 148 |
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| 149 |
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# Pour chaque pixel de l'image de sortie
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| 150 |
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for y in range(height):
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| 151 |
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for x in range(width):
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| 152 |
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# Coordonnées centrées
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| 153 |
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coord_x = x - center_x
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| 154 |
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coord_y = center_y - y # Inverser Y pour avoir origine en bas à gauche
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| 155 |
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| 156 |
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# Appliquer la transformation inverse pour trouver le pixel source
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| 157 |
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try:
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| 158 |
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inv_matrix = np.linalg.inv(matrix)
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| 159 |
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original_coord = inv_matrix @ np.array([coord_x, coord_y])
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| 160 |
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| 161 |
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# Reconvertir en coordonnées image
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| 162 |
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orig_x = int(original_coord[0] + center_x)
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| 163 |
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orig_y = int(center_y - original_coord[1])
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| 164 |
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| 165 |
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# Vérifier si le pixel source est dans l'image
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| 166 |
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if 0 <= orig_x < width and 0 <= orig_y < height:
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| 167 |
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transformed[y, x] = img_array[orig_y, orig_x]
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| 168 |
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| 169 |
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except np.linalg.LinAlgError:
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| 170 |
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# Matrice non inversible, laisser blanc
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| 171 |
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pass
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| 172 |
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| 173 |
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return transformed
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| 174 |
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| 175 |
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def apply_transformation(image_choice, transform_choice):
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| 176 |
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"""Applique la transformation et crée la visualisation comparative"""
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| 177 |
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| 178 |
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# Créer l'image de test
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| 179 |
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original_img = create_test_image(image_choice)
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| 180 |
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original_array = np.array(original_img)
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| 181 |
+
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| 182 |
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# Récupérer la transformation
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| 183 |
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transform_info = transformations[transform_choice]
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| 184 |
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matrix = transform_info["matrix"]
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| 185 |
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| 186 |
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# Transformer l'image
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| 187 |
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transformed_array = transform_image_pixels(original_array, matrix)
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| 188 |
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transformed_img = Image.fromarray(transformed_array)
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| 189 |
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| 190 |
+
# Créer la figure avec deux sous-graphiques
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| 191 |
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fig, (ax1, ax2) = plt.subplots(1, 2, figsize=(12, 6))
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| 192 |
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fig.suptitle('🦄 Transformations Matricielles 🦄', fontsize=16, fontweight='bold')
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| 193 |
+
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| 194 |
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# Image originale
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| 195 |
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ax1.imshow(original_img, extent=[-128, 128, -128, 128])
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| 196 |
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ax1.set_title('Image originale', fontsize=14, color='#FF1493', fontweight='bold',
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| 197 |
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bbox=dict(boxstyle="round,pad=0.3", facecolor='#FFB6C1', alpha=0.7))
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| 198 |
+
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| 199 |
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# Quadrillage original
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| 200 |
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draw_grid_overlay(ax1, np.eye(2), alpha=0.4)
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| 201 |
+
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| 202 |
+
# Cadre rose
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| 203 |
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for spine in ax1.spines.values():
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| 204 |
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spine.set_color('#FF1493')
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| 205 |
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spine.set_linewidth(3)
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| 206 |
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| 207 |
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ax1.set_xlim(-150, 150)
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| 208 |
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ax1.set_ylim(-150, 150)
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| 209 |
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ax1.set_aspect('equal')
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| 210 |
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ax1.grid(False)
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| 211 |
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ax1.set_xticks([])
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| 212 |
+
ax1.set_yticks([])
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| 213 |
+
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| 214 |
+
# Image transformée
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| 215 |
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ax2.imshow(transformed_img, extent=[-128, 128, -128, 128])
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| 216 |
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ax2.set_title('Après la transformation matricielle !', fontsize=14, color='#8A2BE2', fontweight='bold',
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| 217 |
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bbox=dict(boxstyle="round,pad=0.3", facecolor='#DDA0DD', alpha=0.7))
|
| 218 |
+
|
| 219 |
+
# Quadrillage fixe (même que l'original pour comparaison)
|
| 220 |
+
draw_grid_overlay(ax2, np.eye(2), alpha=0.4)
|
| 221 |
+
|
| 222 |
+
# Cadre violet
|
| 223 |
+
for spine in ax2.spines.values():
|
| 224 |
+
spine.set_color('#8A2BE2')
|
| 225 |
+
spine.set_linewidth(3)
|
| 226 |
+
|
| 227 |
+
ax2.set_xlim(-150, 150)
|
| 228 |
+
ax2.set_ylim(-150, 150)
|
| 229 |
+
ax2.set_aspect('equal')
|
| 230 |
+
ax2.grid(False)
|
| 231 |
+
ax2.set_xticks([])
|
| 232 |
+
ax2.set_yticks([])
|
| 233 |
+
|
| 234 |
+
plt.tight_layout()
|
| 235 |
+
|
| 236 |
+
# Convertir en image pour Gradio
|
| 237 |
+
buf = io.BytesIO()
|
| 238 |
+
plt.savefig(buf, format='png', dpi=100, bbox_inches='tight')
|
| 239 |
+
buf.seek(0)
|
| 240 |
+
result_img = Image.open(buf)
|
| 241 |
+
plt.close()
|
| 242 |
+
|
| 243 |
+
# Créer le texte d'explication
|
| 244 |
+
matrix_str = f"[{matrix[0,0]:4.1f}, {matrix[0,1]:4.1f}]\n[{matrix[1,0]:4.1f}, {matrix[1,1]:4.1f}]"
|
| 245 |
+
explanation = f"📐 **Matrice de transformation :**\n\n```\n{matrix_str}\n```\n\n💡 **Explication :** {transform_info['explanation']}"
|
| 246 |
+
|
| 247 |
+
return result_img, explanation
|
| 248 |
+
|
| 249 |
+
# Interface Gradio
|
| 250 |
+
def create_interface():
|
| 251 |
+
with gr.Blocks(title="🦄 Transformations Matricielles", theme=gr.themes.Soft()) as demo:
|
| 252 |
+
|
| 253 |
+
gr.Markdown("""
|
| 254 |
+
# 🦄 Transformations Matricielles 🦄
|
| 255 |
+
### Visualisez les effets de transformations matricielles sur des images !
|
| 256 |
+
""")
|
| 257 |
+
|
| 258 |
+
with gr.Row():
|
| 259 |
+
with gr.Column():
|
| 260 |
+
# Choix de l'image
|
| 261 |
+
image_choice = gr.Dropdown(
|
| 262 |
+
choices=[("Licorne 🦄", "licorne"), ("Nounours 🧸", "nounours"), ("Chat 🐱", "chat")],
|
| 263 |
+
value="licorne",
|
| 264 |
+
label="1️⃣ Choisissez votre image :"
|
| 265 |
+
)
|
| 266 |
+
|
| 267 |
+
# Choix de la transformation
|
| 268 |
+
transform_choice = gr.Dropdown(
|
| 269 |
+
choices=[(info["name"], key) for key, info in transformations.items()],
|
| 270 |
+
value="identite",
|
| 271 |
+
label="2️⃣ Choisissez votre transformation :"
|
| 272 |
+
)
|
| 273 |
+
|
| 274 |
+
# Explication de la matrice
|
| 275 |
+
explanation_text = gr.Markdown(value="", label="Matrice et explication")
|
| 276 |
+
|
| 277 |
+
# Résultat
|
| 278 |
+
result_image = gr.Image(label="Visualisation", type="pil")
|
| 279 |
+
|
| 280 |
+
# Auto-update quand on change les paramètres
|
| 281 |
+
def update_all(img_choice, trans_choice):
|
| 282 |
+
result_img, explanation = apply_transformation(img_choice, trans_choice)
|
| 283 |
+
return result_img, explanation
|
| 284 |
+
|
| 285 |
+
image_choice.change(update_all, [image_choice, transform_choice], [result_image, explanation_text])
|
| 286 |
+
transform_choice.change(update_all, [image_choice, transform_choice], [result_image, explanation_text])
|
| 287 |
+
|
| 288 |
+
# Initialisation
|
| 289 |
+
demo.load(update_all, [image_choice, transform_choice], [result_image, explanation_text])
|
| 290 |
+
|
| 291 |
+
gr.Markdown("""
|
| 292 |
+
---
|
| 293 |
+
💡 **Astuce :** Vous pouvez observer les effets des matrices sur l'image initiale :
|
| 294 |
+
- **homothétie** : les objets changent de taille
|
| 295 |
+
- **rotation** : tout tourne ensemble
|
| 296 |
+
- **cisaillement** : les images s'aplatissent
|
| 297 |
+
""")
|
| 298 |
+
|
| 299 |
+
return demo
|
| 300 |
+
|
| 301 |
+
# Lancer l'application
|
| 302 |
+
if __name__ == "__main__":
|
| 303 |
+
demo = create_interface()
|
| 304 |
+
demo.launch()
|
requirements.txt
ADDED
|
@@ -0,0 +1,4 @@
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| 1 |
+
gradio
|
| 2 |
+
numpy
|
| 3 |
+
matplotlib
|
| 4 |
+
pillow
|