70 lines
2.3 KiB
Python
70 lines
2.3 KiB
Python
import os
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import cv2
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import albumentations as A
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from albumentations.pytorch import ToTensorV2
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import numpy as np
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import random
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# === CONFIG ===
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PASTA_ORIGINAL = "dataset/original"
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PASTA_AUGMENTED = "dataset/augmented"
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NUM_AUGMENTACOES = 3 # quantas imagens gerar por imagem original
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os.makedirs(os.path.join(PASTA_AUGMENTED, "images"), exist_ok=True)
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os.makedirs(os.path.join(PASTA_AUGMENTED, "labels"), exist_ok=True)
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transform = A.Compose([
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A.HorizontalFlip(p=0.5),
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A.VerticalFlip(p=0.1),
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A.RandomBrightnessContrast(p=0.3),
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A.Rotate(limit=10, p=0.4),
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A.RandomScale(scale_limit=0.1, p=0.3),
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], bbox_params=A.BboxParams(format='yolo', label_fields=['class_labels']))
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imagens = [f for f in os.listdir(os.path.join(PASTA_ORIGINAL, "images")) if f.endswith(('.jpg', '.jpeg', '.png'))]
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for nome_img in imagens:
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caminho_img = os.path.join(PASTA_ORIGINAL, "images", nome_img)
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caminho_lbl = os.path.join(PASTA_ORIGINAL, "labels", nome_img.replace(".jpg", ".txt").replace(".jpeg", ".txt").replace(".png", ".txt"))
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if not os.path.exists(caminho_lbl):
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print(f"[!] Label ausente: {nome_img}")
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continue
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# Carrega imagem e label
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image = cv2.imread(caminho_img)
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height, width = image.shape[:2]
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with open(caminho_lbl, 'r') as f:
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linhas = f.readlines()
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bboxes = []
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class_labels = []
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for linha in linhas:
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parts = linha.strip().split()
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if len(parts) != 5:
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continue
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cls, x, y, w, h = map(float, parts)
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bboxes.append([x, y, w, h])
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class_labels.append(int(cls))
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for i in range(NUM_AUGMENTACOES):
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augmented = transform(image=image, bboxes=bboxes, class_labels=class_labels)
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img_aug = augmented['image']
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bboxes_aug = augmented['bboxes']
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labels_aug = augmented['class_labels']
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nome_base = os.path.splitext(nome_img)[0]
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nome_img_out = f"{nome_base}_aug{i}.jpg"
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nome_lbl_out = f"{nome_base}_aug{i}.txt"
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cv2.imwrite(os.path.join(PASTA_AUGMENTED, "images", nome_img_out), img_aug)
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with open(os.path.join(PASTA_AUGMENTED, "labels", nome_lbl_out), 'w') as f:
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for cls, bbox in zip(labels_aug, bboxes_aug):
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x, y, w, h = bbox
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f.write(f"{cls} {x:.6f} {y:.6f} {w:.6f} {h:.6f}\n")
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print(f"[+] Augmentado: {nome_img_out}")
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print("\n✅ Augmentation finalizado!") |