108 lines
4.3 KiB
Python
108 lines
4.3 KiB
Python
import json
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import os
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import glob
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def labelme_to_yolo_segmentation_batch(json_dir, output_dir, target_label="夹具1", class_id=1, img_shape=None):
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"""
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批量将 LabelMe JSON 文件转换为 YOLO 分割格式的 .txt 文件
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仅转换指定标签（如 "夹具1"），忽略其他所有标签，且不生成空文件。
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:param json_dir: 包含 LabelMe JSON 文件的目录
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:param output_dir: 输出 .txt 文件的目录
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:param target_label: 要转换的目标标签名称，如 "夹具1"
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:param class_id: 对应的 YOLO 类别 ID（通常从 0 开始）
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:param img_shape: 图像尺寸 (height, width)，如 (1440, 2506)
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"""
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if img_shape is None:
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raise ValueError("必须提供 img_shape 参数，例如 (1440, 2506)")
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# 确保输出目录存在
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os.makedirs(output_dir, exist_ok=True)
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# 获取所有 .json 文件（排除 _mask.json 等非标注文件）
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json_files = glob.glob(os.path.join(json_dir, "*.json"))
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json_files = [f for f in json_files if os.path.isfile(f) and not f.endswith("_mask.json")]
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if not json_files:
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print(f"❌ 在 {json_dir} 中未找到任何 JSON 文件")
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return
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img_h, img_w = img_shape
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converted_count = 0
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skipped_count = 0
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print(f"🔍 开始转换，仅处理标签: '{target_label}' (映射为 class_id={class_id})")
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for json_file in json_files:
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try:
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with open(json_file, 'r', encoding='utf-8') as f:
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data = json.load(f)
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# 获取文件名（不含扩展名）
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base_name = os.path.splitext(os.path.basename(json_file))[0]
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output_path = os.path.join(output_dir, f"{base_name}.txt")
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has_valid_shapes = False # 标记是否有目标标签
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# 打开输出文件准备写入
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with open(output_path, 'w', encoding='utf-8') as out_f:
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for shape in data.get('shapes', []):
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label = shape['label']
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points = shape['points']
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# 只处理目标标签
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if label != target_label:
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continue
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# 归一化坐标
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normalized = []
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for x, y in points:
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nx = max(0.0, min(1.0, x / img_w))
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ny = max(0.0, min(1.0, y / img_h))
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normalized.append(f"{nx:.6f}")
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normalized.append(f"{ny:.6f}")
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# 写入 YOLO 行
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line = f"{class_id} {' '.join(normalized)}"
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out_f.write(line + '\n')
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has_valid_shapes = True
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# 如果没有找到目标标签，删除空文件
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if not has_valid_shapes:
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os.remove(output_path)
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print(f"🟡 跳过: {os.path.basename(json_file)} -> 未包含 '{target_label}'，不生成 .txt")
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skipped_count += 1
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else:
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print(f"✅ 已转换: {os.path.basename(json_file)} -> {os.path.basename(output_path)}")
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converted_count += 1
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except Exception as e:
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print(f"❌ 转换失败 {json_file}: {e}")
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if os.path.exists(output_path):
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os.remove(output_path) # 删除可能生成的空文件
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print("\n" + "="*50)
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print(f"🎉 批量转换完成！")
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print(f"📊 转换文件数: {converted_count}")
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print(f"📊 跳过文件数: {skipped_count}")
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print(f"📁 输出目录: {output_dir}")
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print("="*50)
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# ================== 用户配置区 ==================
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JSON_DIR = "/home/hx/yolo/yolo11_seg/folder_end" # LabelMe JSON 文件夹路径
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OUTPUT_DIR = "labels" # 输出 YOLO 标注文件夹
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TARGET_LABEL = "夹具1" # 只转换这个标签
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CLASS_ID = 1 # YOLO 中该类的 ID
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IMG_SHAPE = (1440, 2506) # 图像实际尺寸 (高度, 宽度)
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# ================== 执行转换 ==================
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if __name__ == "__main__":
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print(f"🚀 开始转换 LabelMe → YOLO (仅 '{TARGET_LABEL}')")
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labelme_to_yolo_segmentation_batch(
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json_dir=JSON_DIR,
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output_dir=OUTPUT_DIR,
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target_label=TARGET_LABEL,
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class_id=CLASS_ID,
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img_shape=IMG_SHAPE
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) |