164 lines
6.3 KiB
Python
164 lines
6.3 KiB
Python
from gps_extractor import GPSExtractor
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from gps_filter import GPSFilter
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from grid_divider import GridDivider
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from logger import setup_logger
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import os
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import pandas as pd
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import shutil
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import matplotlib.pyplot as plt
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from typing import List, Dict, Optional
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from dataclasses import dataclass
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from tqdm import tqdm
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@dataclass
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class PreprocessConfig:
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"""预处理配置类"""
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image_dir: str
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output_dir: str
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filter_grid_size: float = 0.001
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filter_dense_distance_threshold: float = 10
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filter_distance_threshold: float = 0.001
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filter_min_neighbors: int = 6
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grid_overlap: float = 0.05
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enable_filter: bool = True
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enable_grid_division: bool = True
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enable_visualization: bool = True
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class ImagePreprocessor:
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def __init__(self, config: PreprocessConfig):
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self.config = config
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self.logger = setup_logger(config.output_dir)
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self.gps_points = []
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def extract_gps(self) -> List[Dict]:
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"""提取GPS数据"""
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self.logger.info("开始提取GPS数据")
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extractor = GPSExtractor(self.config.image_dir)
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self.gps_points = extractor.extract_all_gps()
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self.logger.info(f"成功提取 {len(self.gps_points)} 个GPS点")
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return self.gps_points
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def filter_points(self) -> List[Dict]:
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"""过滤GPS点"""
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if not self.config.enable_filter:
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return self.gps_points
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self.logger.info("开始过滤GPS点")
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filter = GPSFilter(self.config.output_dir)
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self.logger.info(f"开始过滤孤立点 (距离阈值: {self.config.filter_distance_threshold}, 最小邻居数: {
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self.config.filter_min_neighbors})")
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self.gps_points = filter.filter_isolated_points(
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self.gps_points,
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self.config.filter_distance_threshold,
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self.config.filter_min_neighbors
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)
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self.logger.info(f"孤立点过滤后剩余 {len(self.gps_points)} 个GPS点")
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self.logger.info(f"开始过滤密集点 (网格大小: {self.config.filter_grid_size}, 距离阈值: {
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self.config.filter_dense_distance_threshold})")
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self.gps_points = filter.filter_dense_points(
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self.gps_points,
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grid_size=self.config.filter_grid_size,
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distance_threshold=self.config.filter_dense_distance_threshold
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)
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self.logger.info(f"密集点过滤后剩余 {len(self.gps_points)} 个GPS点")
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return self.gps_points
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def divide_grids(self) -> Dict[int, List[Dict]]:
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"""划分网格"""
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if not self.config.enable_grid_division:
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return {0: self.gps_points} # 不划分网格时，所有点放在一个网格中
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self.logger.info(f"开始划分网格 (重叠率: {self.config.grid_overlap})")
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grid_divider = GridDivider(overlap=self.config.grid_overlap)
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grids = grid_divider.divide_grids(self.gps_points)
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grid_points = grid_divider.assign_to_grids(self.gps_points, grids)
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self.logger.info(f"成功划分为 {len(grid_points)} 个网格")
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return grid_points
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def copy_images(self, grid_points: Dict[int, List[Dict]]):
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"""复制图像到目标文件夹"""
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self.logger.info("开始复制图像文件")
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os.makedirs(self.config.output_dir, exist_ok=True)
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for grid_idx, points in grid_points.items():
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if self.config.enable_grid_division:
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output_dir = os.path.join(self.config.output_dir, f'grid_{
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grid_idx + 1}', 'images')
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else:
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output_dir = os.path.join(self.config.output_dir, 'images')
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os.makedirs(output_dir, exist_ok=True)
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for point in tqdm(points, desc=f"复制网格 {grid_idx + 1} 的图像"):
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src = os.path.join(self.config.image_dir, point['file'])
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dst = os.path.join(output_dir, point['file'])
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shutil.copy(src, dst)
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self.logger.info(f"网格 {grid_idx + 1} 包含 {len(points)} 张图像")
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def visualize_results(self):
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"""可视化处理结果"""
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if not self.config.enable_visualization:
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return
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self.logger.info("开始生成可视化结果")
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extractor = GPSExtractor(self.config.image_dir)
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original_points = extractor.extract_all_gps()
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with open(os.path.join(self.config.output_dir, 'del_imgs.txt'), "r", encoding="utf-8") as file:
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filtered_file = [line.strip() for line in file]
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# 绘制散点图
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plt.figure(figsize=(10, 8))
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plt.scatter([p['lon'] for p in original_points],
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[p['lat'] for p in original_points],
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color='blue', label="Original Points", alpha=0.6)
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plt.scatter([p['lon'] for p in original_points if p['file'] in filtered_file],
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[p['lat']
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for p in original_points if p['file'] in filtered_file],
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color="red", label="Filtered Points", alpha=0.6)
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plt.title("GPS Coordinates of Images", fontsize=14)
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plt.xlabel("Longitude", fontsize=12)
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plt.ylabel("Latitude", fontsize=12)
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plt.grid(True)
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plt.legend()
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plt.savefig(os.path.join(self.config.output_dir, 'filter_GPS.png'))
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plt.close()
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self.logger.info("预处理结果图已保存")
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def process(self):
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"""执行完整的预处理流程"""
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try:
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self.extract_gps()
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self.filter_points()
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grid_points = self.divide_grids()
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self.copy_images(grid_points)
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self.visualize_results()
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self.logger.info("预处理任务完成")
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except Exception as e:
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self.logger.error(f"处理过程中发生错误: {str(e)}", exc_info=True)
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raise
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if __name__ == '__main__':
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# 创建配置
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config = PreprocessConfig(
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image_dir=r'C:\datasets\1815\output\grid_5\images',
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output_dir=r'C:\datasets\1815\output\grid_5',
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filter_grid_size=0.001,
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filter_dense_distance_threshold=10,
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filter_distance_threshold=0.001,
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filter_min_neighbors=6,
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grid_overlap=0.05,
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enable_filter=False,
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enable_grid_division=True,
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enable_visualization=False
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)
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# 创建处理器并执行
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processor = ImagePreprocessor(config)
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processor.process()
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