copy_min_max_segments.py

import os
import shutil
import re
from collections import defaultdict

# Source and destination directories
source_dir = "edited_segmented_images"
dest_dir = "min_max_segments"

# Create destination directory if it doesn't exist
os.makedirs(dest_dir, exist_ok=True)
print(f"Created destination directory: {dest_dir}")

# Dictionary to store page -> list of (segment_number, filename) tuples
pages = defaultdict(list)

# Pattern to match the filename format
pattern = re.compile(r"page_(\d+)_segment_(\d+)\.png")

# Scan the source directory
print("Scanning source directory...")
for filename in os.listdir(source_dir):
    match = pattern.match(filename)
    if match:
        page_id = int(match.group(1))
        segment_num = int(match.group(2))
        pages[page_id].append((segment_num, filename))

# Copy min and max segment files for each page
copy_count = 0
print("\nCopying files...")
for page_id in sorted(pages.keys()):
    segments = pages[page_id]
    if segments:
        # Sort by segment number
        segments.sort(key=lambda x: x[0])
        
        # Get min and max segment files
        min_segment = segments[0]
        max_segment = segments[-1]
        
        # Copy min segment file
        src_file = os.path.join(source_dir, min_segment[1])
        dst_file = os.path.join(dest_dir, min_segment[1])
        shutil.copy2(src_file, dst_file)
        print(f"Copied: {min_segment[1]} (page {page_id:04d}, min segment {min_segment[0]})")
        copy_count += 1
        
        # Copy max segment file (only if different from min)
        if min_segment[0] != max_segment[0]:
            src_file = os.path.join(source_dir, max_segment[1])
            dst_file = os.path.join(dest_dir, max_segment[1])
            shutil.copy2(src_file, dst_file)
            print(f"Copied: {max_segment[1]} (page {page_id:04d}, max segment {max_segment[0]})")
            copy_count += 1

print(f"\n✅ Completed! Copied {copy_count} files to '{dest_dir}' directory.")
print(f"Total pages processed: {len(pages)}")