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https://github.com/K-Dense-AI/claude-scientific-skills.git
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Added all updated deep research and writing skills
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Vinayak Agarwal
235
scientific-skills/scientific-slides/scripts/slides_to_pdf.py
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235
scientific-skills/scientific-slides/scripts/slides_to_pdf.py
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#!/usr/bin/env python3
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"""
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Combine slide images into a single PDF presentation.
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This script takes multiple slide images (PNG, JPG) and combines them
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into a single PDF file, maintaining aspect ratio and quality.
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Usage:
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# Combine all PNG files in a directory
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python slides_to_pdf.py slides/*.png -o presentation.pdf
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# Combine specific files in order
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python slides_to_pdf.py slide_01.png slide_02.png slide_03.png -o presentation.pdf
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# From a directory (sorted by filename)
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python slides_to_pdf.py slides/ -o presentation.pdf
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"""
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import argparse
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import sys
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from pathlib import Path
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from typing import List
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try:
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from PIL import Image
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except ImportError:
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print("Error: Pillow library not found. Install with: pip install Pillow")
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sys.exit(1)
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def get_image_files(paths: List[str]) -> List[Path]:
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"""
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Get list of image files from paths (files or directories).
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Args:
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paths: List of file paths or directory paths
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Returns:
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Sorted list of image file paths
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"""
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image_extensions = {'.png', '.jpg', '.jpeg', '.gif', '.webp', '.bmp'}
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image_files = []
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for path_str in paths:
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path = Path(path_str)
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if path.is_file():
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if path.suffix.lower() in image_extensions:
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image_files.append(path)
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else:
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print(f"Warning: Skipping non-image file: {path}")
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elif path.is_dir():
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# Get all images in directory
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for ext in image_extensions:
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image_files.extend(path.glob(f"*{ext}"))
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image_files.extend(path.glob(f"*{ext.upper()}"))
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else:
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# Try glob pattern
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parent = path.parent
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pattern = path.name
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if parent.exists():
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matches = list(parent.glob(pattern))
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for match in matches:
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if match.suffix.lower() in image_extensions:
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image_files.append(match)
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# Remove duplicates and sort
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image_files = list(set(image_files))
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image_files.sort(key=lambda x: x.name)
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return image_files
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def combine_images_to_pdf(image_paths: List[Path], output_path: Path,
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dpi: int = 150, verbose: bool = False) -> bool:
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"""
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Combine multiple images into a single PDF.
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Args:
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image_paths: List of image file paths
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output_path: Output PDF path
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dpi: Resolution for the PDF (default: 150)
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verbose: Print progress information
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Returns:
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True if successful, False otherwise
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"""
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if not image_paths:
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print("Error: No image files found")
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return False
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if verbose:
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print(f"Combining {len(image_paths)} images into PDF...")
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# Load all images
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images = []
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for i, img_path in enumerate(image_paths):
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try:
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img = Image.open(img_path)
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# Convert to RGB if necessary (PDF doesn't support RGBA)
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if img.mode in ('RGBA', 'P'):
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# Create white background
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background = Image.new('RGB', img.size, (255, 255, 255))
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if img.mode == 'P':
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img = img.convert('RGBA')
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background.paste(img, mask=img.split()[-1] if img.mode == 'RGBA' else None)
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img = background
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elif img.mode != 'RGB':
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img = img.convert('RGB')
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images.append(img)
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if verbose:
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print(f" [{i+1}/{len(image_paths)}] Loaded: {img_path.name} ({img.size[0]}x{img.size[1]})")
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except Exception as e:
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print(f"Error loading {img_path}: {e}")
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return False
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if not images:
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print("Error: No images could be loaded")
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return False
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# Create output directory if needed
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output_path.parent.mkdir(parents=True, exist_ok=True)
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# Save as PDF
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try:
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# First image
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first_image = images[0]
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# Remaining images (if any)
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remaining_images = images[1:] if len(images) > 1 else []
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# Save to PDF
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first_image.save(
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output_path,
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"PDF",
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resolution=dpi,
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save_all=True,
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append_images=remaining_images
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)
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if verbose:
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print(f"\n✓ PDF created: {output_path}")
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print(f" Total slides: {len(images)}")
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file_size = output_path.stat().st_size
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if file_size > 1024 * 1024:
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print(f" File size: {file_size / (1024 * 1024):.1f} MB")
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else:
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print(f" File size: {file_size / 1024:.1f} KB")
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return True
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except Exception as e:
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print(f"Error creating PDF: {e}")
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return False
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finally:
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# Close all images
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for img in images:
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img.close()
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def main():
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"""Command-line interface."""
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parser = argparse.ArgumentParser(
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description="Combine slide images into a single PDF presentation",
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formatter_class=argparse.RawDescriptionHelpFormatter,
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epilog="""
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Examples:
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# Combine PNG files using glob pattern
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python slides_to_pdf.py slides/*.png -o presentation.pdf
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# Combine specific files in order
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python slides_to_pdf.py title.png intro.png methods.png results.png -o talk.pdf
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# Combine all images from a directory (sorted by filename)
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python slides_to_pdf.py slides/ -o presentation.pdf
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# With custom DPI and verbose output
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python slides_to_pdf.py slides/*.png -o presentation.pdf --dpi 200 -v
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Supported formats: PNG, JPG, JPEG, GIF, WEBP, BMP
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Tips:
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- Name your slide images with numbers for correct ordering:
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01_title.png, 02_intro.png, 03_methods.png, etc.
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- Use the generate_slide_image.py script to create slides first
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- Standard presentation aspect ratio is 16:9 (1920x1080 or 1280x720)
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"""
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)
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parser.add_argument("images", nargs="+",
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help="Image files, directories, or glob patterns")
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parser.add_argument("-o", "--output", required=True,
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help="Output PDF file path")
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parser.add_argument("--dpi", type=int, default=150,
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help="PDF resolution in DPI (default: 150)")
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parser.add_argument("-v", "--verbose", action="store_true",
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help="Verbose output")
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args = parser.parse_args()
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# Get image files
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image_files = get_image_files(args.images)
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if not image_files:
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print("Error: No image files found matching the specified paths")
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print("\nUsage examples:")
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print(" python slides_to_pdf.py slides/*.png -o presentation.pdf")
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print(" python slides_to_pdf.py slide1.png slide2.png -o presentation.pdf")
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sys.exit(1)
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print(f"Found {len(image_files)} image(s)")
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if args.verbose:
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for f in image_files:
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print(f" - {f}")
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# Combine into PDF
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output_path = Path(args.output)
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success = combine_images_to_pdf(
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image_files,
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output_path,
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dpi=args.dpi,
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verbose=args.verbose
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)
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if success:
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print(f"\n✓ PDF created: {output_path}")
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sys.exit(0)
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else:
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print(f"\n✗ Failed to create PDF")
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sys.exit(1)
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if __name__ == "__main__":
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main()
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