Use the highest quality scaling available in opencv instead of imagemagick: def resize_images(input_folder: Path, output_folder: Path, image_processor: 'ImageProcessor'):
    """Resize images in the input folder and save them to the output folder."""
    try:
        check_executable(Config.IMAGEMAGICK, "ImageMagick")
    except FileNotFoundError as e:
        log_error(str(e))
        return

    tasks = [input_path for input_path in input_folder.rglob('*') 
             if input_path.is_file() and input_path.suffix.lower() in Config.IMAGE_EXTENSIONS]

    if not tasks:
        log_error(f"No image files found in '{input_folder}'")
        return

    with create_temp_folder() as temp_folder:
        run_with_thread_pool(tasks, process_file, time.time(), len(tasks), image_processor, temp_folder, True)

def resize_image(input_path: Path, output_path: Path) -> Path:
    """Resize an image using ImageMagick."""
    output_path = output_path.with_suffix('.png')
    
    identify_command = [
        str(Config.IMAGEMAGICK),
        str(input_path),
        '-format', '%wx%h',
        'info:'
    ]
    try:
        result = subprocess.run(
            identify_command, 
            stdout=subprocess.PIPE, 
            stderr=subprocess.PIPE, 
            text=True, 
            check=True
        )
        current_width, current_height = map(int, result.stdout.strip().split('x'))
    except subprocess.CalledProcessError as e:
        log_error(f"ImageMagick identify failed for {input_path}: {e.stderr.strip()}")
        return output_path

    resize_mode = app.RESIZE_MODE.get()
    maintain_aspect = app.maintain_aspect_ratio.get()
    
    if resize_mode == "Fit":
        target_width = int(app.RESIZE_WIDTH.get() or 0)
        target_height = int(app.RESIZE_HEIGHT.get() or 0)
        
        if maintain_aspect:
            if target_width == 0 and target_height > 0:
                target_width = int(target_height * current_width / current_height)
            elif target_height == 0 and target_width > 0:
                target_height = int(target_width * current_height / current_width)
        
        resize_arg = f'{target_width}x{target_height}!'
    else:  # Shortest Side
        target_size = int(app.RESIZE_SIDE.get())
        resize_arg = f'{target_size}x{target_size}^'

    is_upscaling = (
        (resize_mode == "Fit" and (target_width > current_width or target_height > current_height)) or
        (resize_mode == "Shortest Side" and target_size > min(current_width, current_height))
    )

    command = [
        str(Config.IMAGEMAGICK),
        str(input_path),
    ]
    
    if is_upscaling:
        command += [
            '-filter', 'LanczosSharp',
            '-distort', 'Resize', resize_arg,
        ]
    else:
        command += [
            '-colorspace', 'RGB',
            '-filter', 'Lanczos2Sharp',
            '-resize', resize_arg,
            '-colorspace', 'sRGB',
        ]
    
    command += [
        '-define', 'png:compression-level=5',
        str(output_path)
    ]
    
    try:
        result = subprocess.run(
            command,
            stdout=subprocess.PIPE,
            stderr=subprocess.PIPE,
            text=True,
            check=True
        )
        if result.stderr:
            log_error(f"ImageMagick: {result.stderr.strip()}")
    except subprocess.CalledProcessError as e:
        log_error(f"ImageMagick resize failed for {input_path}: {e.stderr.strip()}")
    
    return output_path