first: `pip install pillow numpy` then: `python emojipixels.py banana.png output.html 🍌`

emojipixels.py

import PIL.Image
import numpy as np

def image_to_ascii(image_path, output_path, ascii_char='#', width=100):
    """
    Convert a black and white image to ASCII art using a single character
    
    Args:
        image_path: Path to the input image
        output_path: Path to save the ASCII art as text file
        ascii_char: Character to use for the ASCII art
        width: Width of the ASCII art in characters
    """
    # Open image and convert to grayscale
    img = PIL.Image.open(image_path).convert('L')
    
    # Calculate new height to maintain aspect ratio
    aspect_ratio = img.height / img.width
    height = int(width * aspect_ratio * 0.43)  # Font-specific adjustment factor
    
    # Resize image
    img = img.resize((width, height))
    
    # Convert to numpy array for easier processing
    pixels = np.array(img)
    
    # Create ASCII art with fixed-width formatting
    ascii_art = []
    for row in pixels:
        line = ''
        for pixel in row:
            # Use ascii_char for dark pixels, space for light pixels
            if pixel < 128:  # Threshold at middle gray value
                line += ascii_char
            else:
                line += ' '
        # Ensure each line is exactly the same width by padding with spaces
        line = line.ljust(width)
        ascii_art.append(line)
    
    # Join lines and write to file
    ascii_text = '\n'.join(ascii_art)
    
    # Write to text file
    with open(output_path, 'w') as f:
        f.write(ascii_text)
    
    print(f"ASCII art saved to {output_path}")

# Example usage
if __name__ == "__main__":
    import sys
    if len(sys.argv) >= 2:
        input_image = sys.argv[1]
        output_file = sys.argv[2] if len(sys.argv) >= 3 else "ascii_art.txt"
        char = sys.argv[3] if len(sys.argv) >= 4 else "#"
        width = int(sys.argv[4]) if len(sys.argv) >= 5 else 100
        
        image_to_ascii(input_image, output_file, char, width)
    else:
        print("Usage: python script.py input_image [output_file] [ascii_char] [width]")