Create a watermarking tool

Here’s a simple Python script to create a watermarking tool that adds a semi-transparent text watermark to images. It uses the Pillow library for image processing:

python
CopyEdit
from PIL import Image, ImageDraw, ImageFont

def add_watermark(input_image_path, output_image_path, watermark_text, position=(0, 0), opacity=128, font_size=36):
    # Open the original image
    original = Image.open(input_image_path).convert("RGBA")
    
    # Make a blank image for the watermark with transparent background
    watermark = Image.new("RGBA", original.size, (255,255,255,0))
    
    # Get a drawing context
    draw = ImageDraw.Draw(watermark)
    
    # Load a font
    try:
        font = ImageFont.truetype("arial.ttf", font_size)
    except IOError:
        font = ImageFont.load_default()
    
    # Calculate the width and height of the text to be added
    text_width, text_height = draw.textsize(watermark_text, font)
    
    # Set position if set to 'center'
    if position == 'center':
        position = ((original.width - text_width) // 2, (original.height - text_height) // 2)
    
    # Draw the text on the watermark image
    draw.text(position, watermark_text, fill=(255, 255, 255, opacity), font=font)
    
    # Combine original image with watermark
    watermarked = Image.alpha_composite(original, watermark)
    
    # Convert back to RGB and save the result
    watermarked.convert("RGB").save(output_image_path, "JPEG")

# Example usage
add_watermark("input.jpg", "output.jpg", "Sample Watermark", position='center', opacity=100, font_size=48)

This script will add a semi-transparent white watermark text centered on your image. You can customize text, position, opacity, and font size. Just replace "input.jpg" and "output.jpg" with your file paths.

Would you like a version for batch watermarking multiple images or with image watermark support?