Create a Python script for batch watermarking

Here’s a simple Python script to apply a watermark to multiple images in a batch. This uses the Pillow library for image manipulation and os to handle file system operations. The watermark will be placed in the bottom right corner of each image.

Prerequisites:

You need to install the Pillow library if you haven’t already:

bash
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pip install pillow

Python script:

python
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from PIL import Image, ImageDraw, ImageFont
import os

# Function to apply watermark to an image
def apply_watermark(image_path, watermark_text, output_path):
    # Open the original image
    original_image = Image.open(image_path)
    width, height = original_image.size

    # Make the image editable
    watermark_image = original_image.copy()
    draw = ImageDraw.Draw(watermark_image)

    # Choose font and size
    font = ImageFont.load_default()
    text_width, text_height = draw.textsize(watermark_text, font)

    # Position of the watermark (bottom right corner)
    position = (width - text_width - 10, height - text_height - 10)

    # Apply the watermark text
    draw.text(position, watermark_text, font=font, fill=(255, 255, 255, 128))  # White color with transparency

    # Save the watermarked image
    watermark_image.save(output_path)

# Function to batch watermark images in a directory
def batch_watermark(input_folder, output_folder, watermark_text):
    # Check if output folder exists, if not create it
    if not os.path.exists(output_folder):
        os.makedirs(output_folder)

    # Loop through all files in the input folder
    for filename in os.listdir(input_folder):
        file_path = os.path.join(input_folder, filename)
        if os.path.isfile(file_path) and filename.lower().endswith(('jpg', 'jpeg', 'png')):
            output_path = os.path.join(output_folder, f"watermarked_{filename}")
            apply_watermark(file_path, watermark_text, output_path)
            print(f"Watermarked {filename} and saved to {output_path}")

# Example usage
input_folder = "path/to/your/images"
output_folder = "path/to/save/watermarked/images"
watermark_text = "Your Watermark"

batch_watermark(input_folder, output_folder, watermark_text)

How it works:

1. apply_watermark: This function applies a watermark text to a single image. It opens the image, creates a copy, and draws the watermark text in the bottom right corner with a slight transparency.

2. batch_watermark: This function loops through all the images in the input directory, applies the watermark to each image, and saves the watermarked image in the output directory.

3. The script handles jpg, jpeg, and png images by checking their extensions.

Notes:

• The watermark text is drawn with a white color and some transparency (alpha value = 128). You can modify the fill parameter for different colors or transparency.

• You can change the font size or style by using ImageFont.truetype() and providing a custom font file path.

Example Usage:

1. Place your images in a folder, for example, images/.

2. Define the input and output folder paths and the watermark text.

3. Run the script to apply watermarks to all images in the input folder and save the results in the output folder.