Python Pillow – Enhance Edges of Image

Pillow – Enhance edges of image

We can enhance the edges of an image in Pillow, by calling PIL.Image.filter() function on the given image and passing the predefined filter PIL.ImageFilter.EDGE_ENHANCE.

Steps to enhance edges of an image

Follow these steps to enhance the edges of a given image.

1. Import Image, and ImageFilter modules from Pillow library.
2. Read input image using Image.open() function.
3. Call filter() function on the read Image object and pass ImageFilter.EDGE_ENHANCE as argument to the function, or if you want more of this, then you may pass ImageFilter.EDGE_ENHANCE_MORE. The function returns edge enhanced image as PIL.Image.Image object.
4. Save the resulting image to required location, or you may process the image further.

Examples

1. Enhance edges using ImageFilter.EDGE_ENHANCE

In the following example, we read an image test_image.jpg into an Image object. Then, we enhance the edges of this image using Image.filter() function and ImageFilter.EDGE_ENHANCE filter.

We save the resulting image to a file enhanced_image.jpg.

from PIL import Image, ImageFilter

# Open the image
image = Image.open("test_image.jpg")

# Apply edge enhancement filter on the image
enhanced_image = image.filter(ImageFilter.EDGE_ENHANCE)

# Save the enhanced image
enhanced_image.save("enhanced_image.jpg")

Original Image [test_image.jpg]

Output Image [enhanced_image.jpg]

2. Enhance edges using ImageFilter.EDGE_ENHANCE_MORE

In the following example, we read an image test_image.jpg into an Image object. Then, we enhance the edges of this image using Image.filter() function and ImageFilter.EDGE_ENHANCE_MORE filter.

We save the resulting image to a file enhanced_image.jpg.

from PIL import Image, ImageFilter

# Open the image
image = Image.open("test_image.jpg")

# Apply edge enhancement filter on the image
enhanced_image = image.filter(ImageFilter.EDGE_ENHANCE_MORE)

# Save the enhanced image
enhanced_image.save("enhanced_image.jpg")

Original Image [test_image.jpg]

Output Image [enhanced_image.jpg]

Summary

In this Python Pillow Tutorial, we learned how to enhance the edges of given image using PIL.Image.filter() function, with the help of examples.