pyBegin / projects / gradient-image
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Gradient Image

An OpenCV demo that loads an image and displays edge-detection results — Laplacian, combined Sobel gradient, and Canny — in separate windows for a…

36 lines🖥 Desktop only
View source folder on GitHub →contributed by@smw-1211

Gradient Image

An OpenCV demo that loads an image and displays edge-detection results — Laplacian, combined Sobel gradient, and Canny — in separate windows for a pencil-shaded style representation.

Example

  1. Place an image at Photos/image.jpg and run python gradient.py.
  2. Three windows open side by side:
    • Laplacian Image — highlights rapid intensity changes as bright edges on a black background.
    • Sobel Final — shows combined horizontal and vertical gradient magnitude.
    • Canny — clean single-pixel edge outlines using Canny detection (thresholds 150–175).
  3. Press any key to close all windows.

How to run on localhost

pip install opencv-python numpy
python gradient.py

Dependencies