Canny Edge Detection

The Original Image

Steps

1. Convert to grayscale
2. Apply filter to minimize noise
3. Calculate gradient

Grayscale

Gaussian blur

Standard deviation: Kernal Size:

Gradiant

Horizontal Gradient

Vertical Gradient

Gradient Direction

Raw Gradient Direction

Rounded Gradient Direction

Key:

• yellow: horizontal
• green: positive diagonal
• blue: vertical
• red: negative diagonal

Gradient

Edge Thinning

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