🧭 Simulator EP03_08: Sobel Gradient (Gx and Gy)
|∇f| = √(Gx² + Gy²)
Analyze the horizontal (Gx) and vertical (Gy) decomposition of the Sobel operator and hover over the magnitude pixels to inspect the 3×3 neighborhood.
Sobel Kernels:
−1
0
+1
−2
0
+2
−1
0
+1
−1
−2
−1
0
0
0
+1
+2
+1
Original Image f
5×5 pixel matrix
Magnitude |∇f|
√(Gx² + Gy²)
Gx — Horizontal Gradient
Blue = Negative · White = Zero · Bright Blue = Positive
Gy — Vertical Gradient
Amber = Negative · White = Zero · Bright Amber = Positive
Legend:
Inspected 3×3 Neighborhood
Central Pixel
Edge (Forced to 0)
Hover over an inner magnitude pixel to see the Gx and Gy decomposition.
Description: Figure 3.33: EP03_08 Simulator: Sobel Gradient (Gx and Gy)