Image Sampling
Compare rectangular and quincunx sampling on a concentric ring pattern.
Rectangular 1:4
Quincunx 1:8
Sinusoidal rings
What to look for
- Both samplers start from the same 512×512 concentric pattern.
- Rectangular sampling averages each 2×2 block, leading to blocky steps.
- Quincunx sampling staggers its grid, keeping diagonals smoother at a lower rate.
Original pattern
Sinusoidal rings generated procedurally to match the lecture graphic.
Rectangular sampling
Averaged 2×2 blocks are replicated back to full resolution (sampling ratio 1:4).
Sampling points sit at the center of each 2×2 cell.
Quincunx sampling
Pairs of diagonal neighbours combine to fill the grid (sampling ratio 1:8).
Diamond-shaped lattice captures diagonals more gracefully.