Table 1 Directionally steerable filter coefficients
From: Fast digital zooming system using directionally adaptive image interpolation and restoration
Angle θ | 5 × 5 steerable filter coefficients (σ = 1.0) | |||||
|---|---|---|---|---|---|---|
| Â | Horizontal | Â | Â | Â | Â |
Vertical | -0.0084 | -0.0377 | -0.0621 | -0.0377 | -0.0084 | |
-0.0188 | -0.0844 | -0.1392 | -0.0844 | -0.0188 | ||
0.0000 | 0.0000 | 0.0000 | 0.0000 | 0.0000 | ||
0.0188 | 0.0844 | 0.1392 | 0.0844 | 0.0188 | ||
0.0084 | 0.0377 | 0.0621 | 0.0377 | 0.0084 | ||
| Â | Horizontal | Â | Â | Â | Â |
Vertical | -0.0114 | -0.0384 | -0.0420 | -0.0127 | 0.0000 | |
-0.0384 | -0.1142 | -0.0942 | 0.0000 | 0.0127 | ||
-0.0420 | -0.0942 | 0.0000 | 0.0942 | 0.0420 | ||
-0.0127 | 0.0000 | 0.0942 | 0.1142 | 0.0382 | ||
0.0000 | 0.0127 | 0.0420 | 0.0382 | 0.0144 | ||
| Â | Horizontal | Â | Â | Â | Â |
Vertical | 0.0084 | 0.0188 | 0.0000 | -0.0188 | -0.0084 | |
0.0377 | 0.0844 | 0.0000 | -0.0844 | -0.0377 | ||
0.0621 | 0.1392 | 0.0000 | -0.1392 | -0.0621 | ||
0.0377 | 0.0844 | 0.0000 | -0.0844 | -0.0377 | ||
0.0084 | 0.0188 | 0.0000 | -0.0188 | -0.0084 | ||
| Â | Horizontal | Â | Â | Â | Â |
Vertical | 0.0000 | -0.0127 | -0.0420 | -0.0382 | -0.0144 | |
0.0127 | 0.0000 | -0.0942 | -0.1142 | -0.0382 | ||
0.0420 | 0.0942 | 0.0000 | -0.0942 | -0.0420 | ||
0.0382 | 0.1142 | 0.0942 | 0.0000 | -0.0127 | ||
| Â | Â | 0.0114 | 0.0382 | 0.0420 | 0.0127 | 0.0000 |