Table 4. Comparison between HSI and FSI.
| HSI | FSI |
||
|---|---|---|---|
| Original FSI | Binary FSI | ||
| Perfect reconstruction | Yes | Yes | No |
| Measurements for each coefficient (direct sampling) | 1 | 1 | 1 |
| Measurements for each coefficient (differential sampling) | 2 | 1.5 (3-step); 2 (4-step) | 1.5 (3-step); 2 (4-step) |
| Grayscale levels | Binary | Multiple | Binary |
| Robust to dark / read-out noise | Yes | Yes | Yes |
| Robust to quantization errors | Yes | No | Yes |
| Reconstruction for arbitrary-size image | No | Yes | Yes |
| Patterns generation methods | Spatial light modulator | Spatial light modulator / Interference of planar waves | Spatial light modulator |