# Sharpness Interpretation

## Sharpness Scale

| Sharpness Units | Description                                                                                                    |
|-----------------|----------------------------------------------------------------------------------------------------------------|
| 0-20 SU         | Very low sharpness, indicating a highly blurred reflection with indistinct edges.                              |
| 21-40 SU        | Low sharpness, where the reflected image is somewhat blurry but edges are more discernible.                    |
| 41-60 SU        | Moderate sharpness, with clearer edges and a more distinct reflected image.                                    |
| 61-80 SU        | High sharpness, showing a very clear and distinct reflected image with sharp edges.                            |
| 81-100 SU       | Very high sharpness, indicating an exceptionally clear reflection with extremely sharp and well-defined edges. |


## Relationship Between DOI and Sharpness
While both DOI and sharpness are measures of image clarity in reflections, they focus on slightly different aspects:
- DOI evaluates the overall clarity and distinctness of the entire reflected image.
- Sharpness specifically assesses the clarity and definition of the edges within the reflected image.
