Focus Mask
Categories:
The Focus Mask highlights areas with strong edge detail. Use it in the full-window viewer or comparison view to check where a photo appears sharp.
Press F or use the focus-mask control. For a more detailed check, switch from the small thumbnail to the embedded JPG (J) or developed RAW preview (R) when supported.
Sharpness scoring calibrates the mask threshold for the current catalog. You can fine-tune it in RawCull -> Settings -> Focus:
| Control | Effect |
|---|---|
| Threshold | Lower shows more detail; higher keeps only stronger edges |
| Pre-blur | Reduces fine texture and high-ISO noise |
| Amplify | Strengthens the visible mask |
| Erosion | Removes isolated highlighted pixels |
| Dilation | Expands and joins nearby highlighted areas |
The mask is a visual guide. Noise, texture, depth of field, and sharpening in the camera preview can affect the result.
Feedback
Was this page helpful?
Glad to hear it! Please tell us how we can improve.
Sorry to hear that. Please tell us how we can improve.