Focus Peaking
Categories:
Focus Peaking highlights sharp edge detail in the current image. It is a visual aid for checking whether the important part of the photo is in focus.
How to Use It
- Open an image in zoom view.
- Turn on the focus mask or focus peaking overlay in the image controls.
- Inspect the highlighted areas.
- Adjust Focus settings if the overlay is too weak or too busy.
For best results, use extracted JPG previews or RAW-based zoom previews instead of small thumbnails.
Settings
Focus controls are in RawCull -> Settings -> Focus.
| Control | Effect |
|---|---|
| Threshold | Higher values show only the strongest sharp edges |
| Pre-blur | Higher values reduce noise and background texture |
| Amplify | Makes the overlay more visible |
| Erosion | Removes small isolated highlight specks |
| Dilation | Expands nearby highlight regions |
Tips
- Lower the threshold if too little is highlighted.
- Raise the threshold if too much of the image is highlighted.
- Increase pre-blur for noisy high-ISO files.
- Use the overlay as a guide, not as a final decision.
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