You can use the Focus image tools to sharpen or blur an image.
Sharpen
The sharpen tool uses the “Un-Sharp mask” approach to sharpen up the image. Un-Sharp masking works by comparing the image to a blurred version of the image and adding back the differences to the original image.
Set the sliders to give the desired effect:
| %Amount | The percentage amount to sharpen by |
| Radius | The number of pixels that the image “mask” is blurred by |
| Threshold | Sets the threshold at which to skip sharpening for each pixel if the sharpening amount is less than the threshold value. |
Blur
Set the sliders to give the desired effect:
| %Amount | The percentage amount to blur by |
| Radius | The number of pixels that the image is blurred by |
See also