Starlight Xpress SXVF-H9 - Manual (Page 18)

Handbook for the SXVF-H9 Issue 1 May 2007
18
A raw image
Try applying an ‘Unsharp Mask’ filter with a radius of 5 and a power of 5. This will
greatly increase the visibility of any detail on the planet, but the optimum radius and
power will have to be determined by experiment.
After the application of an ‘Unsharp mask’
In general terms, the larger the image and the worse the seeing, then the wider the
radius for best results. My Jupiter shots are usually about one third the height of the
CCD frame and I find that the ‘radius 5, power 5’ values are good for most average
seeing conditions. If you have exceptionally good conditions, then a reduction to R=3,
P=3 will probably give a more natural look to the image, as too large a radius and
power tends to outline edges with dark or bright borders.