Starlight Xpress SXVF-H9 - Manual (Page 15)

Handbook for the SXVF-H9 Issue 1 May 2007
15
3) The resulting image will probably look faint and dull, with a pale background due
to light pollution. It is now time to process the ‘luminance’ (brightness and contrast)
of the image to get the best visual appearance. First, use the ‘Normal’ contrast stretch
to darken the background by setting the ‘Black’ slider just below the main peak of the
histogram. Alternatively, you can use the ‘Remove Background’ option to let the
software decide on the best setting. This will greatly reduce the background
brightness and the image will begin to look rather more attractive, if dark. You can
now try brightening the highlights with another ‘Normal’ stretch, in which you bring
down the ‘White’ slider to just above the main image peak. The best setting for this is
rather more difficult to guess and you may need several attempts before the result is
ideal. Just use the ‘Undo last filter’ function, if necessary, to correct a mistake.