Wasn't it Darcy Johnston who wrote:
>This is a first draft of an image created using a macro I created, based
>heavily on Glenn McCarter's interlace code from his Winseat image in the
>previous IRTC round. The space image was created with Chris Colefax's galaxy
>include. The planet is my own.
>
>The image depicts an image received from a satellite that will be sent out
>in the future. It took years for the images to get to earth. But now it is
>obvious that it was worth the wait...
>
>Please let me know if you have any ideas on how to improve the image, be it
>from the space image point of view, or the TV interlacing effect. I realize
>that it is quite likely that by the time these images would get back to us,
>we would no longer be using TVs so the interlacing effect may well be
>eliminated but humor me on this. :)

From an astronomical point of view, the light source ought to be much
further from the planet. I'd suggest a distance of about 10000 planetary
diameters. With shorter distances, it's clear that the light rays
reaching the top and bottom of the planet are not parallel.


As regards the TV interlacing, it looks a bit harsh at the moment. I'd
suggest a bit of external post-processing (unless you consider such
things to be beneath you) to perform a slight vertical smoothing. It may
not be easy to find such a facility in an image post-processing program,
but if you have one that allows you to create your own image filters you
can set up one that looks like:-

    0  1  0
    0  4  0
    0  1  0

[In Paintshop Pro 6 use Image:User_Defined_Filters and set up one with
that pattern in the centre and zeroes all round. Set the Division Factor
to 6 and the Bias to zero.]

The strength of the smoothing can be decreased by increasing the number
in the centre, (in Paintshop Pro, adjust the Division Factor to be the
sum of all the values).

-- 
Mike Williams + #
Gentleman of Leisure

Post a reply to this message