Re: Optical 06 April 2009-more

From: Greg Roberts (grr@telkomsa.net)
Date: Thu Apr 09 2009 - 07:32:56 UTC

  • Next message: Peter Wakelin: "SATOBS 2009 April 08"

    Morning Derek
    
    There is no problem in converting just about any of the major formats into FITS 
    format but in the case of the video images I have, including some from you, the 
    largest image pixel value is 255 even if I save the video image as a 16 or 32 
    bit image
    FITS image.
    
    The reduction program refuses to display the image and apparently expects an 
    image with a  largest pixel value of  65535.
    
    So this is the first complication.... I will investigate further but unless the 
    video image can be saved with 65535 "grey" levels instead of the normal "255" 
    there is a problem. Maybe somewhere in the program configuration file one may be 
    able to change this but first examination does not show any obvious place to 
    change.
    
    I will dig up Davids article and see if that sheds more light on the subject.
    
    Cheers
    Greg
    
    ----- Original Message ----- 
    From: "Derek C Breit" <breit_ideas@hotmail.com>
    To: "'Greg Roberts'" <grr@telkomsa.net>; <SeeSat-D@satobs.org>
    Cc: "'Ted Molczan'" <tedmolczan@rogers.com>; "'Mike Mccants'" <mmccants@io.com>; 
    "'David Brierley'" <davidbrierley@waitrose.com>; "'Russell Eberst'" 
    <eberst@blueyonder.co.uk>; "'Peter Wakelin'" <peter@ascotrig.demon.co.uk>; 
    "'Scott-home Campbell'" <campbel7@hughes.net>; "'Pierre Neirinck'" 
    <pierre-neirinck@wanadoo.fr>; "'Bjoern Gimle'" <bg_26934@glocalnet.net>; 
    "'Willie Koorts'" <wpk@saao.ac.za>
    Sent: Wednesday, April 08, 2009 6:39 PM
    Subject: RE: Optical 06 April 2009-more
    
    
    > Unfortunately the program only works with FITS images so the use of
    >    a video camera possibly producing FITS images has not yet been
    >    investigated by me.
    >
    >
    >
    >
    > Video can be turned into fits images quite easily... See the Video
    > Astrometry Guide from Dave Herald..
    >
    > Derek
    >
    > 
    
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