[gnuastro-devel] [task #14365] Allow the user to input fractions as a scaling value to ImageWarp

[Lee Kelvin]

URL:
  <http://savannah.gnu.org/task/?14365>

                 Summary: Allow the user to input fractions as a scaling value
to ImageWarp
                 Project: GNU Astronomy Utilities
            Submitted by: leeskelvin
            Submitted on: Wed 08 Feb 2017 08:32:28 PM UTC
         Should Start On: Wed 08 Feb 2017 12:00:00 AM UTC
   Should be Finished on: Wed 08 Feb 2017 12:00:00 AM UTC
                Category: ImageWarp
                Priority: 5 - Normal
              Item Group: Enhancement
                  Status: None
                 Privacy: Public
        Percent Complete: 0%
             Assigned to: None
             Open/Closed: Open
         Discussion Lock: Any
                  Effort: 0.00

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Details:

If I want to scale a 3x3 pixel image up to 8x8 pixels, the correct scaling
value is 2.6 recurring (8/3). This value will always be an approximation; it
is impossible for me to express the correct scaling accurately.

I propose to allow the user to specify scaling values using fractional
notation. For example, to scale an image from 3x3 pixels to 8x8 I could use
the command:


astimgwarp --scale=8/3 input.fits


Best, 
Lee Kelvin





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