Re: Congrid problem

[Craig Markwardt <craigmnet(at)cow.physics.wisc.edu>]

Jonathan Joseph <jj21@cornell.edu> writes:

> I'm running IDL 5.3 on HP-UX and seeing the following
> problem with congrid.  I have a byte image that has large areas
> of a particular solid color (a background color).
> I rescale the image to be larger using congrid with the
> /interp flag set.  My nice solid areas of the background color,
> which I would still expect to see unspoiled, now have artifacts
> in them with value background_color - 1.  This looks like a
> bug.  What's going on?
> 
> Here's an example that show's the problem:
... deleted ...

Your example doesn't have the artifact on Linux on IDL 5.2 and IDL
5.3.  It sounds like a bug under HP-UX.

Craig


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Craig B. Markwardt, Ph.D.         EMAIL:    craigmnet@cow.physics.wisc.edu
Astrophysics, IDL, Finance, Derivatives | Remove "net" for better response
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