Re: Back to basics: Interpolation teaser

On Sep 22, 1:10 pm, Martin Leese <ple...@xxxxxxxxxxxxxxxxxxxxxxxxxx>
wrote:
Pixel.to.life wrote:
Hi, All,

Here is a question on interpolation and resampling.
...
My questions are:

- what can be inferred about the nature of the interpolation method
employed given only the above information?
- on the resample circle image, the circle profile displays some 'saw
tooth' patterns. Is that an artifact/limitation of interpolation
scheme? Or it is expected?
- if you think there are artifacts in the resampled images, what could
be a possible solution or a better way to resample?

The interpolated images contain only black
and white, no gray. Perhaps the problem is
that your output images are binary when they
should be graytone.

--
Regards,
Martin Leese
E-mail: ple...@xxxxxxxxxxxxxxxxxxxxxxxxxx
Web:http://members.tripod.com/martin_leese/


I found one bug (rather unexpected behavior) already. Right after
interpolation, a transfer function was being implicitly applied to the
result image, binarizing it so all the greylevels combine into one
value. This explains the lack of grey tones. Still there are other
bugs, as one can see here:

http://medicalimagingscience.googlegroups.com/web/ResampledCircle_2.jpg



.

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