🚀 go-pugleaf

cartley@slate.mines.colorado.edu (Craig Artley) writes:

>I'm trying to enable Level 2 image interpolation by setting Interpolate
>to true in the image dictionary.  As I understand the description of
>Interpolate on p. 222 of the red book, this should smoothly interpolate
>between sample values when the source resolution is lower than the
>device resolution.  Unfortunately, when i run the code below I simply
>get the same checkerboard result as when interpolation is disabled.
>	
>Am I doing something wrong?
>
> <<Sample PS code deleted>>

Depending on the sophistication or otherwise of your favorite
RIP's interpolating algorithm, the 3x3 pixel example you quote
may simply not be big enough to turn interpolation on.  My clone
uses bilinear interpolation, so your file works fine.  A weird
bicubic algorithm might decide that an image that (in its terms)
was composed entirely of `egdes' was not worth bothering about.

Or it might be a bug:-)

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