On Wed, Jul 30, 2008 at 10:23 PM, David Gowers <[EMAIL PROTECTED]> wrote:
> The webpages are nearly finished, I'm checking them now.
> Some observations on the results of scaling:
> * The old code mistreated the left and top edges, resulting in a
> duplication of up to 1 pixel on the left and top edge (and
> corresponding omittal of a row of pixels on the right and bottom
> edge). This looked slightly odd for upscaling, and very odd for
> downscaling. The new code gives results that are more predictable and
> more correct.
> * There is still a bug present in the new lanczos code which you can
> easily see on the horse test image- the top row and left column of
> pixels acquire junk pixels (there was only pure white in the source
> image near there) . An example of the bug is attached. I hope this
> helps isolate the cause of the bug.
> (this bug is not present in the old code)
OOPS! In fact, this bug is a reduced version of the same 'top+left
edges stretched' bug in the old code.
I've finished checking, and am just sending off the results and
webpage to Sven now.
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