Have you tried all the choices of specifying which filter you'd like resize to
use?
buf = oiio.ImageBufAlgo.resize(buf, roi=roi, filtername="blah")
That's a pretty extreme resizing of low-res data, almost 18x, of data with
high-contrast edges. I'm wondering what you hope for it to look like under even
the best of circumstances?
PS. `oiiotool --help` will, somewhere near the bottom, tell you the name of all
the filters supported.
> On Jul 29, 2021, at 5:25 PM, Daniel Flood <daniel.flood...@gmail.com> wrote:
>
> Hi folks,
>
> I'm resizing an unusually small image (some convnet filter activations) from
> 72x40 to 1280x720. When I do, I get an excessive dilation or softening,
> which I suspect is from the default filter being applied.
>
> What options are there in terms of filter names? From digging around the api
> docs I haven't been able to find them.
>
> left image: the 72x40 pixel image
> right image: rescaled to 720p in oiio
>
> <image.png>
>
> buf = ImageBuf(ImageSpec(y, x, 1, oiio.FLOAT))
> buf.set_pixels(ROI(), npAarray)
> roi = ROI(0, 1280, 0, 720, 0, 1, 0, 3)
> buf = oiio.ImageBufAlgo.resize(buf, roi=roi)
>
> cheers
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> Oiio-dev@lists.openimageio.org
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--
Larry Gritz
l...@larrygritz.com
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