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Old 20th June 2009, 21:53   #65  |  Link
DeathTheSheep
<The VFW Sheep of Death>
 
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[img][/img]
[edit]Image removed, since it was replaced by imageshack with some italian-looking illegal screenshot thing. Suffice it to say, spline100 is back on track.[/edit]

It appears in-line with the other results from spline64 and up.

As to how I made these pics, yes, I at first did it exactly the way you described 5 times, but then decided to change my strategy: it's more interesting to instead test how accurately the interpolator can then scale up what it just scaled down, essentially a 2-way test. So I ended up doing:
Code:
spline100resize(320,240)
spline100resize(640,480)
32 times to produce these exact results.
Now it's even more interesting that spline36 produces such a 'sharp' image, sharper than the rest. Surely the coefficients for spline36 were determined via some other method or source?

Also, the natural spline produces oversharp images at low even tap numbers (2 and 4 most noticeably). When taps is increased too far (beyond the bounds of human reason, I'd say) as was the case with 64 taps, it produces strange artifacts on the bottom of the image.
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Last edited by DeathTheSheep; 1st October 2009 at 00:29.
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