How much can bicubic safely downsize images?

[Stefan O.]

In reference to https://issues.skia.org/issues/332580479, I received the following information:

> "Skia's bicubic interpolation utilizes a fixed-size window. Consequently, for downsampling beyond a specific threshold, there will be a degradation in quality."

Could someone please provide clarification on the exact dimensions of this window and specify the threshold size beyond which downsampling can be done safely without compromising quality?

The downscaled version of my sample image using bicubic interpolation exhibits a quality comparable to that of the NEAREST method.

[Brian Osman]

The bicubic filters all use a 4x4 (pixel) kernel.

--
You received this message because you are subscribed to the Google Groups "skia-discuss" group.
To unsubscribe from this group and stop receiving emails from it, send an email to skia-discuss...@googlegroups.com.
To view this discussion on the web visit https://groups.google.com/d/msgid/skia-discuss/68dc9db4-ec6e-4bdb-99f8-738371281664n%40googlegroups.com.