The magic kernel

Re:The magic kernel by statusreport on Saturday October 17, 2015 @05:24PM (#10406188)

Sorry guys, but no magic is involved here: http://cbloomrants.blogspot.com/2011/03/03-24-11-image-filte...

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Re:The magic kernel by gus_massa on Saturday October 17, 2015 @06:05PM (#10406334)

I mostly agree. But

> Costella shows that Lanczos and Bicubic create nasty grid artifacts. This is not true, he simply has a bug in his upsamplers.

The good and bad part of discussions about image processing is that it's easy to compare the results. This blog post would be better with the images using the correct implementation of the filters.

(One problem is that some times just getting the images, configuring the programs and tiding the results is more time consuming than expected. So "just add the images" may be a one week project.)

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Re:The magic kernel by zokier on Saturday October 17, 2015 @07:27PM (#10406598)

For reference I get the following result with my GIMPs "Cubic" scaler:

http://i.imgur.com/3LLNzv5.png

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Re:The magic kernel by wazoox on Sunday October 18, 2015 @09:16AM (#10408139)

Notice the long-known bug, Gimp doesn't manage gamma properly, the scaled picture looks slightly darker.

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