Legacy ImageMagick Discussions Archive

It's "Welch", not "Welsh".
http://www.cg.tuwien.ac.at/~theussl/DA/node34.html
http://www.cis.rit.edu/resources/softwa ... ndows.html
http://paulbourke.net/miscellaneous/windows/
http://mathworld.wolfram.com/WelchApodi ... ction.html
And, based on the tests of my student Adam Turcotte, it is one of the very best window functions, based on its "reconstructor" power for subcritical ("very slightly blurry") images. (Cosine is really good, too; so are Sinc (Lanczos) and Hamming (this last one, only when using many lobes).) (Warning: reconstruction tests do not measure visual quality, only something best described as "accuracy".)

In the same vein, you guys are aware that the real name of the "Hanning" window function is "Hann", yes?
"Hanning" is a common misspelling, probably arising from the fact that the Hann window is quite similar to the Hamming window.

I added the correct spellings as 'alternative' names in IMv6 (unable to do a complete fix for library backward compatibilty)

And a complete correction with 'alternate miss-spellings' in IMv7 (with defines for programming compatibility)

I think I have everything -- it certainly compiled fine.

As such
convert -list filter
or for IMv7...
magick -list filter
now lists
Hann and Welch
rather than
Hanning and Welsh
But the later miss-spells will continue to work, even though it is not listed in the option list.

Thank you Anthony.

The graphs on resize examples have also now been updated. Give the official site a bit of time though.