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quincunx #92

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PattiMichelle opened this issue Apr 8, 2024 · 1 comment
Open

quincunx #92

PattiMichelle opened this issue Apr 8, 2024 · 1 comment

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@PattiMichelle
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PattiMichelle commented Apr 8, 2024 •
edited

Is it possible to add quincunx bases to obtain nonseparable transforms? Separable 2D transforms have directional-amplification artifacting. (I have not been able to get a handle on the rotation maths for this, so I don't know if this is even possible with the J code.) For example...
https://www.mathworks.com/matlabcentral/fileexchange/13507-lisq-a-toolbox-for-the-lifting-scheme-on-2d-quincunx-grids
@JeffFessler
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It was done in Matlab so it can be done in Julia.
Just a matter of someone contributing the code...

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@JeffFessler @PattiMichelle