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Implement convolution in the general setting #6

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b-remy opened this issue Feb 2, 2022 · 1 comment

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b-remy commented Feb 2, 2022

This issue is to document the implementation of the convolution operation against galsim.

So far we demonstrated that the convolution was working well only considering Gaussian profiles and even stamp size.

Here is a list of what I need to implement:

odd stamp size convolution
Fourier image resampling
Inverse Fourier transform with kwrapping

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b-remy commented Feb 2, 2022 •

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And I just managed to handle odd stamp size for the convolution. It is also a step further for DifferentiableUniverseInitiative/GalFlow#8 .

The demo is here: https://colab.research.google.com/drive/1bSHE1YVZMnmLGucnYpbeFxdw2EL7x8Jy?usp=sharing
this nb is a mess, but I am going to open a PR with unit test ;-)

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