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vsitzmann / siren

Official implementation of "Implicit Neural Representations with Periodic Activation Functions"
MIT License
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The insight of "out-of-range behavior" #8

Closed kwea123 closed 4 years ago

kwea123 commented 4 years ago

What exactly is the insight of studying the "out-of-range behaviour" in the notebook? The signal is not repeated on this range of (-50, 50), so...? In my opinion, I would study if the model can generalize to something larger than [-1, 1], for example if it can do some reasonable "out-painting" off the image borders, however it doesn't, as shown in the image. a

Do you think it is possible with some tweak to the network? Otherwise I don't really understand why showing this block.

vsitzmann commented 4 years ago

The reason why this is interesting is because one could assume that periodic nonlinearities mean that the function represented by SIREN is itself somehow periodic - and in fact, it very well may be, just with a period that is very, very large. This is just a little investigation into that question, which many people had voiced curiosity about.