We propose a SH-WFS centroids extraction algorithm tailored for the NVidia Jetson TX2, a compact, power-efficient ARM computer in which system and GPU memory is shared, thus eliminating the data transfer overhead. Preliminary testing on the implementation show a total elapsed time of 700us from the acquisition of a 500x500 pixels image to extraction of 18x18 centroids, which is within the specifications for an AO closed-loop frequency up to 1kHz and hence ready to be implemented in an AO controller.
Shack-Hartmann wavefront reconstructor for low-cost AO systems using power-efficient GPU
Jacopo Mocci;Federico Busato;Nicola Bombieri;Riccardo Muradore
2019-01-01
Abstract
We propose a SH-WFS centroids extraction algorithm tailored for the NVidia Jetson TX2, a compact, power-efficient ARM computer in which system and GPU memory is shared, thus eliminating the data transfer overhead. Preliminary testing on the implementation show a total elapsed time of 700us from the acquisition of a 500x500 pixels image to extraction of 18x18 centroids, which is within the specifications for an AO closed-loop frequency up to 1kHz and hence ready to be implemented in an AO controller.
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