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โCheckerboard
The checkerboard model is intended for lens grids, as an alternative to Shot/Create Lens Grid Trackers. It looks for the hour-glass crossing shape where two squares touch.
The X-finder and Checkerboard models are examples of the sort of thing that can be done, looking for a specific feature type. They arenโt infallible, though: they will miss some X marks, and see some that arenโt true marks. So some cleanup can still be required.
For what itโs worth, each network represents more than a 100 GB of training
data, and several days of training time on a multi-GPU machine.
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