✨ Add on-the-fly Registered Slide Visualization #875
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shaneahmed
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This PR is a rough draft of code to allow a registration transform to be loaded as an 'overlay', which will allow the slide to be viewed as if that registration transform had been applied to it. This will work with either an affine transformation saved as a .npy, or a non-rigid one represented by a SimpleITK displacement field saved as a .mha (such as what would be output by DeeperHistoReg, for example).
It introduces a new WSIReader subclass called TransformedWSIReader, which when initialized with a slide and transformation will apply the transformation on the fly when regions are requested.
It also adds '.npy' and '.mha' to the overlay types the visualization tool picks up; upon loading one of these types, the current slide will be opened as a TransformedWSIReader with that transform, allowing it to be visualized on the fly as a registered slide.
still to do: