D435ImageProfile provides array dimensions and the default depth scale for a D435-type stream. It is configuration data, not a hardware driver or a calibration estimator.
Use measured intrinsics and extrinsics for the actual device and stream mode. RGB and depth may have different calibrations and acquisition timing. Convert depth samples to metres once; an SDK-scale integer depth image is not already a metric array. Use LandmarkCamera for landmark-level synthetic observations without image processing.
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