Abstract: An example head-mounted device includes: a frame to nest the device on a head of a user; a biosensor disposed on the frame, the biosensor to: detect a biological characteristic of the user; generate a signal representing the biological characteristic of the user; and a power management controller coupled to the biosensor, the controller to, when the signal corresponds to a predefined profile, determine that the head-mounted device is in a transitional state and change a power state of the head-mounted device based on the transitional state.

Abstract: A depth image is acquired using a time-of-flight (ToF) camera. The depth image has two-dimensional (2D) pixels on a plane of the depth image. The 2D pixels correspond to projections of three-dimensional (3D) pixels in a real space onto the plane. For each 3D pixel, 3D coordinates within a 3D camera coordinate system of the real space are calculated based on 2D coordinates of the 2D pixel to which the 3D pixel corresponds within a 2D image coordinate system of the plane, the depth image, and camera parameters of the ToF camera. The 3D pixels are mapped from the real space to a virtual space. An object within the real space within an image of the virtual space is reconstructed using the 3D pixels as mapped to the virtual space.