Abstract: In one embodiment, a method includes displaying, through a head-mounted display (HMD), virtual objects to a user wearing the HMD. The method then accesses a boundary definition that corresponds to a boundary within a physical space surrounding the user and generates a plurality of spatial points based on depth measurements of physical objects within the physical space. Based on the spatial points, a location at which a physical object is likely to exist is determined. The method determines whether the location of the physical object is inside the boundary definition and, in response to this determination, issues an alert to the user.

Abstract: A depth camera assembly (DCA) determines depth information for a local area. The DCA includes a plurality of cameras and at least one illuminator. The DCA dynamically determines depth sensing modes (e.g., passive stereo, active stereo, structured stereo) based in part on the surrounding environment and/or user activity. The DCA uses the depth information to update a depth model describing the local area. The DCA may determine that a portion of the depth information associated with some of portion of the local area is not accurate. The DCA may then select a different depth sensing mode for the portion of the local area and update the depth model with the additional depth information. In some embodiments, the DCA may update the depth model by utilizing a machine learning model to generate a refined depth model.

Abstract: In one embodiment, a method includes displaying, through a head-mounted display (HMD), virtual objects to a user wearing the HMD. The method then accesses a boundary definition that corresponds to a boundary within a physical space surrounding the user and generates a plurality of spatial points based on depth measurements of physical objects within the physical space. Based on the spatial points, a location at which a physical object is likely to exist is determined. The method determines whether the location of the physical object is inside the boundary definition and, in response to this determination, issues an alert to the user.