Abstract: Various implementations disclosed herein include devices, systems, and methods that present views of media objects using different viewing states determined based on context. In some implementations, a view of a 3D environment is presented. Then, a context associated with viewing one or more media objects within the 3D environment is determined, the media objects associated with data for providing an appearance of depth within the one or more media objects. Based on the context, a viewing state is determined for viewing a media object of the one or more media objects within the 3D environment, the viewing state defining whether the media object will be presented as a planar object or with depth within the media object. In accordance with a determination that the viewing state is a first viewing state, the media object is presented within the 3D environment using its associated data for providing the appearance of depth.

Abstract: In an exemplary process, a set of parameters corresponding to characteristics of a physical setting of a user is obtained. Based on the parameters, at least one display placement value and a fixed boundary location corresponding to the physical setting are obtained. In accordance with a determination that the at least one display placement value satisfies a display placement criterion, a virtual display is displayed at the fixed boundary location corresponding to the physical setting.

Abstract: Various implementations disclosed herein include devices, systems, and methods that determines a distance between a portion (e.g., top) of a person's head and the floor below as an estimate of the person's height. For example, an example process may include determining a first position on a head of a person in a three-dimensional (3D) coordinate system, the first position determined based on detecting a feature on the head based on a two-dimensional (2D) image of the person in a physical environment, determining a second position on a floor below the first position in the 3D coordinate system, and estimating a height based on determining a distance between the first position and the second position.

Abstract: Various implementations disclosed herein include devices, systems, and methods that create a 3D video that includes determining first adjustments (e.g., first transforms) to video frames (e.g., one or more RGB images and depth images per frame) to align content in a coordinate system to remove the effects of capturing camera motion. Various implementations disclosed herein include devices, systems, and methods that playback a 3D video and includes determining second adjustments (e.g., second transforms) to remove the effects of movement of a viewing electronic device relative to a viewing environment during playback of the 3D video. Some implementations distinguish static content and moving content of the video frames to playback only moving objects or facilitate concurrent playback of multiple spatially related 3D videos. The 3D video may include images, audio, or 3D video of a video-capture-device user.

Abstract: Various implementations disclosed herein include devices, systems, and methods that determines a distance between a portion (e.g., top) of a person's head and the floor below as an estimate of the person's height. For example, an example process may include determining a first position on a head of a person in a three-dimensional (3D) coordinate system, the first position determined based on detecting a feature on the head based on a two-dimensional (2D) image of the person in a physical environment, determining a second position on a floor below the first position in the 3D coordinate system, and estimating a height based on determining a distance between the first position and the second position.