Forward and backward looking vision system

A method comprising:

• using a projector to project an image in a projection direction onto a surface;
• determining that the projection direction relative to the surface is in a substantially vertical direction;
• based at least partly on determining that the projection direction relative to the surface is in the substantially vertical direction, emitting first non-visible light into a first gesture area toward the projection direction;
• receiving a first reflected portion of the first non-visible light;
• based at least partly on the first reflected portion of the first non-visible light, detecting one or more first gestures made in the first gesture area;
• determining that the projection direction relative to the surface is in a substantially horizontal direction;
• based at least partly on determining that the projection direction relative to the surface is in the substantially horizontal direction, emitting second non-visible light into a second gesture area away from the projection direction;
• receiving a second reflected portion of the second non-visible light;
• and
• based at least partly on the second reflected portion of the second non-visible light, detecting one or more second gestures made in the second gesture area.

A system comprising:

• a first lens to pass first projected content to and to receive first reflected non-visible light from a first field of view in a substantially vertical direction;
• a second lens to pass second projected content to and to receive second reflected non-visible light from a second field of view in a substantially horizontal direction;
• at least one light emitter to project light in a projection direction relative to a surface, the at least one light emitter to:
• emit first non-visible light in the substantially vertical direction into the first field of view, the substantially vertical direction being the projection direction;
• and
• emit second non-visible light in the substantially horizontal direction into the second field of view, the substantially horizontal direction being away from the projection direction;
• at least one light sensor to receive the first reflected non-visible light through the first lens in the substantially vertical direction and to receive the second reflected non-visible light through the second lens in the substantially horizontal direction;
• and
• a processor configured to receive information related to at least one of one or more first gestures detected based at least partly on the first reflected non-visible light or one or more second gestures detected based at least partly on the second reflected non-visible light.

One or more non-transitory computer-readable media comprising instructions which, when executed by one or more processors, cause the one or more processors to perform operations comprising:

• determining at least one of:
• first orientation information corresponding to at least one of a projector, a projection display surface, or the projector relative to the projection display surface;
• or
• first presence information indicating a presence of at least a portion of a user within a field of view in a projection direction;
• based at least in part on at least one of the first orientation information or the first presence information, emitting non-visible light in a first direction toward the projection direction of the projector;
• determining at least one of:
• second orientation information corresponding to at least one of the projector, the projection display surface, or the projector relative to the projection display surface;
• or
• second presence information indicating a presence of at least a portion of the user or another user within a second field of view away from the projection direction and
• based at least in part on at least one of the second orientation information or the second presence information, emitting the non-visible light in a second direction away from the projection direction of the projector.

A method comprising:

• using a projector to project an image in a projection direction;
• determining a first orientation of a projection surface relative to the projector;
• emitting first non-visible light in a first direction toward the projection direction if based at least partly on a determination that an orientation of the projection surface is substantially in the first orientation;
• receiving, by at least one light sensor, a first reflected portion of the first non-visible light through a first lens;
• determining a change from the first orientation of the projection surface relative to the projector to a second orientation of the projection surface relative to the projector;
• emitting second non-visible light in a second direction away from the projection direction based at least in part on the change;
• and
• receiving, by the at least one light sensor, the first reflected portion of the first non-visible light through the first lens and a second reflected portion of the second non-visible light through a second lens.