Abstract: An attitude estimation apparatus includes an attitude estimation unit for estimating the roll angle and pitch angle of a movable body and for using a calculation process to estimate an offset error for at least one of first, second and third angular velocity detection units and first, second and third acceleration detection units. The attitude estimation unit estimates the roll angle and pitch angle of the movable body and the offset error for at least one detection unit based on detected values from the first, second and third angular velocity detection units, detected values from the first, second and third acceleration detection units, a detected value from the velocity information detection unit, an estimated value of the roll angle from a previous estimation operation, an estimated value of the pitch angle from the previous estimation operation, and an estimated value of the offset error from the previous estimation operation.

Abstract: Systems, methods, and non-transitory computer readable media may be configured to facilitate monitoring usage of a vehicle seat belt. An image capture device may have a field of view directed at a seat belt system of a vehicle. The image capture device may be configured to capture an image of the seat belt system. The image may be defined by image information. The image information may be obtained. Whether a seat belt of the seat belt system is or is not being used by a passenger may be determined based on an analysis of the image. An alert may be generated responsive to a determination that the seat belt is not being used by the passenger.