[Object] To provide a shape measurement apparatus that, in measuring the unevenness shape of a measurement object by a light-section method, enables the shape of the measurement object to be measured precisely even when the distance between the measurement object and an image capturing apparatus fluctuates. [Solution] Provided is a shape measurement apparatus including: a linear light position detection unit that detects, from a captured image of linear light applied to a measurement object by a linear light irradiation apparatus that is captured by an image capturing apparatus, a linear light position of the linear light; a distance computation unit that computes a distance from the image capturing apparatus to the measurement object, on the basis of a distance difference between a reference linear light position detected by the linear light position detection unit when the measurement object is positioned at a position of a predetermined reference distance from the image capturing apparatus and the linear light position detected by the linear light position detection unit, the reference distance, and an angle formed by an optical axis of the image capturing apparatus and an emission direction of the linear light; a focus adjustment unit that adjusts focus of the image capturing apparatus on the basis of the distance from the image capturing apparatus to the measurement object; and a shape computation unit that computes a shape of the measurement object on the basis of the captured image.

A three-dimensional measurement apparatus includes an image obtainer, a search unit, and a distance calculator. The image obtainer obtains, from an imaging device that creates a distance image where a distance value representing an imaging distance at each position within an imaging angle of view is given to a pixel at the position, the distance image. The search unit searches the distance image for a specific pixel whose distance value is a predetermined specific value. The distance calculator calculates an imaging distance of the specific pixel by referring to pixels positioned across the specific pixel.

A three-dimensional measurement apparatus includes an image obtainer, a search unit, and a distance calculator. The image obtainer obtains, from an imaging device that creates a distance image where a distance value representing an imaging distance at each position within an imaging angle of view is given to a pixel at the position, the distance image. The search unit searches the distance image for a specific pixel whose distance value is a predetermined specific value. The distance calculator calculates an imaging distance of the specific pixel by referring to pixels positioned across the specific pixel.

[Object] To provide a shape measurement apparatus that, in measuring the unevenness shape of a measurement object by a light-section method, enables the shape of the measurement object to be measured precisely even when the distance between the measurement object and an image capturing apparatus fluctuates.

[Solution] Provided is a shape measurement apparatus including: a linear light position detection unit that detects, from a captured image of linear light applied to a measurement object by a linear light irradiation apparatus that is captured by an image capturing apparatus, a linear light position of the linear light; a distance computation unit that computes a distance from the image capturing apparatus to the measurement object, on the basis of a distance difference between a reference linear light position detected by the linear light position detection unit when the measurement object is positioned at a position of a predetermined reference distance from the image capturing apparatus and the linear light position detected by the linear light position detection unit, the reference distance, and an angle formed by an optical axis of the image capturing apparatus and an emission direction of the linear light; a focus adjustment unit that adjusts focus of the image capturing apparatus on the basis of the distance from the image capturing apparatus to the measurement object; and a shape computation unit that computes a shape of the measurement object on the basis of the captured image.

Systems and methods are disclosed for tank level monitoring. To perform monitoring of fuel levels of fuel tanks, tank level monitor devices may be affixed to the fuel tanks. The tank level monitors may be used to provide data relating to the fuel tanks to a remote location (such as a mobile device application). A predictive algorithm may also be implemented to more effectively schedule refueling events for various fuel tanks.