The Boeing Company

Michael J Schaffer

Hong Hue Tat

Jason Wu

Brian T Miller

Christina I Fraij

Grant C Zenkner

Kerth J Downs

Wayne A Berry

An example system includes two objects each having a known dimension and positioned spaced apart by a known distance, and a fixture having an opening for receiving an imaging device and for holding the two objects in a field of view of the imaging device such that the field of view of the imaging device originates from a point normal to a surface of the base. The fixture holds the imaging device at a fixed distance from an object being imaged and controls an amount of incident light on the imaging device. An example method of determining image scaling includes holding an imaging device at a fixed distance from an object being imaged, and positioning the two objects in the field of view of the imaging device such that the field of view of the imaging device originates from a point normal to a line formed by the known distance.

Systems and methods of determining image scaling

An example system includes a base, two objects each having a known dimension and positioned on the base spaced apart by a known distance, an imaging device positioned such that the two objects are in a field of view of the imaging device and such that the field of view of the imaging device originates from a point normal to a surface of the base, and a computing device having one or more processors and non-transitory computer readable medium storing instructions executable by the one or more processors to perform functions. The functions include receiving an image from the imaging device capturing the two objects in the field of view, and based on one or more of the known dimension of the two objects and the known distance between the two objects, determining an image scaling factor that associates a number of pixels in the image to a physical distance.

A borescope calibration device is provided that includes a base having a planar surface and a plurality of reference surfaces on a side of the base opposing the planar surface, each of the plurality of reference surfaces having a height that decreases along a length of the base, a fixture that positions an optical head along a reference line that is parallel to the planar surface and providing a fixed distance between the reference surfaces and the optical head, the fixture being movable along a length of the base, and a target pattern formed on each of the reference surfaces.

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Olympia, WA, United States of America

Michael J Schaffer