Trimble Inc.

Chad McFadden

James M Janky

Nicholas Charles Talbot

Peter Van Wyck Loomis

Shawn D Weisenburger

Richard W Rudow

Michael V McCusker

Christian Grässer

Robert Wold

Venkateswaran Kasirajan

Troy Lane Brown

Shaojun He

Amit Joshi

Christian GRÄSSER

Novel tools and techniques that can be used to enhance the effectiveness of photogrammetric tools, such as bundle adjustment. One set of techniques can include a photo-observable backsight operation, in which a position of target point can be observed non-photographically, and this observed position can be used to constrain a pixel coordinate location of the same target point in a bundle adjustment operation. Using another technique, a photo-observable check shot operation, the observed position of another target point can be used to verify the validity of a bundle adjustment calculation. Such techniques can be used together or separately.

Enhanced bundle adjustment techniques

A plurality of images are captured by an image capturing device that is an integral part of the mobile data collection platform from at least two different perspectives that depict a point of interest in a scene. Coincident with capture of each of the plurality of images, orientation information is obtained via orientation sensors of the mobile data collection platform, a position fix of an antenna associated with the mobile data collection platform is determined, and a position of an entrance pupil of the image capturing device is calculated. Scale information associated with at least one of the images is captured. Scene data comprises the images, the orientation information and the entrance pupil positions. A three dimensional position of the point of interest at the scene is determined based on photogrammetric image processing of the scene data.

Scene documentation

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Lafayette, CO, United States of America

Chad McFadden