METHOD AND APPARATUS FOR PRODUCING DIGITAL ORTHOPHOTOS

WIPO Patent Application WO2002029360

A3

A method and system for producing digital orthophotos form imagery acquired as full or sparse stereo. The orthophotos can be produced in a variety of map coordinate systems without the need to convert or recompute DEM or photogrammetric solution data. In one embodiment, a two dimensional, planimetric free-network solution, utilizing arbitrary datum definition constraints, is used to provide a transitory coordinate system that is used to facilitate the image measurement process. It is utilized as a preliminary step to refine apriori block layout information to facilitate point picking and to provide general quality control capabilities before undertaking a rigorous 3D photogrammetric adjustment. In place of a general map conversion transformation, an identity transformation can be used, so that map coordinates and world coordinates are identical. With this process, given DEM data and photogrammetric solution data in a particular coordinate system, the orthophoto image data can be produced in any map coordinate system.

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KNOPP DAVID K

PCT/US2001/030983

July 11, 2002

October 04, 2001

Click for automatic bibliography generation  

PIXXURES INC (US)

G01C11/06; (IPC1-7): G01C11/06

US5808626A	1998-09-15
US6064760A	2000-05-16

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