Registration of airborne scanner imagery using AKIMA quintic polynomial interpolation

Conference · Fri Nov 01 04:00:00 EST 1996

OSTI ID:390720

Wiemker, F ^[1]

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1. Universitaet Hamburg, Hamburg (Germany)

Evaluation and analysis of most remotely sensed data requires careful image-to-image registration or ortho-rectification (geocoding). Photogrammetric practice has shown that polynomial transformation functions are useful for registration of aerial photographs. However, multi- and hyperspectral remotely sensed data are often recorded by airborne line scanners. Then ortho-rectification by conventional global coordinate transforms is not satisfactory, particularly due to the non-instantaneous image formation process. It is rather necessary to allow for local corrections of distortions. We have implemented two interpolation techniques for the computation of the resampling coordinates, local AKIMA and HARDY multiquadric interpolation, and applied them to experimental image data. Comparison shows that resampling based on AKIMA interpolation is much faster than on HARDY multiquadric. Moreover, AKIMA interpolation in the limit corresponds to conventional second degree polynomial transformation. It is thus an appropriate instrument for local image registration utilizing ground control points. 6 refs., 4 figs.

• OSTI ID: 390720
• Report Number(s): CONF-960613--
• Country of Publication: United States
• Language: English

Related Subjects

99 GENERAL AND MISCELLANEOUS
AERIAL MONITORING
AERIAL SURVEYING
DATA PROCESSING
GEOPHYSICAL SURVEYS
IMAGE PROCESSING
INTERPOLATION
MULTISPECTRAL SCANNERS
ORTHOGONAL TRANSFORMATIONS
POLYNOMIALS
TOPOLOGICAL MAPPING