Spatial resolution enhancement and dynamic range extending of a computerized airborne multicamera imaging system

Xiuhong Sun; James J. Baker; Bruce Ryan; Donald E. Florence

doi:10.1117/12.381625

Abstract

This paper describes the spatial resolution enhancement and dynamic range extending technologies for a Computerized Airborne Multicamera Imaging System (CAMIS). CAMIS is a commercially available multispectral imaging system for diverse manned and unmanned aerial vehicles to fly along flexible paths and altitudes for a wide variety of applications. The current version of CAMIS consists of four spectral bands of progressive scan CCD video cameras with 782 X 576 square pixels each, giving a total of 1.82 million effective pixels. These cameras are synchronized and aligned in parallel with sub-pixel-accurate spatial offsets over a common field of view. A software procedure interpolates the original four-band 782 X 576 captures into 1564 X 1152 ones using a bilinear algorithm, and then performs geometric correction and band-to-band pixel registration. The result is a more precisely registered, spatial resolution enhanced multispectral image, sized 1540(H) X 1140(V) X 4 (Bytes). The CAMIS CCD cameras also feature a controllable electronic shutter, which permits the system to acquire a desirable range of signals by a computed exposure, and then bracket it with two additional up/down-stepped exposures into computer memory. The integrated data set of the multiple stepped exposures can effectively extend the dynamic range of the measurement.

Citation Download Citation

Xiuhong Sun, Xiuhong Sun, James J. Baker, James J. Baker, Bruce Ryan, Bruce Ryan, Donald E. Florence, Donald E. Florence, } "Spatial resolution enhancement and dynamic range extending of a computerized airborne multicamera imaging system", Proc. SPIE 4051, Sensor Fusion: Architectures, Algorithms, and Applications IV, (3 April 2000); doi: 10.1117/12.381625; https://doi.org/10.1117/12.381625

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