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Proceedings Paper

Very high resolution scanner and image processing system
Author(s): David C. Gibbon; Richard V. Kollarits
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Paper Abstract

A high-resolution imaging system employing a CCD line scan camera has been constructed with a resolution of 6000 x 6000 x 12 bits per pixel per color component with a variable pixel aspect ratio. The raw image data is processed in real time to correct for one dimensional artifacts arising from the sensor dark current signal as well as gain and integration control nonuniformities. The gain nonuniformity correction includes second order effects. Two dimensional artifacts attributable to sensor window defects are also removed. The system''s noise performance is found to be limited primarily by sensor shot noise and uncorrected sensor nonuniformities. For most images the system noise is below the visible threshold. This still imaging system has been used to digitize color transparencies up to 6 X 6cm including 35 and 70mm motion picture film for HDTV motion test sequences. 1. OVERVIEW AND DESIGN CONSIDERATIONS The CCD line scan camera described in this paper was designed as a laboratory system to be used as a source of high quality image data for visual communications research. A block diagram of the system is shown in Figure 1. The intent was to produce digital images of sufficient resolution and quality to meet the needs of HDTV researchers for the foreseeable future in fact the scanner''s resolution far exceeds that of present display technology. Output image quality was the primary design consideration and attention

Paper Details

Date Published: 12 August 1992
PDF: 8 pages
Proc. SPIE 1656, High-Resolution Sensors and Hybrid Systems, (12 August 1992); doi: 10.1117/12.135902
Show Author Affiliations
David C. Gibbon, AT&T Labs. Research Corp. (United States)
Richard V. Kollarits, AT&T Labs. Research Corp. (United States)


Published in SPIE Proceedings Vol. 1656:
High-Resolution Sensors and Hybrid Systems
Morley M. Blouke; Winchyi Chang; Laurence J. Thorpe; Rajinder P. Khosla, Editor(s)

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