Image Digitization Using A Self-Scanned Linear Photodiode Array

Thomas Lianza; Philip S. Considine; Norv Stapelfeld

doi:10.1117/12.956677

7 December 1978 Image Digitization Using A Self-Scanned Linear Photodiode Array

Thomas Lianza, Philip S. Considine, Norv Stapelfeld

Proceedings Volume 0149, Digital Image Processing II; (1978) https://doi.org/10.1117/12.956677
Event: 22nd Annual Technical Symposium, 1978, San Diego, United States

Abstract

A new Image Digitizer has been developed for digitization of photographic transparencies for digital image processing. This system uses a linear, 1024 element CCPD array mounted on a linear stage to produce a 1024 x 1024 pixel sampled output. The Image Digitizer has several flexible and unique capabilities. It has continuous zoom magnification over a log range. Picture sample spacing is adjustable from 1.6µm to 16µm, giving a scan format capability from 1.6 to 16mm . The system contains a focus indicator and adjusts to film transmittance by integration time control and source brightness control. In this manner the full 2500:1 dynamic range of the detector is used for film transmittance sampling. The ID has a rear projection viewing display for alignment and scaling of the input transparency. In this paper we will discuss the technology of self-scanned linear detector arrays in image digitization. This will include design parameters, measurement accuracy capabilities and test results.

Citation Download Citation

Thomas Lianza, Philip S. Considine, and Norv Stapelfeld "Image Digitization Using A Self-Scanned Linear Photodiode Array", Proc. SPIE 0149, Digital Image Processing II, (7 December 1978); https://doi.org/10.1117/12.956677

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