Browse Prior Art Database

Vidicon Multi Image Scanner

IP.com Disclosure Number: IPCOM000090592D
Original Publication Date: 1969-May-01
Included in the Prior Art Database: 2005-Mar-05
Document File: 2 page(s) / 39K

Publishing Venue

IBM

Related People

Spiegel, WJ: AUTHOR

Abstract

The optical scanning system at A utilizes a vidicon tube, the face of which is indicated at 3. On this there is projected in a plurality of areas a corresponding plurality of images of a character bearing area, indicated at 5. A plurality of optical systems indicated by 7 project corresponding images onto face 3. Reflective lighting is provided by light sources 9.

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Vidicon Multi Image Scanner

The optical scanning system at A utilizes a vidicon tube, the face of which is indicated at 3. On this there is projected in a plurality of areas a corresponding plurality of images of a character bearing area, indicated at 5. A plurality of optical systems indicated by 7 project corresponding images onto face 3. Reflective lighting is provided by light sources 9.

At B, the functional partitioning of the vidicon is shown. The first image is scanned for prescan operations such as finding the location of the line of print and measuring the physical dimensions of the characters for the purpose of normalization. This image can also be used for measuring contrast and reflectance variations for subsequent video signal pre-analysis processing. Determination of the location of the line of print can be used to accomplish extraneous data blanking during subsequent recognition scans. Upon completion of the prescanning operations, one of the three remaining images is scanned for the purpose of character recognition. The remaining two images are available for rescan purposes.

The functional partitioning shown at C can be used in the event any difficulty is encountered from raster burn in the vidicon tube. The first image is scanned for prescanning purposes as described. On completion of the prescan, one of the three remaining images is scanned for the purposes of character recognition. The selection as to which of the three remaining images is to b...