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Browse Prior Art Database

Normalizing by Recognition Queuing

IP.com Disclosure Number: IPCOM000094078D
Original Publication Date: 1966-May-01
Included in the Prior Art Database: 2005-Mar-06
Document File: 2 page(s) / 39K

Publishing Venue

IBM

Related People

Cutaia, A: AUTHOR

Abstract

Character normalization is accomplished by presetting scanner control 10 so as to effect raster scanning of the first character on document 11 at a maximum height. In this instance, the maximum height is 160 mils. The first character is then raster scanned for recognition. Measurements are made by logic 15 on the data derived by raster scanning with cathode ray tube 12 and photomultiplier 13. These measurements are cross-correlated by 17 with references 16 representing MCD and the character identification obtained by cross-correlation are stored.

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Normalizing by Recognition Queuing

Character normalization is accomplished by presetting scanner control 10 so as to effect raster scanning of the first character on document 11 at a maximum height. In this instance, the maximum height is 160 mils. The first character is then raster scanned for recognition. Measurements are made by logic 15 on the data derived by raster scanning with cathode ray tube 12 and photomultiplier 13. These measurements are cross-correlated by 17 with references 16 representing MCD and the character identification obtained by cross-correlation are stored.

The character is then rescanned with a scan height of 152 mils. The MCD and character ID results are stored if they are better than the results obtained with the scan height of 160 mils. The character is again rescanned but with a scan height of 143 mils. The MCD and characters ID results are then compared with the best previous results. In this particular example, the scan at 143 mils is the minimum scan height. The normalized scan height is the one which produces character recognition with the highest confidence. If a reject or conflict recognition decision is generated, no action is taken. The remaining characters on the document or in a particular field are then scanned at the normalized scan height.

The number of normalization heights used depends upon the degree of height resolution necessary to meet the recognition performance required. Only one minimum correlation difference MCD...