Browse Prior Art Database

Indicium Recognition

IP.com Disclosure Number: IPCOM000096513D
Original Publication Date: 1963-Jun-01
Included in the Prior Art Database: 2005-Mar-07
Document File: 2 page(s) / 40K

Publishing Venue

IBM

Related People

Goetz, WE: AUTHOR [+2]

Abstract

This is an optical reading system for indicium recognition apparatus which corrects for character misalignment. A character on a moving document is scanned by imaging it twice through a lens and a biprism onto a slit. Behind this is an array of photocells. The height of the slit, the height of the character image and the height of the array of photocells are equal.

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Indicium Recognition

This is an optical reading system for indicium recognition apparatus which corrects for character misalignment. A character on a moving document is scanned by imaging it twice through a lens and a biprism onto a slit. Behind this is an array of photocells. The height of the slit, the height of the character image and the height of the array of photocells are equal.

The drawing shows, in the object plane, a character in the normal position and in two maximally misaligned positions and, in the image plane, the images of these characters. For the maximally misaligned characters,.one of the two images coincides with the slit and photocell area. For the normal image, the slit and photocell area is covered by complementary halves of the two character images. For intermediate misalignments this area is covered by complementary parts.

The photocells feed signals to a matrix. The representation of the character in this matrix is rolled until recognition occurs. The biprism permits use of an array of photocells equal to the height of the character. Other systems require double number of photocells and channel reduction devices.

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