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Corrective Centering Procedure for Print Reader

IP.com Disclosure Number: IPCOM000094848D
Original Publication Date: 1965-Jun-01
Included in the Prior Art Database: 2005-Mar-06
Document File: 1 page(s) / 11K

Publishing Venue

IBM

Related People

Shelton, GL: AUTHOR

Abstract

Characters must be centered within the scanning raster of a character recognition system before data samples are taken. Where a horizontal raster scanner is employed, the following two measurements may be taken to properly center the character:

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Corrective Centering Procedure for Print Reader

Characters must be centered within the scanning raster of a character recognition system before data samples are taken. Where a horizontal raster scanner is employed, the following two measurements may be taken to properly center the character:

1) The first measurement tests to determine if a portion of the character is intercepted by the top line of the raster.

2) The second measurement determines if a portion of the character is intercepted by the bottom line of the raster.

Based on the above two measurements the following routine is executed:

1) If only the top line of the raster intercepts the character, the vertical position of the raster is moved up.

2) If only the bottom line of the raster intercepts the character, the vertical position of the raster is moved down.

3) If both the top and bottom lines of the raster intercept the character, no change in the raster position is effected since it is likely that the size of the character requires adjustment.

4) If neither the top nor the bottom line of the raster intercepts the character, the character is presumed to be properly centered.

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