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System for Converting Resolution Disclosure Number: IPCOM000058592D
Original Publication Date: 1988-Nov-01
Included in the Prior Art Database: 2005-Feb-15

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Asano, H Shirai, H [+details]


This article describes a system for converting a resolution scanned by an image scanner, which includes an address table storing address information for various resolutions. In response to a selected resolution, the address information in the address table is selectively fetched and combined to make pel addresses for the selected resolution. Fig. 1 shows an original document scanned by an image scanner. It is assumed that a scan resolution of the image scanner is 300 picture elements (pels)/inch. The pels of the image of the original document are blocked into 300 x 300-pel blocks. The 300-pel resolution is converted to a resolution represented by a sum of any combination of 150, 75, 38, 18, 9, 5, 3 and 1, shown in the following address table. The resolution is converted in both the X and Y directions.