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NON-INTEGER INTERPOLATION WITH PARALLEL PIXEL DELETE

IP.com Disclosure Number: IPCOM000024607D
Original Publication Date: 1981-Apr-30
Included in the Prior Art Database: 2004-Apr-02

Publishing Venue

Xerox Disclosure Journal

Abstract

In electronic imaging it is often desirable to produce an output with a pixel spatial sample rate different from that of the input. Pixel throw-away can be used to produce an output with fewer pixels per inch; linear interpolation can be used to provide increased sample rate. Simple digital interpolation provides integer multiplication of the input rate. Thus, some combination of integer multiplication and pixel throw-away must be used to provide non-integer rate changes. Pixel throw-away is usually accomplished with a digital rate multiplier acting on the pixel clock. In the arrangement proposed herein, a parallel pixel throw-away is used to provide enhanced circuit simplicity and stability.