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Image Processing with a Modular Display

IP.com Disclosure Number: IPCOM000088328D
Original Publication Date: 1977-May-01
Included in the Prior Art Database: 2005-Mar-04
Document File: 2 page(s) / 35K

Publishing Venue

IBM

Related People

Addy, J: AUTHOR [+2]

Abstract

A display screen 1 (Fig. 1) consists of display modules 2 abutted to form the required image area. The stored image is comprised of segments 3 of varying length and orientation. This article sketches one way of providing for segments which cross module boundaries, such as at 4.

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Image Processing with a Modular Display

A display screen 1 (Fig. 1) consists of display modules 2 abutted to form the required image area. The stored image is comprised of segments 3 of varying length and orientation. This article sketches one way of providing for segments which cross module boundaries, such as at 4.

Segment descriptions are held in a segment list (Fig. 2) in Y coordinate order, those segments ending at a given Y coordinate being considered as belonging to the same line and being ordered by X coordinate. A module boundary is treated as an end of segment with a new segment starting on the other side of the boundary. An image is encoded top down and left to right into segments. Each segment is described by a segment word which contains a code characterizing the segment, e.g., by length and orientation, and an offset which defines the distance along the X axis between the starting point of the segment and that of the preceding segment of the list in the same module, or that of the edge of the module if there is no preceding segment with the same Y address.

As a segment is coded, the address in the segment list of the segment word is placed in a module key word in a module key area of storage. Each module key word is associated with a particular display module, either by its position in the module key area or preferably, to give a choice of module definition, by means of a module identifier field. When a segment crosses a vertical boundary of a modul...