Browse Prior Art Database

Image Buffer Control for Optical Scanners

IP.com Disclosure Number: IPCOM000086119D
Original Publication Date: 1976-Jul-01
Included in the Prior Art Database: 2005-Mar-03
Document File: 2 page(s) / 29K

Publishing Venue

IBM

Related People

Goolsbey, MA: AUTHOR [+2]

Abstract

Image-collection systems require the transfer of large volumes of data into and out of an image buffer storage. In system 10, horizontal array scanner 11 transfers digitized video data to transformation array 12, which selectively rotates image segments under the control of data processor 13. These 8-byte image segments are transferred to buffer 14 at addresses determined by control unit 15.

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Image Buffer Control for Optical Scanners

Image-collection systems require the transfer of large volumes of data into and out of an image buffer storage. In system 10, horizontal array scanner 11 transfers digitized video data to transformation array 12, which selectively rotates image segments under the control of data processor 13. These 8-byte image segments are transferred to buffer 14 at addresses determined by control unit 15.

Control unit 15 contains registers and adders which may be programmed by parameters from processor 13. The collective name PARAMETERS includes the following: MARSTART: The first address of buffer 14 to be used. MARINC: The number of addresses between horizontally adjacent image segments. HORZDIS: The total number of image segments in the horizontal direction. JUMP: The number of addresses between vertically adjacent image segments. VERTDIS: The total number of image segments in the vertical direction. LOWERBOUND: High-order bits of the buffer underflow boundary, i.e., one less than the lowest valid address. UPPERSTART: High-order address bits to be used for an underflow. UPPERBOUND: High-order bits of the buffer overflow boundary, i.e., one plus the highest valid buffer address. LOWERSTART: High-order address bits to be used for an overflow.

The following operational description of control unit 15 represents the progression of image-buffer addresses (MAR) as an image is written into buffer 14:. READ (PARAMETERS) DO J=1 TO VERTDIS MAR...