公开(公告)号：CA1327242C

公开(公告)日：1994-02-22

申请号：CA599555

申请日：1989-05-12

Applicant: IBM

Inventor： MORRIS HUGH M ,  PARKS CAROL A ,  PROBST ROBERT E ,  TSALALIKHIN YAKOV ,  YOUNGS GARY L ,  RAJAGOPAL DORAISWAMY

IPC: G06T1/00 ,  G06T9/00 ,  G09G5/391 ,  H04N1/21 ,  H04N1/60 ,  G06F15/64

Abstract: DUAL DENSITY DIGITAL IMAGE SYSTEM A data processing system is disclosed for storing and displaying digital images, including a workstation having a document input scanner for digitizing document images at a first resolution, an image display unit for displaying digitized document images at a second resolution which is less than the first resolution and a printer for printing digitized document images at a third resolution greater than the second resolution. The system reduces communications traffic and assures fast access time on the network since the bulk of the traffic will utilize the smaller compressed data records required for the second resolution. However, these improvements in communication traffic and access time do not sacrifice the availability of high resolution compressed data records occasionally needed for printing and other high resolution operations.