Dismiss
InnovationQ will be updated on Sunday, Oct. 22, from 10am ET - noon. You may experience brief service interruptions during that time.
Browse Prior Art Database

Method for Scrolling an Image Displayed with Attributive Data

IP.com Disclosure Number: IPCOM000113661D
Original Publication Date: 1994-Sep-01
Included in the Prior Art Database: 2005-Mar-27
Document File: 4 page(s) / 133K

Publishing Venue

IBM

Related People

Kimura, M: AUTHOR

Abstract

Disclosed is a method for effectively scrolling an image displayed with attributive objects in a graphic display with a single frame buffer. The method consists of a procedure for (1) removing the objects by redrawing the image in areas where they reside, (2) scrolling the image fast, using the display's function of area copying, and (3) recovering the objects by redrawing them.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 70% of the total text.

Method for Scrolling an Image Displayed with Attributive Data

      Disclosed is a method for effectively scrolling an image
displayed with attributive objects in a graphic display with a single
frame buffer.  The method consists of a procedure for (1) removing
the objects by redrawing the image in areas where they reside, (2)
scrolling the image fast, using the display's function of area
copying, and (3) recovering the objects by redrawing them.

      Medical imaging facilities such as X-ray Computed Tomography
(X-CT) and Magnetic Resonance Imaging (MRI) have convensionally
adopted a style of displaying an image together with attributive
data, mainly to save space.  However, it is difficut for most
computer workstations to follow this popular display style because,
unlike imaging facilities, they do not have special hardware for
images.  One of the problems for such workstations is how to scroll
an image with attributive data smoothly.  They cannont draw the whole
of a large image quickly.  Though they have a rather fast function
for area copying on their display, attributive objects drawn in the
same frame buffer with the image are also copied and left as garbage.

      The disclosed method solves this problem.  The key is to remove
attributive objects first, and then to use a fast area-copying
function.  Because the areas occupied by attributive objects are
usually much smaller than the whole image, the redrawing of these
areas is much faster.  The...