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Brightness controls for visual separation of vector and raster information

  • US 5,499,325 A
  • Filed: 06/07/1995
  • Issued: 03/12/1996
  • Est. Priority Date: 08/20/1992
  • Status: Expired due to Fees
First Claim
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1. A method for enabling images on a display screen generated from raster data to be visually distinguished from images on the same screen generated from vector data, in a modeling system that includes a color table partitioned into a first set of color table entries each dedicated exclusively for specifying the color of raster data and a mutually exclusive second set of color table entries each dedicated exclusively for specifying the color of vector data, comprising the steps of:

  • (a) controlling the brightness of raster data images on said screen directly in response to a first control signal, generated in real time by a first control means, which causes all of the entries located in said first set of color table entries to be incrementally modified simultaneously to thereby adjust the brightness of all raster data images displayed during a given display cycle, via a single user operation in which color table entry modification is transparent to the user; and

    (b) controlling the brightness of vector data images on said screen directly in response to a second control signal, generated in real time by a second control means, which causes all of the entries located in said second set of color table entries to be incrementally modified simultaneously to thereby adjust the brightness of all vector data images displayed during a given display cycle via a single user operation in which color table entry modification is transparent to the user,whereby the user is able to view an animated color differentiation between vector and raster data as the user adjusts vector and/or raster data image brightness.

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