Browse Prior Art Database

Color Technique for Surface Property Display

IP.com Disclosure Number: IPCOM000120316D
Original Publication Date: 1991-Apr-01
Included in the Prior Art Database: 2005-Apr-02
Document File: 1 page(s) / 48K

Publishing Venue

IBM

Related People

Phippen, RW: AUTHOR [+2]

Abstract

A software graphics interactive method to display the differences between two surface properties using color is described. Areas of application include CAD and graphic art.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 63% of the total text.

Color Technique for Surface Property Display

      A software graphics interactive method to display the
differences between two surface properties using color is described.
Areas of application include CAD and graphic art.

      Currently there is a lack of interactive techniques to display
the difference between two surface properties after a set of points
of surface difference have been calculated. This disclosure solves
the problem of displaying the difference and emphasizes significant
features of a solid object.

      A well-known technique for the graphical representation of
numerical information is the use of color (for example, equivalent
altitudes on a terrain map are often represented by the same color).
This involves choosing an appropriate mapping from scalar value in
the data to the color in the graphical representation.

      To maximize the clarity of this technique, an existing
value-color mapping has been chosen which allows for the ability of
the human eye to differentiate more finely between colors in the
green-yellow range of the spectrum than it can between colors in the
red or the blue ranges of the spectrum.  By mapping the greater
proportion of the scalar values into the green-yellow area of the
spectrum, it achieves an apparently linear scale of value versus
color.

      This mapping has been adapted to emphasize the color variation
in sub-ranges of the scalar values which are of particular interest,
and de-emphasize the co...