Abstract

The present invention is a method for visualizing a two dimensional field of orientation data on a surface which may be (flat or curved). A unit polyhedron is constructed which approximates a unit sphere centered at a point on the surface corresponding to the orientation vector. Colors are assigned to facets of the polyhedron such that adjacent facets have similar colors. Orientation vectors are projected onto facets of the polyhedron, and the surface point which is associated with the orientation vector is color coded with the color of the intersected facet. The method can be used in geology, metallurgy, stereology, and any other domain where a large set of orientation data is collected.

Other References

• Schroeder et al., "The Stream Polygon: A Technique for 3D Vector Field Visualization", IEEE Visualization Conference, 1991, pp. 126-132
• Rao et al., "Computerized Flow Field Analysis: Oriented Texture Fields", IEEE Transaction on Pattern Analysis and Machine Interlligence, vol. 14, No. 7, Jul. 1992, pp. 693-709
• Foley et al., Computer Graphics: Principles and Practice, Addison-Wesley Publishing Company, Inc., 1990, pp. 584-591
• "A Review of Automated Orientation Imaging Microscopy (OIM)" by Stuart I. Wright, Journal of Computer-Assisted Microscopy, vol. 5, No. 3, 1993, pp. 207-221
• "Preferred Orientation in Deformed Metals and Rocks: An Introduction to Modern Texture Analysis" by Hans-Rudolf Wenk, ed., Academic Press, 1985, p.11
• "Orientation Mapping" by F. C. Frank, Met. Trans., 19A, (1988), 403
• "Review, Microtexture Determination by Electron Back-Scatter Diffraction" by D. J. Dingley, V. Randle, Journal of Material Sci. 27, 1992, pp. 4545-4566
• "Visualizing Polycrystalline Orientation Microstructure With Spherical Color Maps" by B. Yamrom, J. A. Sutliff and A. P. Woodfield, General Electric Research & Development Center Paper, Apr. 1994, pp. 1-11
• "Visualizing Polycrystalline Orientaitron Microstructure With Spherical Color Maps", by B. Yamorom, J. A. Sutliff and A. P. Woodfield, Overhead Slides to be used in connection with a presentation at Visualization '94, Sheraton Premier at Tysons Corner, Vienna, VA, Oct. 1994
• "Visualizing Polycrystalline Orientation Microstructure with Spherical Color Maps" by B. Yamrom, J. A. Sutliff anf A. P. Woodfield, Overhead paper to be presented at Visualization '94, Sheraton Premier at Tysons Corner, Vienna, VA., Oct. 1994
• "Application of a New Lattice Orientation Measurement Technique to Polycrystalline Alluminum" by S. I. Wright, B. L. Adams, K. Kunze, Materials Science and Eng., A160, pp. 229-240 (1993