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1. (WO2003062942) A METHOD FOR DIGITAL COLOR GRADING OF GEMS AND COMMUNICATION THEREOF

Pub. No.:    WO/2003/062942    International Application No.:    PCT/IL2002/001057
Publication Date: Jul 31, 2003 International Filing Date: Dec 31, 2002
IPC: G01J 3/46
G01J 3/52
G01N 21/27
G01N 21/87
Applicants: SEVDERMISH, Menahem
Inventors: SEVDERMISH, Menahem
Title: A METHOD FOR DIGITAL COLOR GRADING OF GEMS AND COMMUNICATION THEREOF
Abstract:
A computer based expert system and method of grading gems by their inherent properties of shape and color, including hue-tone-saturation. Each of the properties is variable over a practical range derived from a data-base; the database prepared by digital methods from real gems.The grading is conducted interactively on-screen by visual comparison to the image of a real target gem, and the result, translated into alpha-numeric code, can be communicated by phone or via the Internet to any other user of the same system and data-base. The communicated code can be reconstructed by the system into an identical gem image, enabling remote discussion and evaluation of the same target gem, including matching and pairing of gems.A practical embodiment of the grading system and method is described, including application modes specifically aimed at gems and diamonds.