Apparatus and methods for assessment, evaluation and grading of gemstones

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 8436986
APP PUB NO 20100111354A1
SERIAL NO

12450652

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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An apparatus (10) for assessment, evaluation and grading of gemstones has a stage (11) upon which a gemstone may be supported, the stage being enclosed in a housing (15) that is impervious to light. At least one light source (14) located in the housing is adapted to project incident light onto the gemstone. There are means for rotating and tilting the stage so as to vary the orientation of the gemstone to the incident light. A digital camera (16) is located in the housing adjacent the or each light source and is adapted to take images of the gemstone based on reflection and/or refraction of the incident light. There are also information processing means for calibrating and analyzing the images, with the information processing means being programmed with an instruction set for color calibrating the images and then analyzing the color calibrated images by segmentation and histogram measurement.

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Patent Owner(s)

  • OPAL PRODUCERS AUSTRALIA LIMITED

International Classification(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Bischof, Leanne Putney, AU 2 27
Hilsenstein, Volker St. Lucia, AU 2 46
Hornabrook, Angus Nelson Clagiraba, AU 2 27
Hornabrook, Graham Alfred Dubbo, AU 2 46
Imrie, Robert George Gulargambone, AU 2 46
Lagerstrom, Ryan Stanmore, AU 4 70
Lummis, Rodney Herbert Tamworth, AU 2 46
Marchant, Stuart Norman Alstonville, AU 1 17
Primmer, Kathryn Elizabeth Appin, AU 2 46
Sutton, Peter Bruce Dubbo, AU 2 46

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