Automated opal grading by imaging and statistical learning
Quantitative grading of opals is a challenging task even for skilled opal assessors. Current
opal evaluation practices are highly subjective due to the complexities of opal assessment …
opal evaluation practices are highly subjective due to the complexities of opal assessment …
Apparatus and method for fluorescence grading of gemstones
H Takahashi - US Patent 10,107,757, 2018 - Google Patents
Provided herein is an apparatus for assessing a fluorescence characteristic of a gemstone.
The apparatus comprises an optically opaque platform for supporting a gemstone to be …
The apparatus comprises an optically opaque platform for supporting a gemstone to be …
Apparatus and method for fluorescence grading of gemstones
H Takahashi - US Patent 10,488,341, 2019 - Google Patents
Provided herein is an apparatus for assessing a fluorescence characteristic of a gemstone.
The apparatus comprises an optically opaque platform for supporting a gemstone to be …
The apparatus comprises an optically opaque platform for supporting a gemstone to be …
Method and system for certification and verification of gemstones
TH Koh, SL Teng - US Patent 10,733,615, 2020 - Google Patents
The present invention discloses a method and system for certifying and verifying gemstones
and a document certifying and verifying gemstones. The method comprises the steps of …
and a document certifying and verifying gemstones. The method comprises the steps of …
System and method of unique identifying a gemstone
Y Navot, O Spirman, O Shilon, A Kerner… - US Patent …, 2019 - Google Patents
There is provided a computerized system and method of generating a unique identification
associated with a gemstone, usable for unique identification of the gemstone. The method …
associated with a gemstone, usable for unique identification of the gemstone. The method …
Apparatus and method for fluorescence grading of gemstones
H Takahashi - US Patent 10,890,531, 2021 - Google Patents
Provided herein is an apparatus for assessing a fluorescence characteristic of a gemstone.
The apparatus comprises an optically opaque platform for supporting a gemstone to be …
The apparatus comprises an optically opaque platform for supporting a gemstone to be …
Method for compensating data, compensating apparatus for performing the method and display apparatus having the compensating apparatus
KIM Yun-Jae, BJ Lee, BR Kim, SH Moon… - US Patent App. 13 …, 2012 - Google Patents
(57) ABSTRACT A method of compensating data includes: generating color correction data
of primary image data using a plurality of three-dimensional look-up tables in response to …
of primary image data using a plurality of three-dimensional look-up tables in response to …
Ultraviolet-visible absorption spectroscopy for gemstone identification
H Takahashi, PN Perera - US Patent 11,828,703, 2023 - Google Patents
US11828703B2 - Ultraviolet-visible absorption spectroscopy for gemstone identification -
Google Patents US11828703B2 - Ultraviolet-visible absorption spectroscopy for gemstone …
Google Patents US11828703B2 - Ultraviolet-visible absorption spectroscopy for gemstone …
IDENTIFICATION OF CHRYSOTILE IN BRAKE PADS AND LININGS FROM MALAYSIAN VEHICLES AND HEAVY VEHICLES BY USING POLARIZED LIGHT …
Exposure to types of asbestos such as chrysotile and crocidolite increases respiratory
disease risks such as lung cancer, mesothelioma, and asbestosis. Nevertheless, asbestos …
disease risks such as lung cancer, mesothelioma, and asbestosis. Nevertheless, asbestos …
Fluorescence imaging of gemstone on transparent stage
Abstract Systems and methods here may be used for a setup of fluorescence image
capturing of a gemstone, such as a diamond placed on a flat stage. Some examples utilize a …
capturing of a gemstone, such as a diamond placed on a flat stage. Some examples utilize a …