Subject: How Isee2 Scores are Generated D Riley Join date: 18/05/2004 Posted: 18/05/2004  20:34:00 Posts: 2 How are Isee2 scores generated? Is it through pixel counting as with the Brilliance Scope or through direct measurement of some quantity? You label two of the three quantities measured as "brilliance" and "scintillation". Since the industry is currently grappling with measuring these quantities, how are you defining them? Do your definitions agree with those of the major labs? Do you view the Isee2 machine as a sales aid or a cut-grading tool? To what degree do you see Isee2 scores correlating with current cut research from the major labs? chris Join date: 18/05/2004 Posted: 27/05/2004  06:41:00 Posts: 2 Dear Mr. Riley, The scores are calculated using the digital images of the stone while the lighting is varied. For an explanation on brilliance and scintillation please follow these steps through the isee2 web site: - On http://www.isee2.com/ select “Technology” - underneath the image showing the devices, click the loupe or the text “Discover the Isee2 interface as if in your Isee2 jeweler’s store” - click the icon called “Isee2 simulation” The Isee2 is a buying experience offered to the consumer, based on a technology providing the consumer with the ability to assess for themselves the beauty performance of a diamond. Based on correct technical data, correlating with current cut research, the Isee2 has been a revolutionary product helping the consumer discover the beauty of a stone. The Isee2 is a conveyer of confidence and a quality labeled diamond. Both GIA and AGS (and others) are working on new cut grading systems which will essentially be performance based, as Isee2 has always been. Isee2 will correlate well with their results. Best regards, the Isee2 team D Riley Join date: 18/05/2004 Posted: 30/07/2004  10:29:00 Posts: 2 Thank you for your reply. From your post, it sounds as if each pixel is given a weight rather than classified as being "on" or "off". This seems very reasonable. I'm also happy to see that you are using difuse lighting when trying to measure brilliance. This seems more sensible than the approaches some others have used. I imagine you are (understandably) unwilling to go into detail about exactly how you arrive at your measures. You do have to protect your design. I would not be fully convinced of the correctness of these measures without knowing exactly how they are determined, but I do think what you have said is encouraging. Thank you for your time. chris Join date: 18/05/2004 Posted: 28/05/2004  23:27:00 Posts: 2 Dear Mr Riley, For the computation of the brilliance parameter we measure light return, for which we use the intensity values of all the image pixels on the stone’s surface. The lighting environment is patented but is designed to generate an environment and pattern suitable for measuring brilliance, scintillation and symmetry. It also takes into account "head obstruction". The light source the stone "sees" is diffuse. Best regards, Chris