Gemological object recognition

Method (1300) to recognize a gemstone object by a gemstone object recognizing system (500) for an online certificate as based on measures of character of the gemstone object, the system comprising an imaging device such as camera and a moving assembly to move said imaging device of an imaging system and/or the gemstone object in respect to each other, to form a path around said gemstone object on an imaginary sphere, for creation of a virtual model comprising images of image stacks, the method comprising:

• predefining (1301) an imaginary sphere to comprise at least one path to the imaging locations of said imaging device such as camera,
• predefining (1302) an Φ-direction increment (ΔΦ) on said sphere surface for the movement path of the imaging device to follow the sphere surface in a first imaging plane,
• predefining (1303) an Θ-direction increment (ΔΘ) on said sphere surface for the movement of the imaging device to provide an effect as to follow a second path of the sphere surface in a second imaging plane,
• setting (1304) at least one starting position to said imaging device to start the imaging, wherein in addition the method comprises the following:
• collecting (1305) image and/or video data (Fr) (Stn(Θn,Φn)) about the gemstone object from an imaging location (n, (Θn,Φn)) into at least one image stack (Stn(Θn,Φn)) by an imaging device from an imaging location defined by the increments (ΔΘ), (ΔΦ) in Θ-direction and Φ-direction to follow at least one path of the imaginary sphere, by an ensemble of camera units of a camera (Camera) being enabled to set its focal planes (Foc1), (Foc2), (Foc3) in the gemstone object arranged to produce focal plane specific image stacks (Fr1(Θn,Φn),St1(Θn,Φn);
• Fr2(Θn,Φn),St2(Θn,Φn):
• Fr3(Θn,Φn), St3(Θn,Φm);
• Fr4(Θn,Φn),St4(Θn,Φn)) for each camera unit,
• storing (1306) the images (Fr) of at least one of said image stack (Stn(Θn,Φn)) corresponding the imaging location of the imaging device (n, (Θn,Φn)), for a virtual model of the gemstone object to be recognized,
• selecting (1307) a next imaging location (n+1, (Θn+ΔΘ,Φn+ΔΦ)) for the imaging device to collect a next at least one image stack (Stn+1(Θn+1,Φn+1)) corresponding an incremental change of at least one of the Θ-direction increment (ΔΘ) and the Φ-direction increment (ΔΦ),
• combing (1308) the images (Fr) from said at least one image stack with other images from said at least one image stack (St1(Θ1,Φ1)) and/or from another similar at least one image stack for the virtual model (ΣStn(Θn,Φn)) of the gemstone object to be recognized,
• wherein in the method, for the virtual model, for the on-line certificate formation, an authentication code is generated to at least one image stack (Stn) frame (Fr) according to an authentication scheme, to authenticate said frames (Fr1), (Fr2), (Fr3) to belong to the same gemstone object to be recognized in accordance of the measures of character,
• recognizing and recording (1309) measures of character (Cr, CoA, Sh, l, Bbl, Auth code) of said gemstone object to be recognized from at least one of said images (Fr) of an image stack (Stn),
• repeating (1310) image collection and selecting a next imaging location for the imaging device to collect a next at least one image stack (St1(Θ2,Φ2)) corresponding an incremental change of at least one of the Θ-direction increment (ΔΘ) and the Φ-direction increment (ΔΦ) until all the predefined (μP) imaging locations of the moving assembly (500) around said gemstone object to be recognized has been dealt,
• comparing (1311) the measures of character (Cr, CoA, Sh, l, Bbl, Auth code) to those in a database,
• giving (1312) an identity (ID) to said gemstone object to be recognized and to said virtual model of it (ID), if no similarity of compared measures of character found from said database,
• and wherein the method comprises making and giving a certification (Certificate) about the gemstone object to be recognized according to the identity (ID) being recognized based on its measures of character, in an electric form via an information network, the authentication tagging being check for the gemstone object via a secure channel.