Abstract: The pairing of members in the online community based on at least physical preferences and displaying to a person advertisements depicting people whom that specific person is attracted are provided. The invention can provide face similarity technology to match a member with people they will find attractive based on preference data from the user. For example, profiles of people who look similar to other people that the member has indicated to be attractive can be provided to the member. Additionally, using mutual attraction criteria, the invention can answer the age old ‘Does she/he even like me?’ question before users even sit down on the first date, thus enabling users to enjoy high quality and compatible dates knowing the feeling of attraction is mutual. The face similarity technology can also be used to provide advertisements depicting people that a person finds attractive.

Abstract: A computer or other digital circuitry is used to assist in the creation of a digital model of an individual component, such as a tooth or gum tissue, in a patient's dentition. The computer receives a data set that forms a three-dimensional (3D) representation of the patient's dentition, applies a test to the data set to identify data elements that represent portions of the individual component, and creates a digital model of the individual component based upon the identified data elements. Many implementations require the computer to identify data elements representing a 2D cross-section of the dentition lying in a 2D plane that is roughly parallel to or roughly perpendicular to the dentition's occlusal plane. The computer analyzes the 2D cross-section to identify dentition features that represent boundaries between individual dentition components.