Abstract: A label comprising: a plurality of randomly positioned irregularly shaped three dimensional structures of unique structure parameters; and a plurality of structure parameter indicators each placed on top of one of the plurality of irregularly shaped three dimensional structures; wherein each structure parameter indicator facilitates a calculation of at least one structure parameter of the respective irregularly shaped three dimensional structure when a single two dimensional image of the label is processed.

Abstract: A system for collecting (or exchanging) product information includes: a registering device (1), and a label reader (42). The registering device (1) is adapted for entering a visitor ID; the label reader (42) has a label reader ID, and includes a reading unit for reading label information from a label associated with a product, so as to acquire product information form related to the product; wherein the label reader ID corresponds to the visitor ID.