An organic electroluminescence device having an anode structure on the lower surface which is effective for taking out light efficiently from the cathode on the upper surface in which the organic electroluminescence device comprises an anode, a cathode and an organic layer put between both of them. Pores are filled with an epoxy resin. The present system retrieves the data andor index pages of the set before executing the database request according to the access plan. The system relies on matching visual features from training images to match against features extracted from images taken at the checkout lane.