Passive embedded interaction coding

摘要

An input unit receives an image from a document and a parser divides the image into sub-images. An encoder encodes the sub-images into a code, and a storage unit stores the code associated with a location of the sub-images in relation to the image. Independent claims are also included for the following: (1) system for creating codebook; (2) system for searching codebook; (3) method for encoding information from document image; and (4) method for creating codebook.