Abstract: The current document is directed to methods and systems for identifying symbols corresponding to symbol images in a scanned-document image or other text-containing image, with the symbols corresponding to Chinese or Japanese characters, to Korean morpho-syllabic blocks, or to symbols of other languages that use a large number of symbols for writing and printing. In one implementation, the methods and systems to which the current document is directed create and store a decision tree, the nodes of which include classifiers that each recognizes the symbol that corresponds to a symbol image. Input of a symbol image to the decision tree and processing of the symbol image through one or more nodes of the decision tree returns a symbol corresponding to the symbol image.

Abstract: The current application is directed to a method and system for automatically determining the sense orientation of regions of scanned-document images. In one implementation, the sense-orientation method and system to which the current application is directed employs a relatively small set of orientation characters that occur frequently in printed text. In this implementation, for at least one set of orientation characters, each of two or more different orientations of character-containing subregions within a text-containing region of a scanned-document image are compared to each orientation character in the at least one set of orientation characters in order to determine an orientation for each of the character-containing subregions with respect to a reference orientation of the text-containing region. The determined orientations for the character-containing subregions are then used to determine an overall sense orientation for the text-containing region of the scanned-document image.

Abstract: The current document is directed to methods and systems for identifying symbols corresponding to symbol images in a scanned-document image or other text-containing image, with the symbols corresponding to Chinese or Japanese characters, to Korean morpho-syllabic blocks, or to symbols of other languages that use a large number of symbols for writing and printing. In one implementation, the methods and systems to which the current document is directed create and store a decision tree, the nodes of which include classifiers that each recognizes the symbol that corresponds to a symbol image. Input of a symbol image to the decision tree and processing of the symbol image through one or more nodes of the decision tree returns a symbol corresponding to the symbol image.