Patent ID: 6798905
Filing Date: 2004-09-28
Classification: G06K

Abstract:
A document orientation recognizing device which recognizes an orientation of an image of a document in accordance with a set of image data of the document, comprising:a dividing unit which divides the set of image data into a plurality of data blocks, each data block corresponding to a different area obtained by dividing the image of the document; a reliability calculating unit which calculates a reliability for each data block for a case where a set of image data of the data block is used in an orientation recognition of the image of the document; a selecting unit which selects at least one data block whose reliability is higher than other data blocks in accordance with the reliability calculated for each data block by the reliability calculating unit; and a recognizing unit which recognizes the orientation of the image of the document in accordance with each set of image data of the at least one data block selected by the selecting unit, wherein the reliability calculating unit generates a histogram for each data block from the set of image data of the data block and calculates the reliability for each data block in accordance with a difference between a maximum value and a minimum value of the histogram.