| 摘要 |
PROBLEM TO BE SOLVED: To provide a data identifying device which can suppress incorrect data identification. SOLUTION: The device reads an image formed on a paper based on predetermined image data, and discriminates the data of which a block takes charge. The image data are constituted by dividing an image region into a plurality of blocks, further dividing each block into a plurality of regions, and increasing or decreasing the pixel value of each region and each block with an increasing and decreasing value assigned by region in the block by a pattern, defined beforehand according to data in charge of the block. It is determined that a sum of decreasing values in a block is set to 0. The decreasing value of a region r is inferred, by acquiring sums of pixel values Q1, Q2, Q8 of 3 blocks B1, B2, B8 adjoining the region r1, obtaining the total Q1+Q2+Q8, and subtracting the value of the multiplied value of the total by a predetermined value A, from a total Rr of pixel values in the region r1. Executing the presumption for each region of the all blocks, data of each block are inferred from the decreasing value of each region. COPYRIGHT: (C)2007,JPO&INPIT
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