| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a mark card reader capable of preventing erroneous recognition caused by the stain of a scanner of a reading part, the ink friction of a mark card, dust, or the like. <P>SOLUTION: A recognition calculation including the density information of right and left areas of an input frame recognized as a mark "existence" and of an area of the input frame to be determined is executed, mark propriety is checked according to whether or not to be a fixed ratio, In the case of the fixed ratio, mark "existence" is correctly recognized, and if there is no fixed ratio, "absence" is recognized on the ground that there might be stain due to dust or the like. <P>COPYRIGHT: (C)2007,JPO&INPIT |
