| 摘要 |
<P>PROBLEM TO BE SOLVED: To notify the fact to a user that the factor of a decoding failure is only that the distance to a reading object is slightly out of a readable range. <P>SOLUTION: A reading mechanism for reading an information code recorded in the reading object, a control device including a characteristic detection circuit or CPU, and the like are provided within a case 2 having a reading port 2a. Although the readable range A capable of performing satisfactory read (decode) of an information code is preliminarily determined depending on the optical characteristic of the reading mechanism, a characteristic pattern can be detected from fetched image data in neighboring areas B1 and B2 of the readable range A. When the decode of the information code is failed although the characteristic pattern of the information code is detected in the characteristic detection circuit, the control device (CPU) determines that the distance to the reading object is within either one of the neighboring areas B1 and B2, and announces the effect by ringing a buzzer in bass and lighting a display LED 6 in orange color. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
