Abstract: A system and a method for automatic mail operation with four state barcode are provided. An automatic mail operation processing system with four state barcode in accordance with the present invention includes customer barcode supporting system, mail operation supporting system, and automatic sorting system. The customer barcode supporting system converts information into four state barcode and prints the barcode on mail and mail receiving form when a customer supplies the information. The information is necessary for shipping the mail. The mail operation supporting system receives the mail and the mail receiving form, determines postal fee, and reports result of receipt to the customer through the customer barcode supporting system. The automatic sorting system reads the four state barcode on the mail and sorts the mail automatically.

Abstract: This invention is related to a system and a method for reading high precision printed barcodes and their specification verification. The presented invention has a technique of reading both logistic sorting barcode (one or two dimension) and multi-layered structure barcode such as four-state barcode for automatic postal matter sorting. The invention also investigates height of high densely reduced barcodes in more than 3 steps, and precisely measures and reads the values of black bars thickness and white spaces. Previous techniques used laser beam for reading barcodes, but could not read barcodes, which have print density of less than 1/100 mm˜1/1,000 mm unit, and, it was also impossible to read precise specification values in case that barcode specification was composed of length unit indexes. The presented invention overcomes the previous said problems by using a laser diode array.

Abstract: There is disclosed a method of exactly delivering a mail item and a method of processing the mail item depending on the delivery result. Conventionally, if mail information to be delivered to a recipient is erroneously written, the mail item is automatically sorted based on the erroneous information. Also, if the recipient is unknown, the mail item is manually sorted to return it to the sender. Thus, this conventional method has problems that it requires a lot of time in processing the mail item. In order to overcome these problems, the present invention allows a mail customer to write correct mail information into his/her mail item upon printing of a customer barcode, notifies information on the delivery process to the mail customer, effectively returns a return mail item and notifies information on the processing state to the mail customer.

Abstract: This invention provides a method for searching the shortest path between two points in a geographics information system. In a postal route system and method for fast algorithm of the shortest path search with direction in the same according to the present invention, in order to serve an application service associated with the method for fast algorithm of the shortest path search, a map and an associated information are constituted by a database through which the process to generate the shortest path is performed so that it is possible to provide services utilized in such as postal delivery, transport information system and general road information guide which require the information on the shortest distance.