Embedded digital identification method for gas meter housing type shooting

Abstract

The invention discloses an embedded digital identification method for gas meter housing type shooting. The method is characterized in that the method can realize small memory occupation, fast calculation and high robustness, and is directly realized in an embedded system. The method comprises a close-shot code meter dial image preprocessing module, a code word character feature extraction module and a code word character recognition module. (1)The close-shot code meter dial image preprocessing module is characterized by, to begin with, carrying out pretreatment on an original image and carrying out segmentation on code word characters, and then, carrying out integrity detection on the segmented code words; (2) the code word character feature extraction module is characterized by providingan improved algorithm for extracting complete character features based on character threading features and extracting half-code character features based on 16 grid features; and (3) the code word character recognition module is characterized by providing an improved PSO-SVM parameter optimization classification algorithm, thereby improving recognition accuracy of the whole codeword characters. High recognition accuracy and stability of function and pressure test of million-level data show that the method has good stability and feasibility.

Description

technical field [0001] The invention belongs to the field of natural gas metering, and in particular relates to an embedded digital recognition method for gas meter housing-type cameras. Background technique [0002] 1. Since the 21st century, the penetration rate of gas in cities has been increasing year by year. By 2009, the penetration rate of gas in cities had reached 91.4%. According to the "National Twelfth Five-Year Plan for Urban Gas Development", by the end of the Twelfth Five-Year Plan, the number of gas users in my country will increase sharply. It is estimated that more than 65% of users in small counties and towns will use gas, and the urban gas penetration rate is expected to be 94%. The number of gas users reached 200 million. [0003] 2. In recent years, the gas meters manufactured in the factory include electronic type, IC card type and other models. The metering boxes are basically membrane type, that is, digital wheel code meters. The basic principle is th...

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Problems solved by technology

[0003] 2. In recent years, the gas meters manufactured in the factory include electronic type, IC card type and other models. The metering boxes are basically membrane type, that is, digital wheel type code meter. The basic principle is the same, but the functions of display, storage and meter reading information are different.

The traditional manual meter reading method has disadvantages such as difficulty in entering the household and poor meter installation environment, and the problems of missed reading, under-reading, and missed collection are serious

Manual meter reading is not only inefficient, but also misreading due to fatigue of employees occurs from time to time

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