Design and Realization of Reading Recognition System for Sound Level Meter

Author

Qingsheng, Sun ; Xuejing, Wang ; Bo, Zhong ; Haijiang, Zhu

Author_Institution

Sch. of Inf. Sci. & Technol., Beijing Univ. of Chem. Technol., Beijing, China

Volume

1

fYear

2011

fDate

6-7 Jan. 2011

Firstpage

901

Lastpage

905

Abstract

This paper presents the necessity of reading recognition in calibration process of sound level meter, and analysis the problems of existing display reading algorithm, then presents a novel reading recognition system for sound level meter. The system find the position of number string by image difference and connective region analysis, and pre-process the image by local thresholding based on neighborhood averaging method, then recognizes the number by pattern grid and template matching. The system has the characteristics of rapid and accurate. The experiment shows the system is well competent for calibration work of sound level meter.

Keywords

acoustic devices; acoustic variables measurement; calibration; optical character recognition; calibration process; connective region analysis; display reading algorithm; image difference; neighborhood averaging method; pattern grid; reading recognition system; sound level meter; template matching; Calibration; Cameras; Gray-scale; Image recognition; Noise reduction; Pattern matching; image difference; pattern matching; reading recognition; thresholding;

fLanguage

English

Publisher

ieee

Conference_Titel

Measuring Technology and Mechatronics Automation (ICMTMA), 2011 Third International Conference on

Conference_Location

Shangshai

Print_ISBN

978-1-4244-9010-3

Type

conf

DOI

10.1109/ICMTMA.2011.226

Filename

5720929