Title :
Research on measurement algorithm of digital level
Author :
Geng, Liqing ; Shao, Shanfeng
Author_Institution :
Tianjin Key Lab. of Inf. Sensing & Intell. Control, Tianjin Univ. of Technol. & Educ., Tianjin, China
Abstract :
Aiming at reading data automatically with digital level, the localization principles of reading data automatically with digital level based on double sinusoidal code ruler are studied. Firstly, The edge position of bar code on ruler is detected with wavelet transform. Secondly, The phase difference of double sinusoidal code is calculated with Short-Time Fourier Transform (STFT). Finally, Based on the one to one corresponding relationship of the phase difference and the position on ruler, the line of sight height is obtained. The experiment results indicate that the measurement algorithm is feasible.
Keywords :
Fourier transforms; bar codes; digital instrumentation; edge detection; measurement systems; position measurement; wavelet transforms; STFT; automatic data reading; bar code; digital level measurement algorithm; double sinusoidal code ruler; edge detection; phase difference calculation; short-time Fourier transform; wavelet transform; Charge coupled devices; Image edge detection; Signal processing algorithms; Signal resolution; Time frequency analysis; Wavelet transforms; Short-Time Fourier Transform; digital level; phase difference; wavelet transform;
Conference_Titel :
Image and Signal Processing (CISP), 2010 3rd International Congress on
Conference_Location :
Yantai
Print_ISBN :
978-1-4244-6513-2
DOI :
10.1109/CISP.2010.5647430
