基于图像的绝对位置编码器编解码算法研究.pdf

389 Vol. 50 No. 3
总第 ， ' ， ' ）
As the shortcomings of traditional optical encoders such as complicated encoding and decoding low accuracy
Abstract ， ， ，
short measurable distance and contaminated or damaged barcode are not easy to identify. This paper proposes a new method of abso⁃
，
lute linear position coding decoding and detecting and it introduces the construction principle of absolute position barcode based
， ，
on m sequence and code element encoding method. The global phase information of barcode scale image is used to locate the bar⁃
code position to decode barcode scale image by code element duty cycle combining with digital image processing technology and
， ， ，
to use the cross-correlation operation of m sequence to calculate absolute position information. The result of Matlab simulation show
that barcode image coding method is simple barcode recognizing accurately and has high measurement accuracy insensitive to