Research on crop and weed identification by NIR spectroscopy

Jiazhi Pan; Yueming Tang; Yong He

doi:10.1117/12.725951

29 January 2007 Research on crop and weed identification by NIR spectroscopy

Jiazhi Pan, Yueming Tang, Yong He

Proceedings Volume 6279, 27th International Congress on High-Speed Photography and Photonics; 62797D (2007) https://doi.org/10.1117/12.725951
Event: 27th International congress on High-Speed Photography and Photonics, 2006, Xi'an, China

Abstract

Crop and weed identification is very importance in precision farming field. As spectroscopy can reflects the contents of object tested, so it is possible to identify crop and weed with high correct rate. ASD FieldSpec recorded the spectrum of crops and weeds. Its waveband is 325-1075nm and with resolution of 3.5nm. One crop seedling and three kinds of weeds living together were tested. Each species has at least 30 sampling spectrum taken down. As one sample spectrum has too much data, wavelet transform reduced the data volume firstly, which compressed source signals to tens of floating numbers from 751 floating numbers. Totally 160 samples were used to build a radial basis function neural network, the object output was a 4 by 1 dimension vector. Those left 43 samples used to check the identifying capability. As neural network model has huge power in solving these pattern recognition problems. It can approach to giving finite function at any approximation. Nearly all these predicting samples classified right. Therefore, by using spectroscopy in the identification is possible, and having high correct rate. Further more, the computation is very fast. Whereas the spectrometer is expensive and easily affected by shaking and variation of light shine, it cannot installed directly on vehicles at present time. In the future, it may be possible to recognize crop and weed in real time by using spectroscopy.

Citation Download Citation

Jiazhi Pan, Yueming Tang, and Yong He "Research on crop and weed identification by NIR spectroscopy", Proc. SPIE 6279, 27th International Congress on High-Speed Photography and Photonics, 62797D (29 January 2007); https://doi.org/10.1117/12.725951

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available