AN EXPLORATORY AND THE DEVELOPMENT OF RUBBER PECTRAL LIBRARY FOR DIFFERENT RUBBER CLONE

Mohd Hafiz Mohd Hazir, Tuan Mohamad Tuan Muda

Abstract

This paper presented preliminary results of fundamental study to understand rubber leaf, seed, bark and root spectral behavior based on different rubber clones and maturity stages. Generally, the different rubber clones will have specific shapes of rubber leaf, seed, bark and root. Each clone also has specialty to grow in specific soil, topography, disease resistance and environment conditions. These shows whether different rubber leaves physical characteristics will have influence on rubber leaf, seed, bark and root spectral properties. The purpose of this study is to collect 20 samples reflectance value from each of four different rubber clones that covered the band width of 400 nm to 1000 nm. This data then can be transformed into valuable information to develop a spectral library that keeps previous, new and future rubber clone spectral signature information. Later it could be used by researchers as a technical guideline and reference in any related rubber leaf, seed, bark and root spectral research or product development. It also broadens research opportunities in geospatial application and encourages more new findings from this field. The implementation of a spectral library is crucial and varies on applications. The accuracy of the processing is much depending on the feature extraction techniques of hyperspectral data used. The result shows that near infra-red band width and above had potential value to segregate rubber clones.

Keywords: rubber clone; spectral library; reflectance

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