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《Journal of Beijing Forestry University》 2007-S2
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Method and practice of reading the gray values of relative compartment area on the remote sensing image.

HAO Xing-yao;FENG Zhong-ke;TONG Hui-jie.Institute of GIS,RS & GPS,Beijing Forestry University,100083,P.R.China.  
To provide credible data for empirical model,a method of calculating the weighted average gray value of compartment area was designed in this paper.It worked especially when the compartment area was as large as pixel.The GeoTIFF form was adopted as the RS data type.The Matlab software was used to read and store RS image.The pixel was divided into smaller units to calculate the area of spackle in each pixel by counting the amount of the units.In the example,inputting the TM RS image and a set of coordinates,then the average gray value of the compartment area was output.The result is much more credible comparing with the result taken out when the compartment area is substituted by a single point.
【Fund】: 国家自然科学基金项目(90302014)
【CateGory Index】: S757.2
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