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笔者等在用机载红外扫描仪对岩溶地质、岩溶水文地质进行研究时,发现热红外扫描图象对柑桔园的病虫害也有良好的显示。现将获得的图象及所作的初步分析报道如下。图象本文所提供的图象系桂林市东南郊穿山公社的柑桔园。图1(a)为该地区的可见光航空摄影片,柑桔树在该片中的轮廓清晰可辨。图1(b)为同一比例尺的凌晨热红外扫描图象,图象获得的时间为1980年9月27日5时27分至5时34分。柑桔园所在区间的热红外扫描图象灰度特征可以明显地划分为三种不同的灰度等级:灰白、灰、灰黑。通过现
When I was studying the karst geology and karst hydrogeology with the airborne infrared scanner, I found that the thermal infrared image also showed a good indication of the diseases and pests of citrus orchard. The images obtained and the preliminary analysis made are reported below. Image The images provided in this article are citrus orchards of the Chorisan Commune in the southeast suburbs of Guilin. Figure 1 (a) is a visible aerial photographic film of the area where the citrus tree has a clearly defined contour. Figure 1 (b) shows an early morning thermal infrared image of the same scale, obtained from 27:27, September 27, 1980 to 5:34, 1980. Grayscale features of the thermal IR image in the citrus orchard can be clearly divided into three different grayscale levels: gray, gray and gray-black. Through now