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比值增强(文中简称波段比)方法,是处理卫星多波段影象常用的方法。本文以广东省6个县的地面资料为依据,对波段比选择、组合以及机制进行了研究。一、资料与设备本项研究,主要采用卫星影象上的密度值来进行。卫星影象为美国Landsat-2,1979年10月所摄,比例尺为1:100万的透明正片。密度值测定采用国产风光牌CM-T/F型透(反)射型密度计,激光成孔,直径0.2毫米,在1:100万比例尺下,相当于地面面积3.14公顷,大约包含6个象元。
Ratio enhancement (hereinafter referred to as the band ratio) method is commonly used method for processing satellite multi-band images. Based on the ground data of six counties in Guangdong Province, this paper studies the band selection, combination and mechanism. I. Data and Equipment This study mainly uses the density values of satellite images. The satellite imagery was a transliteration of 1: 1 million footage taken by the United States Landsat-2 in October 1979. The density was measured using a domestic landscape CM-T / F permeable (inverse) densitometer. The laser bore was 0.2 mm in diameter. At a scale of 1: 1 million, it corresponded to a surface area of 3.14 hectares and contained approximately 6 images yuan.