摘要
此项研究是国家科技攻关项目。在研究此课题以前,世界上采用的多光谱航空摄影机一直是小像幅的(大部分为6cmx6cm,代称为6MSP)。6MSP不能测图,分光“有害吸收”大,故图像质量差,且像幅小,飞行和后期加工量极大。本研究采用18cm×l8cm和23cm×23cm像幅航空摄影测量像机组成多光谱像机组,并设计了“截止滤光镜一特制感光胶片”组合的无“有害吸收”的分光系统,使本多光谱航空摄影像幅比6MSP加大了9倍和14.7倍,并能“一摄多用”,既能测图,又能进行资源调查和环境监测,其图像因无“有害吸收”,分光质量高,可供目视判读,也可输入计算机进行准确地物分类解译。18-23MSP是一项有效的航空遥感技术。
Prior to theresearch project, the multi-spectral photographic cameras used in the world have a small format (mostly 6cm ×6cm, so it is called 6MSP), the 6 MSP could not be used for mapping; the 'harmful absorption' of spectral photometry is great so that the image quality is not up to standard; Due to the small format, the processing work is great during flying and later period. This project uses aerial photogrammetric cameras of format 18cm × 18cm and 23 ×23cm which composed multi-spectral camera groups, and the spectral photometry which has no 'harmful absorption' is constituted by 'cut-off filter and special sensitive film' that enables the format of the multi-spectral aerial photography to increase by 9 times and 14.7 times more than 6MSP, and it allows'one photography-multiple usage', e.g the photographs can be used for mapping and for resources investigation and environment monitoring. As there is no 'harmful absorption' so the quality of multi-spectral image is higher, and can be used for visual interpretation and also can be input into compcter in order to do the objects classification and interpretation accurately. 18-23MSP is an efficient aerial remote sensing techniques.
出处
《环境遥感》
CSCD
1991年第4期291-295,共5页
关键词
测图
多光谱
航空摄影
Multi-spectral aerial photograpsy Image quality mapping Resources investigation
