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| 航空摄影最佳曝光量的选择 | |
| 引用本文： | 吴祖义,孙和利. 航空摄影最佳曝光量的选择[J]. 武汉大学学报 ( 信息科学版),1988,13(2): 24-30. |
| 作者姓名： | 吴祖义 孙和利 |
| 摘 要： | 分解力是评定影象质量的重要指标。本文介绍利用改进后的国产9 w测微密度仪,测定航空软片静态分解力与曝光量的关系。以最大分解力所相应的曝光量作为确定航摄软片感光度的基准,以此为基础,确定航摄底片的最大密度( D max )、最小密度( D min )、影象反差(△ D )和平均密度( D R )本文对国产1022T、1022P、柯达2402、2412等航摄软片进行了研究,其试验结果可作为今后修改航摄规范的基础。 |
| 关 键 词： | 影象质量 微观特性 静态分解力 分解力特征曲线 航空摄影曝光量 |
| 收稿时间： | 1987-10-01 |
The Selection of Optimum Exposure in Aerial Photography |
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| Wu Zuyi,Sun Heli. The Selection of Optimum Exposure in Aerial Photography[J]. Geomatics and Information Science of Wuhan University ,1988,13(2): 24-30. | |
| Authors: | Wu Zuyi Sun Heli |
| Affiliation: | Wu Zuyi Sun Heli |
| Abstract: | Resolution is the main standard in evaluating image quality. The determination of the relationship between statical resolution of aerial film and exposure by improved Chinese-built 9 w microdensitometer was introduced in this paper. The expiate corresponding to maximum resolution is the criterion for determinating aerial film speed,therefrom the maximum density ( D max ),minimum density ( D min ),image contrast(Δ D ) and average density ( D R ) could be determined on the basis of optimum resolution. Four kintis of aerial film including Chinese-built 1022T,1022P and Kodak 2402,2412 were investigated. The results shown in this pager could be consindered as foundation in modifing specification in aerial photography. |
| Keywords: | image quality micro structure statical resolution characteristic curve of resolution exposure in aerial photography |
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