最新刊期
卷 ， 期 3 ， 1987
- 摘要：In this paper, we based on the first practice of using China’s satellite photograph, expound the aim and significance of using the satellite photographs to search for natural resources in parts of Yellow River Delta, the selection of the experimental area, properties of the images and the whole process of the experiment. It is the first time to use China’s satellite photographs in the construction of the national economy and to compile themacie maps, so it is very important to put forward in this paper the method of image treatment, the principles and procedure of cartography interpretation, as well as the synthetical appraisal of the whole experiment.
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发布时间：2021-06-10 - 摘要：The paper deals with the first trial classification of uncovered peat-swamp land in China by using landsat images （MSS. 140-37, imaged on October 4th, 1975; MSS. 141-37, imaged on July 14th, 1977）. Having processed optically and by computer and visually interpreted the images, the writer proposed a scheme for the classification of images of uncovered peat-swamp land in Ruoergai PLateau, Sichuan Province, then analysed the imagery, geomorphic, vegetational and thickness features as well as their relationships in different peat-swamp lands. Spectrum of ground objects was measured and the classification of images was tested in field.The classification defined relatively accurately the scope of the peat land. Simultaneously, the peat resources are divided in the area.
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发布时间：2021-06-10 - 摘要：This paper studied the gray level dependence （GLD） texture analysis approach in both theory and application. GLD feature extraction was viewed as filtering of weight matrices on GLD matrices. The relation between image teyture and GLD matrices, and the influence of the shape of weight matrices on GLD features were discussed. Understanding of sensitivity and stability of GLD features has been improved. Selection of GLD parameters were studied in detail. Eight GLD features were evaluated in their performance and applications.
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发布时间：2021-06-10 - 摘要：This paper presents a new exact method for the detection of edges in digital grey level imagery. This method performs expanding and compressing algorithms on the binary graph of classification of the original image in order to delete the additive white Gaussian noise and other disturbances, and to extract a coarse boundary of object. Then, within the neighborhood of this boundary, we trace the edge pixels based on an isotropic gradient operator and orientation information. Furthermore, we estimate the object’s proportion of each edge pixel, using a local optimal proportion estimation operator （so called subpixels segmentation）. Combining the proportion values and forword orientation of edge, we compute intersections of boundary curve and each edge pixel. After geometric correction of all intersections, we output the smooth curve of object edge and its area, using automatic computer graphic techniques. Finally, through experimental analysis of analog data and actual image data by using above process, we show that this method provides us an optically better edge than any others which output an edge by taking pixel as a unit, that it also gives us a more accurate position of boundary and area of object. This has a quite significance for combining automatic graph techniques with image process techniques, automatic mapping of remote sensing data, large scale mapping of low resolution data image, and for application fields which demand sub-pixel accuracy area survey of objects.
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发布时间：2021-06-10 - 摘要：The use of Landsat false color composite image is widespread in our country. But the band composite and exposure ratio of, three base color is controlled by experience with some blindness.In this paper a project of false culor composite is proposed. This project can enhance the-diresolving targets on image in forms of different colors more easily, quickly and accurately.The chromatic coordinates and brightness values on the composite screen can be calculated in concrete value. It in creases the interpretation accuracy and provides data for computer-assisted cartography.This paper deals with the basic principle, calculating formula and projecting steps gives examples for project and analyze the display effect of information in our project.
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发布时间：2021-06-10 - 摘要：Based on the reseach of the physical mechanism of aerial color infrared photography, this paper reveals the linear relation between the exponential transform of spectral density of the image and the ratio of spectral reflectance of the ground object. A practical statistical method and corresponding experiment to reverse the ground object spectra by aerial color infrared film were given. It is shown that at least 6-band ground object spectra can be reversed by the aerial color infrared film HCJ-2 made In China. Moreover, because this statistical method has usefull, thoroughgoing and highly effective characteristics, it makes the possible to reverse all the image of aerial films by computer.
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发布时间：2021-06-10 - 摘要：The method of diffraction pattern analysis has been widely applied to pattern recognition. In this paper an approach of aerial photo recognition by use of optical power spectrum analysis system is introduced. The method of how to compress the scene feature space, how to extract the feature from remote sensing photogrhphy and how to design the classifier are discussed. Finally the experimental results are given, some advantages and defects of the method are discussed. too.
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发布时间：2021-06-10 - 摘要：The research of the radiowave propagation of microwave in remote sening is mainly on the rules of space distribution and time variance of the brightness temperature and scattering coefficient of the ground objects, and the correlation of the property of the ground objects with the propagation parameters is set up. For the past five years, through reasonable selecting of the number of independent samples by using X-band scatterometer system, we have made the precision of the measurement below 2db. The data of the typical ground objects, which are characteristic of the Chinese topographic features, are extensively collected. These ground objects include waters, roads and airfields with the smooth surface; the farmland, sands and seawave with the rough surface; wheat, rice, grassland and woods with the random surface in the mixed medium; houses, rock and hills with the complex mixed surface. The analysis has some to the important quantitative correlation on the base of experimental results. The research on the relation of the scattering coefficient with the soil moisture and its roughness has been made, and the valuable conclusion has been reached. At the same time, the scattering coefficient and its power spectral density are resolved by using the analysis method about the electromagnetic scattering theory, and these have been compared with the measurement results significantly.
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发布时间：2021-06-10 - 摘要：<正> 在我国,目前除了自己研制的很多遥感专用设备外,还从国外引进了几十部不同类型的遥感图像光学处理设备,AC-90B光学处理设备就是其中之一。为了更好地发挥AC-90B装置的作用,我们曾对它做过一些改进。下面就这些改进及其应用效果作一简单介绍。
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发布时间：2021-06-10 - 摘要：<正> 1987年5月7日大兴安岭林区火灾发生后,中国科学院遥感卫星地面站,为了密切监测火情,为灭火领导小组的指挥与决策提供准确的有价值的资料,立即与美国陆地卫星控制中心联系,除白天正常接收外并要求增发13日、20日、22日等夜间经过该地区上空的热红外探测数据。5月13日该站首次成功地接收并处理出火灾发生后第一次经过该地区的数据,获得了东西两个火区的形势与位置分布图、火头的准确座标及火区的等密度分割图,有力地配合了救灾指挥的工作。
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发布时间：2021-06-10 - 摘要：<正> 中国林学会第三次林业遥感学术讨论会1987年4月16日至20日在西安召开。林业系统和16个非林业系统的科研、教育、生产部门的近70名代表应邀参加。会议收到论文52篇,包括航空像片应用、多种遥感资料复合应用、数字图像处理、光机结合应用和测绘成图等方面。会议采取大会学术报告和小组讨论交叉的方式进行,把学术报告、经验交
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发布时间：2021-06-10
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