共查询到19条相似文献，搜索用时 609 毫秒
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自稳定双拼相机影像拼接技术 总被引：3，自引：0，他引：3
介绍自稳定航测双拼数码相机,并详细论述其影像拼接的关键技术,主要包括相机检校、影像水平纠正、子影像间相对定向和虚拟影像拼接,最后对虚拟影像拼接误差进行分析。采用自稳定双拼相机进行低空摄影测量,能达到1:1 000大比例尺航测成图的精度要求。目前,该项技术已经成功应用于地形图测绘、三维建模、区域规划等实际工程项目中。 相似文献
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全数字摄影测量主要应用于生产数字地形图及数字地面高程模型（DEM）和数字正射影像图（DOM）。某市及周边地区1：l000地形图航测项目,利用DMC一110摄影仪进行摄影获取的影像数据,使用VirtuoZo数字摄影测量工作站,阐述进行航测内业绘制地形图的全面流程。DMC技术将发挥更大的优势,在数字摄影测量中得到越来越广泛的应用。 相似文献
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根据内视场拼接相机的构像原理,提出了一种单镜头多面阵CCD相机影像拼接处理的基本流程和方法。该方法涵盖了成像过程的影响,包括子影像相对位置自动确定、等效焦面影像拼合、数字像差检测和无畸变中心投影影像生成等技术环节。特别是建立了内视场拼接型数字航测相机几何特性描述模型,在包含了传统航测相机像差所顾及的焦距、主点坐标和物镜光学畸变等要素的基础上,扩展考虑了多面阵CCD不平行性误差和安装误差两项影响。试验结果表明,影像量测精度从1.5像元提高到0.3像元,系统误差降低了78%,验证了相关技术方法的有效性。 相似文献
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非航测专业数字摄影测量教材问题研究 总被引：2，自引：0，他引：2
随着数字摄影测量的发展,众多行业和相关学科不断向摄影测量与遥感专业渗透,出现了非航测专业数字摄影测量教学问题,其中教材问题已经逐渐成为制约非航测专业数字摄影测量教学发展的障碍。针对非航测专业数字摄影测量教材问题进行研究。 相似文献
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随着面阵数字航测相机在航空摄影领域的广泛使用,其参数校准成为亟待解决的关键问题。本文首先阐述了精密测角法的校准原理,在此基础上设计了基于大口径长焦距平行光管、精密测角转台和亚像素目标定位算法的面阵数字航测相机校准装置;其次通过对装置的误差分析,证明了该装置精度满足测绘行业标准中对数字航测相机的校准精度的要求;最后验证了该装置对面阵数字航测相机的实验室校准是可行的。 相似文献
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The Z/I Imaging Digital Camera System 总被引：1，自引：0，他引：1
Market needs for airborne and spaceborne imagery used in photogrammetry and GIS applications are changing. Fundamental changes in sensors, platforms and applications are currently taking place. Most recently, new high resolution spaceborne sensors have become available. Besides classical photogrammetry, new thematic applications will drive the future image market. Savings in cost and time, together with the need for higher and reproducible radiometric resolution or spectral information will push forward the change from analogue to digital imagery. High resolution satellites will compete with airborne film-based photography and digital camera systems.
With the availability of a digital airborne camera, it is possible to completely close the digital chain from image acquisition to exploitation and data distribution. The key decision regarding the camera design in this case is whether a linear or area array sensor should be used. In view of the high geometric accuracy requirements in photogrammetry, Z/I Imaging has focused development on a digital camera based on an area sensor. An essential aspect of this decision was not only the aerial camera system, but also the entire photogrammetric process to the finished photographic or mapping product. If this point of view is adopted, it becomes clear that the development of a digital camera involves more than simply exchanging film for silicon. Aspects such as data transfer rates, in-flight data processing and storage, image archiving, georeferencing, colour fusion, calibration and preprocessing have the same influence on the economic assessment of a digital camera system. This paper describes current development activities and application aspects of a digital modular airborne camera system. 相似文献
With the availability of a digital airborne camera, it is possible to completely close the digital chain from image acquisition to exploitation and data distribution. The key decision regarding the camera design in this case is whether a linear or area array sensor should be used. In view of the high geometric accuracy requirements in photogrammetry, Z/I Imaging has focused development on a digital camera based on an area sensor. An essential aspect of this decision was not only the aerial camera system, but also the entire photogrammetric process to the finished photographic or mapping product. If this point of view is adopted, it becomes clear that the development of a digital camera involves more than simply exchanging film for silicon. Aspects such as data transfer rates, in-flight data processing and storage, image archiving, georeferencing, colour fusion, calibration and preprocessing have the same influence on the economic assessment of a digital camera system. This paper describes current development activities and application aspects of a digital modular airborne camera system. 相似文献
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Three-dimensional (3D) reconstruction and texture mapping of buildings or other man-made objects are key aspects for 3D city landscapes. An effective coarse-to-fine approach for 3D building model generation and texture mapping based on digital photogrammetric techniques is proposed. Three video image sequences, two oblique views of building walls and one vertical view of building roofs, acquired by a digital video camera mounted on a helicopter, are used as input images. Lidar data and a coarse two-dimensional (2D) digital vector map used for car navigation are also used as information sources. Automatic aerial triangulation (AAT) suitable for a high overlap image sequence is used to give initial values of camera parameters of each image. To obtain accurate image lines, the correspondence between outlines of the building and their line features in the image sequences is determined with a coarse-to-fine strategy. A hybrid point/line bundle adjustment is used to ensure the stability and accuracy of reconstruction. Reconstructed buildings with fine textures superimposed on a digital elevation model (DEM) and ortho-image are realistically visualised. Experimental results show that the proposed approach of 3D city model generation has a promising future in many applications. 相似文献
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通过分析航空摄影测量规范和像点位移误差对航测成图精度的影响,认为造成这一问题的主要原因是我国航空摄影测量规范没有对像点位移误差做出相应的合理限制,而由像点位移误差导致的。 相似文献
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研究非量测CCD数码相机应用于航空摄影测量的技术方法.采用基于自检校光束法平差严格标定非量测CCD数码相机;提出基于相对定向、三视张量、自由光束法平差、区域网光束法平差的空中三角测量流程.实验表明,严格标定的数码相机,可以应用于大比例尺航空摄影测量. 相似文献
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连镇华 《测绘与空间地理信息》2011,34(1):188-191
总结在晋江市1:500航测成图项目中数码影像、像片控制测量、外业调绘与补测等方面应用的新技术、新工艺,对基于数码影像结合全数字航空摄影测量系统生产1:500地形图的精度进行佑算和验证,提出该技术的发展展望. 相似文献