期刊名称：ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences
印刷版ISSN：2194-9042
电子版ISSN：2194-9050
出版年度：2004
卷号：XXXV Part B5
页码：183-188
出版社：Copernicus Publications
摘要：A digital photo image can be considered, with a good approximation, as a central perspective of the acquired object. If the internal and external orientation parameters of the camera are known, it is possible to establish the direction in the space of each point of the object which is represented by a pixel in the image. Using a dense digital surface model (DDSM) of the acquired object each pixel (and therefore each direction in the space) can be associated to the value of distance between the centre of perspective and the point of the object that is represented by the pixel itself. In this way each pixel can be made to the 3D position of the corresponding point of the object in an absolute reference system. The DDSM can be derived from an existing map or by using surveying instruments and procedures. A series of new instruments, based on laser technology, have recently been introduced onto the market. These instruments offer the possibility of obtaining a DDSM in a quick and cheap way. The integration of the DDSM geometric data with the image radiometric data allows a new concept of the Solid Image to be obtained. Solid images can be used in architectural, archaeological and land surveying applications to determine, in real time, the position of any point in a 3D reference system, using a common PC or to carry out correct three-dimensional measurements (lines, areas, volumes, angles, …), by just selecting some points on the image. In addition, with the Solid Image even unskilled users can easily plot profiles, sections and plans using simple drawing functions, generate stereo models and realistic 3D models. The developed software, which is able to generate and manage the solid image, is described and some examples are shown
