论文部分内容阅读
图象校正与图象相关是摄影测量判读的两项重要任务。如果它们有可能使每幅图象的判读时间缩短至几分钟,那么就能够使新的自动方法成功。这一点似乎要通过数字图象处理来达到。这种方法目前受到如下的限制:1)输入和输出;2)数据传递;3)存储;4)计算。鉴于以上限制,作为几何图象处理最有效的手段为:a)在输入和输出过程中,数据传递速度为1MH_z的快速磁鼓;b)数据传递和数据存储用的高密度磁带(HDDT);c)为计算机用的并联透视程序计算机。文章介绍一种联机方法,这种方法是由一组按“流水线”方式工作的并行透视程序计算机,与一套具有高速转鼓的激光偏折系统组合而成。正如在类似的系统中一样,应当设计一个面积相关器,它可以很快地把要校正的图象进行相关处理。这样就引出一个数字图象处理系统的建议,该系统今天可用于摄影图象的处理,将来可用于数字照相机图象的处理。
Image Correction and Image Correlation are two important tasks in photogrammetry interpretation. If they are likely to shorten the interpretation time per image to a few minutes, then the new automatic method can be successful. This seems to be achieved through digital image processing. This method is currently subject to the following restrictions: 1) input and output; 2) data transfer; 3) storage; 4) calculation. In view of the above limitations, the most effective means of geometric image processing are: a) a fast drum with a data transfer rate of 1MH_z during input and output; b) a high density tape (HDDT) for data transfer and data storage; c) Parallel perspective computer for computers. This article describes an online method that consists of a series of parallel-looking computer programs running in a “pipelined” fashion combined with a laser deflection system with a high-speed drum. As in similar systems, an area correlator should be designed that correlates images to be corrected very quickly. This leads to the suggestion of a digital image processing system which today can be used for the processing of photographic images and for future use in the processing of digital camera images.