CCD MULTICAMERAS INTERACTIVE DIGITAL SYSTEM FOR CLOSE RANGE PHOTOGRAMMETRIC APPLICATIONS

摘要

In the paper a concept of a digital photogrammetric system based on the low cost CCD cameras and computer of PC type is presented. The system is mainly designed for photogrammetric 3D data acquisition of points in object space on the basis of digital images. In the proposed solution, low cost CCTV (Closed Circuit Television) - type CCD cameras were used. Orginal solution of the problem of digitization of video sequences was applied in the system. It was performed by construction of special frame grabber card. The maximum four cameras are linked with the computer through a frame grabber which is based on the modern video processor in order to provide enough power to compute images in real time. Entire hardware is managed by the software working as application in MS WINDOWS enviroment. The integrated management and photogrammetric software is briefly discussed to present the current potentialities of the whole system. Additionally, the most suitable image processing methods for contour extraction and quality improvement of visualization of digital images are implemented in the system. First experimental results, obtained from the test field studies, determine current and eventual possbilities of application of the system in close range photogrammetry - in solving of problems in the field of industrial metrology. Possible diretions of further development of the system are also given.