Abstract
The purpose of this paper is to discuss the digitization of CORONA Satellite Photographs Positive Film (CSPPF) and its availability based on actual data of constructions and field survey, focusing on the active faults and the historical ruins of the Turpan Basin, North West of China. The following results were obtained : 1) The direct stereo-optical interpretation of the CSPPF with two zoom lupes, providing more detailed information than a single image, targets with a diameter of 4 m and lineament, such as active faults, with 5 m relative height can be recognized.2) Two kinds of the digitized CSPPF image, namely Direct Digitized Image (DDI) and Expanded Digitized Image (EDI), were used for the detailed interpretation results. Digitization of the CSPPF makes it easy to exhibit the interpretation results and the stereooptical images through image processing.3) Both the target with a diameter of 7 m on the EDI and those of 10 m on the DDI can be recognized. The low linear object with a relative height of 5 m such as fault scarps and walls of ruins are also recognized on both images. Concluding from the above, DDI has sufficient resolution to interpret and display low fault scarps and cliffs of terraces.4) Both positive and negative films can be digitized, but with the former it is easier to obtain the actual image than the latter. It is efficient to select positive films to interpret small targets such as watch-towers.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.