A Study Of The Theory And Technology For Quality Comprehensive Evaluation Of The Digital Image Map

Along with the development of the photogrammetry technology and computer technology, the digital image map is widely used in a lot of fields, and the research of its quality is getting more and more popular. In the thesis, we make a deep study around the theory and technology of the digital image map quality comprehensive evaluation, and the primal study focus on the following aspects:(1) Introduced the development of the digital image map, and analyzed the trend of the research about the quality comprehensive evaluation of the map production.(2) Described all the known methods for analyzing quality elements, and put forward a method to analyze the elements of quality based on objects with the analysis of the digital image maps' quality properties. Take advantage of combining experts' experience with users' dynamic adjustment, to build the quality model of the digital image map.(3) To study the algorithm of the automatic testing about the defined quality elements. The quality elements which can't be automatically tested by computers, give them an interactive processing way.(4) Introduced the cloud model and the conceptions related, analyzed the present condition and the feature of applying the cloud model to the field of comprehensive evaluation. To analyze the uncertainty of the digital image map and the feasibility of applying cloud model to quality comprehensive evaluation of the digital image map.(5) Studied the technology of comprehensive evaluation of the digital image map quality. Put forward an algorithm of comprehensive evaluation based on virtual cloud theory in the cloud model. To the comprehensive evaluation of the second or third grade quality elements, we adopt the floating theory of the virtual cloud, to the first grade, we adopt the integrated cloud model.(6) To test the algorithm by the experiments, and it proved that the outcome which was got from comprehensive evaluation based on cloud model is more exquisite and reliable than the others, meanwhile, the comprehensive evaluation model has a good sensitivity.