Following is the main achievements : firstly , it ' s the first to analyze gravel characteristics by the digital image technology 得出的主要成果如下：一首次采用先进的数字图象技术分析卵石的几何物理特性。
Then the content and structure of seabed sediment table data is analyzed and the data model of seabed sediment thematic digital map is confirmed 分析了海洋底质表格数据的存储内容与结构，确定了海洋底质专题数字图的数据模型。
After transformation of the data model and processing of the thematic mapping elements , the paper constructs a mapping system of the seabed sediment thematic digital map 经过对数据模型的转换以及专题制图要素的处理，建立了海洋底质专题数字图成图系统。
A novel edge detection operator is presented , which is the simplest operator based on regular convolution kernel . moreover , its error is no more than one pixel in the noise - free case 提出了最简边缘检测算子，它精度高，运算速度快，针对于分块均匀的数字图象具有常规算子无可比拟的检测效果。
Objective this investigation utilized a manipulated digital video imaging model to compare the preferences of profile facial esthetics by orthodontists and by a lay population of native chinese from beijing 目的本研究使用可调式数字图象模型比较美国正畸医师与中国普通人对颜面的审美观是否一致。
At the same time , multimedia information security problems including copyrights piracy emerged as side effects of the popularity of digital representation and distribution over network 因而，如何保护多媒体信息的安全成为国际上研究的热门课题。本论文主要探讨有关数字图象信息安全中的数字水印技术。
The design principle of the seabed sediment thematic digital map is researched and the production of seabed sediment thematic digital map based on seabed sediment table data is studied in this paper firstly 摘要本文研究海洋底质专题数字图的设计原则以及如何利用海洋底质调查表格数据生成海洋底质专题数字图。
In this part , the scrambling methods based on cryptography and chaos sequences are presented , and the encryption methods used in the tv are applied to the digital image scrambling 这部分中，本文提出了基于密码学算法的图象置乱方法和基于混沌序列的图象置乱方法，并把电视信号加密方法应用到数字图象置乱中去。
Chapter three give a method of detecting the movement on video through analyzing the video frames . the direction and speed of the moving object on video can also be detected by means of the method 第三章研究实现了一种数字图象序列的运动检测和运动报警算法，不仅能够实现简单运动检测，而且还能够分析出运动物体的运动方向和运动速度。
Then we propose the revised mathematics model , which enhances the image edge . on the base of precise description of digital image , we can use optimal method to get more accurate subpixel motion information 在准确的描述数字图象的基础上，我们就可以用优化的方法来得到图象间的精确可信的亚象素级运动信息，从而确定图象间的映射关系。
