大幅专业扫描仪相关图像处理功能的设计与实现

发布时间：2018-03-18 11:02

本文选题：大幅专业扫描仪　切入点：图像分割　出处：《西安电子科技大学》2013年硕士论文　论文类型：学位论文

【摘要】：随着大幅专业扫描仪在各个领域日益普遍的应用，用户对扫描精度、图像质量和工作效率要求越来越高，促进了大幅专业扫描仪的不断创新和研发。本文所述的大幅专业扫描仪采用模块化的思想将整个系统分为上层驱动软件、中间层控制系统和底层图像数据采集系统。本文主要对扫描仪相关图像处理功能进行了设计和实现，，位于上层驱动软件的图像处理模块。首先对图像分割的相关理论进行了研究和分析；接着在明确扫描仪对图像分割功能的具体需求之后，分别设计了基于阈值和基于边缘的图像分割算法；最后对两种图像分割算法进行了实现，并将图像分割功能整合到扫描仪上层驱动软件中。两种算法都采用由外向内逐行（或逐列）搜索分割边界的思想，其中阈值分割算法利用每行（或每列）的灰度均值进行边界的判定；而边缘分割算法则基于改进的Sobel算子进行边缘点的检测来确定边界位置。本文还对TIFF和RAW两种图像格式进行了研究，并在大幅专业扫描仪中实现了这两种格式文件的生成。经过联机调试，本文设计的两种图像分割算法都在各自应用场景下达到了预期的分割效果，有效地优化了扫描仪的处理流程，提高了工作效率。扫描仪对TIFF和RAW两种图像格式也得到了很好的支持，扩展了大幅专业扫描仪的应用范围。
[Abstract]:With the increasingly widespread application of large scale professional scanners in various fields, users require more and more high scanning accuracy, image quality and work efficiency, which promote the innovation and development of large scale professional scanners. The large scale professional scanner described in this paper adopts the idea of modularization to divide the whole system into upper driving software. The middle layer control system and the bottom image data acquisition system are designed and implemented in this paper. The image processing module is located in the upper driving software. Firstly, the related theory of image segmentation is studied and analyzed, and then the specific requirements of the scanner for image segmentation are clarified. Image segmentation algorithms based on threshold and edge are designed, and finally, two image segmentation algorithms are implemented. The image segmentation function is integrated into the upper driving software of scanner. Both algorithms adopt the idea of searching the segmentation boundary from outside to inside line by line (or column by column). The threshold segmentation algorithm uses the gray mean of each row (or column) to judge the boundary. The edge segmentation algorithm is based on the improved Sobel operator to detect edge points to determine the edge position. In this paper, two image formats, TIFF and RAW, are studied, and the two formats are generated in a large scale professional scanner. After on-line debugging, the two image segmentation algorithms designed in this paper have achieved the expected segmentation effect in their respective application scenes, and have effectively optimized the processing flow of the scanner. The scanner also has good support for TIFF and RAW image formats and extends the application range of large scale professional scanners.
【学位授予单位】：西安电子科技大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TP391.41;TP334.22

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