基于线阵CCD旋转扫描的图像重建与目标检测方法研究

发布时间：2018-04-12 22:12

  本文选题：线阵CCD旋转扫描 + 图像重建　； 参考：《南京理工大学》2017年硕士论文

【摘要】：线阵CCD旋转扫描是实现高速成像和目标探测的有效手段,本项目组针对低空成像的需要研发了一种新型的线阵CCD旋转扫描成像硬件系统。本论文以该硬件成像系统为基础,研究了线阵CCD旋转扫描的图像重建和目标检测识别问题。本文在深入资料调研的基础上,根据线阵CCD旋转扫描成像系统的针孔成像模型,建立了真实场景图像的重建模型,分析了视场角、转速、采样频率、线阵CCD有效像元数等系统参数对成像结果的影响,得到了系统参数的最佳匹配条件,为硬件系统的优化设计提供了理论基础。其次,利用DSP芯片的DMA技术和USB2.0接口技术,结合驱动程序开发了数据传输控制模块,实现了≥5.7MB/s的数据传输速率,解决了该装置Flash存储器与PC之间数据传输速率太慢的问题;采用内存映射文件技术,实现了扫描序列图像的加载、动态显示;利用序列图像中静止背景的周期性,通过图像一维投影的自相关运算,解决了线阵CCD每转采样数的快速准确计算问题,并开发了视觉坐标系下的图像重建和显示模块。基于图像分割技术和运动目标检测技术确定了重建图像中目标可能存在的区域,并对提取区域进行了基于图像模板匹配的目标识别,可快速准确的识别出目标。此外,通过研究发现,分水岭分割算法对重建图像具有较好的分割效果,基于混合高斯模型的背景差分法能够检测出复杂背景中的运动目标,基于灰度的图像模板匹配能够准确识别目标。
[Abstract]:Linear CCD rotation scanning is an effective method to realize high speed imaging and target detection. A new linear CCD rotating scanning imaging hardware system is developed to meet the needs of low altitude imaging.Based on the hardware imaging system, the image reconstruction and target detection and recognition of linear CCD rotating scanning are studied in this paper.Based on the deep investigation of the data and the pinhole imaging model of the linear CCD rotating scanning imaging system, the reconstruction model of the real scene image is established, and the angle of view, the rotation speed, the sampling frequency are analyzed.The influence of system parameters such as the effective pixel number of linear CCD on the imaging results is obtained, and the optimal matching condition of the system parameters is obtained, which provides a theoretical basis for the optimal design of the hardware system.Secondly, using the DMA technology of DSP chip and USB2.0 interface technology, the data transmission control module is developed in combination with the driver, which realizes the data transmission rate of 鈮，

本文编号：1741647