【摘要】 目前的CCD图像采集系统中通常采用算法提升图像采集帧率,然而该技术所增加的不真实图像帧数据会导致图像质量下降。针对这一情况,提出了一种基于CPLD(复杂可编程逻辑器件)硬件提升帧率的图像采集方案,并开发了一套相应的硬件系统。该方案通过分析CCD(电荷耦合器件)器件ICX285AL的时序特征,采用压缩帧内消隐时间和提高像素输出速率的方法提升原始数据帧的产生速率实现帧率提升,新增加的帧是CCD图像采集器件实际采集得到的真实数据,可以保证图像的完整性和真实性。最后的测试结果表明,设计的硬件系统可行性高、性能稳定,可操作性强,可以推广到其他的CCD采集系统上。更多还原

【Abstract】 The CCD image acquisition system usually adopts the algorithm to enhance image acquisition frame rate,however,the unreal image frame data increased by the technology can cause a decline in image quality. Therefore,the image acquisition system based on CPLD( Complex Programmable Logic Device) hardware improving frame rate and corresponding hardware system were developed. By analyzing the timing sequence chart of ICX285 AL CCD sensor produced by Sony Corporation,the frame rate was improved by compressing the redundancy time of a frame to the minimum and increasing the speed of producing pixel data based on the improvement of the speed of image collection. The frame is real image data collected by CCD image collector,guaranteeing the reality and integrity of the data. The experiments demonstrate the feasibility,stability and operability of this system,and can be used in other CCD sensor image acquisition systems.更多还原