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为了能够在低光照强度情况下,获得高清图像,达到夜晚监控的目的;采用了嵌入式的设计方法,根据具体的应用需求,选择了低照度高解析度的CCD芯片ICX285AQ以及与之相匹配的时序产生芯片CXD3607R,作为图像采集模块的设计,实现了光信号到电信号的转换;采用AD9940A芯片,完成采集到的模拟信号到数字信号的转换;将获得的数字信号经过主处理芯片TMS320DM355进行图像前端处理,后端处理后,送到网络接口芯片DM9000A,经过网络在上位机实时获取视频图像。
In order to be able to obtain high-definition images under low light intensity, to achieve the purpose of night monitoring; using an embedded design method, according to the specific application needs, chose low-illumination high-resolution CCD chip ICX285AQ and matched Timing chip CXD3607R, as the image acquisition module design, the realization of the optical signal to electrical signal conversion; the use of AD9940A chip to complete the acquisition of the analog signal to the digital signal conversion; the digital signal obtained through the main processing chip TMS320DM355 image Front-end processing, back-end processing, sent to the network interface chip DM9000A, through the network in the host computer to obtain video images in real time.