一种具有VGA接口的一体化摄像机的设计  

The Design of Integrated Camera with VGA Interface

作　　者：杨慧贞[1] 程永强[1] 段晋有[1] 

机构地区：[1]太原理工大学,山西太原030024

出　　处：《科技情报开发与经济》2011年第4期148-150,共3页Sci-Tech Information Development & Economy

基　　金：山西省自然科学基金资助(2010011019-1)

摘　　要：提出了一种具有VGA输出接口的一体化摄像机研制方案,该系统利用FPGA对图像传感器进行配置,传感器输出数字YUV信号到FPGA,利用一片DDR存储器作为帧缓存,实现图像的帧率提升、格式转换,从而使传感器采集的视频图像可在VGA显示器上实时显示;采用灰度差分自动聚焦算法,FPGA对输入的亮度信息计算图像的高频分量值,利用爬山搜索策略实现对光学电机的控制,实现图像的自动聚焦。该方案可输出高分辨率视频图像,适用于对图像清晰度有特殊要求的场合。This paper puts forward a scheme for the development of integrated camera with VGA interface,which uses FPGA to make configuration of the image sensor outputting digital YUV signal to FPGA and using a piece of DDR memory as frame buffer to realize the frame rate increase and the format conversion and therefore making the video signal captured by the image sensor be shown on the VGA monitor in real time,and uses the gray scale differential algorithm,and calculates the high frequency component values of the input luminance information with FPGA,uses the mountain climbing searching strategy to control the optical motor,and realizes the auto-focusing of the image.The system can output highresolution video images and will be used in some occasions having special requirements for image resolution.

关 键 词：一体化摄像机 FPGA 自动聚焦 

分 类 号：TN948.41[电子电信—信号与信息处理]