基于FPGA+DSP技术的Bayer格式图像预处理  

Preprocess of Bayer pattern image based on FPGA+DSP

作　　者：滕伟[1] 安博文[1] 

机构地区：[1]上海海事大学信息工程学院,上海200135

出　　处：《电子设计工程》2010年第10期145-147,151,共4页Electronic Design Engineering

基　　金：国家高科技研究863计划资助项目(2007AA12Z152)

摘　　要：提出一种针对CMOS图像传感器采集的Bayer格式图像预处理系统,与传统的DSP图像处理系统相比,该系统利用Spartan-3系列的XC3S1500和TMS320DM642型DSP相结合实现图像捕获、图像预处理等功能,采用支持USB2.0的CY7C68013将图像信息传送给上位机。在FPGA中采用双线性插值法将CMOS图像传感器采集的Bayer格式图像数据转换为RGB格式图像数据,并转换成Y亮度信号。实验结果表明,该系统能处理分辨率达500万像素的Bayer图像,并最终以20 Mb/s的带宽将亮度信号传输给上位机,缩短了开发周期,提高了图像处理的实时性。This paper proposed an image preprocessing system for Bayer pattern from CMOS image sensor. Compared to traditional DSP image processing system, this system uses the XC3S1500 Spartan-3 series and TMS320DM642 DSP to achieve image capture, image pre-processing and other functions. The image information is transmitted to the host computer by CY7C68013 which is supported USB2.0. In the FPGA, the Bayer format image signal captured from COMS sensor is converted to RGB format data by way of bilinear interpolation, and is converted to Y luiminance signal. Experimental results show that the system can handle up to 500 million pixels of resolution Bayer image, and eventually to 20Mb/s of bandwidth to transmit the brightness signal to the host computer, shorten the development cycle and improve the real-time image processing.

关 键 词：BAYER格式 双线性插值法 Y亮度信号 TMS320DM642 

分 类 号：TN911.7[电子电信—通信与信息系统]