基于FPGA的自动白平衡算法设计  

Design of Auto White Balance Algorithm Based on FPGA

作　　者：李华 蔡嘉烨 LI Hua;CAI Jiaye(School of Electronic Information and Electrical Engineering,Shangluo University,Shangluo,shaanxi 726000,China;Space System Department,Xi’an 710082,China)

机构地区：[1]商洛学院电子信息与电气工程学院,陕西商洛726000 [2]航天系统部装备部军事代表局,西安710082

出　　处：《自动化与仪器仪表》2023年第1期53-56,共4页Automation & Instrumentation

基　　金：商洛学院科研基金项目(16SKY007);商洛学院科研横项基金项目(19HKY165)。

摘　　要：为了满足工程项目需求,获取生动彩色图像,设计了一套基于FPGA实现的自动白平衡算法。首先,将RGB图像转换成YCrCb格式,然后将图像划分成16个图像子块,分别统计色差,选择色彩丰富的图像块进行白平衡校正因子的计算,从而完成图像白平衡操作。算法以一片Xilinx公司FPGA作为硬件开发平台,使用Verilog-HDL硬件描述语言并采用由总到分的模块化开发对整个系统进行硬件描述。实验结果表明,所设计的自动白平衡算法获取的彩色图像色彩逼真,算法难度适中、便于硬件开发,具有非常好的工程应用前景。In order to meet the demand of actual project and get vivid color images, this paper designs a set of automatic white balance algorithm based on FPGA implementation. First of all, the RGB image is converted into YCrCb format, and then the image is divided into 16 tiles to statistic the color difference. Thirdly, colorful image block is chosen to calculate the white balance correction factor, thus complete the white balance image operation. One Xilinx Field Programmable Gate Array (FPGA) is chosen as the hardware design platform, and the algorithm is described with Verilog-HDL to perform the modularization design from top to bottom. Experimental results show that color image obtained from the automatic white balance algorithm is vivid and low complexity, easy hardware implementation makes the algorithm has a good engineering application value.

关 键 词：自动白平衡 FPGA 图像探测器 Bayer格式图像 

分 类 号：TP391.4[自动化与计算机技术—计算机应用技术]