基于FPGA的暗通道白平衡算法设计与实现

Design and implementation of dark channel white balance algorithm based on FPGA

为确保系统实时性以及解决完美反射法在曝光环境中失效的问题,提出一种基于FPGA的暗通道自动白平衡校正算法。通过彩色图像暗通道光线透射率分布情况,选取参考像素点实现偏色像素点自动白平衡校正。实验结果表明,暗通道自动白平衡算法使用FPGA校正可以满足整个系统的实时性要求和消除过度曝光环境影响;同时可以使其有效应用于动态场景中。

In order to ensure the real-time performance of the system and solve the problem that the perfect reflection method fails in the exposure environment,this paper proposes an FPGA-based dark channel automatic white balance correction algorithm.According to the light transmittance distribution of the dark channel of the color image,the reference pixels are selected to realize the automatic white balance correction of the color cast pixels.Experimental results show that the dark channel automatic white balance algorithm using FPGA correction can meet the real-time requirements of the entire system and eliminate the environmental impact of overexposure.At the same time,it can be effectively applied to dynamic scenes.