为了实现高分辨率图像采集系统图像色彩的实时校正，提出一种改进的自适应自动白平衡算法。该算法在YCbCr颜色空间进行色温估计，通过加入循环调节环节不断提高通道增益计算的精度，与其他几种典型白平衡算法相比，获得更优的颜色校正效果。根据FPGA实现特点进行硬件实现优化设计。实验结果表明：该算法图像处理速度快且占用硬件资源少，满足高分辨率图像采集系统的实时性要求。

In order to correct the unrealistic color of the images captured by the highresolution image acquisition system in real timean improved adaptive and automatic white balance algorithm was proposed.The color temperature estimation in the YCbCr color space was completed by this algorithm，and a regulation module was added to improve the calculation precision of channel gain continuously.Compared with some other automatic white balance algorithmsit could obtain better color correction performance.The circuit design was optimized according to the characteristic of FPGA.The experiment results show that the algorithm consumes less hardware resourcesis fast in image processing and can meet the realtime requirement of highresolution image acquisition system.