该源代码实现读入一幅图像，估计图像偏红或偏蓝的色差，计算增益因子，校正色差，实现基于白点检测的自动白平衡效果。-The source code to realize read in an image, estimated image partial slant red or blue color, calculate gain factor, color correction, realize automatic white balance based on white point detection effect.