灰度世界法中改进的方法，结合信息熵的性质及其意义，在一维熵的基础上引入能够反映灰度分布空间特征的特征量来组成图像的二维熵,达到校正图像的目的.-Gray world method improved method, combined with the nature and significance of the information entropy is introduced to reflect the spatial intensity distribution characteristic