多维直方图联合概率分布的掩模矩阵降维算法

彩色图像的分量独立处理或感知彩色空间的强度分量处理,都能达到增强图像对比度的效果,但由于没有考虑各个分量之间的联系,不能开发完全的RGB色域。多通道直方图建模技术可以改善上述缺陷,就是通过求取多个分量的直方图联合概率密度函数和累积分布函数,从而得到彩色图像的像素灰度值映射函数,但计算联合直方图的过程也导致了过高的运算复杂度。为了降低计算量,提出了掩模降维的方法,将计算多维直方图的过程转化为了计算一维直方图,从而大大降低了运算复杂度,提高运算速度,增强对比度的效果。

Algorithm with Mask Matrix to Reduce Dimension for Multi-dimension Histogram Jointed Probability Distribution

Component-wise processing and intensity processing of perceptive color space for color image all can enhance image contrast.However,neither inter-dependency of components is considered,nor is full RGB gamut exploited completely by two methods.Multi-channel modeling can improve this defection.Multi-channel modeling calculates the histogram associated with probability density function and cumulative distribution function,and then obtains the mapping function of pixel value of color image.But,jointed channel p...