Annular histogram method was introduced to represent heterogeneous flow features with taking concentration spatial distribution and heterogeneity information into consideration.
采用环状直方图，从浓度空间分布和信息量两个方面对流动非均匀性进行了描述。
2
One of short points of traditional color histogram is lack of spatial information .
传统的直方图一般不包括颜色的空间分布信息。
3
Content based image retrieval techniques usually use the color histogram of the full image. But this method can't contain the spatial features.