LBP與CT聯繫與區別

Local Binary Pattern (LBP) 

 Census Transforms(CT)

最近看到CT算法，感覺與LBP算法很是相近，百度沒有找到兩者的關係，很是奇怪，遂Google了一下，在On the Recent Use of Local Binary Patterns for Face Authentication文章中看到了一些介紹。兩個算法提出的時間幾乎一樣，且改進的ILBP 與 MCT出版時間也是一樣。

主要的區別還是在編碼方式上面，LBP是環狀的順序，而CT算法是橫列順序，下面是論文中的一段話：

We finally point out that, approximately in the same time the original LBP operator was introduced by Ojala [20], Zabih and Woodfill [28] proposed a very similar local structure feature. This feature, called Census Transform, also maps the local neighborhood surrounding a pixel to a bit string. With respect to LBP, the Census Transform only differs by the order of the bit string. Later, the Census Transform has been extended to become the Modified Census Transform (MCT) [7]. Again, one can point out the same similarity between ILBP and MCT (also published at the same time).