这是图像识别方法bag of feature 的matlab源代码

				% IKMEANS  Integer K-means				%   [C,I] = IKMEANS(X,K) cluster the data X (one element per				%   column) using the K-means method. The function returns a list				%   of K cluster centers C and the assignments I of each datum to				%   its cluster.				%				%   IKMEANS() requires that X is of datatype `uint8' (hence the				%   I suffix).