OpenCV kmeans:N&=; K异常，错误(-215) [英] OpenCV kmeans: N>=K exception, error (-215)

问题描述

当我尝试这样使用kmeans时:

when I try to use kmeans as such:

int K = 4;
Mat labels;
Mat centers;
std::vector<float> values;

// (put a bunch of values into "values" here...)

kmeans(values, K, labels, TermCriteria(TermCriteria::COUNT + TermCriteria::EPS, 10, 1.0), 10, KMEANS_PP_CENTERS, centers);

我收到错误:错误:(-215)N> = K在函数kmeans中"

I get the error: "error: (-215) N >= K in function kmeans"

values.size()= 360000，所以N明显大于K.这有什么用?谢谢.

values.size() = 360000, so N is clearly greater than K. What gives? Thanks.

推荐答案

OpenCV奇怪地将一维数据解释为1个元素的数组.

OpenCV weirdly interprets one-dimensional data as a 1 element array.

类似以下内容应该可以解决此问题:

Something like following should fix the behavior:

kmeans(cv::Mat(values).reshape(1, values.size()), K, labels, TermCriteria(TermCriteria::COUNT + TermCriteria::EPS, 10, 1.0), 10, KMEANS_PP_CENTERS, centers);

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