OpenCV SVM "unsupported response type" 错误

Question

我使用以下代码来训练 opencv svm：

cv::SVMParams params;
cv::SVM svm;

params.svm_type = cv::SVM::C_SVC;
params.kernel_type = cv::SVM::LINEAR;
params.term_crit = cv::TermCriteria(CV_TERMCRIT_ITER, 100, 1e-6);

svm.train(trainData, trainLabels, cv::Mat(), cv::Mat(), this->params);

其中 trainData 是：

std::vector<std::vector<float>> data;
// Do stuff and fill data vector

cv::Mat trainData(data.size(), data.at(0).size(), CV_32FC1);

for (int i = 0; i < data.size(); ++i)
    for (int j = 0; j < data.at(0).size(); ++j)
        trainData.at<float>(i, j) = data.at(i).at(j);

和trainLabels是：

std::vector<unsigned> labels;
// Do stuff and fill labels

cv::Mat(labels);

但是我有这个错误：

C:\builds_4_PackSlave-win32-vc12-shared\opencv\modules\ml\src\inner_functions.cpp:675:error: (-210) Unsupported response type in function cvPreprocessCategoricalResponses

以前没见过，搜索也找不到

Answer 1

好吧，问题其实很简单。 cv::SVM 只是不支持标签的 unsigned int 类型，将其更改为 int 并且效果很好。

OpenCV SVM "unsupported response type" 错误

OpenCV SVM "unsupported response type" error

c++

opencv

svm