OpenCV 3.0 NormalBayesClassifier预测错误

Question

我在C++中使用OpenCV 3.0.0来训练Normal Bayes分类器。我训练了分类器，并将其存储到一个文件中。现在我正在尝试使用分类器来预测响应。下面是相关代码：

Ptr<TrainData> trainingData = TrainData::loadFromCSV(trainingDataFile,0); 
std::cout << "Training data has been loaded.\n"; 
Mat samples = trainingData->getTrainSamples(); 
Mat correctResponses = trainingData->getTrainResponses(); 

std::cout << "Loading NB classifier...\n"; 
Ptr<NormalBayesClassifier> nbClassifier = NormalBayesClassifier::load<NormalBayesClassifier>(trainingDataFile+"_trainedNBParams.dat"); 
std::cout << "NB classifier loaded.\n"; 

Mat receivedResponses; 
std::cout << "Classifying data using NB classifier...\n"; 
nbClassifier->predict(samples,receivedResponses); //error here 
std::cout << "Classification complete.\n"; 

我收到以下错误：

OpenCV Error: Null pointer (When the number of input samples is >1, the output vector of results must be passed) in predictProb, file /home/keyur/OpenCV/opencv-3.0.0/modules/ml/src/nbayes.cpp, line 318 
terminate called after throwing an instance of 'cv::Exception' 
    what(): /home/keyur/OpenCV/opencv-3.0.0/modules/ml/src/nbayes.cpp:318: error: (-27) When the number of input samples is >1, the output vector of results must be passed in function predictProb 

我不明白输出矩阵应该如何被传递给函数。该文档相当模糊，其他StackOverflow答案对这个特定的问题是无益的。

文档链接： http://docs.opencv.org/3.0.0/d4/d8e/classcv_1_1ml_1_1NormalBayesClassifier.html

Answer 1

错误是由于其已被固定在OpenCV的3.1.0中的OpenCV 3.0.0中的错误。