Cluster crushes with unknown exception
Dear Community
I seek for your help. I found this project that builds Bag-of-Features Descriptor on SIFT Features on OpenCV 2.3. I will use OpenCV 3.4.0
I tried to rewrite first part of it to Java and there are two things that are not similar between his and my code. Firstly I chose only 3 images and he chose 20. Secondly I'm not sure that TermCriteria types in C++ and Java are similar.
He uses this
CV_TERMCRIT_ITER
type. But I have only these types to choose
TermCriteria.EPS TermCriteria.COUNT TermCriteria.MAX_ITER
Here is my code
public static void main(String[] args) throws Exception{
System.loadLibrary(Core.NATIVE_LIBRARY_NAME);
FeatureDetector detector = FeatureDetector.create(FeatureDetector.ORB);
DescriptorExtractor descriptor = DescriptorExtractor.create(DescriptorExtractor.ORB);
Mat img;
MatOfKeyPoint keypoints = new MatOfKeyPoint();
Mat desc = new Mat();
Mat featuresUnclustered = new Mat();
for(String file : filename){
img = Imgcodecs.imread(file, Imgcodecs.CV_LOAD_IMAGE_GRAYSCALE);
detector.detect(img, keypoints);
descriptor.compute(img, keypoints, desc);
featuresUnclustered.push_back(desc);
}
//Construct BOWKMeansTrainer
//the number of bags
int dictionarySize=200;
//define Term Criteria
TermCriteria tc = new TermCriteria(TermCriteria.EPS | TermCriteria.MAX_ITER,100,0.001);
//retries number
int retries=1;
//necessary flags
int flags=Core.KMEANS_PP_CENTERS;
//Create the BoW (or BoF) trainer
BOWKMeansTrainer bowTrainer = new BOWKMeansTrainer(dictionarySize,tc,retries,flags);
//cluster the feature vectors
Mat dictionary=bowTrainer.cluster(featuresUnclustered);
//store the vocabulary
System.out.println(dictionary.toString());
}
And this is exception that i got
Any information will be helpful