I should use opencv with java language but when i tried to implement neural network i got errors in this instruction ann.train(trainData, Ml.ROW_SAMPLE,train_labels);
// Creating Training Data
Mat trainData = new Mat();
Mat train_labels = new Mat();
for (int i = 0; i <5; i++) {
String path = Environment.getExternalStorageDirectory().toString()
+ "/Pic/folder/" + i + ".png";
Mat img = Imgcodecs.imread(path);
img.convertTo(img, CvType.CV_32FC1); // Convert to float
Size dsize = new Size(25, 25);
Imgproc.resize(img, img, dsize);
img.convertTo(img, CvType.CV_32FC1);
Mat imgResized = img.reshape(1, 1); // make continuous
trainData.push_back(imgResized);
// add 1 item
train_labels
.push_back(new Mat(1, 1, CvType.CV_32SC1, new Scalar(0)));
}
for (int i = 6; i <15; i++) {
String path = Environment.getExternalStorageDirectory().toString()
+ "/Pictures/train/" + i + ".png";
Mat img = Imgcodecs.imread(path);
img.convertTo(img, CvType.CV_32FC1); // Convert to float
Size dsize = new Size(25, 25);
Imgproc.resize(img, img, dsize);
img.convertTo(img, CvType.CV_32FC1);
Mat imgResized = img.reshape(1, 1); // make continuous
trainData.push_back(imgResized);
// add 1 item
train_labels
.push_back(new Mat(1, 1, CvType.CV_32SC1, new Scalar(1)));
}
Mat response = new Mat();
Mat tmp;
tmp = train_labels.reshape(1, 1); // make continuous
tmp.convertTo(response, CvType.CV_32FC1); // Convert to float
ANN_MLP ann=ANN_MLP.create();
TermCriteria criteria = new TermCriteria(TermCriteria.EPS +TermCriteria.MAX_ITER,100,0.1);
ann.setTermCriteria(criteria);
ann.train(trainData, Ml.ROW_SAMPLE,train_labels);
this is the error:
05-30 19:40:20.003: E/cv::error()(12928): OpenCV Error: Unspecified error (The network has not been created. Use method create or the appropriate constructor) in void cv::ml::ANN_MLPImpl::prepare_to_train(const cv::Mat&, const cv::Mat&, cv::Mat&, int), file /home/maksim/workspace/android-pack/opencv/modules/ml/src/ann_mlp.cpp, line 661
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