在this tutorial from openCV之后,它应该很简单。但是,它崩溃并在net.forward上断言失败,使我无法在其他任何地方解析/查找。
想法this problem似乎很相似,并试图进行修复/问题查找。但是,重新开始讨论和试验表明事实可能并非如此。我最初使用的是3.4.3,但不支持相同的Mat类型。现在更新为3.4.7,可以确认Blob大小正常(从图像生成)。还尝试了其他各种prototxt和caffemodel,但是现在怀疑问题出在哪里(如果文件还可以,则可以工作,否则净加载失败)。关键代码应为:
// Load a network.
public void onCameraViewStarted(int width, int height) {
String proto = getPath("deploy.prototxt", this);
String weights = getPath("MobileNetSSD_deploy.caffemodel", this);
net = Dnn.readNetFromCaffe(proto, weights);
Log.i(TAG, "Network loaded successfully");
}
public Mat onCameraFrame(CvCameraViewFrame inputFrame) {
// Get a new frame
Mat frame = inputFrame.rgba();
Imgproc.cvtColor(frame, frame, Imgproc.COLOR_RGBA2RGB);
// Forward image through network.
Mat blob = Dnn.blobFromImage(frame, 0.007843,
new Size(300, 300),
new Scalar(127.5, 127.5, 127.5));
net.setInput(blob);
Mat detections = net.forward(); //***215 ASSERTION FAILED occurs***
int cols = frame.cols();
int rows = frame.rows();
detections = detections.reshape(1, (int)detections.total() / 7);
for (int i = 0; i < detections.rows(); ++i) {
double confidence = detections.get(i, 2)[0];
if (confidence > 0.2) {
int classId = (int)detections.get(i, 1)[0];
int left = (int)(detections.get(i, 3)[0] * cols);
int top = (int)(detections.get(i, 4)[0] * rows);
int right = (int)(detections.get(i, 5)[0] * cols);
int bottom = (int)(detections.get(i, 6)[0] * rows);
// Draw rectangle around detected object.
Imgproc.rectangle(frame, new Point(left, top), new Point(right, bottom),
new Scalar(0, 255, 0));
String label = classNames[classId] + ": " + confidence;
int[] baseLine = new int[1];
Size labelSize = Imgproc.getTextSize(label, Core.FONT_HERSHEY_SIMPLEX, 0.5, 1, baseLine);
// Draw background for label.
Imgproc.rectangle(frame, new Point(left, top - labelSize.height),
new Point(left + labelSize.width, top + baseLine[0]),
new Scalar(255, 255, 255), Core.FILLED);
// Write class name and confidence.
Imgproc.putText(frame, label, new Point(left, top),
Core.FONT_HERSHEY_SIMPLEX, 0.5, new Scalar(0, 0, 0));
}
}
return frame;
}
public void onCameraViewStopped() {}
// Upload file to storage and return a path.
private static String getPath(String file, Context context) {
AssetManager assetManager = context.getAssets();
BufferedInputStream inputStream = null;
try {
// Read data from assets.
inputStream = new BufferedInputStream(assetManager.open(file));
byte[] data = new byte[inputStream.available()];
inputStream.read(data);
inputStream.close();
// Create copy file in storage.
File outFile = new File(context.getFilesDir(), file);
FileOutputStream os = new FileOutputStream(outFile);
os.write(data);
os.close();
// Return a path to file which may be read in common way.
return outFile.getAbsolutePath();
} catch (IOException ex) {
Log.i(TAG, "Failed to upload a file");
}
return "";
}
完整的错误消息是
cv :: Exception:OpenCV(3.4.7)/build/3_4_pack-android/opencv/modules/dnn/src/layers/batch_norm_layer.cpp:39:错误:(-215:断言失败)blobs.size( )> = 2在函数'cv :: dnn :: BatchNormLayerImpl :: BatchNormLayerImpl(const cv :: dnn :: experimental_dnn_34_v13 :: LayerParams&)'
我希望它不会崩溃。框架应该没问题(图像已加载),网络不为空,网络中的各层看起来也都很好(已检查,因为在Java中使用caffe时存在一些差异)。任何帮助表示赞赏!
答案 0 :(得分:0)
经过几天不同方向的研究,我发现了问题:帧格式应该是BGR,而不是RGB!那是
Imgproc.cvtColor(frame, frame, Imgproc.COLOR_RGBA2BGR);