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我得到一個運行時空白屏幕在android + opencv的距離變換我使用「mRgba = inputframe.rgba（）;」從攝像頭獲取輸入信息，而不是我進行閾值和所有距離轉換工作。我不知道在哪裏什麼是錯的任何人都可以請回答我錯誤在運行時空白屏幕在opencv + android的距離變換
我的代碼是事先下面
感謝名單給
package com.example.lastdemo;
import java.util.ArrayList;
import java.util.List;
import org.opencv.android.BaseLoaderCallback;
import org.opencv.android.CameraBridgeViewBase;
import org.opencv.android.CameraBridgeViewBase.CvCameraViewFrame;
import org.opencv.android.CameraBridgeViewBase.CvCameraViewListener2;
import org.opencv.android.LoaderCallbackInterface;
import org.opencv.android.OpenCVLoader;
import org.opencv.core.Core;
import org.opencv.core.CvType;
import org.opencv.core.Mat;
import org.opencv.core.MatOfPoint;
import org.opencv.imgproc.Imgproc;
import android.os.Bundle;
import android.app.Activity;
import android.graphics.Bitmap;
import android.graphics.Color;
import android.util.Log;
import android.view.Menu;
import android.view.SurfaceView;
import android.view.WindowManager;
public class MainActivity extends Activity implements CvCameraViewListener2 {
private static final String TAG = "OCVSample::Activity";
public Bitmap newBitmap,bitmap;
public int no;
public Mat mBin = new Mat(),dist_8u;
public Bitmap bmpBinary;
public Mat imageMat;
public List<MatOfPoint> contours = new ArrayList<MatOfPoint>();
public Mat hierarchy = new Mat();
public Mat mRgba = new Mat();
public Mat mGray = new Mat();
public Mat mTemp = new Mat();
private CameraBridgeViewBase mOpenCvCameraView;
private BaseLoaderCallback mLoaderCallback = new BaseLoaderCallback(this) {
@Override
public void onManagerConnected(int status) {
switch (status) {
case LoaderCallbackInterface.SUCCESS:
{
Log.i(TAG, "OpenCV loaded successfully");
mOpenCvCameraView.enableView();
//mOpenCvCameraView.setOnTouchListener(MainActivity.this);
} break;
default:
{
super.onManagerConnected(status);
} break;
}
}
};
public MainActivity() {
Log.i(TAG, "Instantiated new " + this.getClass());
}
@Override
protected void onCreate(Bundle savedInstanceState) {
Log.i(TAG, "called onCreate");
super.onCreate(savedInstanceState);
getWindow().addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);
setContentView(R.layout.tutorial1_surface_view);
mOpenCvCameraView = (CameraBridgeViewBase) findViewById (R.id.tutorial1_activity_java_surface_view);
mOpenCvCameraView.setVisibility(SurfaceView.VISIBLE);
mOpenCvCameraView.setCvCameraViewListener(this);
}
@Override
public void onPause()
{
super.onPause();
if (mOpenCvCameraView != null)
mOpenCvCameraView.disableView();
}
@Override
public void onResume()
{
super.onResume();
OpenCVLoader.initAsync(OpenCVLoader.OPENCV_VERSION_2_4_3, this,
mLoaderCallback);
}
public void onDestroy() {
super.onDestroy();
if (mOpenCvCameraView != null)
mOpenCvCameraView.disableView();
}
public void onCameraViewStarted(int width, int height) {
mGray = new Mat();
mRgba = new Mat();
}
public void onCameraViewStopped() {
}
public Mat onCameraFrame(CvCameraViewFrame inputFrame) {
mRgba = inputFrame.rgba();
Imgproc.cvtColor(mRgba, mGray, Imgproc.COLOR_BGRA2GRAY);
/*Bitmap resultBitmap = Bitmap.createBitmap(mGray.cols(), mGray.rows(),Bitmap.Config.ARGB_8888);;
Utils.matToBitmap(mGray, resultBitmap);
Bitmap mResult = resultBitmap;
toBinary(mResult);
imageMat = new Mat(bmpBinary.getHeight(), bmpBinary.getWidth(), CvType.CV_8U,new Scalar(4));
Bitmap myBitmap32 = bmpBinary.copy(Bitmap.Config.ARGB_8888, true);
Utils.bitmapToMat(myBitmap32, imageMat);*/
Imgproc.threshold(mGray, mBin, 40, 255, Imgproc.THRESH_BINARY);
//Imgproc.distanceTransform_0(imageMat.nativeObj, mTemp.nativeObj, Imgproc.DIST_LABEL_PIXEL, 3);
Imgproc.distanceTransform(mBin, mTemp, Imgproc.DIST_LABEL_PIXEL, 3);
Core.normalize(mTemp, mBin, 0, 1., Core.NORM_MINMAX);
Imgproc.threshold(mBin, mBin, .5, 1., Imgproc.THRESH_BINARY);
mBin.convertTo(dist_8u, CvType.CV_8U);
hierarchy = new Mat();
Imgproc.findContours(dist_8u, contours, hierarchy, Imgproc.RETR_EXTERNAL, Imgproc.CHAIN_APPROX_SIMPLE);
no = contours.size();
return dist_8u;
}
public void toBinary(Bitmap mGray) {
int width, height, threshold;
height = mGray.getHeight();
width = mGray.getWidth();
threshold = 32;
bmpBinary = Bitmap.createBitmap(mGray);
for(int x = 0; x < width; ++x) {
for(int y = 0; y < height; ++y) {
// get one pixel color
int pixel = mGray.getPixel(x, y);
int red = Color.red(pixel);
//get binary value
if(red < threshold){
bmpBinary.setPixel(x, y, 0xFF000000);
} else{
bmpBinary.setPixel(x, y, 0xFFFFFFFF);
}
}
}
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
}
請忽略toBinary（）方法時什麼也沒有 – Div