質問編集履歴
4
ソースコードの削除
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### 該当のソースコード
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```Java
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package com.android.example.samplecameraxandopencv;
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import static org.opencv.core.CvType.CV_8U;
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import static org.opencv.core.CvType.CV_8UC3;
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import static org.opencv.core.CvType.CV_8UC4;
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import androidx.annotation.NonNull;
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import androidx.appcompat.app.AppCompatActivity;
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import androidx.camera.core.Camera;
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import androidx.camera.core.CameraSelector;
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import androidx.camera.core.ImageAnalysis;
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import androidx.camera.core.ImageProxy;
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import androidx.camera.core.Preview;
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import androidx.camera.lifecycle.ProcessCameraProvider;
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import androidx.camera.view.PreviewView;
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import androidx.core.app.ActivityCompat;
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import androidx.core.content.ContextCompat;
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import androidx.lifecycle.LifecycleOwner;
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import android.Manifest;
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import android.app.Activity;
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import android.content.Context;
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import android.content.pm.PackageManager;
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import android.graphics.Bitmap;
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import android.os.Bundle;
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import android.util.Log;
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import android.view.Surface;
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import android.widget.ImageView;
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import com.google.common.util.concurrent.ListenableFuture;
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import org.opencv.android.OpenCVLoader;
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import org.opencv.android.Utils;
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import org.opencv.core.Core;
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import org.opencv.core.CvType;
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import org.opencv.core.Mat;
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import org.opencv.core.Point;
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import org.opencv.core.Rect;
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import org.opencv.core.Scalar;
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import org.opencv.core.Size;
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import org.opencv.imgproc.Imgproc;
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import java.nio.ByteBuffer;
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import java.util.concurrent.ExecutorService;
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import java.util.concurrent.Executors;
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public class MainActivity extends AppCompatActivity {
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/*** Fixed values - 固定値 ***/
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private static final String TAG = "MyApp";
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private int REQUEST_CODE_FOR_PREMISSIONS = 1234;
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private final String[] REQUIRED_PERMISSIONS = new String[]{"android.permission.CAMERA", "android.permission.WRITE_EXTERNAL_STORAGE"};
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/*** Views ***/
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private PreviewView previewView;
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private ImageView imageView;
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/*** For CameraX ***/
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private Camera camera = null;
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private Preview preview = null;
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private ImageAnalysis imageAnalysis = null;
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private ExecutorService cameraExecutor = Executors.newSingleThreadExecutor();
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static {
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System.loadLibrary("opencv_java4"); // 追加
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}
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@Override
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protected void onCreate(Bundle savedInstanceState) {
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super.onCreate(savedInstanceState);
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setContentView(R.layout.activity_main);
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previewView = findViewById(R.id.previewView);
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imageView = findViewById(R.id.imageView);
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if(checkPermissions()){
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startCamera();
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} else {
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ActivityCompat.requestPermissions(this,REQUIRED_PERMISSIONS,REQUEST_CODE_FOR_PREMISSIONS);
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}
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}
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private void startCamera(){
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final ListenableFuture<ProcessCameraProvider> cameraProviderFuture = ProcessCameraProvider.getInstance(this);
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Context context = this;
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cameraProviderFuture.addListener(new Runnable() {
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@Override
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public void run() {
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try {
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ProcessCameraProvider cameraProvider = cameraProviderFuture.get();
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preview = new Preview.Builder().build();
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imageAnalysis = new ImageAnalysis.Builder().build();
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imageAnalysis.setAnalyzer(cameraExecutor, new MyImageAnalyzer());
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CameraSelector cameraSelector = new CameraSelector.Builder().requireLensFacing(CameraSelector.LENS_FACING_BACK).build();
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cameraProvider.unbindAll();
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camera = cameraProvider.bindToLifecycle((LifecycleOwner) context, cameraSelector,preview, imageAnalysis);
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preview.setSurfaceProvider(previewView.createSurfaceProvider(camera.getCameraInfo()));
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} catch (Exception e){
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Log.e(TAG, "[StartCamera] Use case binding failed", e);
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}
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}
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},ContextCompat.getMainExecutor(this));
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}
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private class MyImageAnalyzer implements ImageAnalysis.Analyzer {
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private Mat matPrevious = null;
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@Override
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public void analyze(@NonNull ImageProxy image) {
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/* Create cv::mat(RGB888) from image(NV21) */
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Mat matOrg = getMatFromImage(image);
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@@ -161,88 +53,6 @@
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mat.put(i,j,data);
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}
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}
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/* Convert cv::mat to bitmap for drawing */
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Bitmap bitmap = Bitmap.createBitmap(mat.cols(), mat.rows(),Bitmap.Config.ARGB_8888);
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Utils.matToBitmap(mat, bitmap);
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/* Display the result onto ImageView */
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runOnUiThread(new Runnable() {
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@Override
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public void run() {
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imageView.setImageBitmap(bitmap);
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}
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});
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/* Close the image otherwise, this function is not called next time */
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image.close();
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}
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//NV21画像をOpenCVで使えるようにする(mat)
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private Mat getMatFromImage(ImageProxy image) {
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/* https://stackoverflow.com/questions/30510928/convert-android-camera2-api-yuv-420-888-to-rgb */
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ByteBuffer yBuffer = image.getPlanes()[0].getBuffer();
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ByteBuffer uBuffer = image.getPlanes()[1].getBuffer();
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ByteBuffer vBuffer = image.getPlanes()[2].getBuffer();
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int ySize = yBuffer.remaining();
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int uSize = uBuffer.remaining();
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int vSize = vBuffer.remaining();
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byte[] nv21 = new byte[ySize + uSize + vSize];
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yBuffer.get(nv21, 0, ySize);
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vBuffer.get(nv21, ySize, vSize);
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uBuffer.get(nv21, ySize + vSize, uSize);
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Mat yuv = new Mat(image.getHeight() + image.getHeight() / 2, image.getWidth(), CvType.CV_8UC1);
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yuv.put(0, 0, nv21);
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Mat mat = new Mat();
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Imgproc.cvtColor(yuv, mat, Imgproc.COLOR_YUV2RGB_NV21, 3);
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return mat;
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}
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private Mat fixMatRotation(Mat matOrg) {
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Mat mat;
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switch (previewView.getDisplay().getRotation()){
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default:
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case Surface.ROTATION_0:
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mat = new Mat(matOrg.cols(), matOrg.rows(), matOrg.type());
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Core.transpose(matOrg, mat);
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Core.flip(mat, mat, 1);
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break;
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case Surface.ROTATION_90:
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mat = matOrg;
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break;
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case Surface.ROTATION_270:
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mat = matOrg;
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Core.flip(mat, mat, -1);
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break;
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}
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return mat;
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}
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}
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private boolean checkPermissions(){
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for(String permission : REQUIRED_PERMISSIONS){
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if(ContextCompat.checkSelfPermission(this, permission) != PackageManager.PERMISSION_GRANTED){
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return false;
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}
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}
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return true;
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}
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@Override
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public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
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// super.onRequestPermissionsResult(requestCode, permissions, grantResults);
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super.onRequestPermissionsResult(requestCode, permissions, grantResults);
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if (requestCode == REQUEST_CODE_FOR_PREMISSIONS){
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237
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if (checkPermissions()) {
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startCamera();
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} else {
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Log.i(TAG, "[onRequestPermissionsResult] Failed to get permissions");
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this.finish();
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}
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}
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}
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}
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```
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### 試したこと
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3
コードの追記
test
CHANGED
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File without changes
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test
CHANGED
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@@ -29,7 +29,111 @@
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29
29
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### 該当のソースコード
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|
30
30
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31
31
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```Java
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32
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+
package com.android.example.samplecameraxandopencv;
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33
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+
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34
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+
import static org.opencv.core.CvType.CV_8U;
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35
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+
import static org.opencv.core.CvType.CV_8UC3;
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36
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+
import static org.opencv.core.CvType.CV_8UC4;
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37
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+
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38
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+
import androidx.annotation.NonNull;
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39
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+
import androidx.appcompat.app.AppCompatActivity;
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40
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+
import androidx.camera.core.Camera;
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41
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+
import androidx.camera.core.CameraSelector;
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42
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+
import androidx.camera.core.ImageAnalysis;
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43
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+
import androidx.camera.core.ImageProxy;
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44
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+
import androidx.camera.core.Preview;
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45
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+
import androidx.camera.lifecycle.ProcessCameraProvider;
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46
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+
import androidx.camera.view.PreviewView;
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47
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+
import androidx.core.app.ActivityCompat;
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48
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+
import androidx.core.content.ContextCompat;
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49
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+
import androidx.lifecycle.LifecycleOwner;
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50
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+
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51
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+
import android.Manifest;
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52
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+
import android.app.Activity;
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53
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import android.content.Context;
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54
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+
import android.content.pm.PackageManager;
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55
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+
import android.graphics.Bitmap;
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56
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import android.os.Bundle;
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57
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import android.util.Log;
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58
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+
import android.view.Surface;
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59
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+
import android.widget.ImageView;
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60
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+
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61
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+
import com.google.common.util.concurrent.ListenableFuture;
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62
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+
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63
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+
import org.opencv.android.OpenCVLoader;
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64
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import org.opencv.android.Utils;
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65
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import org.opencv.core.Core;
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66
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+
import org.opencv.core.CvType;
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67
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+
import org.opencv.core.Mat;
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68
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+
import org.opencv.core.Point;
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69
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+
import org.opencv.core.Rect;
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70
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import org.opencv.core.Scalar;
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71
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+
import org.opencv.core.Size;
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72
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+
import org.opencv.imgproc.Imgproc;
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73
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+
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74
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+
import java.nio.ByteBuffer;
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75
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+
import java.util.concurrent.ExecutorService;
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76
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+
import java.util.concurrent.Executors;
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77
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+
|
|
78
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+
public class MainActivity extends AppCompatActivity {
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|
79
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+
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80
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+
/*** Fixed values - 固定値 ***/
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81
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+
private static final String TAG = "MyApp";
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82
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+
private int REQUEST_CODE_FOR_PREMISSIONS = 1234;
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83
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+
private final String[] REQUIRED_PERMISSIONS = new String[]{"android.permission.CAMERA", "android.permission.WRITE_EXTERNAL_STORAGE"};
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|
84
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+
|
|
85
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+
/*** Views ***/
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86
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+
private PreviewView previewView;
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87
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+
private ImageView imageView;
|
|
88
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+
/*** For CameraX ***/
|
|
89
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+
private Camera camera = null;
|
|
90
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+
private Preview preview = null;
|
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91
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+
private ImageAnalysis imageAnalysis = null;
|
|
92
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+
private ExecutorService cameraExecutor = Executors.newSingleThreadExecutor();
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|
93
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+
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94
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+
static {
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95
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+
System.loadLibrary("opencv_java4"); // 追加
|
|
96
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+
}
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|
97
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+
|
|
98
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+
@Override
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|
99
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+
protected void onCreate(Bundle savedInstanceState) {
|
|
100
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+
super.onCreate(savedInstanceState);
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101
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+
setContentView(R.layout.activity_main);
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|
102
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+
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103
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+
previewView = findViewById(R.id.previewView);
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104
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+
imageView = findViewById(R.id.imageView);
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|
105
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+
|
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106
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+
if(checkPermissions()){
|
|
107
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+
startCamera();
|
|
108
|
+
} else {
|
|
109
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+
ActivityCompat.requestPermissions(this,REQUIRED_PERMISSIONS,REQUEST_CODE_FOR_PREMISSIONS);
|
|
110
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+
}
|
|
111
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+
}
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|
112
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+
|
|
113
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+
private void startCamera(){
|
|
114
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+
final ListenableFuture<ProcessCameraProvider> cameraProviderFuture = ProcessCameraProvider.getInstance(this);
|
|
115
|
+
Context context = this;
|
|
116
|
+
cameraProviderFuture.addListener(new Runnable() {
|
|
117
|
+
@Override
|
|
118
|
+
public void run() {
|
|
119
|
+
try {
|
|
120
|
+
ProcessCameraProvider cameraProvider = cameraProviderFuture.get();
|
|
121
|
+
preview = new Preview.Builder().build();
|
|
122
|
+
imageAnalysis = new ImageAnalysis.Builder().build();
|
|
123
|
+
imageAnalysis.setAnalyzer(cameraExecutor, new MyImageAnalyzer());
|
|
124
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+
CameraSelector cameraSelector = new CameraSelector.Builder().requireLensFacing(CameraSelector.LENS_FACING_BACK).build();
|
|
125
|
+
|
|
126
|
+
cameraProvider.unbindAll();
|
|
127
|
+
camera = cameraProvider.bindToLifecycle((LifecycleOwner) context, cameraSelector,preview, imageAnalysis);
|
|
128
|
+
preview.setSurfaceProvider(previewView.createSurfaceProvider(camera.getCameraInfo()));
|
|
129
|
+
} catch (Exception e){
|
|
130
|
+
Log.e(TAG, "[StartCamera] Use case binding failed", e);
|
|
131
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+
}
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|
132
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+
}
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|
133
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+
},ContextCompat.getMainExecutor(this));
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|
134
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+
}
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|
135
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+
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|
32
|
-
private class MyImageAnalyzer implements ImageAnalysis.Analyzer {
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|
136
|
+
private class MyImageAnalyzer implements ImageAnalysis.Analyzer {
|
|
33
137
|
private Mat matPrevious = null;
|
|
34
138
|
|
|
35
139
|
@Override
|
|
@@ -39,6 +143,12 @@
|
|
|
39
143
|
/* 画像を回転 */
|
|
40
144
|
Mat fixMat = fixMatRotation(matOrg);
|
|
41
145
|
|
|
146
|
+
/***
|
|
147
|
+
Log.i(TAG, "[analyze] width = " + image.getWidth() + ", height = " + image.getHeight() + "Rotation = " + previewView.getDisplay().getRotation());
|
|
148
|
+
Log.i(TAG, "[analyze] mat width = " + fixMat.cols() + ", mat height = " + fixMat.rows());
|
|
149
|
+
type = 16, depth = 0, channels = 3, isContinuous = true
|
|
150
|
+
Log.i(TAG, "type = " + fixMat.type() + ", depth = " + fixMat.depth() + ", channels = " + fixMat.channels() + ", isContinuous = " + fixMat.isContinuous());
|
|
151
|
+
***/
|
|
42
152
|
Size sizeMat = fixMat.size();
|
|
43
153
|
Mat mat = fixMat.clone();
|
|
44
154
|
|
|
@@ -51,22 +161,88 @@
|
|
|
51
161
|
mat.put(i,j,data);
|
|
52
162
|
}
|
|
53
163
|
}
|
|
54
|
-
|
|
164
|
+
|
|
55
|
-
Imgproc.cvtColor(mat,mat,Imgproc.COLOR_RGB2GRAY);
|
|
56
|
-
Imgproc.cvtColor(mat,mat,Imgproc.COLOR_GRAY2BGR);
|
|
57
|
-
|
|
58
|
-
/* mat
|
|
165
|
+
/* Convert cv::mat to bitmap for drawing */
|
|
59
166
|
Bitmap bitmap = Bitmap.createBitmap(mat.cols(), mat.rows(),Bitmap.Config.ARGB_8888);
|
|
60
167
|
Utils.matToBitmap(mat, bitmap);
|
|
61
168
|
|
|
169
|
+
/* Display the result onto ImageView */
|
|
62
170
|
runOnUiThread(new Runnable() {
|
|
63
171
|
@Override
|
|
64
172
|
public void run() {
|
|
65
173
|
imageView.setImageBitmap(bitmap);
|
|
66
174
|
}
|
|
67
175
|
});
|
|
176
|
+
|
|
177
|
+
/* Close the image otherwise, this function is not called next time */
|
|
68
178
|
image.close();
|
|
69
179
|
}
|
|
180
|
+
|
|
181
|
+
|
|
182
|
+
//NV21画像をOpenCVで使えるようにする(mat)
|
|
183
|
+
private Mat getMatFromImage(ImageProxy image) {
|
|
184
|
+
/* https://stackoverflow.com/questions/30510928/convert-android-camera2-api-yuv-420-888-to-rgb */
|
|
185
|
+
ByteBuffer yBuffer = image.getPlanes()[0].getBuffer();
|
|
186
|
+
ByteBuffer uBuffer = image.getPlanes()[1].getBuffer();
|
|
187
|
+
ByteBuffer vBuffer = image.getPlanes()[2].getBuffer();
|
|
188
|
+
int ySize = yBuffer.remaining();
|
|
189
|
+
int uSize = uBuffer.remaining();
|
|
190
|
+
int vSize = vBuffer.remaining();
|
|
191
|
+
byte[] nv21 = new byte[ySize + uSize + vSize];
|
|
192
|
+
yBuffer.get(nv21, 0, ySize);
|
|
193
|
+
vBuffer.get(nv21, ySize, vSize);
|
|
194
|
+
uBuffer.get(nv21, ySize + vSize, uSize);
|
|
195
|
+
Mat yuv = new Mat(image.getHeight() + image.getHeight() / 2, image.getWidth(), CvType.CV_8UC1);
|
|
196
|
+
yuv.put(0, 0, nv21);
|
|
197
|
+
Mat mat = new Mat();
|
|
198
|
+
Imgproc.cvtColor(yuv, mat, Imgproc.COLOR_YUV2RGB_NV21, 3);
|
|
199
|
+
return mat;
|
|
200
|
+
}
|
|
201
|
+
|
|
202
|
+
private Mat fixMatRotation(Mat matOrg) {
|
|
203
|
+
Mat mat;
|
|
204
|
+
switch (previewView.getDisplay().getRotation()){
|
|
205
|
+
default:
|
|
206
|
+
case Surface.ROTATION_0:
|
|
207
|
+
mat = new Mat(matOrg.cols(), matOrg.rows(), matOrg.type());
|
|
208
|
+
Core.transpose(matOrg, mat);
|
|
209
|
+
Core.flip(mat, mat, 1);
|
|
210
|
+
break;
|
|
211
|
+
case Surface.ROTATION_90:
|
|
212
|
+
mat = matOrg;
|
|
213
|
+
break;
|
|
214
|
+
case Surface.ROTATION_270:
|
|
215
|
+
mat = matOrg;
|
|
216
|
+
Core.flip(mat, mat, -1);
|
|
217
|
+
break;
|
|
218
|
+
}
|
|
219
|
+
return mat;
|
|
220
|
+
}
|
|
221
|
+
}
|
|
222
|
+
|
|
223
|
+
private boolean checkPermissions(){
|
|
224
|
+
for(String permission : REQUIRED_PERMISSIONS){
|
|
225
|
+
if(ContextCompat.checkSelfPermission(this, permission) != PackageManager.PERMISSION_GRANTED){
|
|
226
|
+
return false;
|
|
227
|
+
}
|
|
228
|
+
}
|
|
229
|
+
return true;
|
|
230
|
+
}
|
|
231
|
+
|
|
232
|
+
@Override
|
|
233
|
+
public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
|
|
234
|
+
// super.onRequestPermissionsResult(requestCode, permissions, grantResults);
|
|
235
|
+
super.onRequestPermissionsResult(requestCode, permissions, grantResults);
|
|
236
|
+
if (requestCode == REQUEST_CODE_FOR_PREMISSIONS){
|
|
237
|
+
if (checkPermissions()) {
|
|
238
|
+
startCamera();
|
|
239
|
+
} else {
|
|
240
|
+
Log.i(TAG, "[onRequestPermissionsResult] Failed to get permissions");
|
|
241
|
+
this.finish();
|
|
242
|
+
}
|
|
243
|
+
}
|
|
244
|
+
}
|
|
245
|
+
}
|
|
70
246
|
```
|
|
71
247
|
|
|
72
248
|
### 試したこと
|
2
誤字
test
CHANGED
|
File without changes
|
test
CHANGED
|
@@ -70,7 +70,8 @@
|
|
|
70
70
|
```
|
|
71
71
|
|
|
72
72
|
### 試したこと
|
|
73
|
-
fi
|
|
73
|
+
fixmatの要素を取得したところ、type = 16, depth = 0, channels = 3, isContinuous = trueが返ってきました。
|
|
74
|
+
ビット深度はCV_8U, チャンネル数が3のカラー画像です。
|
|
74
75
|
|
|
75
76
|
グレースケール画像では正常に表示されるので、
|
|
76
77
|
NV21→RGB(Mat型)→RGB2GRAY→GRA2RGB(BGRも試しました)→Bitmapに変換
|
1
ソースコードの追加
test
CHANGED
|
@@ -1 +1 @@
|
|
|
1
|
-
MatからBitMapに変換した画像が正常に表示されない
|
|
1
|
+
[Java]MatからBitMapに変換した画像が正常に表示されない
|
test
CHANGED
|
@@ -51,10 +51,11 @@
|
|
|
51
51
|
mat.put(i,j,data);
|
|
52
52
|
}
|
|
53
53
|
}
|
|
54
|
-
//試したこと
|
|
54
|
+
//試したこと
|
|
55
|
+
Imgproc.cvtColor(mat,mat,Imgproc.COLOR_RGB2GRAY);
|
|
56
|
+
Imgproc.cvtColor(mat,mat,Imgproc.COLOR_GRAY2BGR);
|
|
55
57
|
|
|
56
58
|
/* mat -> bitmap */
|
|
57
|
-
//試したこと①
|
|
58
59
|
Bitmap bitmap = Bitmap.createBitmap(mat.cols(), mat.rows(),Bitmap.Config.ARGB_8888);
|
|
59
60
|
Utils.matToBitmap(mat, bitmap);
|
|
60
61
|
|
|
@@ -71,12 +72,6 @@
|
|
|
71
72
|
### 試したこと
|
|
72
73
|
fitmatの要素を取得したところ、type = 16, depth = 0, channels = 3, isContinuous = trueが返ってきました。
|
|
73
74
|
|
|
74
|
-
試したこと①
|
|
75
|
-
createBitmapの設定が間違えているのかと思い、ARGB_8888からいろいろな設定に変更しました。
|
|
76
|
-
その結果、ARGB_8888とRGB_565は実行できるものの色は画像の通り赤と緑でおかしくなり、
|
|
77
|
-
ALPHA_8,RGBA_1010102,RGBA_F16ではそもそもアプリが起動せず落ちてしまいました。
|
|
78
|
-
|
|
79
|
-
試したこと②
|
|
80
75
|
グレースケール画像では正常に表示されるので、
|
|
81
76
|
NV21→RGB(Mat型)→RGB2GRAY→GRA2RGB(BGRも試しました)→Bitmapに変換
|
|
82
77
|
という流れでカラーにしようと思ったのですが表示されるのはグレースケール画像でカラーに戻りませんでした。
|