Phân đoạn đối tượng bằng Bộ công cụ học máy dành cho Android

private class YourImageAnalyzer : ImageAnalysis.Analyzer {

    override fun analyze(imageProxy: ImageProxy) {
        val mediaImage = imageProxy.image
        if (mediaImage != null) {
            val image = InputImage.fromMediaImage(mediaImage, imageProxy.imageInfo.rotationDegrees)
            // Pass image to an ML Kit Vision API
            // ...
        }
    }
}

private class YourAnalyzer implements ImageAnalysis.Analyzer {

    @Override
    public void analyze(ImageProxy imageProxy) {
        Image mediaImage = imageProxy.getImage();
        if (mediaImage != null) {
          InputImage image =
                InputImage.fromMediaImage(mediaImage, imageProxy.getImageInfo().getRotationDegrees());
          // Pass image to an ML Kit Vision API
          // ...
        }
    }
}

private val ORIENTATIONS = SparseIntArray()

init {
    ORIENTATIONS.append(Surface.ROTATION_0, 0)
    ORIENTATIONS.append(Surface.ROTATION_90, 90)
    ORIENTATIONS.append(Surface.ROTATION_180, 180)
    ORIENTATIONS.append(Surface.ROTATION_270, 270)
}

/**
 * Get the angle by which an image must be rotated given the device's current
 * orientation.
 */
@RequiresApi(api = Build.VERSION_CODES.LOLLIPOP)
@Throws(CameraAccessException::class)
private fun getRotationCompensation(cameraId: String, activity: Activity, isFrontFacing: Boolean): Int {
    // Get the device's current rotation relative to its "native" orientation.
    // Then, from the ORIENTATIONS table, look up the angle the image must be
    // rotated to compensate for the device's rotation.
    val deviceRotation = activity.windowManager.defaultDisplay.rotation
    var rotationCompensation = ORIENTATIONS.get(deviceRotation)

    // Get the device's sensor orientation.
    val cameraManager = activity.getSystemService(CAMERA_SERVICE) as CameraManager
    val sensorOrientation = cameraManager
            .getCameraCharacteristics(cameraId)
            .get(CameraCharacteristics.SENSOR_ORIENTATION)!!

    if (isFrontFacing) {
        rotationCompensation = (sensorOrientation + rotationCompensation) % 360
    } else { // back-facing
        rotationCompensation = (sensorOrientation - rotationCompensation + 360) % 360
    }
    return rotationCompensation
}
MLKitVisionImage.kt

private static final SparseIntArray ORIENTATIONS = new SparseIntArray();
static {
    ORIENTATIONS.append(Surface.ROTATION_0, 0);
    ORIENTATIONS.append(Surface.ROTATION_90, 90);
    ORIENTATIONS.append(Surface.ROTATION_180, 180);
    ORIENTATIONS.append(Surface.ROTATION_270, 270);
}

/**
 * Get the angle by which an image must be rotated given the device's current
 * orientation.
 */
@RequiresApi(api = Build.VERSION_CODES.LOLLIPOP)
private int getRotationCompensation(String cameraId, Activity activity, boolean isFrontFacing)
        throws CameraAccessException {
    // Get the device's current rotation relative to its "native" orientation.
    // Then, from the ORIENTATIONS table, look up the angle the image must be
    // rotated to compensate for the device's rotation.
    int deviceRotation = activity.getWindowManager().getDefaultDisplay().getRotation();
    int rotationCompensation = ORIENTATIONS.get(deviceRotation);

    // Get the device's sensor orientation.
    CameraManager cameraManager = (CameraManager) activity.getSystemService(CAMERA_SERVICE);
    int sensorOrientation = cameraManager
            .getCameraCharacteristics(cameraId)
            .get(CameraCharacteristics.SENSOR_ORIENTATION);

    if (isFrontFacing) {
        rotationCompensation = (sensorOrientation + rotationCompensation) % 360;
    } else { // back-facing
        rotationCompensation = (sensorOrientation - rotationCompensation + 360) % 360;
    }
    return rotationCompensation;
}

val image = InputImage.fromMediaImage(mediaImage, rotation)
MLKitVisionImage.kt

val image: InputImage
try {
    image = InputImage.fromFilePath(context, uri)
} catch (e: IOException) {
    e.printStackTrace()
}
MLKitVisionImage.kt

val image = InputImage.fromByteBuffer(
        byteBuffer,
        /* image width */ 480,
        /* image height */ 360,
        rotationDegrees,
        InputImage.IMAGE_FORMAT_NV21 // or IMAGE_FORMAT_YV12
)
MLKitVisionImage.kt
// Or:
val image = InputImage.fromByteArray(
        byteArray,
        /* image width */ 480,
        /* image height */ 360,
        rotationDegrees,
        InputImage.IMAGE_FORMAT_NV21 // or IMAGE_FORMAT_YV12
)
MLKitVisionImage.kt

InputImage image = InputImage.fromByteBuffer(byteBuffer,
        /* image width */ 480,
        /* image height */ 360,
        rotationDegrees,
        InputImage.IMAGE_FORMAT_NV21 // or IMAGE_FORMAT_YV12
);
MLKitVisionImage.java
// Or:
InputImage image = InputImage.fromByteArray(
        byteArray,
        /* image width */480,
        /* image height */360,
        rotation,
        InputImage.IMAGE_FORMAT_NV21 // or IMAGE_FORMAT_YV12
);
MLKitVisionImage.java

val image = InputImage.fromBitmap(bitmap, 0)
MLKitVisionImage.kt

val options = SubjectSegmenterOptions.Builder()
       // enable options
       .build()

SubjectSegmenterOptions options = new SubjectSegmenterOptions.Builder()
        // enable options
        .build();

val options = SubjectSegmenterOptions.Builder()
        .enableForegroundConfidenceMask()
        .build()

SubjectSegmenterOptions options = new SubjectSegmenterOptions.Builder()
        .enableForegroundConfidenceMask()
        .build();

val options = SubjectSegmenterOptions.Builder()
        .enableForegroundBitmap()
        .build()

SubjectSegmenterOptions options = new SubjectSegmenterOptions.Builder()
        .enableForegroundBitmap()
        .build();

val subjectResultOptions = SubjectSegmenterOptions.SubjectResultOptions.Builder()
    .enableConfidenceMask()
    .build()

val options = SubjectSegmenterOptions.Builder()
    .enableMultipleSubjects(subjectResultOptions)
    .build()

SubjectResultOptions subjectResultOptions =
        new SubjectSegmenterOptions.SubjectResultOptions.Builder()
            .enableConfidenceMask()
            .build()

SubjectSegmenterOptions options = new SubjectSegmenterOptions.Builder()
      .enableMultipleSubjects(subjectResultOptions)
      .build()

val subjectResultOptions = SubjectSegmenterOptions.SubjectResultOptions.Builder()
    .enableSubjectBitmap()
    .build()

val options = SubjectSegmenterOptions.Builder()
    .enableMultipleSubjects(subjectResultOptions)
    .build()

SubjectResultOptions subjectResultOptions =
      new SubjectSegmenterOptions.SubjectResultOptions.Builder()
        .enableSubjectBitmap()
        .build()

SubjectSegmenterOptions options = new SubjectSegmenterOptions.Builder()
      .enableMultipleSubjects(subjectResultOptions)
      .build()

val segmenter = SubjectSegmentation.getClient(options)

SubjectSegmenter segmenter = SubjectSegmentation.getClient(options);

segmenter.process(inputImage)
    .addOnSuccessListener { result ->
        // Task completed successfully
        // ...
    }
    .addOnFailureListener { e ->
        // Task failed with an exception
        // ...
    }

segmenter.process(inputImage)
    .addOnSuccessListener(new OnSuccessListener() {
            @Override
            public void onSuccess(SubjectSegmentationResult result) {
                // Task completed successfully
                // ...
            }
        })
        .addOnFailureListener(new OnFailureListener() {
            @Override
            public void onFailure(@NonNull Exception e) {
                // Task failed with an exception
                // ...
            }
        });

val colors = IntArray(image.width * image.height)

val foregroundMask = result.foregroundConfidenceMask
for (i in 0 until image.width * image.height) {
  if (foregroundMask[i] > 0.5f) {
    colors[i] = Color.argb(128, 255, 0, 255)
  }
}

val bitmapMask = Bitmap.createBitmap(
  colors, image.width, image.height, Bitmap.Config.ARGB_8888
)

int[] colors = new int[image.getWidth() * image.getHeight()];

FloatBuffer foregroundMask = result.getForegroundConfidenceMask();
for (int i = 0; i < image.getWidth() * image.getHeight(); i++) {
  if (foregroundMask.get() > 0.5f) {
    colors[i] = Color.argb(128, 255, 0, 255);
  }
}

Bitmap bitmapMask = Bitmap.createBitmap(
      colors, image.getWidth(), image.getHeight(), Bitmap.Config.ARGB_8888
);

val foregroundBitmap = result.foregroundBitmap

Bitmap foregroundBitmap = result.getForegroundBitmap();

val subjects = result.subjects

val colors = IntArray(image.width * image.height)
for (subject in subjects) {
  val mask = subject.confidenceMask
  for (i in 0 until subject.width * subject.height) {
    val confidence = mask[i]
    if (confidence > 0.5f) {
      colors[image.width * (subject.startY - 1) + subject.startX] =
          Color.argb(128, 255, 0, 255)
    }
  }
}

val bitmapMask = Bitmap.createBitmap(
  colors, image.width, image.height, Bitmap.Config.ARGB_8888
)

List subjects = result.getSubjects();

int[] colors = new int[image.getWidth() * image.getHeight()];
for (Subject subject : subjects) {
  FloatBuffer mask = subject.getConfidenceMask();
  for (int i = 0; i < subject.getWidth() * subject.getHeight(); i++) {
    float confidence = mask.get();
    if (confidence > 0.5f) {
      colors[width * (subject.getStartY() - 1) + subject.getStartX()]
          = Color.argb(128, 255, 0, 255);
    }
  }
}

Bitmap bitmapMask = Bitmap.createBitmap(
  colors, image.width, image.height, Bitmap.Config.ARGB_8888
);

val bitmaps = mutableListOf()
for (subject in subjects) {
  bitmaps.add(subject.bitmap)
}

List bitmaps = new ArrayList<>();
for (Subject subject : subjects) {
  bitmaps.add(subject.getBitmap());
}