Face detectors

abstract suspend fun getCroppedFace(imageUri: Uri): Result<Bitmap>

abstract suspend fun getAllCroppedFaces(frameBitmap: Bitmap): List<Pair<Bitmap, Rect>>

protected fun getBitmapFromUri(context: Context, imageUri: Uri): Bitmap?

protected fun validateRect(cameraFrameBitmap: Bitmap, boundingBox: Rect): Boolean

protected fun rotateBitmap(source: Bitmap, degrees: Float): Bitmap

MLKitFaceDetector(context: Context)

val mlKitDetector = MLKitFaceDetector(context)

// Detect single face from image URI
val result = mlKitDetector.getCroppedFace(imageUri)
if (result.isSuccess) {
    val croppedFace = result.getOrNull()!!
    // Process cropped face
}

// Detect multiple faces from camera frame
val faces = mlKitDetector.getAllCroppedFaces(frameBitmap)
for ((croppedFace, boundingBox) in faces) {
    // Process each detected face
}

MediapipeFaceDetector(context: Context)

val mediapipeDetector = MediapipeFaceDetector(context)

// Detect single face from image URI
val result = mediapipeDetector.getCroppedFace(imageUri)
when {
    result.isSuccess -> {
        val croppedFace = result.getOrNull()!!
        // Generate face embedding
    }
    result.exceptionOrNull() is AppException -> {
        val error = result.exceptionOrNull() as AppException
        when (error.errorCode) {
            ErrorCode.NO_FACE -> // Handle no face
            ErrorCode.MULTIPLE_FACES -> // Handle multiple faces
            else -> // Handle other errors
        }
    }
}

// Detect all faces for recognition
val faces = mediapipeDetector.getAllCroppedFaces(frameBitmap)
for ((croppedFace, boundingBox) in faces) {
    val embedding = faceNet.getFaceEmbedding(croppedFace)
    // Perform face recognition
}