InputImage.kt

val image = InputImage.fromByteArray(
                bitmap?.bitmapToNV21ByteArray()!!,
                bitmap!!.width,
                bitmap!!.height,
                screenOrientation,
                InputImage.IMAGE_FORMAT_NV21
            )
faceDetector.process(image).addOnSuccessListener { image -> 
  // Continue processing here, 
  // including Cropping image from BoundingBox (which available inside `image` Object above)
}