blobFromImage function

Mat blobFromImage(InputArray image, { double scalefactor = 1.0, Size? size, Scalar? mean, bool swapRB = false, bool crop = false, int ddepth = MatType.CV_32F, })

Creates 4-dimensional blob from image. Optionally resizes and crops image from center, subtract mean values, scales values by scalefactor, swap Blue and Red channels.

For further details, please see: https://docs.opencv.org/4.x/d6/d0f/group__dnn.html#ga29f34df9376379a603acd8df581ac8d7

Implementation

Mat blobFromImage(
  InputArray image, {
  double scalefactor = 1.0,
  Size? size,
  Scalar? mean,
  bool swapRB = false,
  bool crop = false,
  int ddepth = MatType.CV_32F,
}) {
  return using<Mat>((arena) {
    size ??= (0, 0);
    mean ??= Scalar.zeros;
    final _ptr = _bindings.Net_BlobFromImage(
      image.ptr,
      scalefactor,
      size!.toSize(arena).ref,
      mean!.ref,
      swapRB,
      crop,
      ddepth,
    );
    return Mat.fromCMat(_ptr);
  });
}