decodeCurved method
Decodes QR code on a curved surface in image once it's found by the detect() method.
Returns UTF8-encoded output string or empty string if the code cannot be decoded.
https://docs.opencv.org/4.x/de/dc3/classcv_1_1QRCodeDetector.html#ac7e9526c748b04186a6aa179f56096cf
Implementation
(String rval, Mat straightQRcode) decodeCurved(
InputArray img,
VecPoint points, {
OutputArray? straightQRcode,
}) {
final s = straightQRcode?.ptr ?? calloc<cvg.Mat>();
final v = calloc<ffi.Pointer<ffi.Char>>();
cvRun(() => cffi.QRCodeDetector_decodeCurved(ref, img.ref, points.ref, s, v));
final ss = v.value.cast<Utf8>().toDartString();
calloc.free(v);
return (ss, Mat.fromPointer(s));
}