meanAsync method
Implementation
Future<Scalar> meanAsync({Mat? mask}) async {
final s = calloc<cvg.Scalar>();
return cvRunAsync0<Scalar>((callback) {
return mask == null
? ccore.cv_Mat_mean(ref, s, callback)
: ccore.cv_Mat_mean_1(ref, mask.ref, s, callback);
}, (c) => c.complete(Scalar.fromPointer(s)));
}