powAsync function
Pow raises every array element to a power.
For further details, please see: https://docs.opencv.org/master/d2/de8/group__core__array.html#gaf0d056b5bd1dc92500d6f6cf6bac41ef
Implementation
Future<Mat> powAsync(InputArray src, double power) async =>
cvRunAsync((callback) => ccore.core_Pow_Async(src.ref, power, callback), matCompleter);