phaseAsync function
Phase calculates the rotation angle of 2D vectors.
For further details, please see: https://docs.opencv.org/master/d2/de8/group__core__array.html#ga9db9ca9b4d81c3bde5677b8f64dc0137
Implementation
Future<Mat> phaseAsync(InputArray x, InputArray y, {bool angleInDegrees = false}) async =>
cvRunAsync((callback) => cffi.core_Phase_Async(x.ref, y.ref, angleInDegrees, callback), matCompleter);