public void cuda_pyrdown_pyrup()
{
using (GpuMat src = new GpuMat(100, 100, MatType.CV_8UC1))
using (GpuMat dst = new GpuMat()) {
src.SetTo(Scalar.Black);
Cuda.cuda.pyrDown(src, src);
Cuda.cuda.pyrUp(src, dst);
ShowImagesWhenDebugMode(src, dst);
Assert.Equal(0, Cuda.cuda.CountNonZero(dst));
}
}