Hello,

i want to multiply either a vector with a single scalar (`s * {v_0,...,v_n} = {s * v_0,...,s * v_n}`

) or a elementwise multiplication of two vectors (`{w_0,...,w_n} * {v_0,...,v_n} = {w_0 * v_0,..., w_n * v_n}`

).

This operation shall be apply to an image of vectors.

The obvious choice would be the MultiplyImageFilter but once template it over a VectorImage the constant has to be a vector.

This example does not work because `factor`

is not a vector:

```
auto multiply = itk::MultiplyImageFilter<VectorImageType>::New();
multiply->SetInput(vectorImage);
multiply->SetConstant(factor);
```

This does not work either:

```
auto multiply = itk::MultiplyImageFilter<VectorImageType>::New();
itk::Image<itk::CovariantVector<double, 3>, 3>::PixelType factor;
factor.Fill(1);
factor[2] = 100;
multiply->SetInput(vectorImage);
multiply->SetConstant(factor);
```

All the output values are multiplied as a vector multiplication.

Is there a filter I have not considered because its not obvious?

Is this type of operation done by an accessor or castimage filter?

Thanks,

Gordian