How to convert vtkimagedata of vtk.js to opencv.js Mat

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1

Like C++:
// vtkImageData==>Mat
cv::Mat vtkImage2Mat(vtkImageData *image)
{
int dim[3];
image->GetDimensions(dim);
int imgType=CV_8UC1;
if(image->GetNumberOfScalarComponents()==1)
imgType=CV_8UC1;
if(image->GetNumberOfScalarComponents()==3)
imgType=CV_8UC3;

cv::Mat matSrc(dim[1],dim[0],imgType,image->GetScalarPointer());

return matSrc;

}