OpenLB – Open Source Lattice Boltzmann Code › Forums › on OpenLB › General Topics › Read from segmented binary mask › Reply To: Read from segmented binary mask August 1, 2019 at 4:15 pm #4490 mathiasKeymaster Vti is an image, i.e. voxel, format. Please see vtk toolkit for more information and check out the openlb reader interfaces in the folder io.