f3d (Format 3 Dimensional) is a simple format for storage of 3D datasets supporting different voxel types (8, 16, 32 bit signed/unsigned integers and 32 bit floats) and different grids (cartesian, regular, rectilinear). It does not support curvilinear and unstructured grids.
The package includes implementation of various filters for volume data processing. It supports SSE computation and execution on GPU using OpenGL and CUDA.