SHORT DESCRIPTION OF V3DTOOLS vinter - 3D Slice Interpolation Interpolation between slices in a multiband image vexpand3d - Voxel replication Expand the volume in the three directions x, y, z vzbuff - Compute the zbuffer through a ray casting algorithm Given the projection view, and the volume data, outputs the z-buffer and optionally the voxel coordinates and values visnorm - Compute the normal from the zbuffer From the zbuffer, estimate the normals. This will gen- erate the so-called image space shading vvsnorm - Compute the normal from voxel space From the visible surface voxel coordinates and the volume data, estimates the surface normals to generate the so-called voxel space and object space shadings vvoxext - Show voxels from its coordinates From a 3-band coordinate file and a volume, creates a correspondent voxel image. This is useful to show vox- els at the surface specified by the 3-band coordinate file vtexture Add thickness to volume rendering vshad - Shade the output file from z-buffer Shading part of the ray-cast rendering algorithm vthresh3d - Threshold through bands Generate a multiband binary image from a multiband gray image vqmed3d - 3D median filter Do a median filter in a multiband image as 3D data vconv3d - 3D convolution Do a spatial periodic convolution of two multiband images as 3D data vfft3d - FFT 3D Radix 2 3D fft vmpp3d Log of Magnitude of fft3d vinsert3d - Insert a sub-volume image Insert, (erasing the local of insertion) a sub-volume image into a larger one vpad3d - Pad 3D Pad in a volume data vaband - Add or Append bands Insert a range of bands of an image into another vdband - Delete bands Remove a range of bands from an image vmband - Move bands within a multiband image Rearrange the bands within an image vmontage Create a montage image by placing bands side by side in rows and columns vplanexyz Extract 3 planes (constant x, y and z) from a 3D image vframe Create a byte frame volume vgauss3d - 3D gaussian image Generate a gaussian density distribution in a volume vimpul3d - volume with impulses Generate a volume data with impulses vorthog Create a 3D image containing 3 orthogonal planes