
Originally Posted by
thorfdbg
Do you mean compression of 3D models/objects as used in computer graphics and 3D animation (i.e. meshes and textures), or do you mean volumetric images? For the latter case, such images appear in medical imaging, and there JPEG 2000 part 2 is applied, using a wavelet transformation in Z direction - actually a "disguised" color transformation. Additionally, JPEG 2000 had a part 10 that describes a dedicated 3D compression, but it never became very popular because it doesn't work much better than part 2. Improvements over slice-by-slice compression are typically not so large as most of the energy is already in the smallest LL band and decorrelation over the high-passes in Z direction does not deliver high returns.