On the image is the one possibility of distribution of this error information. But almost m and n are odd integers. Matrix A is an normal convolutory matrix. This process I will name 3D-Dithering. First step of decompression is decoding compressed data with used lossless compression method.
Last step is reconstruction of dithered picture.
This process I will name 3D-UnDithering. If original voxel intenzity is and dithered voxel intensity of the same voxel is , we can defined, that . On the image is the one possibility of distribution of this error information. This feature minimalized a level of degradation an information at reduction intensity. For good reconstruction of dithered information we can use one of the methods described below.