This allows the user to specify a multiplier, M, a divisor, D, and an Offset value which is applied to rescale the voxel values as follows: New voxel value = (Voxval x M)/D + Offset.

Sometimes called linear remapping, rescaling involves changing the values in an image using a linear equation. Each value in the image is multiplied by a constant; then a second constant is added to the product. Rescaling is useful for mapping the values in an image from one range to another.

the process of compressing data from one format to another. In ERDAS IMAGINE this typically means compressing a 16-bit file to an 8-bit file.