The following formula describes the approximate amount of memory used by GeoExpress to compress a single image to the MrSID Generation 4 (MG4) or MrSID Generation 3 (MG3) format:
Memory = ((8 + 4 * BlockSize + MIN(StripHeight, BlockSize)) * 4 + StripHeight) * NumBands * Width
The following list describes the variables used by the formula:
Memory is the estimated memory usage in bytes.BlockSize is set by the user on the Format-Specific tab of the Advanced Job Options dialog box. For more information on block size, see Block Size.
MIN(StripHeight, BlockSize) evaluates the values for the strip height and block size and equals whichever value is smaller.StripHeight is set by the user on the Format-Specific tab of the Advanced Job Options dialog box. For more information on strip height, see Strip Height.
NumBands is the number of bands in the image to be encoded – typically 1 or 3 (This value is noted in the Properties tab.)
Width is the width of the input image in pixels. (This value is noted in the Properties tab.)