This program corrects image data which is byte swapped.
Some computers use different byte ordering than others.
When images are transferred from one computer to another with different byte ordering, the DNs in the image will not be correct. SWAP can be used to correct this problem. A 16-bit image which is byte swapped will look unrecognizable. If data is moved from an LSB machine to an MSB machine and vice versa, byte ordering problems may be experienced. This parameter is used to specify the number of bytes to swap, either 2 or 4.