Verbose mode (show progress). Enables printout of running scan lines.

Only one file in the format of RGBRGB... triplets (Each of R, G,B is a byte) is being written. This file size is 3 * Width * Height. If stdout is used for output, this option is implicitly applied. The default (if not `-1') is 3 files with the names OutFileName.R, OutFileName.G, OutFileName.B, each of which is Width * Height bytes.

specifies the name of the out file (see also `-1' above).

Print one line of command line help, similar to Usage above.