Items of a Processing Pipeline
In , an image processing pipeline is described as a sequence of items separated by the space character. Such items are interpreted and executed from the left to the right. For instance, the expression:
filename.jpg blur 3,0 sharpen 10 resize 200%,200% output file_out.jpg
defines a valid pipeline composed of nine
Each item is a string that is either a command, a list of command arguments, a filename or a special input string.
Escape characters \ and double quotes " can be used to define items containing spaces or other special characters. For instance, the two strings single\ item and "single item" both define the same single item, with a space in it.