Flowcharts

Flowcharts consist of a collection of the geometrically-shaped modules. Together, they can execute a Star module several times on different images. Every flowchart begins with the “start” module and ends with the “end” module. In between, there is at least one “exec” module. To set the arguments of these modules, you left-click inside them to bring up their argument dialog boxes, as you do with any module. Attached to the “exec” module is a Star module that will be executed by the flowchart. This Star module contains dynamic variables that will be filled in by the flowchart. The “start” module defines the starting directory. It passes this name to the next module, “ls”.

The “ls” module takes that directory name and, according to its arguments, looks for files on that directory that match a filter, in this case, “*.tif”. The “ls” module then passes the directory name and each filename (that matches the filter), one at a time. If 5 names match the filter, then the directory name and a file name are passed to “exec” 5 different times.

The “exec” module takes the directory and file names and substitutes them into the dynamic variables (pg. 18) of the Star module attached to it, according to the instruction in its arguments. Here it gives the filename to Show as a title and the directory/filename to ReadImage.