To execute a user--written MIDAS application program (coded in FORTRAN or C),
employ the
command RUN. The command RUN MYPROG or RUN myprog
will execute myprog.exe in a subprocess like any other MIDAS
command.
It is better practice to embed the command RUN MYPROG
in a MIDAS
command procedure. Typical tasks of this procedure would be to provide
default values for all parameters , to check the validity of parameter values,
and to store the parameters into the keywords your program will use.
Let us assume you have written your special filter program and stored the
executable module as
bestfilt.exe on disk. Program bestfilt just needs the names of
the input and output image
which are obtained inside the program from the keywords IN_A and OUT_A .
The following MIDAS procedure:
!+
! MIDAS procedure bestfilt.prg
!+
CROSSREF INPUT RESULT
DEFINE/PARAMETER P1 ? IMA "Enter input frame: "
DEFINE/PARAMETER P2 ? IMA "Enter output frame: "
DEFINE/MAXPAR 2 ! max. 2 parameters expected
!
WRITE/KEYWORD IN_AP1
WRITE/KEYWORD OUT_AP2
RUN BESTFILT ! .exe is the default type
will check, that the two parameters are valid MIDAS file names and prompt for input if any parameter is not given. Together with the MIDAS command
CREATE/COMMAND BESTFILT/IMAGE @@ bestfilt
your application will then be integrated smoothly into MIDAS.
Now, you can apply your own filtering algorithm to the image lobo.bdf
by typing e.g.
BESTFILT/IMAGE res=perrito in=lobo.