process

PROCESS

Purpose: Performs high speed calculations on image files.

Format:   PROCESS BEGIN
                    statement
                    statement
                    . . . . .
                    statement
                 PROCESS END

Notes: The PROCESS statement performs groups of calculations for each sequential pixel specified by the INFILE(s) statement. The results for each pixel processed are available for output to the user selected OUTFILE image files via the OUT variable. Only mathematical calculations, IF...ENDIF statements and LOOP BEGIN...END statements are executed within a PROCESS. Each group of statements are executed once for each pixel. The PROCESS BEGIN statement opens the specified input and output files and initializes the internal process variables. After all iterations have been executed, the files are then closed and related system variables are re-initialized. The following variables have special meaning within a process loop. They are as follows:

**Process Loop Variables**
*Description*	*Variable Name*
Image dimensions and types	See: Infile
Current pixel value imported from INFILE_A. Current pixel value imported from INFILE_B. Current pixel value imported from INFILE_C. Current pixel value imported from INFILE_D. Current pixel value imported from INFILE_E. Current pixel value imported from INFILE_F. Current pixel value imported from INFILE_G. Current pixel value imported from INFILE_H.	INA INB INC IND INE INF ING INH
The value exported to the output file(s).	OUT
The current X or horizontal pixel location.	XPOS
The current Y or vertical pixel location.	YPOS
The red intensity value.	RED
The green intensity value.	GREEN
The blue intensity value.	BLUE
The scaled range of the OUT variable to graphic files.	WINDOW
Represents the center of the WINDOW range.	LEVEL