** Constant Arithmetic **

+ x

    Adds x to the data in the current image data buffer.

- x

    Subtracts x from the data in the current image data buffer.

* x

    Multiplies the data in the current image data buffer by x.

/ x

    Divides the data in the current image data buffer by x.

+RGB x y z

    Add x to the red, y to the green, and z to the blue part of the current (assumed RGB) image in the buffer.

   

-RGB x y z

    Subtract x from the red, y from the green, and z from the blue part of the current (assumed RGB) image in the buffer.

   

*RGB x y z

    For the current (assumed RGB) image in the buffer, multiply the red part by x, the green part by y, and the blue part by z.

   

/RGB x y z

    For the current (assumed RGB) image in the buffer, divide the red part by x, the green part by y, and the blue part by z.

** File and Temporary Image Arithmetic **

ADDFILE filename

    Adds the contents of an OMA file of a given name to the data in the current image data buffer.

DIVFILE filename

    Divides the data in the current buffer by the contents of the specified file.

MULFILE filename

    Multiplies the contents of the current data buffer by the contents of the specified file.

SUBFILE filename

    Subtracts the contents of the specified file from the data in the current buffer.

ADDTMP n

    Adds the contents of temporary image n to the data in the current image data buffer.

DIVTMP n

    Divides the data in the current buffer by the contents of temporary image n.

MULTMP n

    Multiplies the contents of the current data buffer by the contents of temporary image n.

SUBTMP n

    Subtracts the contents of temporary image n from the data in the current buffer.

** Accumulator Arithmetic **

ACCUMULATE

    Allocates and clears memory for a 32-bit image accumulator buffer that can be used to sum individual images. The size of the accumulator is determined by the scan parameters when the accumulate command is first given.

ACADD

    Adds the current image data buffer to the accumulator buffer.

ACGET

    Moves the data from the accumulator buffer into the current image data area. The previous contents of the image data buffer are destroyed.

ACDELETE

    Frees the memory associated with the accumulator.

** Variables and Simple Arithmetic **

VARIABLES

    Lists currently defined variables and their values. Variables are defined using simple arithmetic expressions, such as

    my_var = 10

    or

    y = my_var*2

    The values of variables are accessed from other commands using @my_var. For example,

    + @my_var

    or

    save datfile_@4myvar

    As with loops, the end of a variable can be tagged by adding a '\' For example,

    save datfile_@my_var\_corrected

    See also commands FLOAT and INTVARIABLE

FLOAT variable_name

    Specifies that variable_name is to be used as a floating point variable.

INTVARIABLE variable_name

    Specifies that variable_name is to be used as an integer variable.