.LP
These routines use one image to produce a single output image.
The operations performed are arithmetic point operations done on a
pixel by pixel basis.  Several of the operations may be used with
an optional masking image.
.SH
SHORT DESCRIPTION OF ROUTINES
.IP "Absolute Value -" 20
Compute the absolute value of an image pixel by pixel.
.IP "Logarithm -" 20
Compute the logarithm of an image pixel by pixel.
.IP "Exponential -" 20
Compute the base 10 antilogarithm of an image with an operation
gating image.
.IP "Square Root -" 20
Compute the square root of an image pixel by pixel.
.IP "Offset -" 20
Add a specified offset to each pixel in the input image.
.IP "Scale -" 20
Multiply (scale) an image by a constant.
.IP "Normalize -" 20
Normalize an image, forcing the pixel values to lie within a
specified range.
.IP "Not -" 20
Compliment an image by subtracting pixel values from a constant.
.IP "Invert -" 20
Inverts the gray-levels of a  BYTE type image.
.IP "Floor -" 20
Clip the lowest levels of an image to a constant value.
.IP "Substitute -" 20
Substitute the value of a pixel for another value.
.IP "Clip -" 20
Clip the grange of gray level values.
.IP "Conjugate -" 20
Complex conjugate an image pixel by pixel.
