Introduction to Image Arithmetic

An ``image'' may be either a 2-D image array or a 1-D spectrum vector. The commands for one- or two-image arithmetic are:

ADD
add two images or an image and a constant.
SUBTRACT
subtract two images or subtract a constant and a image.
MULTIPLY
multiply two images or an image and a constant
DIVIDE
divide two images or divide an image by a constant.
SQRT
square root
LOG
base-10 logarithm
LN
natural logarithm
EXP
exponentiate image (eîmage): LOG INV does 10îmage
TAN
tangent
ARCTAN
inverse of TAN
SIN
sine
COS
cosine
NINT
nearest integer
ONEOVER
invert (1/x)