MATLAB CVIP Toolbox Functions
Arithmetic and Logic Functions
Functions for the application of arithmetic and logic operations to
images are contained in this category. These functions require one or two
images as input and they all return an image. Related functions,
specifically multiplication functions that perform gray-level mapping,
are in the histogram category. Included here are arithmetic functions to
add, subtract, multiply, divide as well as logic functions AND, OR, XOR
and NOT. The arithmetic functions will convert any image data to double
precision floating point data before performing the operation, and return
double precision floating point data. The logic functions will convert
any input images to 8-bit or 16-bit unsigned integer data, by linear
remapping if necessary, before the operation is performed. They will then
perform the logic operation and return an image of type 8-bit or 16-bit
unsigned integer. If the images are of different size the upper left
corner will be aligned at the (1,1) location (note: this corresponds to
the (0,0) location in the C programming language) and the smaller image
will be zero padded before the operation is performed. If the images have
a different number of bands, the single band image will have that band
repeated to perform the operation.
- add_cvip - add two images, or add a constant to an image
- and_cvip - perform a logical AND on two images
- divide_cvip - divide one image by another, or divide an image by a constant
- multiply_cvip - multiply two images, or multiply an image by a constant
- not_cvip - perform a logical NOT on an image
- or_cvip - perform a logical OR on two images
- subtract_cvip - subtract one image from another, or subtract a constant from an image
- xor_cvip - perform a logical XOR on two images