The following functions are in the Matlab CVIP Toolbox, organized into categories based on the type of operation. This list contains a brief description of the functions. For more details, including examples and syntax for exact function, see the Matlab Help pages.

**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

**assemble_bands_cvip** - assembles
3-band image from 3 single-band images

**extract_band_cvip** - extracts one band from a 3-band image

**ccenhance_cvip** - color
contrast enhancement algorithm

**cct2rgb_cvip** - converts a color image from cylindrical coordinate
to RGB color space

**hsl2rgb_cvip** - converts a color image from hsl color space back to RGB color space

**hsv2rgb_cvip** - converts a color image from hsv color space back to RGB color space

**ipct_cvip** - performs the inverse
principal components transform in RGB-space

**lab2rgb_cvip** - converts a color image from CIE L*a*b* to RGB color
space

**luminance_cvip** - performs color
to luminance transform

**lum_average_cvip** - performs color
to monchrome transform using average of all bands

**luv2rgb_cvip** - converts a color image from CIE L*u*v* to RGB color
space

**pct_cvip** - performs the principal
components transform in RGB-space

**rgb2cct_cvip** - converts a color image from RGB to cylindrical
coordinate space

**rgb2hsl_cvip** - converts a color image from RGB to
Hue/Saturation/Lightness color space

**rgb2hsv_cvip** - converts a color image from RGB to Hue/Saturation/Value
color space

**rgb2lab_cvip** - converts a color image from RGB to CIE L*a*b* color
space

**rgb2luv_cvip **- converts a color image from RGB to CIE L*u*v* space

**rgb2sct_cvip** - converts a color image from RGB to spherical coordinate
space

**rgb2xyz_cvip** - converts a color image from RGB to CIE XYZ color space

**sct2rgb_cvip** - converts a color image from spherical coordinate space
to RGB color space

**bin2graycode_cvip** - converts natural binary code to gray code

**graycode2bin_cvip** - converts gray code to natural binary

**halftone_cvip** - convert image to binary with halftone technique

**vipmread_cvip** - read a CVIPtools vipm image file into MATLAB

**vipmwrite_cvip** - write a CVIPtools vipm image file to disk

**boiecox_ed_cvip** - perform a Boie-Cox edge detection on the image

**canny_ed_cvip** - perform a Canny
edge detection on the image

**cerchar_ed_cvip** - a spatial-multi
spectral image edge detection filter

**edge_link_cvip** - links edge
points into lines

**frei_chen_ed_cvip** - frei-chen filter, 9 basis image masks, edge/line subspace

**harris_corner_cvip** - a spatial
(corner detection) filter

**hough_line_cvip** - performs an hough transform, links specified
lines

**kirsch_ed_cvip** - perform kirsch
edge detection

**laplacian_ed_cvip** - performs a
Laplacian edge detection

**laplacian_gauss_ed_cvip** -
computes the Laplacian of a Gaussian edge detector

**marr_hildreth_ed_cvip** - performs
a Marr Hildreth edge detection on the image

**moravec_corner_cvip** - a spatial corner
detecting filter

**pratt_merit_cvip** - calculates
the Pratt Figure-of-Merit (FOM) for two binary images

**prewitt_ed_cvip** - perform prewitt edge detection

**pyramid_ed_cvip** - perform a
pyramid edge detection

**roberts_ed_cvip** - performs a
Roberts edge detection

**robinson_ed_cvip** - perform a
Robinson edge detection

**shen_castan_ed_cvip** - perform a
Shen-Castan edge detection on the image

**sobel_ed_cvip** - perform sobel edge detection

**copy_paste_cvip** - copies a subimage from one image and pastes it to another image

**crop_cvip** - crop
a subimage from an image

**enlarge_cvip**** **- enlarges image to a user-specified
size

**rotate_cvip**
- rotate the given image by an angle specified by the user (Range 1 ~ 360
degrees)

**shrink_cvip** - shrinks the given
image by a factor specified by the user (Range 0.1 ~ 1)

**spatial_quant_cvip**
- quantize an image by one of the following methods: average, median, or
decimation

**translate_cvip** - move the entire
image horizontally and/or vertically; also used for cut-and-paste of subimage

**zoom_cvip** - zoom the
given image by a factor specified by the user (Range 1 ~ 10)

**get_hist_image_cvip** - generates
a histogram Image from an image

**gray_linear_cvip** - graylevel linear modification

**histeq_cvip**
- histogram equalization

**hist_create_cvip** - creates
histogram as an array

**hist_spec_cvip** - perform
histogram manipulation using formula specified in by character string(s) for
the equation(s)

**hist_shrink_cvip** - shrink image
data to specified range

**hist_slide_cvip** - histogram
slide

**hist_stretch_cvip** - histogram
stretch, specify range and percent clip both ends

**local_histeq_cvip** - local
histogram equalization

**unsharp_cvip** - performs unsharp masking algorithm

**condremap_cvip** - performs
conditional remapping, user specified range and data type

**logremap_cvip** - performs a log
remapping, as in Equation 5.2-25

**relative_remap_cvip** - remaps an
image maintaining the relative range of each data band

**remap_cvip** - map image data into
a specified range

**morphclose_cvip** - perform
grayscale morphological closing

**morphdilate_cvip** - perform
grayscale morphological dilation

**morpherode_cvip** - perform
grayscale morphological erosion

**morphitermod_cvip** - performs
morphological iterative based modification as defined a set of surrounds, a
logical operation and the number of iterations

**morphopen_cvip** - perform
grayscale morphological opening

**morph_hitmiss_cvip** - perform hitmiss operation

**morph_skeleton_cvip** - perform skeletonization operation

**morph_thinning_cvip** - performs
thinning operation

**gamma_noise_cvip** - add gamma
noise to an image

**gaussian_noise_cvip** - add gaussian noise

**neg_exp_noise_cvip** - add
negative-exponential noise

**rayleigh_noise_cvip**** **- add Rayleigh noise

**salt_pepper_noise_cvip** - add
speckle (salt-and-pepper) noise

**uniform_noise_cvip** - add
uniform noise

**peak_snr_cvip** - computes the peak signal-to-noise ratio between two images

**rms_error_cvip** - calculates the root-mean-squared-error between two images

**snr_cvip** - calculates the signal-to-noise ratio between two images

**k_nearest_neighbor_cvip** - reads
test and training files of feature vectors and creates output file for
classification using k-nearest neighbor classification method

**nearest_centroid_cvip** - reads
test and training files of feature vectors and creates output file for classification using nearest centroid classification
method

**nearest_centroid_set_cvip** - reads test and training files of feature vectors and
calculates centroids for each class

**nearest_neighbor_cvip** - reads test and training files of feature vectors and
creates output file for classification using nearest neighbor classification
method

**city_block_cvip** - calculates the city block distance
between two feature vectors

**euclidean_distance_cvip** - calculates the Euclidean distance between
two feature vectors

**maximum_value_metric_cvip** -
calculates the maximum value distance between two feature vectors

**minkowsi_distance_cvip** - calculates the Minkowski distance between
two feature vectors

**pattern_city_block_cvip** - takes two csv files as input, test and training set,
then calculates the city block distance metric by comparing each vector in the
test set to each in the training set

**pattern_euclidean_cvip** - takes two csv files as input, test and training set,
then calculates the Euclidean distance metric by comparing each vector in the
test set to each in the training set

**pattern_maximum_cvip** - takes two csv files as input, test and training set,
then calculates the maximum value distance metric by comparing each vector in
the test set to each in the training set

**pattern_minkowski_cvip** - takes two csv files as input, test and training set,
then calculates the minkowski distance metric by
comparing each vector in the test set to each in the training set

**pattern_tanimoto_cvip** - takes two csv files as input, test and training set,
then calculates the Tanimoto similarity metric by comparing each vector in the
test set to each in the training set

**pattern_vector_inner_product_cvip** - takes two csv files as input, test and training set,
then calculates the normalized vector inner product metric by comparing each
vector in the test set to each in the training set

**tanimoto_metric_cvip** -
calculates the Tanimoto similarity metric between two feature vectors

**vector_inner_product_cvip** -
calculates the *normalized *vector
inner product similarity metric between two feature vectors

**area_cvip** - calculates the area in pixels of a binary
object

**aspect_cvip** - finds the aspect ratio of a binary object

**central_moments_cvip** - returns the central moment of the order p
and q for an object on the labeled image

**centroid_cvip** - finds the centroid of a binary object

**cooccurence_cvip** - calculates the co-occurrence matrix for
an object

**euler_cvip** - finds the Euler number of a binary object

**feature_images_cvip** - extracts
features from a group of images, where each image contains one object of
interest, and uses corresponding mask images, output is a csv file

**feature_objects_cvip**** - **extracts features from a group of objects
in a single image and a single image mask for the objects, output is a csv file

**hist_feature_cvip** - calculates the 5 first order histogram
features for an object

**irregular_cvip** - calculates the irregularity ratio
of a binary object

**label_cvip** -labels
objects based on 6-connectivity, NW/SE diagonal

**orientation_cvip** - calculates
the axis of least second moment for a binary object

**perimeter_cvip** - calculates
perimeter of a binary object

**projection_cvip** - extracts
horizontal and vertical projections of a binary object

**rst_invariant_cvip** - calculates the 7
RST-invariant features defined in Table 6.1

**spectral_features_cvip** - extracts
spectral features based on Fourier transform and ring and sector power

**texture_features_cvip** - extracts
2^{nd}-order histogram based texture features

**thinness_cvip** - calculate the thinness ratio of
an object on the labeled image

**min_max_norm_cvip** - applies
min-max normalization to set of feature vectors in a matrix

**pattern_min_max_norm_cvip**
- two csv files are input, training and test sets, and returns new csv files
with the feature vectors normalized with min-max normalization

**pattern_range_norm_cvip** -two csv
files are input, training and test sets, and returns new csv files with the
feature vectors normalized with range normalization

**pattern_snd_norm_cvip** - two csv
files are input, training and test sets, and returns new csv files with the
feature vectors normalized with standard normal density (snd)
normalization

**pattern_softmax_norm_cvip** - two
csv files are input, training and test sets, and returns new csv files with the
feature vectors normalized with softmax scaling normalization

**pattern_unit_vector_norm_cvip** - two csv files are input, training and test sets, and
returns new csv files with the feature vectors normalized with unit vector
normalization

**range_norm_cvip** - normalizes a
set of feature vector values in a matrix based
on the range of each feature

**softmax_cvip** - applies softmax normalization to set of feature vectors in a matrix

**snd_norm_cvip** - applies standard
normal density normalization to a set of feature vectors in a matrix

**unit_vector_norm_cvip** - applies
unit vector normalization to set of feature vectors in
a matrix

**autothreshold_cvip** - perform
auto single thresholding segmentation

**fuzzyc_cvip** - perform Fuzzy
c-Means color segmentation

**gray_quant_cvip** - perform gray
level quantization

**hist_thresh_cvip** - perform adaptive
thresholding segmentation

**igs_cvip** - perform improved gray
scale (IGS) quantization

**median_cut_cvip** - perform median
cut segmentation

**otsu_cvip** - perform Otsu
thresholding segmentation

**pct_median_cvip** -
perform PCT/median cut segmentation

**sct_split_cvip** - perform
SCT/Center Split segmentation

**threshold_cvip** - perform binary threshold on an image

**watershed_cvip** - perform
watershed segmentation

**ace2_filter_cvip** - adaptive contrast and
enhancement filter

**adaptive_contrast_cvip**- adaptive contrast filter, adapts to local gray level
statistics

**adapt_median_filter_cvip** - a
ranked-order based adaptive median filter

**ad_filter_cvip** - anisotropic
diffusion filter

**exp_ace_filter_cvip** - performs
an exponential ACE filter

**improved_mmse_filter_cvip** - perform
improved adaptive minimum mean squared error filter

**kuwahara_filter_cvip** - an edge
preserving, smoothing filter

**log_ace_filter_cvip** - performs a
log ACE filter operation

**mmse_filter_cvip** - minimum mean squared error restoration
filter

**arithmetic_mean_cvip** - perform an
arithmetic mean averaging filter

**contra_mean_cvip** - perform a
contra-harmonic mean filter

**geometric_mean_cvip** - performs a geometric mean filter

**harmonic_mean_cvip** - performs a
harmonic mean filter

**raster_deblur_mean_cvip** - raster deblurring filter

**yp_mean_cvip** - performs a Yp mean filter

**convolve_filter_cvip** - convolves an image with a user specified convolution mask

**difference_filter_cvip** - performs a difference/emboss filter

**alpha_filter_cvip** - perform an alpha-trimmed mean filter

**maximum_filter_cvip** - performs a maximum filter

**median_filter_cvip** - performs a fast histogram-method median filter

**midpoint_filter_cvip** - performs a midpoint filter

**minimum_filter_cvip** - performs a minimum filter on an image

**dct_cvip** - perform
block-wise discrete cosine transform

**fft_cvip** - performs fast Fourier
transform

**fft_mag_cvip** - extract magnitude
of Fourier spectrum

**fft_phase_cvip** - extract phase
of Fourier spectrum

**haar_cvip** - perform forward Haar transform

**idct_cvip** - inverse
discrete cosine transform

**ifft_cvip** - performs inverse
Fourier transform

**ihaar_cvip** - perform inverse Haar transform

**iwalhad_cvip** - perform inverse
Walsh/Hadamard transform

**iwavdaub4_cvip** - perform inverse wavelet transform based on Daubechies wavelet

**iwavhaar_cvip** - perform inverse
wavelet transform based on Haar wavelet

**wavdaub4_cvip** - perform forward wavelet transform based on Daubechies wavelet

**wavhaar_cvip** - perform forward
wavelet transform based on Haar wavelet

**walhad_cvip** - perform forward Walsh/Hadamard
transform

**butterworth_bandpass_cvip** - perform Butterworth bandpass filter

**butterworth_bandreject_cvip** - perform Butterworth bandreject filter

**butterworth_high_cvip** - perform Butterworth highpass filter

**butterworth_low_cvip** - perform Butterworth lowpass filter

**highfreqemphasis_cvip** - perform high frequency emphasis filter

**homomorphic_cvip** - performs homomorphic filtering on an input

**h_image_cvip** - create a mask image according to the size and type

**ideal_bandpass_cvip** - perform ideal bandpass filter

**ideal_bandreject_cvip** - perform ideal bandreject filter

**ideal_high_cvip** - perform ideal highpass filter

**ideal_low_cvip** - perform ideal lowpass filter

**geometric_mean_xformfilter_cvip** - performs the geometric mean restoration filter

**inverse_xformfilter_cvip** - performs the inverse restoration frequency domain filter

**least_squares_filter_cvip** - performs the least squares restoration filter

**notch_filter_cvip** - performs the notch frequency domain filter

**parametric_wiener_filter_cvip** - performs the parameter Wiener restoration filter

**power_spect_eq_filter_cvip** - power spectrum equalization frequency domain restoration filter

**simple_wiener_filter_cvip** - performs the simple Wiener restoration filter

**wiener_filter_cvip** - performs the Wiener restoration filter