VLFeat库matlab API接口

• vl_compile Compile VLFeat MEX files
• vl_demo Run VLFeat demos
• vl_harris Harris corner strength
• vl_help VLFeat toolbox builtin help
• vl_noprefix Create a prefix-less version of VLFeat commands
• vl_root Obtain VLFeat root path
• vl_setup Add VLFeat Toolbox to the path

AIB

• vl_aib Agglomerative Information Bottleneck
• vl_aibcut Cut VL_AIB tree
• vl_aibcuthist Compute a histogram by using an AIB compressed alphabet
• vl_aibcutpush Quantize based on VL_AIB cut
• vl_aibhist Compute histogram over VL_AIB tree

FISHER

• vl_fisher Fisher vector feature encoding

GEOMETRY

• vl_hat Hat operator
• vl_ihat Inverse vl_hat operator
• vl_irodr Inverse Rodrigues' formula
• vl_rodr Rodrigues' formula

GMM

• vl_gmm Learn a Gaussian Mixture Model using EM

IMOP

• vl_dwaffine Derivative of an affine warp
• vl_imarray Flattens image array
• vl_imarraysc Scale and flattens image array
• vl_imdisttf Image distance transform
• vl_imdown Downsample an image by two
• vl_imgrad Image gradient
• vl_imintegral Compute integral image
• vl_impattern Generate an image from a stock pattern
• vl_imreadbw Reads an image as gray-scale
• vl_imreadgray Reads an image as gray-scale
• vl_imsc Scale image
• vl_imsmooth Smooth image
• vl_imup Upsample an image by two
• vl_imwbackward Image backward warping
• vl_imwhiten Whiten an image
• vl_rgb2xyz Convert RGB color space to XYZ
• vl_tps Compute the thin-plate spline basis
• vl_tpsu Compute the U matrix of a thin-plate spline transformation
• vl_waffine Apply affine transformation to points
• vl_witps Inverse thin-plate spline warping
• vl_wtps Thin-plate spline warping
• vl_xyz2lab Convert XYZ color space to LAB
• vl_xyz2luv Convert XYZ color space to LUV
• vl_xyz2rgb Convert XYZ to RGB

KMEANS

• vl_hikmeans Hierachical integer K-means
• vl_hikmeanshist Compute histogram of quantized data
• vl_hikmeanspush Push data down an integer K-means tree
• vl_ikmeans Integer K-means
• vl_ikmeanshist Compute histogram of quantized data
• vl_ikmeanspush Project data on integer K-means paritions
• vl_kmeans Cluster data using k-means

MISC

• vl_alldist2 Pairwise distances
• vl_alphanum Sort strings using the Alphanum algorithm
• vl_argparse Parse list of parameter-value pairs
• vl_binsearch Maps data to bins
• vl_binsum Binned summation
• vl_colsubset Select a given number of columns
• vl_cummax Cumulative maximum
• vl_getpid Get MATLAB process ID
• vl_grad Compute the gradient of an image
• vl_histmarg Marginal of histogram
• vl_hog Compute HOG features
• vl_homkermap Homogeneous kernel map
• vl_ihashfind Find labels in an integer hash table
• vl_ihashsum Accumulate integer labels into a hash table
• vl_inthist Calculate Integral Histogram
• vl_isoctave Determines whether Octave is running
• vl_kdtreebuild Build randomized kd-tree
• vl_kdtreequery Query KD-tree
• vl_lbp Local Binary Patterns
• vl_lbpfliplr Flip LBP features left-right
• vl_localmax Find local maximizers
• vl_matlabversion Return MATLAB version as an integer
• vl_numder Numerical derivative
• vl_numder2 Numerical second derivative
• vl_override Override structure subset
• vl_pegasos [deprecated]
• vl_sampleinthist Sample integral histogram
• vl_simdctrl Toggle VLFeat SIMD optimizations
• vl_svmdataset Construct advanced SVM dataset structure
• vl_svmpegasos [deprecated]
• vl_svmtrain Train a Support Vector Machine
• vl_threads Control VLFeat computational threads
• vl_twister Random number generator
• vl_version Obtain VLFeat version information
• vl_whistc Weighted histogram
• vl_xmkdir Create a directory recursively.

MSER

• vl_erfill Fill extremal region
• vl_ertr Transpose exremal regions frames
• vl_mser Maximally Stable Extremal Regions

PLOTOP

• vl_cf Creates a copy of a figure
• vl_click Click a point
• vl_clickpoint Select a point by clicking
• vl_clicksegment Select a segment by clicking
• vl_det Compute DET curve
• vl_figaspect Set figure aspect ratio
• vl_linespec2prop Convert PLOT style line specs to line properties
• vl_plotbox Plot boxes
• vl_plotframe Plot a geometric frame
• vl_plotgrid Plot a 2-D grid
• vl_plotpoint Plot 2 or 3 dimensional points
• vl_plotstyle Get a plot style
• vl_pr Precision-recall curve.
• vl_printsize Set the printing size of a figure
• vl_roc ROC curve.
• vl_tightsubplot Tiles axes without wasting space
• vl_tpfp Compute true positives and false positives

QUICKSHIFT

• vl_flatmap Flatten a tree, assigning the label of the root to each node
• vl_imseg Color an image based on the segmentation
• vl_quickseg Produce a quickshift segmentation of a grayscale or color image
• vl_quickshift Quick shift image segmentation
• vl_quickvis Create an edge image from a Quickshift segmentation.

SIFT

• vl_covdet Covariant feature detectors and descriptors
• vl_dsift Dense SIFT
• vl_frame2oell Convert a geometric frame to an oriented ellipse
• vl_liop Local Intensity Order Pattern descriptor
• vl_phow Extract PHOW features
• vl_plotsiftdescriptor Plot SIFT descriptor
• vl_plotss Plot scale space
• vl_sift Scale-Invariant Feature Transform
• vl_siftdescriptor Raw SIFT descriptor
• vl_ubcmatch Match SIFT features
• vl_ubcread Read Lowe's SIFT implementation data files

SLIC

• vl_slic SLIC superpixels

SPECIAL

• vl_ddgaussian Second derivative of the Gaussian density function
• vl_dgaussian Derivative of the Gaussian density function
• vl_dsigmoid Derivative of the sigmoid function
• vl_gaussian Standard Gaussian density function
• vl_rcos RCOS function
• vl_sigmoid Sigmoid function

VLAD

• vl_vlad VLAD feature encoding

from: http://www.vlfeat.org/matlab/matlab.html