MATLAB File Help: cv

AdaptiveManifoldFilter	Interface for Adaptive Manifold Filter realizations
BackgroundSubtractorGMG	Background Subtractor module
BackgroundSubtractorMOG	Gaussian Mixture-based Backbround/Foreground Segmentation Algorithm
BriefDescriptorExtractor	Class for computing BRIEF descriptors.
DAISY	Class implementing DAISY descriptor.
DPMDetector	Deformable Part-based Models (DPM) detector
DTFilter	Interface for realizations of Domain Transform filter
DisparityWLSFilter	Disparity map filter based on Weighted Least Squares filter
EdgeAwareInterpolator	Sparse match interpolation algorithm
FREAK	Class implementing the FREAK (Fast Retina Keypoint) keypoint descriptor.
FastGlobalSmootherFilter	Interface for implementations of Fast Global Smoother filter
FastHoughTransform	Calculates 2D Fast Hough transform of an image
GraphSegmentation	Graph Based Segmentation algorithm
GuidedFilter	Interface for realizations of Guided Filter
HoughPoint2Line	Calculates coordinates of line segment corresponded by point in Hough space
LATCH	Class for computing the LATCH descriptor.
LUCID	Class implementing the Locally Uniform Comparison Image Descriptor.
MSDDetector	Class implementing the MSD (Maximal Self-Dissimilarity) keypoint detector.
MotionSaliencyBinWangApr2014	A Fast Self-tuning Background Subtraction Algorithm for Motion Saliency
ObjectnessBING	The Binarized normed gradients algorithm for Objectness
SIFT	Class for extracting keypoints and computing descriptors using the Scale Invariant Feature Transform (SIFT).
SURF	Class for extracting Speeded Up Robust Features from an image.
StarDetector	The class implements the Star keypoint detector.
StaticSaliencySpectralResidual	The Spectral Residual approach for Static Saliency
StructuredEdgeDetection	Class implementing edge detection algorithm
SuperpixelLSC	Class implementing the LSC (Linear Spectral Clustering) superpixels algorithm
SuperpixelSEEDS	Class implementing the SEEDS (Superpixels Extracted via Energy-Driven Sampling) superpixels algorithm
SuperpixelSLIC	Class implementing the SLIC (Simple Linear Iterative Clustering) superpixels algorithm
WBDetector	WaldBoost detector
autowbGrayworld	Implements a simple grayworld white balance algorithm
balanceWhite	The function implements different algorithm of automatic white balance
calcGlobalOrientation	Calculates a global motion orientation in a selected region
calcMotionGradient	Calculates a gradient orientation of a motion history image
calcOpticalFlowDF	DeepFlow optical flow algorithm implementation
calcOpticalFlowSF	Calculate an optical flow using "SimpleFlow" algorithm
calcOpticalFlowSparseToDense	Fast dense optical flow based on PyrLK sparse matches interpolation
covarianceEstimation	Computes the estimated covariance matrix of an image using the sliding window forumlation
dctDenoising	The function implements simple dct-based denoising
inpaint2	The function implements different single-image inpainting algorithms
jointBilateralFilter	Applies the joint bilateral filter to an image
l0Smooth	Global image smoothing via L0 gradient minimization
niBlackThreshold	Applies Niblack thresholding to input image
readOpticalFlow	Read a .flo file
rollingGuidanceFilter	Applies the rolling guidance filter to an image
segmentMotion	Splits a motion history image into a few parts corresponding to separate independent motions (for example, left hand, right hand)
updateMotionHistory	Updates the motion history image by a moving silhouette
writeOpticalFlow	Write a .flo to disk
AGAST	Detects corners using the AGAST algorithm
AKAZE	Class implementing the AKAZE keypoint detector and descriptor extractor
ANN_MLP	Artificial Neural Networks - Multi-Layer Perceptrons
AgastFeatureDetector	Wrapping class for feature detection using the AGAST method.
AlignMTB	Aligns images of the same scene with different exposures
BOWImgDescriptorExtractor	Class to compute an image descriptor using the bag of visual words
BOWKMeansTrainer	kmeans-based class to train visual vocabulary using the bag of visual words approach
BRISK	Class implementing the BRISK keypoint detector and descriptor extractor
BackgroundSubtractorKNN	K-nearest neigbours based Background/Foreground Segmentation Algorithm
BackgroundSubtractorMOG2	Gaussian Mixture-based Backbround/Foreground Segmentation Algorithm
Boost	Boosting
CLAHE	Contrast Limited Adaptive Histogram Equalization
CalibrateDebevec	Camera Response Calibration algorithm
CalibrateRobertson	Camera Response Calibration algorithm
CamShift	Finds an object center, size, and orientation
Canny	Finds edges in an image using the Canny algorithm
CascadeClassifier	Haar Feature-based Cascade Classifier for Object Detection
ConjGradSolver	Non-linear non-constrained minimization of a function with known gradient.
DTrees	Decision Trees
DescriptorExtractor	Common interface of 2D image Descriptor Extractors.
DescriptorMatcher	Common interface for matching keypoint descriptors.
DownhillSolver	Non-linear non-constrained minimization of a function.
DualTVL1OpticalFlow	"Dual TV L1" Optical Flow Algorithm
EM	Expectation Maximization Algorithm
EMD	Computes the "minimal work" distance between two weighted point configurations
EMDL1	Computes the "minimal work" distance between two weighted point configurations
FAST	Detects corners using the FAST algorithm
FastFeatureDetector	Wrapping class for feature detection using the FAST method.
FeatureDetector	Common interface of 2D image Feature Detectors.
FileStorage	Reading from or writing to a XML/YAML file storage
GFTTDetector	Wrapping class for feature detection using the goodFeaturesToTrack function.
GaussianBlur	Smoothes an image using a Gaussian filter
GeneralizedHoughBallard	Generalized Hough transform
GeneralizedHoughGuil	Generalized Hough transform
HOGDescriptor	Histogram of Oriented Gaussian (HOG) descriptor and detector
HausdorffDistanceExtractor	A simple Hausdorff distance measure between shapes defined by contours
HoughCircles	Finds circles in a grayscale image using the Hough transform
HoughLines	Finds lines in a binary image using the standard Hough transform
HoughLinesP	Finds line segments in a binary image using the probabilistic Hough transform
HuMoments	Calculates seven Hu invariants
KAZE	Class implementing the KAZE keypoint detector and descriptor extractor.
KNearest	The class implements K-Nearest Neighbors model
KalmanFilter	Kalman filter class
KeyPointsFilter	Methods to filter a vector of keypoints.
LDA	Linear Discriminant Analysis
Laplacian	Calculates the Laplacian of an image
LineSegmentDetector	Line segment detector class.
LogisticRegression	Logistic Regression classifier
MSER	Maximally Stable Extremal Region extractor
Mahalanobis	Calculates the Mahalanobis distance between two vectors
MergeDebevec	Merge exposure sequence to a single image
MergeMertens	Merge exposure sequence to a single image
MergeRobertson	Merge exposure sequence to a single image
NormalBayesClassifier	Bayes classifier for normally distributed data
ORB	Class implementing the ORB (oriented BRIEF) keypoint detector and descriptor extractor.
OnePassStabilizer	A one-pass video stabilizer
PCA	Principal Component Analysis class
PSNR	Computes PSNR image/video quality metric
RQDecomp3x3	Computes an RQ decomposition of 3x3 matrices
RTrees	Random Trees
Rodrigues	Converts a rotation matrix to a rotation vector or vice versa
RotatedRect	The class represents rotated (i.e. not up-right) rectangles on a plane.
SVD	Singular Value Decomposition
SVM	Support Vector Machines
Scharr	Calculates the first x- or y- image derivative using Scharr operator
ShapeContextDistanceExtractor	Implementation of the Shape Context descriptor and matching algorithm
SimilarRects	Class for grouping object candidates, detected by Cascade Classifier, HOG etc.
SimpleBlobDetector	Class for extracting blobs from an image.
Sobel	Calculates the first, second, third, or mixed image derivatives using an extended Sobel operator
StereoBM	Class for computing stereo correspondence using the block matching algorithm
StereoSGBM	Class for computing stereo correspondence using the semi-global block matching algorithm
Subdiv2D	Delaunay triangulation and Voronoi tesselation
SuperResolution	Class for a whole family of Super Resolution algorithms
Tonemap	Tonemapping algorithm used to map HDR image to 8-bit range
TonemapDrago	Tonemapping algorithm used to map HDR image to 8-bit range
TonemapDurand	Tonemapping algorithm used to map HDR image to 8-bit range
TonemapMantiuk	Tonemapping algorithm used to map HDR image to 8-bit range
TonemapReinhard	Tonemapping algorithm used to map HDR image to 8-bit range
TwoPassStabilizer	A two-pass video stabilizer
Utils	Utility and system information functions.
VideoCapture	Class for video capturing from video files or cameras
VideoWriter	Video Writer class
accumulate	Adds an image to the accumulator
accumulateProduct	Adds the per-element product of two input images to the accumulator
accumulateSquare	Adds the square of a source image to the accumulator
accumulateWeighted	Updates a running average
adaptiveThreshold	Applies an adaptive threshold to an array
applyColorMap	Applies a GNU Octave/MATLAB equivalent colormap on a given image
approxPolyDP	Approximates a polygonal curve(s) with the specified precision
arcLength	Calculates a contour perimeter or a curve length
arrowedLine	Draws an arrow segment pointing from the first point to the second one.
batchDistance	Naive nearest neighbor finder
bilateralFilter	Applies the bilateral filter to an image
blendLinear	Performs linear blending of two images.
blur	Smoothes an image using the normalized box filter
borderInterpolate	Computes the source location of an extrapolated pixel.
boundingRect	Calculates the up-right bounding rectangle of a point set
boxFilter	Blurs an image using the box filter
boxPoints	Finds the four vertices of a rotated rectangle
buildOpticalFlowPyramid	Constructs the image pyramid which can be passed to cv.calcOpticalFlowPyrLK
buildPyramid	Constructs the Gaussian pyramid for an image
calcBackProject	Calculates the back projection of a histogram
calcBlurriness	Calculate image blurriness
calcCovarMatrix	Calculates the covariance matrix of a set of vectors.
calcHist	Calculates a histogram of a set of arrays
calcOpticalFlowFarneback	Computes a dense optical flow using the Gunnar Farneback's algorithm
calcOpticalFlowPyrLK	Calculates an optical flow for a sparse feature set using the iterative Lucas-Kanade method with pyramids
calibrateCamera	Finds the camera intrinsic and extrinsic parameters from several views of a calibration pattern
calibrationMatrixValues	Computes useful camera characteristics from the camera matrix
circle	Draws a circle
clipLine	Clips the line against the image rectangle
colorChange	Color Change
compareHist	Compares two histograms
composeRT	Combines two rotation-and-shift transformations
computeCorrespondEpilines	For points in an image of a stereo pair, computes the corresponding epilines in the other image
computeRecallPrecisionCurve	Evaluate a descriptor extractor by computing precision/recall curve
connectedComponents	Computes the connected components labeled image of boolean image
contourArea	Calculates a contour area
convertMaps	Converts image transformation maps from one representation to another
convertPointsFromHomogeneous	Converts points from homogeneous to Euclidean space
convertPointsToHomogeneous	Converts points from Euclidean to homogeneous space
convertScaleAbs	Scales, calculates absolute values, and converts the result to 8-bit
convexHull	Finds the convex hull of a point set
convexityDefects	Finds the convexity defects of a contour
copyMakeBorder	Forms a border around an image.
cornerEigenValsAndVecs	Calculates eigenvalues and eigenvectors of image blocks for corner detection
cornerHarris	Harris corner detector
cornerMinEigenVal	Calculates the minimal eigenvalue of gradient matrices for corner detection
cornerSubPix	Refines the corner locations
correctMatches	Refines coordinates of corresponding points
createConcentricSpheresTestSet	Creates test set
createHanningWindow	Computes a Hanning window coefficients in two dimensions
cvtColor	Converts an image from one color space to another
decolor	Transforms a color image to a grayscale image
decomposeEssentialMat	Decompose an essential matrix to possible rotations and translation
decomposeHomographyMat	DECOMPOSEESSENTIALMAT Decompose a homography matrix to rotation(s), translation(s) and plane normal(s)
decomposeProjectionMatrix	Decomposes a projection matrix into a rotation matrix and a camera matrix
demosaicing	Demosaicing algorithm
denoise_TVL1	Primal-Dual algorithm to perform image denoising
detailEnhance	This filter enhances the details of a particular image
dilate	Dilates an image by using a specific structuring element
distanceTransform	Calculates the distance to the closest zero pixel for each pixel of the source image
drawChessboardCorners	Renders the detected chessboard corners
drawContours	Draws contours outlines or filled contours
drawKeypoints	Draws keypoints
drawMarker	Draws a marker on a predefined position in an image
drawMatches	Draws the found matches of keypoints from two images
edgePreservingFilter	Edge-preserving smoothing filter
eigen	Calculates eigenvalues and eigenvectors of a symmetric matrix
ellipse	Draws a simple or thick elliptic arc or fills an ellipse sector
ellipse2Poly	Approximates an elliptic arc with a polyline
equalizeHist	Equalizes the histogram of a grayscale image
erode	Erodes an image by using a specific structuring element
estimateAffine3D	Computes an optimal affine transformation between two 3D point sets
estimateGlobalMotionLeastSquares	Estimates best global motion between two 2D point clouds in the least-squares sense
estimateGlobalMotionRansac	Estimates best global motion between two 2D point clouds robustly (using RANSAC method)
estimateRigidTransform	Computes an optimal affine transformation between two 2D point sets
evaluateFeatureDetector	Evaluates a feature detector
fastNlMeansDenoising	Image denoising using Non-local Means Denoising algorithm
fastNlMeansDenoisingColored	Modification of fastNlMeansDenoising function for colored images
fastNlMeansDenoisingColoredMulti	Modification of fastNlMeansDenoisingMulti function for colored images sequences
fastNlMeansDenoisingMulti	Modification of fastNlMeansDenoising function for colored images sequences
fillConvexPoly	Fills a convex polygon
fillPoly	Fills the area bounded by one or more polygons
filter2D	Convolves an image with the kernel
filterSpeckles	Filters off small noise blobs (speckles) in the disparity map
find4QuadCornerSubpix	Finds subpixel-accurate positions of the chessboard corners
findChessboardCorners	Finds the positions of internal corners of the chessboard
findCirclesGrid	Finds the centers in the grid of circles
findContours	Finds contours in a binary image
findEssentialMat	Calculates an essential matrix from the corresponding points in two images
findFundamentalMat	Calculates a fundamental matrix from the corresponding points in two images
findHomography	Finds a perspective transformation between two planes
findTransformECC	Finds the geometric transform (warp) between two images in terms of the ECC criterion
fitEllipse	Fits an ellipse around a set of 2D points
fitLine	Fits a line to a 2D or 3D point set
flip	Flips a 2D array around vertical, horizontal, or both axes
floodFill	Fills a connected component with the given color
getAffineTransform	Calculates an affine transform from three pairs of the corresponding points
getBuildInformation	Returns OpenCV build information
getDefaultNewCameraMatrix	Returns the default new camera matrix
getDerivKernels	Returns filter coefficients for computing spatial image derivatives
getGaborKernel	Returns Gabor filter coefficients
getGaussianKernel	Returns Gaussian filter coefficients
getOptimalNewCameraMatrix	Returns the new camera matrix based on the free scaling parameter
getPerspectiveTransform	Calculates a perspective transform from four pairs of the corresponding points
getRectSubPix	Retrieves a pixel rectangle from an image with sub-pixel accuracy
getRotationMatrix2D	Calculates an affine matrix of 2D rotation
getStructuringElement	Returns a structuring element of the specified size and shape for morphological operations
getTextSize	Calculates the width and height of a text string
getValidDisparityROI	Computes valid disparity ROI from the valid ROIs of the rectified images
glob	Find all pathnames matching a specified pattern
goodFeaturesToTrack	Determines strong corners on an image
grabCut	Runs the GrabCut algorithm
groupRectangles	Groups the object candidate rectangles
groupRectangles_meanshift	Groups the object candidate rectangles using meanshift
illuminationChange	Illumination Change
imdecode	Reads an image from a buffer in memory
imencode	Encodes an image into a memory buffer
imread	Loads an image from a file
imreadmulti	Loads a multi-page image from a file
imwrite	Saves an image to a specified file
inRange	Checks if array elements lie between the elements of two other arrays
initCameraMatrix2D	Finds an initial camera matrix from 3D-2D point correspondences
initUndistortRectifyMap	Computes the undistortion and rectification transformation map
initWideAngleProjMap	initializes maps for cv.remap for wide-angle
inpaint	Restores the selected region in an image using the region neighborhood
integral	Calculates the integral of an image
intersectConvexConvex	Finds intersection of two convex polygons
invert	Finds the inverse or pseudo-inverse of a matrix
invertAffineTransform	Inverts an affine transformation
isContourConvex	Tests a contour convexity
kmeans	Finds centers of clusters and groups input samples around the clusters
line	Draws a line segment connecting two points
linearPolar	Remaps an image to polar space
logPolar	Remaps an image to log-polar space
matMulDeriv	Computes partial derivatives of the matrix product for each multiplied matrix
matchShapes	Compares two shapes
matchTemplate	Compares a template against overlapped image regions
meanShift	Finds an object on a back projection image
medianBlur	Blurs an image using the median filter
minAreaRect	Finds a rotated rectangle of the minimum area enclosing the input 2D point set
minEnclosingCircle	Finds a circle of the minimum area enclosing a 2D point set
minEnclosingTriangle	Finds a triangle of minimum area enclosing a 2D point set and returns its area.
moments	Calculates all of the moments up to the third order of a polygon or rasterized shape
morphologyEx	Performs advanced morphological transformations
norm	Calculates an absolute array norm, an absolute difference norm, or a relative difference norm.
normalize	Normalizes the norm or value range of an array
pencilSketch	Pencil-like non-photorealistic line drawing
perspectiveTransform	Performs the perspective matrix transformation of vectors
phaseCorrelate	Detect translational shifts that occur between two images
pointPolygonTest	Performs a point-in-contour test
polylines	Draws several polygonal curves
preCornerDetect	Calculates a feature map for corner detection
projectPoints	Projects 3D points to an image plane
putText	Draws a text string
pyrDown	Blurs an image and downsamples it
pyrMeanShiftFiltering	Performs initial step of meanshift segmentation of an image
pyrUp	Upsamples an image and then blurs it
randMVNormal	Generates sample from multivariate normal distribution
recoverPose	Recover relative camera rotation and translation from an estimated essential matrix and the corresponding points in two images, using cheirality check
rectangle	Draws a simple, thick, or filled up-right rectangle
rectify3Collinear	Computes the rectification transformations for 3-head camera, where all the heads are on the same line
remap	Applies a generic geometrical transformation to an image
reprojectImageTo3D	Reprojects a disparity image to 3D space
resize	Resizes an image
rotatedRectangleIntersection	Finds out if there is any intersection between two rotated rectangles.
sampsonDistance	Calculates the Sampson Distance between two points
seamlessClone	Seamless Cloning
sepFilter2D	Applies a separable linear filter to an image
solve	Solves one or more linear systems or least-squares problems.
solveLP	Solve given (non-integer) linear programming problem using the Simplex Algorithm.
solvePnP	Finds an object pose from 3D-2D point correspondences
solvePnPRansac	Finds an object pose from 3D-2D point correspondences using the RANSAC scheme
spatialGradient	Calculates the first order image derivative in both x and y using a Sobel operator
sqrBoxFilter	Calculates the normalized sum of squares of the pixel values overlapping the filter
stereoCalibrate	Calibrates the stereo camera
stereoRectify	Computes rectification transforms for each head of a calibrated stereo camera
stereoRectifyUncalibrated	Computes a rectification transform for an uncalibrated stereo camera
stylization	Stylization filter
tempfile	Return name of a temporary file
textureFlattening	Texture Flattening
threshold	Applies a fixed-level threshold to each array element
transform	Performs the matrix transformation of every array element
triangulatePoints	Reconstructs points by triangulation
undistort	Transforms an image to compensate for lens distortion
undistortPoints	Computes the ideal point coordinates from the observed point coordinates
validateDisparity	Validates disparity using the left-right check
warpAffine	Applies an affine transformation to an image
warpPerspective	Applies a perspective transformation to an image
watershed	Performs a marker-based image segmentation using the watershed algrorithm