Functions

Documentation grouped according to category:

[detail level 1234]

ArrayFire Functions by Category
Computer Vision	A list of computer vision algorithms
Feature descriptors	ORB feature descriptor
gloh	SIFT feature detector and GLOH descriptor extractor
orb	ORB Feature descriptor
sift	SIFT feature detector and descriptor extractor
Feature detectors	FAST feature detector
DoG	Difference of Gaussians
fast	FAST feature detector
harris	Harris corner detector
susan	SUSAN corner detector
Feature matchers	Feature matchers
hammingMatcher	Hamming Matcher
nearestNeighbour	Nearest Neighbour
Template matching
matchTemplate	Template Matching
Functions to create and modify Arrays	Array constructors, random number generation, transpose, indexing, etc
Assignment & Indexing operation on arrays	Access sub regions of an array object
assign	Copy and write values in the locations specified by the sequences
col/cols	Gets a reference of a col in a 2D af::array
index	Lookup values on array based on sequences
operator()	Gets a reference to a set of elements
operator(star)=	Multiplies and assigns the value(s) of val to the elements of the af::array
operator+=	Adds and assigns the value(s) of val to the elements of the af::array
operator-=	Subtracts and assigns the value(s) of val to the elements of the af::array
operator/=	Divides and assigns the value(s) of val to the elements of the af::array
operator=	Assignes the value(s) of val to the elements of the af::array
row/rows	Gets a reference of a row in a 2D af::array
slice/slices	Gets a reference of a matrix in a 3D af::array
util	Utility functions to create objects of type af_index_t
Constructors of array class	Construct an array object
Functions to create arrays.	Constant, random, range, etc
constant	Create a array from a scalar input value
diag	Extract diagonal from a matrix when extract is set to true
getSeed	Get the seed for random number generator
identity	Create an identity array with diagonal values 1
iota	Create an sequence [0, dims.elements() - 1] and modify to specified dimensions dims and then tile it according to tile_dims
lower	Create a lower triangular marix from input array
randn	Create a random array sampled from a normal distribution
randu	Create a random array sampled from uniform distribution
range	Creates an array with [0, n] values along the seq_dim which is tiled across other dimensions
setSeed	Set the seed for random number generator
upper	Create a upper triangular marix from input array
Helper functions for arrays	Iszero, isInf, isNan, etc
cast	Casting inputs from one type to another
isNan	Check if values are Nan
isinf	Check if values are infinite
iszero	Check if values are zero
Managing devices in ArrayFire	Getting device pointer, allocating and freeing memory
alloc	Allocate memory using the ArrayFire memory manager
allocHost	Allocate memory on host
array::device<T>	Get the device pointer from the array and lock the buffer in memory manager
deviceInfo	Gets the information about device and platform as strings
deviceMemInfo	Memory manager related functions
free	Free device memory allocated by ArrayFire's memory manager
freeHost	Free memory allocated on host internally by ArrayFire
freePinned	Free pinned memory allocated by ArrayFire's memory manager
getDevice	Get the current device ID
getDeviceCount	Gets the number of compute devices on the system
info	Display ArrayFire and device info
infoString	Get af::info() as a string
isDoubleAvailable	Check if double precision support is available for specified device
pinned	Allocate pinned memory using ArrayFire's memory manager
setDevice	Change current device to specified device
sync	Blocks until all operations on device are finished
Methods of array class	Get information about the array object
Move and Reorder array content	Reorder, transpose, flip, join, tile, etc
flat	Flatten the input to a single dimension
flip	Flip the input along sepcified dimension
join	Join up to 4 arrays along specified dimension
moddims	Modify the input dimensions without changing the data order
reorder	Reorder the input by in the specified order
replace	Replace elements of an array based on an conditional array
select	Select elements from two arrays based on an conditional array
shift	Circular shift slong specified dimensions
tile	Tile the input array along specified dimensions
transpose	Matrix Transpose
Functions to work with internal array layout	Functions to work with arrayfire's internal data structure
createStridedArray	Create an array with specified strides and offset
getOffset	Get Offset of the underlying data
getStrides	Get strides of underlying data
isLinear	Check if all elements in array are contiguous
isOwner	Check if underlying data is owned by the current array
Image Processing	Image filtering, morphing and transformations
Colorspace conversions	RGB to gray, gray to RGB, RGB to HSV, etc
colorspace	Colorspace conversion function
gray2rgb	Grayscale to RGB colorspace converter
hsv2rgb	HSV to RGB colorspace converter
rgb2gray	RGB to Grayscale colorspace converter
rgb2hsv	RGB to HSV colorspace converter
rgb2ycbcr	RGB to YCbCr colorspace converter
ycbcr2rgb	YCbCr to RGB colorspace converter
Connected Components & Labeling	Regions
regions	Find blobs in given image
Filters	Bilateral, sobel, mean shift, median / min / max filters etc
SAT	Summed Area Tables
bilateral	Bilateral Filter
maxfilt	Find maximum value from a window
meanshift	Meanshift Filter
medfilt	Median Filter
minfilt	Find minimum value from a window
sobel	Sobel Operators
Histograms	Image and data histograms
histequal	Histogram equalization of input image
histogram	Histogram of input data
Image transformations	Rotate, skew, etc
resize	Resize an input image
rotate	Rotate an input image
scale	Scale an input image
skew	Skew an input image
transform	Transform an input image
transformcoordinates	Transform input coordinates
translate	Translate an input image
Morphological Operations	Erode, dilate, etc
dilate	Dilation(morphological operator) for images
dilate3d	Dilation(morphological operator) for volumes
erode	Erosion(morphological operator) for images
erode3d	Erosion(morphological operator) for volumes
Utility Functions	LoadImage, saveImage, gaussianKernel
gaussiankernel	Creates a Gaussian Kernel
Wrapping and unwrapping image windows	Wrap, unwrap, etc
unwrap	Generate an array with image windows as columns
wrap	Wrap takes an unwrapped image (see unwrap()) and converts it back to an image
Input and Output functions	Functions to read and write data
Reading and writing arrays	Printing data to screen / files
readArray	Load an array from a file
saveArray	Save an array to a binary file
Reading and writing images	Reading and writing images
deleteImageMem	Delete memory created by saveImageMem and af_save_image_memory function
isImageIoAvailable	Returns true if ArrayFire was compiled with ImageIO (FreeImage) support
loadImage	Load an image from disk to an array
loadImageMem	Load an image from memory which is stored as a FreeImage stream (FIMEMORY)
saveImage	Save an array to disk as an image
saveImageMem	Save an array to memory as an image using FreeImage stream (FIMEMORY)
Interface Functions	Backend specific functions
CUDA specific functions	Accessing ArrayFire's stream, and native device id with other CUDA code
OpenCL specific functions	Accessing ArrayFire's context, queue, and share data with other OpenCL code
Linear Algebra	Matrix multiply, solve, decompositions
BLAS operations	Matrix multiply, dot product, etc
dot	Calculate the dot product of a vector
matmul	Matrix multiplication using array
transpose	Matrix Transpose
LAPACK Helper functions
isLAPACKAvailable	Returns true is ArrayFire is compiled with LAPACK support
Linear solve and least squares	Solve, solveLU, etc
solve	Solve a system of equations
solveLU	Solve a system of equations
Matrix factorizations and decompositions	LU, QR, Cholesky etc
cholesky	Perform Cholesky decomposition
lu	Perform LU decomposition
qr	Perform QR decomposition
svd	Perform Singular Value Decomposition
Matrix operations	Inverse, det, rank, norm etc
det	Find the determinant of the input matrix
inverse	Invert a matrix
norm	Find the norm of the input matrix
rank	Find the rank of the input matrix
Mathematical functions	Functions from standard math library
Arithmetic operations	+, -, *, /, >>, <<
add	Addition of two inputs
bitshiftl	Left shift an input
bitshiftr	Right shift an input
div	Divide one input by another
mul	Multiply two inputs element wise
sub	Subtract one input from another
Complex operations	Real, imag, conjugate etc
complex	Create complex arrays
conjg	Get complex conjugate
imag	Get imaginary part of complex arrays
real	Get real part of complex arrays
Exponential and logarithmic functions	Exp, log, expm1, log1p, etc
cbrt	Cube root of input arrays
erf	Error function value
erfc	Complementary Error function value
exp	Exponential of input
expm1	Exponential of input - 1
factorial	Factorial function
lgamma	Logarithm of absolute values of Gamma function
log	Natural logarithm
log10	Logarithm base 10
log1p	Natural logarithm of (1 + in)
pow	Raise an array to a power
root	Find root of an input
sqrt	Square root of input arrays
tgamma	Gamma function
Hyperbolic functions	Sinh, cosh, tanh, etc
acosh	Acosh of input
asinh	Asinh of input
atanh	Atanh of input
cosh	Cosh of input
sinh	Sinh of input
tanh	Tanh of input
Logical operations	&&, ||, |, &, <, >, <=, >=, ==, !
and	Logical and of two inputs
bitand	Bitwise and operation of two inputs
bitor	Bitwise or operation of two inputs
bitxor	Bitwise xor operation of two inputs
eq	Check if input two inputs are equal
ge	Check if input is greater than or equal to another
gt	Check if input is greater than another
le	Check if input is less than or equal to another
lt	Check if input is less than another
neg	Negative of an input
neq	Check if input two inputs are not equal
not	Logical not of an input
or	Logical or of two inputs
Numeric functions	Floor, round, min, max, etc
abs	Absolute value
arg	Phase of a number in the complex plane
ceil	Round to integer greater than equal to current value
floor	Round to integer less than equal to current value
hypot	Hypotenuse of the two inputs
max	Maximum of two inputs
min	Minimum of two inputs
mod	Compute \(x - n * y\) where n is quotient of \(x / y\)
rem	Remainder operation
round	Round to nearest integer
sign	Check if input is negative
trunc	Truncate to nearest integer
Trigonometric functions	Sin, cos, tan, etc
acos	Arc cos of input
asin	Arc sin of input
atan/atan2	Arc tan of input
cos	Cos of input
sin	Sin of input
tan/tan2	Tan of input
Signal Processing	Convolutions, FFTs, filters
Convolutions	1D, 2D and 3D convolutions
convolve	Convolution Integral for any dimensional data
convolve1	Convolution Integral for one dimensional data
convolve2	Convolution Integral for two dimensional data
convolve3	Convolution Integral for three dimensional data
fftConvolve	Convolution using Fast Fourier Transform
fftConvolve2	2D Convolution using Fast Fourier Transform
fftConvolve3	3D Convolution using Fast Fourier Transform
Fast Fourier Transforms	1D, 2D and 3D forward, inverse FFTs
fft	Fast Fourier Transform
fft2	Fast Fourier Transform
fft3	Fast Fourier Transform
fftC2R	Complex to Real Fast Fourier Transform
fftR2C	Real to Complex Fast Fourier Transform
ifft	Fast Fourier Transform
ifft2	Fast Fourier Transform
ifft3	Fast Fourier Transform
Filter	Fir, iir, etc
fir	This function implements a Finite Impulse Filter
iir	This function implements a Infinite Impulse Filter
Interpolation and approximation	1D and 2D interpolation
approx1	Approx1 interpolates data along the first dimensions
approx2	Approx2 performs interpolation on data along the first and second dimensions
Statistics	A list of Statistics functions
Basic statistics functions	Mean, median, variance, etc
corrcoef	Find the correlation coefficient of values in the input
cov	Find the covariance of values in the input
mean	Find the mean of values in the input
median	Find the median of values in the input
stdev	Find the standar deviation of values in the input
var	Find the variance of values in the input
Unified API Functions	Functions to set current backend and utilities
getActiveBackend	Get's the backend enum for the active backend
getAvailableBackends	Returns an integer indicating the backends loaded successfully
getBackendCount	Get the number of backends whose libraries were successfully loaded
getBackendId	Get's the backend enum for an array
getDeviceId	Get's the id of the device an array was created on
setBackend	Set the current backend when using Unified backend
Vector Algorithms	Sum, min, max, sort, set operations, etc
Inclusive scan operations	Inclusive / cumulative sum, etc
accum	Perform exclusive sum along specified dimension
where	Locate the indices of non-zero elements
Numerical differentiation	Diff, gradient, etc
diff1	First order numerical difference along specified dimension
diff2	Second order numerical difference along specified dimension
grad	Calculate the gradients of the input
Reduction operations	Sum, min, max, etc
alltrue	Find if of all of the values in input are true
anytrue	Find if of any of the values in input are true
count	Count the number of non-zero elements in the input
max	Find the maximum values and their locations
min	Find the minimum values and their locations
product	Find the product of values in the input
sum	Find the sum of values in the input
Set operations	Unique, union, intersect
setintersect	Find intersection of two inputs
setunion	Find union of two inputs
setunique	Find unique values from an input
Sort operations	Sort, sort by key, etc
sort	Sort input arrays
sortByKey	Sort input arrays based on keys
sortIndex	Sort input arrays get the sorted indices
Complete List of ArrayFire Functions
DoG	Difference of Gaussians
SAT	Summed Area Tables
abs	Absolute value
accum	Perform exclusive sum along specified dimension
acos	Arc cos of input
acosh	Acosh of input
add	Addition of two inputs
alloc	Allocate memory using the ArrayFire memory manager
allocHost	Allocate memory on host
alltrue	Find if of all of the values in input are true
and	Logical and of two inputs
anytrue	Find if of any of the values in input are true
approx1	Approx1 interpolates data along the first dimensions
approx2	Approx2 performs interpolation on data along the first and second dimensions
arg	Phase of a number in the complex plane
array::device<T>	Get the device pointer from the array and lock the buffer in memory manager
asin	Arc sin of input
asinh	Asinh of input
assign	Copy and write values in the locations specified by the sequences
atan/atan2	Arc tan of input
atanh	Atanh of input
bilateral	Bilateral Filter
bitand	Bitwise and operation of two inputs
bitor	Bitwise or operation of two inputs
bitshiftl	Left shift an input
bitshiftr	Right shift an input
bitxor	Bitwise xor operation of two inputs
cast	Casting inputs from one type to another
cbrt	Cube root of input arrays
ceil	Round to integer greater than equal to current value
cholesky	Perform Cholesky decomposition
col/cols	Gets a reference of a col in a 2D af::array
colorspace	Colorspace conversion function
complex	Create complex arrays
conjg	Get complex conjugate
constant	Create a array from a scalar input value
convolve	Convolution Integral for any dimensional data
convolve1	Convolution Integral for one dimensional data
convolve2	Convolution Integral for two dimensional data
convolve3	Convolution Integral for three dimensional data
corrcoef	Find the correlation coefficient of values in the input
cos	Cos of input
cosh	Cosh of input
count	Count the number of non-zero elements in the input
cov	Find the covariance of values in the input
deleteImageMem	Delete memory created by saveImageMem and af_save_image_memory function
det	Find the determinant of the input matrix
deviceInfo	Gets the information about device and platform as strings
deviceMemInfo	Memory manager related functions
diag	Extract diagonal from a matrix when extract is set to true
diff1	First order numerical difference along specified dimension
diff2	Second order numerical difference along specified dimension
dilate	Dilation(morphological operator) for images
dilate3d	Dilation(morphological operator) for volumes
div	Divide one input by another
dot	Calculate the dot product of a vector
eq	Check if input two inputs are equal
erf	Error function value
erfc	Complementary Error function value
erode	Erosion(morphological operator) for images
erode3d	Erosion(morphological operator) for volumes
exp	Exponential of input
expm1	Exponential of input - 1
factorial	Factorial function
fast	FAST feature detector
fft	Fast Fourier Transform
fft2	Fast Fourier Transform
fft3	Fast Fourier Transform
fftC2R	Complex to Real Fast Fourier Transform
fftConvolve	Convolution using Fast Fourier Transform
fftConvolve2	2D Convolution using Fast Fourier Transform
fftConvolve3	3D Convolution using Fast Fourier Transform
fftR2C	Real to Complex Fast Fourier Transform
fir	This function implements a Finite Impulse Filter
flat	Flatten the input to a single dimension
flip	Flip the input along sepcified dimension
floor	Round to integer less than equal to current value
free	Free device memory allocated by ArrayFire's memory manager
freeHost	Free memory allocated on host internally by ArrayFire
freePinned	Free pinned memory allocated by ArrayFire's memory manager
gaussiankernel	Creates a Gaussian Kernel
ge	Check if input is greater than or equal to another
getActiveBackend	Get's the backend enum for the active backend
getAvailableBackends	Returns an integer indicating the backends loaded successfully
getBackendCount	Get the number of backends whose libraries were successfully loaded
getBackendId	Get's the backend enum for an array
getDevice	Get the current device ID
getDeviceCount	Gets the number of compute devices on the system
getDeviceId	Get's the id of the device an array was created on
getSeed	Get the seed for random number generator
gloh	SIFT feature detector and GLOH descriptor extractor
grad	Calculate the gradients of the input
gray2rgb	Grayscale to RGB colorspace converter
gt	Check if input is greater than another
hammingMatcher	Hamming Matcher
harris	Harris corner detector
histequal	Histogram equalization of input image
histogram	Histogram of input data
homography	Homography Estimation
hsv2rgb	HSV to RGB colorspace converter
hypot	Hypotenuse of the two inputs
identity	Create an identity array with diagonal values 1
ifft	Fast Fourier Transform
ifft2	Fast Fourier Transform
ifft3	Fast Fourier Transform
iir	This function implements a Infinite Impulse Filter
imag	Get imaginary part of complex arrays
index	Lookup values on array based on sequences
info	Display ArrayFire and device info
infoString	Get af::info() as a string
inverse	Invert a matrix
iota	Create an sequence [0, dims.elements() - 1] and modify to specified dimensions dims and then tile it according to tile_dims
isDoubleAvailable	Check if double precision support is available for specified device
isImageIoAvailable	Returns true if ArrayFire was compiled with ImageIO (FreeImage) support
isLAPACKAvailable	Returns true is ArrayFire is compiled with LAPACK support
isNan	Check if values are Nan
isinf	Check if values are infinite
iszero	Check if values are zero
join	Join up to 4 arrays along specified dimension
le	Check if input is less than or equal to another
lgamma	Logarithm of absolute values of Gamma function
loadImage	Load an image from disk to an array
loadImageMem	Load an image from memory which is stored as a FreeImage stream (FIMEMORY)
log	Natural logarithm
log10	Logarithm base 10
log1p	Natural logarithm of (1 + in)
lower	Create a lower triangular marix from input array
lt	Check if input is less than another
lu	Perform LU decomposition
matchTemplate	Template Matching
matmul	Matrix multiplication using array
max	Find the maximum values and their locations
maxfilt	Find maximum value from a window
mean	Find the mean of values in the input
meanshift	Meanshift Filter
medfilt	Median Filter
median	Find the median of values in the input
min	Find the minimum values and their locations
minfilt	Find minimum value from a window
mod	Compute \(x - n * y\) where n is quotient of \(x / y\)
moddims	Modify the input dimensions without changing the data order
mul	Multiply two inputs element wise
nearestNeighbour	Nearest Neighbour
neg	Negative of an input
neq	Check if input two inputs are not equal
norm	Find the norm of the input matrix
not	Logical not of an input
operator()	Gets a reference to a set of elements
operator(star)=	Multiplies and assigns the value(s) of val to the elements of the af::array
operator+=	Adds and assigns the value(s) of val to the elements of the af::array
operator-=	Subtracts and assigns the value(s) of val to the elements of the af::array
operator/=	Divides and assigns the value(s) of val to the elements of the af::array
operator=	Assignes the value(s) of val to the elements of the af::array
or	Logical or of two inputs
orb	ORB Feature descriptor
pinned	Allocate pinned memory using ArrayFire's memory manager
pow	Raise an array to a power
print	Print the array to screen
product	Find the product of values in the input
qr	Perform QR decomposition
randn	Create a random array sampled from a normal distribution
randu	Create a random array sampled from uniform distribution
range	Creates an array with [0, n] values along the seq_dim which is tiled across other dimensions
rank	Find the rank of the input matrix
readArray	Load an array from a file
real	Get real part of complex arrays
regions	Find blobs in given image
rem	Remainder operation
reorder	Reorder the input by in the specified order
replace	Replace elements of an array based on an conditional array
resize	Resize an input image
rgb2gray	RGB to Grayscale colorspace converter
rgb2hsv	RGB to HSV colorspace converter
rgb2ycbcr	RGB to YCbCr colorspace converter
root	Find root of an input
rotate	Rotate an input image
round	Round to nearest integer
row/rows	Gets a reference of a row in a 2D af::array
saveArray	Save an array to a binary file
saveImage	Save an array to disk as an image
saveImageMem	Save an array to memory as an image using FreeImage stream (FIMEMORY)
scale	Scale an input image
select	Select elements from two arrays based on an conditional array
setBackend	Set the current backend when using Unified backend
setDevice	Change current device to specified device
setSeed	Set the seed for random number generator
setintersect	Find intersection of two inputs
setunion	Find union of two inputs
setunique	Find unique values from an input
shift	Circular shift slong specified dimensions
sift	SIFT feature detector and descriptor extractor
sign	Check if input is negative
sin	Sin of input
sinh	Sinh of input
skew	Skew an input image
slice/slices	Gets a reference of a matrix in a 3D af::array
sobel	Sobel Operators
solve	Solve a system of equations
solveLU	Solve a system of equations
sort	Sort input arrays
sortByKey	Sort input arrays based on keys
sortIndex	Sort input arrays get the sorted indices
sqrt	Square root of input arrays
stdev	Find the standar deviation of values in the input
sub	Subtract one input from another
sum	Find the sum of values in the input
susan	SUSAN corner detector
svd	Perform Singular Value Decomposition
sync	Blocks until all operations on device are finished
tan/tan2	Tan of input
tanh	Tanh of input
tgamma	Gamma function
tile	Tile the input array along specified dimensions
toString	Print the array to a string instead of the screen
transform	Transform an input image
transformcoordinates	Transform input coordinates
translate	Translate an input image
transpose	Matrix Transpose
trunc	Truncate to nearest integer
unwrap	Generate an array with image windows as columns
upper	Create a upper triangular marix from input array
util	Utility functions to create objects of type af_index_t
var	Find the variance of values in the input
where	Locate the indices of non-zero elements
wrap	Wrap takes an unwrapped image (see unwrap()) and converts it back to an image
ycbcr2rgb	YCbCr to RGB colorspace converter
Graphics
Rendering Functions	Rendering functions to draw images, plots etc
Window Functions	Window creation, modification and destruction functions