ArrayFire函数列表

 ArrayFire矩阵运算库提供了258个函数用来处理各种运算。涵盖的类型包括：

数学函数

https://arrayfire.org/docs/group__mathfunc__mat.htm

线性代数

https://arrayfire.org/docs/group__linalg__mat.htm

信号处理

https://arrayfire.org/docs/group__signal__mat.htm

统计学

https://arrayfire.org/docs/group__stats__mat.htm

图像处理

https://arrayfire.org/docs/group__image__mat.htm

输入输出

https://arrayfire.org/docs/group__io__mat.htm

内存管理

https://arrayfire.org/docs/group__memory__manager.htm

等，下面时全部的函数列表：

 

abs	Absolute value.
accum	Cumulative sum (inclusive).
acos	Inverse cosine.
acosh	Inverse hyperbolic cosine.
add	Addition of two inputs.
allocHost	Allocate memory on host.
allocV2	Allocate memory using the ArrayFire memory manager.
allTrue	Test if all values in an array are true.
allTrueByKey	Calculate if all values that share the same consecutive keys are true.
and	Logical AND.
anisotropicDiffusion	Anisotropic Smoothing Filter.
anytrue	Calculate if any values in an array are true.
anyTrueByKey	Calculate if any values that share the same consecutive keys are true.
approx1	Interpolation across a single dimension.
approx2	Interpolation along two dimensions.
arg	Phase of a number in the complex plane.
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.
canny	Canny Edge Detector.
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
confidenceCC	Segment image based on similar pixel characteristics.
conjg	Get complex conjugate.
constant	Create a array from a scalar input value.
convolve (Non-separable)	Convolution Integral for any(one through three) dimensional data.
convolve (Separable)	Separable Convolution.
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.
countByKey	Counts the non-zero values of an input array according to an array of keys.
cov	Find the covariance of values in the input.
deleteImageMem	Delete memory created by saveImageMem and af_save_image_memory function.
dense	Returns a dense array from a sparse input.
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.
dog	Difference of Gaussians.
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.
features	Lookup values of an array based on sequences and/or arrays.
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.
fir	This function implements a Finite Impulse Filter.
flat	Flatten the input to a single dimension.
flip	Flip the input along specified dimension.
floor	Round to integer less than equal to current value.
freeHost	Free memory allocated on host internally by ArrayFire.
freePinned	Free pinned memory allocated by ArrayFire's memory manager.
freeV2	Returns memory to 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.
getDefaultRandomEngine	Returns the default random engine object.
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	Returns the seed for random number generation.
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 of an array based on sequences and/or arrays.
info	Display ArrayFire and device info.
infoString	Get af::info() as a string.
inverse	Invert a matrix.
inverseDeconv	Inverse Deconvolution.
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.
isHalfAvailable	Check if half(16-bit) precision floating point support is available for specified device.
isImageIoAvailable	Returns true if ArrayFire was compiled with ImageIO (FreeImage) support.
isinf	Check if values are infinite.
isLAPACKAvailable	Returns true is ArrayFire is compiled with LAPACK support.
isNan	Check if values are Nan.
iszero	Check if values are zero.
iterativeDeconv	Iterative Deconvolution.
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)
lookup	Lookup values of an array by indexing with another array.
lower	Create a lower triangular matrix 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.
max	Maximum of two inputs.
maxByKey	Finds the max of an input array according to an array of keys.
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.
min	Minimum of two inputs.
minByKey	Finds the min of an input array according to an array of keys.
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.
moments	The moments() function allows for finding different properties of image regions.
mul	Multiply two inputs element wise.
nearestNeighbour	Determine the nearest neighbouring points to a given set of points.
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/=	Divides 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=	Assignes 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.
or	Logical or of two inputs.
orb	ORB Feature descriptor.
pad	Pad an array.
pinned	Allocate pinned memory using ArrayFire's memory manager.
pinverse	Pseudo-invert a matrix.
pow	Raise an array to a power.
print	Print the array to screen.
product	Find the product of values in the input.
productByKey	Finds the product of an input array according to an array of keys.
qr	Perform QR decomposition.
randn	Create a random array sampled from normal distribution.
randomEngine	Functions to create, modify, use, and destroy randomEngine objects.
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 an array according to the specified dimensions.
replace	Replace elements of an array based on a 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 or array.
round	Round to nearest integer.
row/rows	Gets a reference of a row in a 2D af::array.
rsqrt	The reciprocal or inverse square root of input arrays.
sat	Summed Area Tables.
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.
scan	Inclusive or exclusive scan of an array.
scanByKey	Inclusive or exclusive scan of an array by key.
select	Selects elements from two arrays based on the values of a binary conditional array.
setBackend	Set the current backend when using Unified backend.
setDefaultRandomEngineType	Set the default random engine type.
setDevice	Change current device to specified device.
setintersect	Find the intersection of two sets.
setSeed	Set the seed for random number generation.
setunion	Find the union of two sets.
setunique	Finds unique values from an input set.
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.
sparse	Create a sparse array.
sparseConvertTo	Convert an existing sparse array into a different storage format.
sparseGetColdx	Returns reference to the column indices component of the sparse array.
sparseGetInfo	Returns reference to components of the input sparse array.
sparseGetNNZ	Returns the number of non zero elements in the sparse array.
sparseGetRowIdx	Returns reference to the row indices component of the sparse array.
sparseGetStorage	Returns the storage type of a sparse array.
sparseGetValues	Returns reference to the values component of the sparse array.
sqrt	Square root of input arrays.
stdev	Find the standard deviation of values in the input.
sub	Subtract one input from another.
sum	Find the sum of values in the input.
sumByKey	Finds the sum of an input array according to an array of keys.
susan	SUSAN corner detector.
svd	Computes the singular value decomposition of a matrix.
sync	Blocks until all operations on device are finished.
tan/tan2	tan of input
tanh	tanh of input
tgamma	Gamma function.
tile	Repeat the contents of the input array along the specified dimensions.
topk	This function returns the top k values along a given dimension of the input array.
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	Rearrange windowed sections of an array into columns (or rows)
upper	Create a upper triangular matrix from input array.
var	Find the variance of values in the input.
where	Locate the indices of non-zero elements.
wrap	Performs the opposite of unwrap().
ycbcr2rgb	YCbCr to RGB colorspace converter.