Accelerate 示例代码

Applying transformations to selected colors in an image

Desaturate a range of colors in an image with a multidimensional lookup table.

查看示例代码

Calculating the dominant colors in an image

Find the main colors in an image by implementing k-means clustering using the Accelerate framework.

查看示例代码

Creating an audio unit extension using the vDSP library

Add biquadratic filter audio-effect processing to apps like Logic Pro X and GarageBand with the Accelerate framework.

查看示例代码

Cropping to the subject in a chroma-keyed image

Convert a chroma-key color to alpha values and trim transparent pixels using Accelerate.

查看示例代码

Sharing texture data between the Model I/O framework and the vImage library

Use Model I/O and vImage to composite a photograph over a computer-generated sky.

查看示例代码

Supporting real-time ML inference on the CPU

Add real-time digital signal processing to apps like Logic Pro X and GarageBand with the BNNS Graph API.

查看示例代码

Creating an audio unit extension using the vDSP library

Add biquadratic filter audio-effect processing to apps like Logic Pro X and GarageBand with the Accelerate framework.

查看示例代码

Equalizing Audio with vDSP

Shape audio output using discrete cosine transforms and biquadratic filters.

查看示例代码

Adjusting Saturation and Applying Tone Mapping

Convert an RGB image to discrete luminance and chrominance channels, and apply color and contrast treatments.

查看示例代码

Adjusting the Brightness and Contrast of an Image

Use a gamma function to apply a linear or exponential curve.

查看示例代码

Adjusting the Hue of an Image

Convert an RGB image to L*a*b* color space and apply hue adjustment.

查看示例代码

Applying Tone Curve Adjustments to Images

Use the vImage library's polynomial transform to apply tone curve adjustments to images.

查看示例代码

Enhancing Image Contrast with Histogram Manipulation

Enhance and adjust the contrast of an image with histogram equalization and contrast stretching.

查看示例代码

Specifying Histograms with vImage

Calculate the histogram of one image and apply it to a second image.

查看示例代码

Compressing and Decompressing Data with Buffer Compression

Compress a string, write it to the file system, and decompress the same file using buffer compression.

查看示例代码

Compressing and Decompressing Data with Input and Output Filters

Compress and decompress streamed or from-memory data, using input and output filters.

查看示例代码

Compressing and Decompressing Files with Stream Compression

Perform compression or the appropriate kind of decompression to a file based on its path extension.

查看示例代码

Compressing and Decompressing Files with Swift Stream Compression

Perform compression for all files and decompression for files with supported extension types.

查看示例代码

Applying Color Transforms to Images with a Multidimensional Lookup Table

Create a multidimensional lookup table to convert RGB images to CMYK.

查看示例代码

Building a Basic Conversion Workflow

Learn the fundamentals of the convert-any-to-any function by converting a CMYK image to an RGB image.

查看示例代码

Converting Color Images to Grayscale

Convert a color image to grayscale using matrix multiplication.

查看示例代码

Converting Luminance and Chrominance Planes to an ARGB Image

Create a displayable ARGB image from the luminance and chrominance information supplied by your device's camera

查看示例代码

Sharing texture data between the Model I/O framework and the vImage library

Use Model I/O and vImage to composite a photograph over a computer-generated sky.

查看示例代码

Standardizing Arbitrary Image Formats for Processing

Convert assets with disparate color spaces and bit depths to a standard working format for applying vImage operations.

查看示例代码

Adding a Bokeh Effect

Simulate a bokeh effect by applying dilation.

查看示例代码

Blurring an Image

Filter an image by convolving it with custom and high-speed kernels.

查看示例代码

Applying vImage Operations to Video Sample Buffers

Use vImage's convert-any-to-any function to perform real-time image processing of video frames streamed from your device's camera.

查看示例代码

Reading From and Writing to Core Video Pixel Buffers

Transfer image data between Core Video pixel buffers and vImage buffers to integrate vImage operations into a Core Image workflow.

查看示例代码

Real-Time Video Effects with vImage

Use vImage to apply effects to a video feed in real time.

查看示例代码

Compresing and Saving a String to the File System

Compress the contents of a Unicode string and store the result on the file system.

查看示例代码

Compressing File System Directories

Compress the contents of an entire directory and store the result on the file system.

查看示例代码

Compressing Single Files

Compress a single file and store the result on the file system.

查看示例代码

Decompressing and Extracting an Archived Directory

Recreate an entire file system directory from an archive file.

查看示例代码

Decompressing and Parsing an Archived String

Recreate a string from an archive file.

查看示例代码

Decompressing Single Files

Recreate a single file from a compressed file.

查看示例代码

Data Packing for Fourier Transforms

Learn how vDSP packs frequency-domain data produced by Fourier transform routines.

查看示例代码

Finding the Component Frequencies in a Composite Sine Wave

Use 1D fast Fourier transform to compute the frequency components of a signal.

查看示例代码

Halftone Descreening with 2D Fast Fourier Transform

Reduce or remove periodic artifacts from images.

查看示例代码

Signal Extraction from Noise

Use Accelerate's discrete cosine transform to remove noise from a signal.

查看示例代码

Using Windowing with Discrete Fourier Transforms

Multiply signal data by window sequence values to reduce spectral leakage.

查看示例代码

Applying Geometric Transforms to Images

Reflect, shear, rotate, and scale image buffers using vImage.

查看示例代码

Applying transformations to selected colors in an image

Desaturate a range of colors in an image with a multidimensional lookup table.

查看示例代码

Applying vImage Operations to Regions of Interest

Limit the effect of vImage operations to rectangular regions of interest.

查看示例代码

Building a Basic Image-Processing Workflow

Resize an image with vImage.

查看示例代码

Compositing Images with Alpha Blending

Combine two images by using alpha blending to create a single output.

查看示例代码

Compositing Images with vImage Blend Modes

Combine two images by using blend modes to create a single output.

查看示例代码

Creating a Core Graphics Image Format

Provide descriptions of Core Graphics image formats for conversions to and from vImage.

查看示例代码

Creating a Core Graphics Image from a vImage Buffer

Create displayable representations of vImage buffers.

查看示例代码

Creating and Populating Buffers from Core Graphics Images

Initialize vImage buffers from Core Graphics images.

查看示例代码

Cropping to the subject in a chroma-keyed image

Convert a chroma-key color to alpha values and trim transparent pixels using Accelerate.

查看示例代码

Optimizing Image Processing Performance

Improve your app's performance by converting image buffer formats from interleaved to planar.

查看示例代码

Reducing Artifacts in Resampled Images

Avoid ringing effects introduced by the default Lanczos algorithm when scaling an image by using a custom resampling filter.

查看示例代码

Compressing an image using linear algebra

Reduce noise in an image using singular value decomposition (SVD).

查看示例代码

Computing the Mel Spectrum Using Linear Algebra

Generate a real-time mel spectrogram of audio using matrix multiplication.

查看示例代码

Finding an Interpolating Polynomial Using the Vandermonde Method

Use LAPACK to solve a linear system and find an interpolating polynomial to construct new points between a series of known data points.

查看示例代码

Finding an interpolating polynomial using the Vandermonde method

Use LAPACK to solve a linear system and find an interpolating polynomial to construct new points between a series of known data points.

查看示例代码

Solving Systems of Linear Equations with LAPACK

Select the optimal LAPACK routine to solve a system of linear equations.

查看示例代码

Solving systems of linear equations with LAPACK

Select the optimal LAPACK routine to solve a system of linear equations.

查看示例代码

Controlling vDSP Operations with Stride

Operate selectively on the elements of a vector at regular intervals.

查看示例代码

Resampling a Signal with Decimation

Reduce the sample rate of a signal, by specifying a decimation factor and applying a custom antialiasing filter.

查看示例代码

Use Linear Interpolation to Construct New Data Points

Fill the gaps in arrays of numerical data using linear interpolation.

查看示例代码

Using vDSP for Vector-based Arithmetic

Increase the performance of common mathematical tasks with vDSP vector-vector and vector-scalar operations.

查看示例代码

Creating a Sparse Matrix from Coordinate Format Arrays

Use separate coordinate format arrays to create sparse matrices.

查看示例代码

Creating a Sparse Matrix from Coordinate Format Arrays

Use separate coordinate format arrays to create sparse matrices.

查看示例代码

Creating Sparse Matrices

Create sparse matrices for factorization and solving systems.

查看示例代码

Creating Sparse Matrices

Create sparse matrices for factorization and solving systems.

查看示例代码

Implementing Iterative Methods

Use iterative methods to solve large problems faster and with a lower memory overhead than with direct methods.

查看示例代码

Implementing Iterative Methods

Use iterative methods to solve large problems faster and with a lower memory overhead than with direct methods.

查看示例代码

Solving Systems Using Direct Methods

Use direct methods to solve systems of equations where the coefficient matrix is sparse.

查看示例代码

Solving Systems Using Direct Methods

Use direct methods to solve systems of equations where the coefficient matrix is sparse.

查看示例代码

Solving Systems Using Iterative Methods

Use iterative methods to solve systems of equations where the coefficient matrix is sparse.

查看示例代码

Solving Systems Using Iterative Methods

Use iterative methods to solve systems of equations where the coefficient matrix is sparse.

查看示例代码

Rotating a Cube by Transforming Its Vertices

Rotate a cube through a series of keyframes using quaternion interpolation to transition between them.

查看示例代码

Working with Matrices

Solve simultaneous equations and transform points in space.

查看示例代码

Working with Quaternions

Rotate points around the surface of a sphere, and interpolate between them.

查看示例代码

Working with Vectors

Use vectors to calculate geometric values, calculate dot products and cross products, and interpolate between values.

查看示例代码

Calculating the dominant colors in an image

Find the main colors in an image by implementing k-means clustering using the Accelerate framework.

查看示例代码

Finding the Sharpest Image in a Sequence of Captured Images

Share image data between vDSP and vImage to compute the sharpest image from a bracketed photo sequence.

查看示例代码

Visualizing Sound as an Audio Spectrogram

Share image data between vDSP and vImage to visualize audio that a device microphone captures.

查看示例代码