aspirity-inc / FastSwiftBlur

Demo project with very fast blurring image through Apple Accelerate Framework

FastSwiftBlur

About

This is demo project with very fast blurring image through Apple Accelerate framework.

Technology

There are many ways for image processing on iPhone. One of them is very popular CIFilter, and other is vImage from Accelerate framework. vImage manipulates large images using CPU's vector processor. You can read about vImage here.

In this project we used some optimization magic. First of all image is downscaled for showing size via vImageScale, then it is cached in buffer. For blur we use vImageTentConvolve. Repetitive blur operations are putted in queue with background priority, and we delete unnecessary ones.

Using

• You can use FastBlurImageView instead of UIImageView and set blurRadius in it.

    let imageView = FastBlurImageView()
    imageView.blurRadius = 5

• You can use FastBlurManager directly.

    FastBlurManager.renderBlur(for: blurWorker, with: self, radius: blurRadius,
            callback: { [weak self] blurredImage in
                self?.setImage(image: blurredImage)
            })

• You can use UIImage extension.

    let myImage = UIImage(named: "blur_me")
    let blurredResult = myImage.fastBlur(radius: 10, scaledTo: CGSize(width: 100, height: 100))

Example

To run the example project, clone the repo, and run pod install from the Example directory first.

License

FastSwiftBlur is available under the MIT license. See the LICENSE file for more info.