Does iOS 5 support blur CoreImage fiters?

While Core Image on iOS 5.0 lacks blur filters, there is still a way to get GPU-accelerated blurs of images and video. My open source GPUImage framework has multiple blur types, including Gaussian (using the GPUImageGaussianBlurFilter for a general Gaussian or the GPUImageFastBlurFilter for a hardware-optimized 9-hit Gaussian), box (using a GPUImageBoxBlurFilter), median (using a GPUImageMedianFilter), and a bilateral blur (using a GPUImageBilateralBlurFilter).

I describe the shaders used to pull off the hardware-optimized Gaussian blur in this answer, and you can examine the code I use for the rest within the framework. These filters run tens of times faster than any CPU-bound routine I've tried yet.

I've also incorporated these blurs into multi-stage processing effects, like unsharp masking, tilt-shift filtering, Canny edge detection, and Harris corner detection, all of which are available as filters within this framework.

Again, in an attempt to save all iOS blur isses, here is my contribution:

https://github.com/tomsoft1/StackBluriOS

A simple blur library based on Stack Blur. Stack Blur is very similar to Gaussian Blur, but much faster (see http://incubator.quasimondo.com/processing/fast_blur_deluxe.php )

use it like this:

UIImage *newIma=[sourceIma stackBlur:radius]

Hope this help