gistfile1.txt

        CGImageRef  imgRef =   [self.liveImageContext createCGImage:ciimg
                                                           fromRect:ciimg.extent];

        UIImage     *newimg = [UIImage imageWithCGImage:imgRef];
        CGImageRelease(imgRef);

        dispatch_async(dispatch_get_main_queue(), ^{
            self.liveImageView.image = newimg;
        });