private func unrotateImage(image : UIImage) -> UIImage {
        let size = image.size
        UIGraphicsBeginImageContext(size)
        image.drawInRect(CGRectMake(0, 0, size.width, size.height))
        
        let newImage = UIGraphicsGetImageFromCurrentImageContext()
        UIGraphicsEndImageContext()
        
        return newImage
    }