Question

在我的项目中，我为图像添加颜色，然后在一秒钟内应用Kuwahara滤镜以达到水彩效果，但问题是应用滤镜会花费一些时间，如果我过多改变颜色，应用程序最终由于内存问题而崩溃。谁能帮助我以最佳方式使用过滤器。谢谢

CODE

@objc func fillColorButtonTapped(_ sender : UIButton){

    self.processingModel.isImageMixedColor = false

    if let popoverController = self.mkColorPicker.popoverPresentationController{
        popoverController.delegate = self.mkColorPicker
        popoverController.permittedArrowDirections = .any
        popoverController.sourceView = sender
        popoverController.sourceRect = sender.bounds
    }

    self.present(self.mkColorPicker, animated: true, completion: nil)

    self.mkColorPicker.selectedColor = { [weak self] color in

        guard let strongSelf = self else {
            return
        }

        let image = ChangeColor.image(byReplacingColor: strongSelf.processingModel.pencileDefaultImage, withSourceColor: .black, withMinTolerance: 0.4, withMaxTolerance: 0.5, with: color)
        strongSelf.processingModel.croppedImageToWorkOn =  image
        UIView.transition(with: strongSelf.handAndFootImageView,
                          duration: 0.2,
                          options: .transitionCrossDissolve,
                          animations: {strongSelf.handAndFootImageView.image = strongSelf.processingModel.croppedImageToWorkOn},
                          completion: nil)

        strongSelf.addWaterColorEffect()

    }
}

func addWaterColorEffect(withRadius : Int = 5){


    CommonClass.delayWithSeconds(0.5, completion: {

        let filter = KuwaharaFilter()
        filter.radius = withRadius
        let imageToFilter = self.containerView.toImage()
        DispatchQueue.main.async {

            let imageToShow =  imageToFilter.filterWithOperation(filter)

            UIView.transition(with: self.handAndFootImageView,
                              duration: 0.6,
                              options: .transitionCrossDissolve,
                              animations: {self.handAndFootImageView.image = imageToShow },
                              completion: nil)

            self.processingModel.croppedImageToWorkOn =  imageToShow
        }


    })

}

Answer 1

这就是我会根据我想立即使用GPUImage2快速设置滤镜的方法。图像进入彩色滤光片，然后进入溶解混合物（混合物0.0）的源1。然后将颜色滤镜发送到kuwahara滤镜中，然后发送到溶解混合液的来源2中。从那里，您可以在两者之间切换，并根据需要更改半径。

func setupFilters() {
    image --> colorFilter --> dissolveBlend
    colorFilter --> kuwaharaFilter --> dissolveBlend --> renderView
    dissolveBlend.mix = 0.0
}

func addWaterColorEffect(withRadius : Int = 5){
    kuwaharaFilter.radius = withRadius
    dissolveBlend.mix = 1.0 
    // This will not give you a transition but you can use a while loop or timer 
    // to change the mix over the course of whatever length of time you are seeking.
}

如何有效地应用GPUImage滤镜？

1 个答案: