如何使用多个核心图像过滤器对图像进行处理(不重新设置结果)

I have a project with several core image filters, each connected to a different slider. Everything works but I just have not figured out the best way to pass the results from one filter to the next. They each reset each time I change any of the other sliders. The reason is because the original image, created from an imported image is drawn in by each filter as the input image. But not sure how to fix this.I have a project with several core image filter