This includes changing the focal distance, or even slightly adjusting the viewpoint of the camera.

包括改变焦距或者甚至微调相机的视角。

Here, you can see how the final program is able to change the focal distance of any of the frames in our video, or we can even click on something in the image to get it in focus.

这里，你能看到最终的程序是如何改变视频中任意帧的焦距的，或者我们甚至可以点击图像中的某一物体来进行对焦。