刚才我在讨论区看到一些同学说起像素和色彩的关系,我看了上节课的回放,PowerPoint里其中一张slide写着“changing color pictures to black and white ones won't lose too much basic information of the picture, however it can make algorithm much simpler "把彩色照片变成黑白不会改变照片的基础信息,但它可以让我们把算式变得简单。