Images can be formed and displayed in different ways

图像可以通过不同的方式来拍摄和呈现
depending on properties of the object and properties of the imaging system

选用的方式取决于你拍摄的什么物体
that you're using to create the image.

以及成像系统的属性
You're familiar with certain kinds of images,

你们对某些影像已经很熟悉了
you've all probably taken a photograph with a camera.

你们所有人都用相机照过相吧
Photography has changed dramatically since you were born,

自你出生到现在摄影技术历经剧变
it used to be all on film and now it's almost all on digital.

以前都用胶卷而现在基本都已经数字化
These are different ways of capturing the same thing.

这两者其实是殊途同归
A photograph is a representation of what you can see,

照片是对你所见事物的呈现
it's a representation of how visible light reflects off of objects.

是对事物反射的可见光的一种呈现
So, you see the outlines of the objects, and their colors,

所以你可以看见物体的轮廓颜色
and their textures, but it's basically a representation of

以及纹理但基本上