针孔摄像头并不是整个摄像头的体积跟针一样小，针孔只是一种夸张的说法而已。
针孔镜头，纽扣镜头，螺丝镜头可选。
具端著丝粒的镜头(注：我猜是类似于针孔镜头吧)具有宽阔之景深，以具端著丝粒的镜头，你能够将由镜头不同距离之目标物成像和保持目标物在焦。
Telocentric lenses work with a wide depth of field. with a telocentric lens, you can image objects of different distances from the lens and the objects stay in focus.
在建模时，认为前景摄像头是理想的线性镜头，不考虑其畸变，运用针孔成像原理进行建模。
When modeling, it is proposed that local camera is ideal linear, used pinhole imaging theory to model, don't consider its distortion.
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