Transcription of CS231A Course Notes 1: Camera Models - Stanford University
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CS231A Course Notes 1: Camera Models - Stanford University
CS231A Course Notes 1: Camera ModelsKenji Hata and Silvio Savarese1 IntroductionThe Camera is one of the most essential tools in computer vision. It is themechanism by which we can record the world around us and use its output -photographs - for various applications. Therefore, one question we must askin introductory computer vision is: how do we model a Camera ?2 Pinhole camerasbarrier object aperture film Figure 1: A simple working Camera model: the pinhole Camera s design a simple Camera system a system that can record an imageof an object or scene in the 3D world. This Camera system can be designedby placing a barrier with a small aperture between the 3D object and aphotographic film or sensor.
this construction, the lm is commonly called the image or retinal plane. The aperture is referred to as the pinhole Oor center of the camera. The distance between the image plane and the pinhole Ois the focal length f. Sometimes, the retinal plane is placed between Oand the 3D object at a distance f from O.
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