ABSTRACT
In this chapter, the authors develop a mathematical model for pinhole camera. They discuss how the deviation from the pinhole model affects image capture or acquisition from practical cameras. The pin-hole camera is modelled as a closed box with a tiny hole punched with a pin on one of its faces. Light rays from any point in a scene enter the box only through this pinhole forming an inverted image on the opposite face of the box which is therefore termed the image plane. The advantage of the pinhole camera is that every point in the scene, irrespective of its distance from the pinhole, will form a crisp or focused point image on the image plane. Fun Facts the early cameras were called camera obscura which was essentially a pinhole camera that was used extensively by artists to create paintings by tracing out the image formed by the camera obscura.
