A camera is an optical instrument that captures visual images of nature. At the basic level, the camera consists of a sealed box with a small hole that allows you to capture an image on a light-sensitive surface. A Camera has various lenses that have different mechanisms to control the light. Or capture the image; basically, if you know, lenses focus on the light entering the camera.
Another type of *camera is a digital video *camera that records a video sequence on a storage medium. Like a digital still camera, a digital video camera converts an optical image into a digital format and records the digital image on a storage medium.
Furthermore, a digital video *camera may record the video sequence in a computer’s memory or on a network-based storage system. The digital images recorded by a digital still camera are typically stored on a storage medium in the form of JPEG files, MPEG files. Or other types of files that represent an array of discrete data values. The digital images recorded by a digital video camera are typically stored in the form of AVI files. Or other types of files that represent an array of discrete data values.
The term “file” is used herein to refer to any representation of discrete data. That can be stored on a storage medium. The term “discrete data” is used herein to refer to a collection of binary digits that are arranged in a predetermined format. For example, a file may be represented as an array of bytes that are arranged in a particular order.