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5.2 Images Information without course or NumbersImages play a fundamental role in the representation, storage, and transmission of important reading throughout our professional and personal lives. In many professions, including publishing, art, film making, architecture, and medicine, it is crucial to be able to represent and put off information in word picture form. Furthermore, with the development of multimedia technology and realistic reality, many other professions are beginning to explore the power of representing information in visual form. In Chapter 3, we introduced the ideas behind binary representation of information, and in particular showed how integr and text can be converted into binary form. We likewise mentioned that other types of information can be represented by bits, and concisely described the process one might use to convert an chain of mountains into binary digits. We then suggested how this would extend to representation of time-varying imagery, or v ideo. 5.3 Cameras and Image organizationAs mentioned in the introduction to this book, the film-based camera is over 150 old age old. Recent advances have provided a variety of alternatives to the use of conventional film, just the basic image formation process has not changed. This process may be familiar to you from experience with basic optics, and is illustrated in Figure 5.1. The inseparable components of this system are the object or scene to be imaged, the lens, and the image recording strong suit (retina of the eye, film, or other device). The image recording medium is usually located in a plane parallel to the lens, cognize as the image plane. Note that the image that is formed is inverted this is usually of no consequence because the display device may easily remediate this condition. The resulting image represents a projection from the three-dimensional object world to the coplanar image world. The focal length specifies the distance from the lens to the image pl ane. more(prenominal) useful to us, it also indicates the degree of magnification of the lens. From 35 mm photography, we go to bed that a lens of 50 mm focal length is considered normal (in the sense impression that the resulting photo will contain the same expanse of image that a human would see from the same point as the camera) one of 28 mm focal length is wide angle, and one of 135 mm focal length is telephoto. For a different film (image) size,those focal lengths would change, nevertheless the principle remains the same.