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Digital Image Processing. Chapter 1: Introduction. What Is Digital Image Processing?. A sample digital image. 662*640*256. y. x.

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## Digital Image Processing

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**Digital Image Processing**Chapter 1: Introduction**What Is Digital Image Processing?**• A sample digital image. 662*640*256. y x**f(x,y): A two-dimensional function, where x and y are**spatial coordinates, and the amplitude of f at any pair of coordinates (x,y) is called the intensity or gray level of the image at that point. • x size: 662, y size: 640, gray levels: 256 • Digital image: x, y, and the amplitude values of f are all finite, discrete quantities**Some applications**• FUJIFILM: Searching faces, Fuji.htm • License plates, Licence.htm • Tracking people, Hand.htm**The Origins of Digital Image Processing**• One of the first applications of digital images was in the newspaper industry, when pictures were first sent by submarine cable between London and New York.**Medical imaging**• Remote Earth resource observations • Astronomy • High-energy plasmas and electron microscopy**Examples of Fields tat Use Digital Image Processing**• Electromagnetic energy spectrum**Fundamental Steps in Digital Image Processing**• Methods whose input and output are images • Methods whose outputs are attributes extracted from those images

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