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Digital Image Processing

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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  1. Digital Image Processing Chapter 1: Introduction

  2. What Is Digital Image Processing? • A sample digital image. 662*640*256. y x

  3. 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

  4. A sample color digital image, 800*600*24 bits

  5. Pixel: The elements of a digital image. Pixels

  6. Some applications • FUJIFILM: Searching faces, Fuji.htm • License plates, Licence.htm • Tracking people, Hand.htm

  7. 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.

  8. Better quality

  9. 15-tone equipment

  10. From computers, meaningful image processing tasks appeared.

  11. Medical imaging • Remote Earth resource observations • Astronomy • High-energy plasmas and electron microscopy

  12. Examples of Fields tat Use Digital Image Processing • Electromagnetic energy spectrum

  13. Gamma-Ray Imaging

  14. X-ray Imaging

  15. Imaging in the Ultraviolet Band

  16. Imaging in the Visible and Infrared Bands

  17. Remote sensing

  18. Weather Observation, visible and infrared bands

  19. Infrared imaging

  20. Automated visual inspection

  21. Imaging in the Microwave Band

  22. Imaging in the Radio Band • MRI

  23. Examples in which Other Imaging Modalities Are Used • Sound

  24. Ultrasound

  25. Electron Microscope

  26. Images generated by computers

  27. Fundamental Steps in Digital Image Processing • Methods whose input and output are images • Methods whose outputs are attributes extracted from those images

  28. Image operations

  29. Spatial filtering

  30. Filtering in the frequency domain

  31. Image restoration

  32. Color image processing

  33. Components of an Image Processing System

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