Digital Image Processing Lecture 2: Image Definition and Applications
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Questions and Answers

What is the definition of an image in the context of digital image processing?

  • A two-dimensional function (correct)
  • A four-dimensional function
  • A three-dimensional function
  • A one-dimensional function

    • How is the intensity or gray level of an image at a specific point defined?

  • By the amplitude of the function f at that point (correct)
  • By the frequency of occurrence of colors
  • By the number of neighboring pixels
  • By the size of the pixel

    • What do we call an image when x, y, and the amplitude values of f are all finite, discrete quantities?

  • A digital image (correct)
  • A grayscale image
  • A vector image
  • An analog image

    • What are the elements referred to as in a digital image?

    <p>Image elements and pels</p> Signup and view all the answers

    What are the principal application areas that generate interest in digital image processing methods?

    <p>Improvement of pictorial information for human interpretation</p> Signup and view all the answers

    What are some sources for digital images mentioned in the text?

    <p>Electromagnetic and electronic images</p> Signup and view all the answers

    What is the definition of a digital image?

    <p>A two-dimensional function with spatial coordinates x and y</p> Signup and view all the answers

    What does a digital image processing cover?

    <p>Low-, mid-, and high-level processes</p> Signup and view all the answers

    What do the numbers in a digital image indicate?

    <p>Variations of red, green, and blue at a particular location on a grid of pixels</p> Signup and view all the answers

    What are the elements of a digital image often referred to as?

    <p>Pixels</p> Signup and view all the answers

    What term is used to refer to the finite, discrete quantities of x, y, and the amplitude values of f in a digital image?

    <p>Pixel elements</p> Signup and view all the answers

    In the context of digital image representation, what do the numbers in a digital image indicate?

    <p>Variations of red, green, and blue at a particular location</p> Signup and view all the answers

    What are picture elements, image elements, pels, and pixels collectively referred to as in a digital image?

    <p>Pixel elements</p> Signup and view all the answers

    What are the principal application areas generating interest in digital image processing methods as mentioned in the text?

    <p>Processing images for autonomous machine perception</p> Signup and view all the answers

    Which energy spectrum is mentioned as a source for digital images in the text?

    <p>Electromagnetic (EM) energy spectrum</p> Signup and view all the answers

    What are the finite number of elements in a digital image referred to as according to the text?

    <p>Pixel elements</p> Signup and view all the answers

    What are the main differences between low-level, mid-level, and high-level processes in digital image processing?

    <p>Low-level processes involve inputs and outputs as images, mid-level processes involve recognition of individual objects, and high-level processes involve attributes extraction.</p> Signup and view all the answers

    What does a digital image consist of in terms of spatial coordinates and amplitude?

    <p>A digital image consists of x and y as spatial coordinates and the amplitude as intensity or grayscale level at a point (x, y).</p> Signup and view all the answers

    What is the primary definition of a pixel in the context of a digital image?

    <p>A pixel is a numeric value indicating variations of red, green, and blue at a specific location on an image grid.</p> Signup and view all the answers

    What is the primary purpose of digital image processing?

    <p>The primary purpose is to analyze digital images to extract information for pattern recognition and object identification.</p> Signup and view all the answers

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