Digital Image Processing (3rd Edition)

• 侃大海

  2021-01-02
  an image can be smoothed by attenuating the high-frequency components of its Fourier transform. Because edges and other abrupt changes in intensities are associated with high-frequency components, image sharpening can be achieved in the frequency domain by highpass filtering, which attenuates low-frequencies components without disturbing highfrequencies in the Fourier transform.
• 百万de心Logos

  2016-06-05
  due to storage and quantizing hardware considerations, the number of intensity levels typically is an integer power of 2..
• 百万de心Logos

  2016-06-05
  This digitization process requires that decisions be made regarding the values for M, N, and for the number, L, of discrete intensity levels.
• 百万de心Logos

  2016-06-05
  f(x, y) is a digital image if (x, y) are integers from z2 and f is a function that assigns an intensity value to each distinct pair of coordinates(x, y).
• 百万de心Logos

  2016-06-05
  The section of the real plane spanned by the coordinates of an image is called the spatial domain, with x and y being referred to as spatial variables or spatial coordinates.
• 百万de心Logos

  2016-06-05
  The quality of a digital image is determined to a large degree by the number of samples and discrete intensity levels used in sampling and quantization.
• 百万de心Logos

  2016-06-05
  Incoming energy is transformed into a voltage by the combination of input electrical power and sensor material that is responsive to the particular type or energy being detected.
• 百万de心Logos

  2016-06-02
  As a consequence, f(x,y) must be nonzero and finite; that is 0< f(x,y) < infinite
• 百万de心Logos

  2016-05-30
  The field of digital image processing refers to processing digital images by means of a digital computer