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Digital Image Processing

Image Enhancement in the

Frequency Domain

Enhance: to make greater (as in value, desirability or attractiveness)

Frequency: The number of times that a periodic function repeat the same sequence of values during a unit variation of the independent variable

Webster’s new collegiate dictionary

Lecturer : Ali Rezaee

Periodic FunctionsFourier’s idea in 1807 that periodic functions could be represented as a weighted sum of sines and cosines.

Introduction to Fourier Transform and Frequency Domain

The One-Dimensional Continues Fourier Transform and its Inverse

Introduction to Fourier Transform and Frequency Domain

The Two-Dimensional Continues Fourier Transform and its Inverse