Image contrast enhancement based on the piecewise-linear approximation of CDF

Image contrast enhancement based on the piecewise-linear approximation of CDF

We present a new image contrast enhancing method based on the piecewise-linear approximation of the cumulative density function (CDF). Reduced hardware is required for CDF calculation, since the number of bins is greatly reduced thanks to this approximation. With the proposed method, various contras...

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Veröffentlicht in:IEEE transactions on consumer electronics 1999-08, Vol.45 (3), p.828-834
Hauptverfasser: Kim, Sang-Yeon, Han, Dongil, Choi, Seung-Jong, Park, Jong-Seok
Format: Artikel
Sprache:eng
Schlagworte:
Approximation
Brightness
Consumer electronics
Controllability
Density
Digital TV
Electronics
Equalization
Hardware
Histograms
Image contrast
Mathematical analysis
Piecewise linear approximation
Piecewise linear techniques
Pixel
Videoconference
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Beschreibung
Zusammenfassung:We present a new image contrast enhancing method based on the piecewise-linear approximation of the cumulative density function (CDF). Reduced hardware is required for CDF calculation, since the number of bins is greatly reduced thanks to this approximation. With the proposed method, various contrast enhancing effects can be implemented such as histogram equalization, partial or entire histogram modification.
ISSN:0098-3063
1558-4127
DOI:10.1109/30.793618