Image enhancement based on multiple parametric sigmoid functions

  title={Image enhancement based on multiple parametric sigmoid functions},
  author={Go Tanaka and Noriaki Suetake and Eiji Uchino},
  journal={2007 International Symposium on Intelligent Signal Processing and Communication Systems},
In a digital still camera system, a dynamic range is usually compressed linearly in logarithmic space. Therefore, the images taken by the digital still camera tend to be low contrast, and give us a flat impression without the liveliness in comparison with the conventional silver halide photographs. In this paper, we propose a new digital image enhancement method by using multiple parametric sigmoid functions. In the proposed method, intensity conversions by using parametric sigmoid functions… CONTINUE READING

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T. Watanabe
Konnai and Y. Hoshino, “γ Transformation by Sigmoid Function in Digital Camera Printing System,” NIHON GAZO GAKKAISHI, vol.41, no.1, pp.3–10 • 2002
View 4 Excerpts
Highly Influenced

Fundamentals of Digital Image Processing

View 3 Excerpts
Highly Influenced


D. J. Jobson
Rahman and G.A. Woodell, “A Multiscale Retinex for Bridging the Gap Between Color Images and the Human Observation of Scenes,” IEEE Trans. on Image Process., vol.6, no.7, pp.965–976 • 1997
View 2 Excerpts


M. Sakauchi, Y. Ohsawa
Sone and M. Onoe, “Management of the Standard Image Database for Image Processing Researches • 1984
View 2 Excerpts

γ Transformation by Sigmoid Function in Digital Camera Printing System

K. Konnai T. Watanabe, Y. Hoshino
IEEE Trans . on Image Process .

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