Image enhancement based on multiple parametric sigmoid functions

@article{Tanaka2007ImageEB,
  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},
  year={2007},
  pages={108-111}
}
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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