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Volume: 17 | Article ID: art00079_2
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Gamma Transformation (Tone Rescaling)by Sigmoid Function (II): Subjective Estimation by Paired Comparison
Yoshitaka Iwasaki
Takashi Yamaguchi
Takashi Watanabe
Yasushi Hoshino
  DOI :  10.2352/ISSN.2169-4451.2001.17.1.art00079_2  Published Online :  January 2001
Abstract

The digital technology is greatly developed in recent years. In the world of a photograph, the information of image is digitized and the digital image technology centering on a computer is progressing with the spread of the digital still cameras. In this research, tone rescaling of a digital image is performed using sigmoid function. It is found that the tone rescaling by sigmoid function improves the image quality when the peak position of the slope of sigmoid function is adjusted to the peak of histogram of region - of - interest. The improvement of the image quality is confirmed by subjective estimation.

Journal Title : NIP & Digital Fabrication Conference
Publisher Name : Society of Imaging Science and Technology
Publisher Location : 7003 Kilworth Lane, Springfield, VA 22151, USA
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 DOI 10.2352/ISSN.2169-4451.2001.17.1.art00079_2
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Yoshitaka Iwasaki, Takashi Yamaguchi, Takashi Watanabe, Yasushi Hoshino, "Gamma Transformation (Tone Rescaling)by Sigmoid Function (II): Subjective Estimation by Paired Comparison"  in Proc. IS&T Int'l Conf. on Digital Printing Technologies (NIP17),  2001,  pp 789 - 791,  https://doi.org/10.2352/ISSN.2169-4451.2001.17.1.art00079_2

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NIP & Digital Fabrication Conference
nip digi fabric conf
2169-4451
Society of Imaging Science and Technology
7003 Kilworth Lane, Springfield, VA 22151, USA
2169-4451(20010101)2001:2L.789;1-
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Articles
Gamma Transformation (Tone Rescaling)by Sigmoid Function (II): Subjective Estimation by Paired Comparison
IwasakiYoshitaka
YamaguchiTakashi
WatanabeTakashi
HoshinoYasushi
01012001
2001
2
789
791
2001
The digital technology is greatly developed in recent years. In the world of a photograph, the information of image is digitized and the digital image technology centering on a computer is progressing with the spread of the digital still cameras. In this research, tone rescaling of a digital image is performed using sigmoid function. It is found that the tone rescaling by sigmoid function improves the image quality when the peak position of the slope of sigmoid function is adjusted to the peak of histogram of region - of - interest. The improvement of the image quality is confirmed by subjective estimation.