Gamma Transformation (Tone Rescaling)by Sigmoid Function (II): Subjective Estimation by Paired Comparison
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.
Document Type: Research Article
Publication date: 2001-01-01
For more than 30 years, IS&T's series of digital printing conferences have been the leading forum for discussion of advances and new directions in 2D and 3D printing technologies. A comprehensive, industry-wide conference that brings together industry and academia, this meeting includes all aspects of the hardware, materials, software, images, and applications associated with digital printing systems?particularly those involved with additive manufacturing and fabrication?including bio-printing, printed electronics, page-wide, drop-on-demand, desktop and continuous ink jet, toner-based systems, and production digital printing, as well as the engineering capability, optimization, and science involved in these fields. In 2016, the conference changed its name formally to Printing for Fabrication to better reflect the content of the meeting and the evolving technology of printing.
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