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Scaling Subjective Impressions of Quality

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To assure that the 600 dpi Heidelberg Digimaster 9110 Network Imaging System would deliver best-in-class image quality, extensive image measurement and assessment—including customer surveys and benchmarking—was conducted throughout the engineering and design phases. This process continues for every machine as it rolls through the final assembly area.

A significant contributor to the Digimaster 9110's superior image quality was the development of meaningful image quality specifications and requirements. To develop these specifications, well-designed scaling surveys were of paramount importance. These surveys are the keystones to demonstrating the veracity of virtually all objective image quality measures. Unless an objective measure of quality can be carefully correlated with observers' subjective impressions of quality, the metric's usefulness is limited. That is, without establishing a correlation to visual quality, how is one to know if a new toner formulation, for example, produces a meaningful improvement in line sharpness? This paper discusses the relative utility of the four basic types of scales: nominal, ordinal, interval, and ratio. Methods for determining these scales are given along with fundamentals for designing single- and multiplestimulus scaling experiments. Specific examples are included showing how correlation with the subjective impression of quality was established for several metrics of black text image quality.
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Document Type: Research Article

Publication date: 2000-01-01

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  • 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.

    Please note: For purposes of its Digital Library content, IS&T defines Open Access as papers that will be downloadable in their entirety for free in perpetuity. Copyright restrictions on papers vary; see individual paper for details.

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