Human visual resolution was measured in details for the three primary colors in the analog TV. However, these results are not suitable for the hardcopy printers that print out half-tone images by using digital fine dots of the three primary color inks. So, we measured the minimum print dots that we can distinguish for each space frequency, and constructed the digital visual resolution. Furthermore, we recomposed the digital fine dot images recognized through eye by using the Fourier transform and the analog visual resolution, and made clear that the fine dots are transformed the image density.

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The image of analog color TV has been analyzed by using the human visual resolution for three primary colors. However, these analysis results are not suitable for the hardcopy image that is recorded by using digital color fine dots. So, we measured the human visual resolution for digital fine dots, and got the minimum dot size that we can distinguish individual dot in each space frequency. Otherwise, we formed the reconstruction image by using the analog visual resolution and the Fourier transform, and analyzed the dither pattern image noise and quality. Further, we checked the influence that smooth edge dots or Error Diffusion Image method exert on the image quality.

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In an imaging system, expression of contours in image is very important. Because it influences the image quality. The contour is important in human visual system. It is significant to understand contour perception condition. In this study, stepwise density change patterns of various step and width are prepared, and subjective evaluation of the step perception of the pattern is carried out at seven kinds of observation distance and two levels of brightness. The ratio of feeling the contour or a step in each condition is obtained. From the result, as for the perception ratio it is found that step width gave big influence than the density jump. It is obtained that contour or step is not perceived if the density constant area disappears.

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The trend of office innovation so called “alternative officing” accompanying advances in information technology took off in early 1990s. This paper first describes the trends of new and innovative work environments supporting various workstyles, new business models, and knowledge creating activities. Then, future directions of workplace design is explored.

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The rapid progress of the IT environment represented by the spread of Internet communications has had a large influence on business activities in Japan. It is necessary to aim at the change of the whole industry in the face of progress in IT, changes of various systems and customs, and global mega competition. It is a change from manufacturing toward the creation of “new knowledge,” which is structured by large amounts of various information and interests. Based on this “new knowledge” the importance of offering worthy products and services has increased, while utilizing IT as a tool in these processes. It is expected that this will lead to the enhancement of the industrial competitiveness of Japan and the creation of new industries. In response to such a background, the Japan Business Machine and Information System Industrial Association studied the ideal future for offices, and this report presents these results as “Ubiquitous workware and collaboration”

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Changes in the business environment have prompted a major evolution of work styles. Many enterprises have seen their business processes totally transformed by the information and financial revolutions that began around 1980, and change has been driven further forward by a shift in marketing needs that has accompanied the maturing of the economy and society, to more focus on the value of “soft” endeavor rather than hard products. Work styles and organizational management conducive to efficiency and creativity are essential for enabling working individuals to generate new knowledge and innovate new products and services. For those of us involved in office innovation, the issue is How can office environments best facilitate such work styles? In this paper, I intend to draw on several advanced case studies to explore what offices of tomorrow will be like.

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This is introduction of the ORPHIS HC5500 that has made possible the flexible response of the changes in the social and business environment as for small to large office printer.
ORPHIS HC5500 is line ink jet printer that is using ink jet technology, 120 page/minuets A4 landscape simplex and 48 page/minuets duplex print speed, low running cost. (2.5yen/page:A4 Shingle Pass CKMY Each 5%)
This report is explanation of the machine main technology and introduction of the ORPHIS HC5500 function.

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70 years have passed since C.F. Carlson invented the “Carlson Process” which was still the mainstream of electrophotographic process.
The electrophotographic process, which was invented in order to make the office worker's job more efficient, has now been the most major way of imaging technology after the various development in the changing environment (like digitalization). It has been developed further and further as the requisite way to achieve the “solution”. And, thanks to the 4 drums-tandem system and intermediate transferring system which are the architecture for digital color copier/printer, it has also evolved into the technology which can be efficiently adopted in the printing market.
In this thesis, the history of the electrophotographic process is reviewed, its relation with the other imaging process, innovative technology, and electronic recording technology is reviewed, and then the future possibility and outlook of electrophotographic process is summarized.

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