Acquisition of a multispectral image and analysis of the object based on spectral information has recently received attention in the field of digital archiving of cultural assets. However multispectral imaging faces such problems as long image acquisition time and difficulties in registration between band images. In order to solve these problems, we have proposed an extended method combining Bayesian image super-resolution with spectral reflectance recovery. In this study we evaluated quantitatively the performance of the proposed technique using a typical 6-band multispectral scanner and a Japanese painting. The accuracy of recovered spectral reflectance was investigated with respect to the ratio of the capturing resolution to the recovering resolution. The experimental result indicated that the spatial resolution can be increased by around 1.7times, which means image capturing time can be reduced almost by one third and besides the angle of view can be extended by 1.7times.
We have recently discovered a novel and easy method for preparing colored Ag films using an aqueous solution of sulfide as a coloring agent. In the presence of specific sulfide, the color of Ag films, initially silver, changes to yellow, red, and blue depending on the preparation conditions. It is of great scientific interest to elucidate the mechanism of the color change of the Ag films. In order to address the mechanism, these Ag films and Ag nanoparticles have been characterized in terms of their surface morphology, particle size and chemical compositions by scanning electron microscopy, transmission electron microscopy and X-ray photoelectron spectroscopy. As the results, we conclude that the color change of our Ag films comes from not surface plasmon resonance of due to the particle size change of the Ag nanoparticles but the thin film interference between Ag and Ag2S layers.
The focus of this present work is to develop a novel security paper sheet which includes Kapok fibers containing solid fluorescence particles inside. The Kapok fibers are natural half transparent hollow tubes whose inner and outer diameters are 18 and 20µm respectively. The fibers exhibit superior water repellent properties and absorb oil due to capillary force. Furthermore, the fibers have high hollow rate. In general, synthetic fibers have hollow rate of about 50%, however, those of Kapok fibers are over 80%. In this paper, we tried to make Kapok fibers containing solid fluorescence particles inside, and a paper sheet containing the composite fibers as described above. We found the paper sheet exhibits strong luminescent. The Kapok fibers including solid fluorescence particles have a beneficial effect on anti-counterfeit technologies.
Although 20 years have passed since the appearance of Print On Demand (POD), it has not spread as quickly as its creators had expected. The reasons are assumed to be (1) Inadequate digital data, (2) Poor quality of POD, and (3) Improvement of offset printing system. Now these disadvantages are disappearing rapidly. It is thought that the POD market will grow, as the current printing market is getting smaller. This article discusses the present and future situation of each transactional, commercial, publishing, photographic and packaging POD market. POD is compelled to compete with the Internet, which is the ultimate variable message medium, but POD will form a unique market by using paper materials. From now on, POD should make inroads into the offset printing market not only through the utilization of promptness and variability, but also via its ecological performance. The development of POD is expected to move in this direction.
Among growing digital publishing market, continuous feed requires high speed, low running cost and medium printing quality resulting inkjet technology to be especially suitable. Fuji Xerox Co., Ltd. has been introduced 2800 ICCFPS which prints 200 meter/minute with intensive design prioritizing high speed compact and 1400 ICCFPS which prints 100 meter/minute with dispersal design prioritizing cost reduction. To explain adopted technologies for each fixture, common structures are classified as following main four components;1) Machine with paper feeding, 2) Printhead, 3) Ink, ink handling and maintenance, 4) Controller, and then, required characteristics and employed enabling technologies are described. Regarding advances on inkjet technology, speed limit of jetting, drying for water based ink, and possible extensions into the publishing market are discussed. Although inkjet has been stagnated recently, it is time to take a great leap forward by the entry into new market where is publishing.
Océ announced Océ VarioPrint 6000 Ultra line in 2009. This is a black & while production printer, up to 314 A4 image per minute. Productivity is more than just speed alone. For a customer the only thing that counts is the amount of jobs he can produce in reality. Therefore, productivity can be seen as the sum of throughput/speed, quality, reliability and ease of use. Océ developed Océ Gemini technology from Copy Press technology which is their core technology for decades. Gemini Instant Duplex enables high speed B/W duplex print, very high front to back registration accuracy, and less paper jam. The Océ PRISMAsync controller is now Océ's common controller platform for all printers, black/white and color. With its new technologies and unique features, Océ VarioPrint 6000 Ultra Line let them see new applications transferring from offset to digital printing, and transaction print.
RICOH Pro C751 EX/C651EX is the digital full color printer to enhance the lineup of the production printer of Ricoh with RICOH Pro C901 series, and to correspond to market demand of various kinds of print objects, small lot print, and quick delivery. The main features of this printer are 1) Prints at the speed of 75ppm (C751EX) /65ppm (C651EX) (A4 LEF, 52.3-220gsm) 2) Consistent high quality out-put (ATDC, Accurate paper skew adjustment and registration by VCSEL technologies) 3) Keep high productivity (Large capacity tray unit, Liquid cooling system) 4) Technology of Media capability (shock-jitter canceling system, integrated media setting system)
Konica Minolta's bizhub PRESS C8000 is a color digital printing system targeting a full-scale production printing market. It features high-speed, high-reliability and durability as well as an enhanced adaptability to media variety such as coated paper specialized to the offset print. In this report, several elemental technologies and distinctions of the product are introduced by referring to our strategic concept, “relief, simplicity and comfort”. The first, “relief” means an excellent reliability. Improvements of the paper feeding and transporting units, the laser optics and the EP process are introduced by correlating to the concept. The second, “simplicity” realizes well-above techniques and experiences of a print master with a simple handling. Image processing, an image density control system and a color management system are introduced. At the end, “comfort” helps complex print jobs to be finished effectively without failure. Finishing equipments, workflow applications and a design technique to produce comfortable usage are mentioned.
Recently a proposal-based sales promotion like personalized direct mail, which uses a full color production printer based on inkjet technology, has become much popular. This has been realized and helped by improvements of printing system which are higher quality, higher productivity and lower cost. There is an issue, however, how to guarantee quality and data integrity of printed matters which consist of variable data. In this paper I review the features of Truepress Jet520 series which are the best selling-printers in high speed full color production category. Then I introduce an inline inspection system, Jetinspection, and try to explain how to resolve the issue raised.