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Volume 31 (1994)
- Issue 6 Pages 372-
- Issue 5 Pages 322-
- Issue 4 Pages 254-
- Issue 3 Pages 174-
- Issue 2 Pages 102-
- Issue 1 Pages 2-
Volume 31, Issue 4
Displaying 1-5 of 5 articles from this issue
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Trend of High Definission Screening PrintingShizuo MIYANO1994 Volume 31 Issue 4 Pages 254-262
Published: July 31, 1994
Released on J-STAGE: September 27, 2010
JOURNAL FREE ACCESSThe historical background, current situation, and problems of high definition printing are discussed, in particular, a detailed presentation is given of the halftone dot size changes incurred in each stage of the printing process, specifically the process starting with scanner color separation and ending with printing by PS plates. The conclusion is reached that with the increasing use of high definition printing, stochastic printing (FM screen printing), and other high density printing techniques as a means of improving quality, it is imperative to determine which technologies will prevail and to what extent.View full abstractDownload PDF (1349K) -
Colorimetric Characteristics of Finer Screen Ruling PrintsMasahiko YAMAZAKI1994 Volume 31 Issue 4 Pages 263-268
Published: July 31, 1994
Released on J-STAGE: September 27, 2010
JOURNAL FREE ACCESSColorimetric measurements are carried out on the various color samples in order to investigate the influence of the screen rulings. It is noted that in the case of off-press proofs there is not much difference in the colorimetric characteristics between 175 lines/inch and 600 lines/inch, whereas in the case of prints there is bigger difference. It is also noted that the differences caused mainly by the mechanical dotgain of printing inks and optical dotgain has little effects.View full abstractDownload PDF (1380K) -
Theory and Technology of Halftone Printing ProcessesYoshio ONO1994 Volume 31 Issue 4 Pages 269-282
Published: July 31, 1994
Released on J-STAGE: September 27, 2010
JOURNAL FREE ACCESSPrinciples of halftone screening methods with conventional halftone screens and both rational and irrational tangent types of halftone dot generators are described. Quality problems of halftone images produced by dot generators and methods of fixing them, tone reproduction of halftone processes and dot gain of printed halftone images, features of ultra-fine screens and FM screens such as increase of resoulution and color saturation and elimination of moire, etc, are also discussed.View full abstractDownload PDF (4262K) -
Masayuki NAKAJIMA, Kiyoshi MIWA1994 Volume 31 Issue 4 Pages 283-289
Published: July 31, 1994
Released on J-STAGE: September 27, 2010
JOURNAL FREE ACCESSHuman hair rendering is one of the difficult theme in CG because the number of hair is enormous and the hair size has very thin figure. Furthermore the style is very different individually and easily changeable by external force. In this paper, the beautiful hair rendering algorithm using thread model and area anti-aliasing is shown. We compare the CG image made by our method with the CG images generated by Z buffer algorithm.View full abstractDownload PDF (2187K) -
6. CEPS-Image Input/Output TechnologyMakoto HIROSAWA1994 Volume 31 Issue 4 Pages 290-297
Published: July 31, 1994
Released on J-STAGE: September 27, 2010
JOURNAL FREE ACCESSThe technology of color scanner with its appearance electronic prepress began, is introduced. A color scanner's configuration, as a stand-alone system and also as an image input device and an output device for CEPS (Color Electronic Prepress System) is shortly reviewed. The typical methods of image input and recording are overviewed with the principle for halftone screening. Image processing technology including RGB/CMYBk color conversion, sharpness enhancement, tone and color correction, etc. is indispensable for prepress scanner to achieve high quality imaging.View full abstractDownload PDF (2346K)
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