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Volume 53 (1990)
- Issue 6 Pages 477-
- Issue 5 Pages 381-
- Issue 4 Pages 291-
- Issue 3 Pages 185-
- Issue 2 Pages 83-
- Issue 1 Pages 1-
Volume 53, Issue 3
Displaying 1-12 of 12 articles from this issue
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[in Japanese], [in Japanese], [in Japanese], [in Japanese], [in Japane ...1990 Volume 53 Issue 3 Pages 185-209
Published: June 28, 1990
Released on J-STAGE: August 11, 2011
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Satoru HONJO, Seiichi TAGUCHI1990 Volume 53 Issue 3 Pages 210-218
Published: June 28, 1990
Released on J-STAGE: August 11, 2011
JOURNAL FREE ACCESSPhotographic systems are optimized to capture and convert actual scenes into the form of highquality hardcopy, while lithographic printing serves to amplify and widely distribute such hardcopies with reasonable price.
Color prints made from color negative film and lithographic prints made from color reversal film are compared from the viewpoint of image quality. Color print is characterized by its excellent tone reproduction capability by use of a set of colorants having broader absorption peaks compared with the colorants for process inks. The former, based on density modulation, has a higher Dmin as well as a higher Dmax while the latter, based on area modulation, is characterized by a less darker appearance with a clean background. Effect of the supporting material on image sharpness is discussed to show that coated papers for lithographic printing can give sharper images than photographic base paper.
Image quality improvements in lithographic print to be realized by larger line densities are also discussed.View full abstractDownload PDF (2763K) -
Toshio MIYAGAWA, Yasuo SHIRAI, Ichiro MORITA, Mineko MORITA, Jiro KITA ...1990 Volume 53 Issue 3 Pages 219-225
Published: June 28, 1990
Released on J-STAGE: August 11, 2011
JOURNAL FREE ACCESSIn the former paper, Miyagawa et al. reported on Kohsai Udagawa's writing on albumen-on-glass photography, entitled “Potokarahii”. Yokusai Ihnuma who lived in Mino was Kohsai Udagawa's real father, and was one of famous scientists in 19th Century. He and his followers tried photography. Among them, his nephew, Ryuh-a Kojima was a tallent photographic technician. He opened a photographic studio in Gifu-ken, which was the first one in this prefecture. In 1873, he made an interesting collage picture composed of his familie's and his own portraits. It could be the oldest one of such kind of pictures in Japan. Yoshihiro Kuze studied photography with Yokusai Ihnuma in the Chemical Institute of the Ohgaki Clan. Reiji Esaki opened his photographic studio in Tokyo. He studied, at first, wet-collodion process, subsequently, he tried to use imported dry plate to take picture of rapid moving objects. In addition to them, he developed collage picture making. He made a surprising one composed of 1700 babies' photographic portraits which were taken with dry plate, in 1893.View full abstractDownload PDF (7621K) -
S. AOYAGI, T. MATSUURA, Y. SHIMA1990 Volume 53 Issue 3 Pages 226-230
Published: June 28, 1990
Released on J-STAGE: August 11, 2011
JOURNAL FREE ACCESSNongelling components of gelatin should be mobile in the gel matrix if they were in sol form. To examine this an electric field was applied to a gelatin gel under the conditions where the gelatin carried sufficient net charge. Polypeptide fractions were obtained in the anodic buffer only if the electricity was introduced. This method might exclude effects of gel solubility on the composition of the extract. SDS electrophoretic analysis showed that the molecular-weight distribution of these extracts was mainly in the range of 10-70 k da. The amino acid composition of 5°C extract was compared to those of Type I collagen and its α2 chain. It could not be concluded to which reference the extract was more similar. We suppose that the electrophoretic extracts are not the same as cold water ones.View full abstractDownload PDF (6050K) -
Shin OHNO1990 Volume 53 Issue 3 Pages 231
Published: June 28, 1990
Released on J-STAGE: August 11, 2011
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Satoru HONJO1990 Volume 53 Issue 3 Pages 232-237
Published: June 28, 1990
Released on J-STAGE: August 11, 2011
JOURNAL FREE ACCESSChanges in viewing conditions for original scenes and hard copies cause the brightness function of human eye to change. When one assumes that the target of tone reproduction in hardcopy is relative brightness reproduction, the HD curve for a hardcopy system must be such as to compensate that kind of change in brightness function. According to Bartleson's treatment, derivations of desirable tone reproduction curves for photographic films will be described together with some expansions to the cases of CG recording.View full abstractDownload PDF (793K) -
Souichi KUBO1990 Volume 53 Issue 3 Pages 238-244
Published: June 28, 1990
Released on J-STAGE: August 11, 2011
JOURNAL FREE ACCESSBasic parameters used to evaluate the image quality of the fine image are explained in this tutorial paper. And a concept of “system-performance” for evaluation of tone and color reproduction on the fine imaging system is considered. The system-performance is defined as the ability of an imaging system to produce fine pictorial images (tonal-image) without any change in the image quality by a change of input illuminance on the image receiver.View full abstractDownload PDF (724K) -
Takao ABE1990 Volume 53 Issue 3 Pages 245-250
Published: June 28, 1990
Released on J-STAGE: August 11, 2011
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Present Level and the Future PossibilityShigeru NAKAMURA, Yasuo AOTSUKA1990 Volume 53 Issue 3 Pages 251-255
Published: June 28, 1990
Released on J-STAGE: August 11, 2011
JOURNAL FREE ACCESSThe response/spatial frequency relation required to obtain an image sharpness enough for pictorial color hard copy is discussed at first, which is followed by an estimate of the level of sharpness achievable in color diffusion transfer process, using a computer simulation technique. The results are summarized below.
1. In a photothermographic system, such as Fujix Pictrography, an outstanding image sharpness is attained because of the shortened diffusion pathway.
2. Two substantial contributing factors on the image sharpness are the rate of dye adsorption to the mordant at the image-receiving layer and the diffusion length of the pathway from dye-releasing site to dye-trapping site.
These computed predictions have been confirmed experimentally in the actual imaging.View full abstractDownload PDF (476K) -
Motohisa TUDA1990 Volume 53 Issue 3 Pages 256-262
Published: June 28, 1990
Released on J-STAGE: August 11, 2011
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Photorearistic Image Generation by Computer GraphicsMasayuki NAKAJIMA, Takeshi AGUI1990 Volume 53 Issue 3 Pages 263-268
Published: June 28, 1990
Released on J-STAGE: August 11, 2011
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[in Japanese]1990 Volume 53 Issue 3 Pages 269-271
Published: June 28, 1990
Released on J-STAGE: August 11, 2011
JOURNAL FREE ACCESSDownload PDF (399K)
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