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Volume 61 (1998)
- Issue 6 Pages 328-
- Issue 5 Pages 261-
- Issue 4 Pages 207-
- Issue 3 Pages 125-
- Issue 2 Pages 72-
- Issue 1 Pages 3-
Volume 61, Issue 6
Displaying 1-9 of 9 articles from this issue
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Moriya KATAGIRI1998 Volume 61 Issue 6 Pages 328-331
Published: December 25, 1998
Released on J-STAGE: August 11, 2011
JOURNAL FREE ACCESSNew Shaft Drive Mechanism consists of crossed helical gears and long shafts instead of generally used spur gears. This Shaft Drive Mechanism has been adopted as a part of the film transport system. As a result Shaft Drive Mechanism made the downsizing and various design of camera possible.View full abstractDownload PDF (2858K) -
Minoru ISHIGURO1998 Volume 61 Issue 6 Pages 332-335
Published: December 25, 1998
Released on J-STAGE: August 11, 2011
JOURNAL FREE ACCESSThe operability is of great importance with regard to entry of the number of prints and captions which is one of the significant features of APS cameras. The adoption of multiple functioncards made the APS camera unprecendented with taking full advantage of the features and yielded easy entry of the numbers of prints and captions.View full abstractDownload PDF (382K) -
Yoshinobu KUDO1998 Volume 61 Issue 6 Pages 336-342
Published: December 25, 1998
Released on J-STAGE: August 11, 2011
JOURNAL FREE ACCESSThe description of defocused image area (i.e., foreground and background description) has needed to be improved as there have been a lot of lens which have good description at focusing area though rough description at defocusing area such as unnaturally overlapped images. We examine the imageformation condition for smooth description of defocusing image and analyze factors that make rough description of defocused image. Then we study and compare the design methods to improve smoothness of defocusing image. On the basis of the studies above, with the 135 mm system interchangeable STF 135 mm f/2.8 (t/4.5), we have tried to improve defocusing image description and confirmed the remarkable effects.View full abstractDownload PDF (9539K) -
Design of Image Acquition SystemYasuaki YOKOYAMA, Takayuki HASEGAWA, Norimichi TSUMURA, Hideaki HANEIS ...1998 Volume 61 Issue 6 Pages 343-355
Published: December 25, 1998
Released on J-STAGE: August 11, 2011
JOURNAL FREE ACCESSWe developed new color management system for high accurate color recording and reproduction of art paintings. This system is consisted of high accurate multi-band digital camera, personal computer and display system instead of conventional silver-halid photographic system. The multi-band camera is composed by five band optical filters and a monochrome type CCD area sensor. The reflectance spectra of each pixel of the object were estimated by using five band images. The spectral transmittances of separation filters were determined by simulated annealing method and principal component analysis of spectral reflectance of paintings. Images of art paintings obtained by these image acquiring method were reproduced onto the display system under the consideration of human color appearance. In this paper, we describe methods to estimate of reflectance spectra of paintings from five band images, optimization of spectral transmittance of filters.View full abstractDownload PDF (14421K) -
Color Reproduction Based on Human PerceptionYasuaki YOKOYAMA, Asako HOSOI, Norimichi TSUMURA, Hideaki HANEISHI, Yo ...1998 Volume 61 Issue 6 Pages 356-362
Published: December 25, 1998
Released on J-STAGE: August 11, 2011
JOURNAL FREE ACCESSWe have developed a new color management system based on recording of refelection spectra of object and color appearance models. In a previous paper, high accurate multiband image acquisition system and algorithm for estimation of reflection spectra of the object used principal component analysis and Wiener estimation method were described. In this paper, three color appearance models, von Kries, CIELAB and Fairchild were applied to predict the color reproduction of oil paintings onto a CRT and projection type monitor. As a result, it was shown that the Fairchild model is significant for prediction of color reproduction of oil paintings.View full abstractDownload PDF (10414K) -
Influence of Average Molecular Weight and Hardening of Gelatin on Image Quality of Dichromated Gelatin Phase HologramShin WATANABE, Nobuo MII, Kenichi KUGE, Shusuke KATOH, Shingo TSUCHIDA ...1998 Volume 61 Issue 6 Pages 363-371
Published: December 25, 1998
Released on J-STAGE: August 11, 2011
JOURNAL FREE ACCESSDependence of the average molecular weight of gelatin and the pre-hardening of gelatin layer on the image quality of dichromated gelatin phase hologram have been investigated. The average molecular weight of gelatin was controlled by mixing two gelatins possessing widely different molecular weight distribution. Pre-hardening of gelatin layer were performed either by an acid hardening fixing bath or by adding mucochloric acid (MCA) into the gelatin solution. Reflection diffraction gratings were recorded on the dichromated gelatin plate with argon-ion laser operating at 488 nm and the image quality were evaluated with diffraction efficiency and SN ratio.
By hardening with acid hardening fixing bath, both diffraction efficiency and SN ratio have increased and then decreased with increasing estimated relative average molecular weight of gelatin that hardened.
On the other hand, the gelatin layer hardened with the most effective amount of MCA have showed further hardening with Cr (III), and higher diffraction efficiency and higher SN ratio have been obtained at higher molecular weight of gelatin.View full abstractDownload PDF (981K) -
Dependence on Sulfur SensitizersHiroyuki MIFUNE, Yuji YOSHIDA1998 Volume 61 Issue 6 Pages 372-383
Published: December 25, 1998
Released on J-STAGE: August 11, 2011
JOURNAL FREE ACCESSMono-dispersed cubo-octahedral silver bromide grains were digested with three different sulfur sensitizers, and crystal-face selectivity of latent image centers was determined by means of arrested development. Under the condition of low-intensity exposure, latent image centers were formed entirely on {111} face of moderately digested grains with all the sulfur sensitizers examined. Under optimum and over-digested condition, the grains sensitized with sodium thiosulfate had latent image centers on their {111} face, while those sensitized with triethyl thiourea and 3-ethyl-5-benzylidene rhodanine had latent image centers preferentially on their {100} face. It was discovered that the crystal-face selectivity of the location of latent image centers was affected by the kind of sulfur sensitizers and degree of digestion for sulfur sensitization. The amount of silver sulfide formed was measured by use of radio-active 35S-labeled sensitizers. Desensitization caused by cyanine dyes on cubo-octahedral AgBr grains was much weaker when latent image centers were formed on {100} face than on {111} face. The above-stated observations lead to the proposal of the following mechanism. The formation of effective sulfur sensitization centers from silver sulfide is faster on {111} face than on {100} face. However, a sulfur sensitization center on {100} face acts more effectively than that on {111} face for competition of latent image formation.View full abstractDownload PDF (10460K) -
Akira HASEGAWA, Nobuyuki MITSUHASHI, Takashige OMATSU, Mitsuhiro TATED ...1998 Volume 61 Issue 6 Pages 384-386
Published: December 25, 1998
Released on J-STAGE: August 11, 2011
JOURNAL FREE ACCESSThe accuracy of measurement needed to measure the microwave conductivity of emulsion microcrystals was examined.The commercial network analyzer satisfied the demanded high accuracy of measurement (the frequency measurement by the significant figure of seven digits).The way to the practical use of the microwave conductivity measurement method was found.View full abstractDownload PDF (318K) -
O. V. MIKHAILOV, A. I. KHAMITOVA, M. A. KAZYMOVA1998 Volume 61 Issue 6 Pages 387-393
Published: December 25, 1998
Released on J-STAGE: August 11, 2011
JOURNAL FREE ACCESSThe formation processes of silverless photographic images consisting of Ni (II) chelates with (N, N, S, S)-donoratomic ligand-2, 8-dithio-3, 7-diaza-5-oxanonandithioamide-1, 9 from an initial silver image on silver halide photographic layers by three-stage chemical processing (bleaching, fixing and toning) have been studied.It has been noticed that the process indicated allows to increase the optical densities and photographic sensitivity considerably compared with ones for an initial silver image.D=f (DAg) curves (where Dis a density of silverless image obtained from an original silver image having DAg density) have been presented.It has been indicated that the process studied can be used for amplification image on the silver-halide photographic materials.View full abstractDownload PDF (895K)
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