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Volume 56 (1993)
- Issue 6 Pages 411-
- Issue 5 Pages 351-
- Issue 4 Pages 259-
- Issue 3 Pages 167-
- Issue 2 Pages 104-
- Issue 1 Pages 3-
Volume 56, Issue 2
Displaying 1-8 of 8 articles from this issue
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Nobuo KUBO, Norihisa KOBAYASHI, Koji IKEDA, Ryo HIROHASHI1993 Volume 56 Issue 2 Pages 104-110
Published: April 25, 1993
Released on J-STAGE: August 11, 2011
JOURNAL FREE ACCESSThe copolymer composed of (ω-methoxy) oligo (oxyethylene) methacrylate and spiropyran methacrylate has been prepared. Spiropyran group showed reversible isomerization in this polymer film upon photoirradiation. The ionic conductivity in this film doped with LiClO4 gradually decreased upon UV irradiation and subsequently increased upon Vis irradiation. Reversible change of ionic conductivity by photoirradiation is in good correlation with the change in absorbance assignable to photomerocyanine-form (PMC-form). This change is revealed to be attributed to the aggregation between dyes (PMC-form and/or spiro-form). The glass transition temperature (Tg) for this film increased by UV irradiation. This behavior indicates that the aggregation between dyes acts as quasi-crosslinking point in solid matrix. The progress of this aggregation brought about the change in ionic mobility. Thus, the ionic conductivity can becontrolled by photoirradiation in the solid polymer electrolyte.View full abstractDownload PDF (891K) -
Shin OHNO1993 Volume 56 Issue 2 Pages 111
Published: April 25, 1993
Released on J-STAGE: August 11, 2011
JOURNAL FREE ACCESSDownload PDF (126K) -
Po-Chieh HUNG1993 Volume 56 Issue 2 Pages 112-122
Published: April 25, 1993
Released on J-STAGE: August 11, 2011
JOURNAL FREE ACCESSA novel colorimetric calibration method for four color printers using yellow, magenta, cyan and black (YMCK) is proposed. In order to determine a unique combination of YMCK, a new concept, that a four dimensional solid spanned by YMCK is projected into three dimensional color space, is introduced. Based on the concept, two categories of criteria are proposed: Three Variable method and Solid Division method. By introduction of the criteria, the number of dimension is reduced to three, and it allows us to use a conventional colorimetric calibration technique.
Also, the gamut sizes of four printers in various conditions are compared in a uniform color space by characterization of YMCK printers with four dimensional look-up-tables. In conclusion, it has been found that ;
(a) Colorimetric calibration can be performed with both methods.
(b) The Three Variable method, which includes conventional YMCK decision techniques, will loose the dark part of the entire color gamut by YMCK. And the shape of the gamut varies depending upon the choice of functions that determine new YMCK values from old YMC values.
(c) The Solid Division method can utilize the entire color gamut along with colorimetric calibration.View full abstractDownload PDF (4230K) -
A Fundamental Study on Preferred Chromaticity of SkinHideaki HANEISHI, Masahiro MYODO, Yoichi MIYAKE1993 Volume 56 Issue 2 Pages 123-127
Published: April 25, 1993
Released on J-STAGE: August 11, 2011
JOURNAL FREE ACCESSAs the first step for preferred color reproduction in hard copy a distribution of the preferred chromaticity of mongoloid skin was investigated. Two portraits were digitized and various samples were generated by changing the color of background and/or skin area of those original images. From the subjective rating experiments using those samples, following results were obtained. 1) Preferred skin colors by five observers are very similar. 2) Preferred samples are independent of the kind of viewing illumination. 3) Preferred skin color depends on neither color nor luminance of the background if it is uniform. 4) The preferred skin colors for two pieces of girl images are similar. 5) In the every experiment, the area of chromaticity giving acceptable color reproduction was wide in the direction of chroma and narrow in the direction of hue.View full abstractDownload PDF (2460K) -
John LARISH1993 Volume 56 Issue 2 Pages 128-131
Published: April 25, 1993
Released on J-STAGE: August 11, 2011
JOURNAL FREE ACCESSAfter six years of continuous effort, electronic photography is beginning to make progress, especially in industrial and commercial photo applications. For industrial locations, electronic photography has been a way of controlling environmental concerns as well as a way of creating greater cost efficiency.
For commercial studios, digital still photography has allowed the direct input of product photography ready for placing in a final page, saving up to a week of production time in many cases.
There is some usage in the photo journalism market of the electronic still image because of the speed of image availability and the ease of transmitting images. Early efforts were slowed because many felt that the image produced lacked resolution. More importantly, the exposure index of the analog systems was considerably under the exposure index 400 to 1600 films commonly used. New digital cameras from Kodak have come closer in meeting the needs of photo journalists both in resolution and exposure speed.View full abstractDownload PDF (6454K) -
Yasuhiro KOMIYA, Kangda WANG1993 Volume 56 Issue 2 Pages 132-137
Published: April 25, 1993
Released on J-STAGE: August 11, 2011
JOURNAL FREE ACCESSFor handling high resolution pictures like hard copy, the method of image acquisition is one of the principal problem. We are developing a device which can obtain high resolution image using multi ordinary sensors. The basic method is that several images, taken by multi area sensors, are connected each other. In the image connection, first the correlation of position (transfer and rotation) in these images is detected, then the images are interpolated by this correlation. For simplifying the interpolation processing in hard, block partition in distance to the pixel is proposed. The image enhancement will be applied to improve image contrast after the interpolation. Also, a seamless processing for the connection is used.View full abstractDownload PDF (4442K) -
Satomi TANAKA1993 Volume 56 Issue 2 Pages 138-143
Published: April 25, 1993
Released on J-STAGE: August 11, 2011
JOURNAL FREE ACCESSCCD imaging chip is the most important component device of the electronic Still Video Camera (SV camera). Generally, there is a remarkable correlation of iamge quality with the number of CCD imaging chips. We, SONY corporation, have produced the mono-CCD-imager SV camera in 1987, and from then, have proceeded to the multiplization of CCD imaging chips for the purpose of improvement of the image quality. Therefore, we could accomplish several achievements untill now.
This paper deals with the specification of multiplized CCD imaging chips in the case of SV camera, making a comparison with the two different type products. One is the 2-CCD chip camera (Lumin-ance separation type)-production code: MVC-5000, the other is the 3-CCD chip camera (Color separation type): MVC-7000.View full abstractDownload PDF (3345K) -
Masahiro KONISHI, Masafumi INUIYA, Makoto MURAKOSHI1993 Volume 56 Issue 2 Pages 144-147
Published: April 25, 1993
Released on J-STAGE: August 11, 2011
JOURNAL FREE ACCESSDownload PDF (451K)
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