日本写真学会誌
Online ISSN : 1884-5932
Print ISSN : 0369-5662
ISSN-L : 0369-5662
55 巻, 6 号
選択された号の論文の6件中1~6を表示しています
  • フェルメールのカメラ・オブスクーラ使用を中心に
    中村 光一
    1992 年 55 巻 6 号 p. 429-435
    発行日: 1992/12/28
    公開日: 2011/08/11
    ジャーナル フリー
    Johannes Vermeer (1632-1675), a Dutch painter of everyday life in 17th century Holland, constructed works of art completely different from other painters of his day. The hypothesis that Vermeer used the forerunner of the modern photographic 'camera, the camera obscura as an aid in making his paintings has been repeatedly submitted since the revaluation of his art in the late 19th century. Although historical sources indicate contemporary interest in the camera obscura, they do not specifically document Vermeer's use of this device. The main purpose of this study is to examine whether this hypothesis can be substantiated. Because a camera obscura leaves few physical traces on the painting, one must rely on an interpretation of the image to determine whether it exhibits characteristics derived from the use of a camera obscura. Upon close examination, a number of optical effects visible in the camera obscura are found in at least some of his paintings. They are the accentuated perspective, hightened colors, contrasts of light and dark, halation of highlights, and vignetting effects.
    The secret of Vermeer's art is, however, not that he used the camera obscura but that he used it so well as a point of departure for art. Therefore, the study of Vermeer should not be finished by substantiating the hypothesis. It should direct toward the study on photographic expression as an art form. What can be learned from optical effects and photographic expression in Vermeer's paintings? This problem directly leads to a survey into the origin of photographic eye and expression, which is also another purpose of this study.
  • 4-チアゾリジノン-1, 1-ジオキシド
    金子 豊, 中村 岳司, 朝武 敦, 北 弘志
    1992 年 55 巻 6 号 p. 436-439
    発行日: 1992/12/28
    公開日: 2011/08/11
    ジャーナル フリー
    4-Thiazolodinone-1, 1-dioxide (TZ) consisting of 5-membered heterocyclic ring system is very interesting skeleton from the viewpoint of dye formation, because it possesses an active methylene at 5-position in its ring system. Eight kinds of TZ derivatives were synthesized and their coupling reactivity with quinonediimine (QDI) was investigated. Investigation of these TZ derivatives revealed that, (i) TZ derivatives could be coupled with QDI resulting in azomethine magenta dyes, (ii) these dyes are hypsochromically shifted in hue, compared with dyes obtained from conventional pyrazolone (PR) magenta couplers, (iii) they also have undesirable secondary spectral absorption peaks as well as the dyes obtained from PR couplers.
    Here in, we report on the relationship between the electronic effect of the substituents and λmax of dyes formed from TZ derivatives. In addition, the absorption spectra of TZ derivatives in azomethine dyes are compared with those of PR couplers.
  • 広島 義光
    1992 年 55 巻 6 号 p. 440-445
    発行日: 1992/12/28
    公開日: 2011/08/11
    ジャーナル フリー
    More than 20 years have passed since CCD was invented. Development of CCD image sensor started in the wake of the invention of CCD. Great progress has been made in fabricating larger pixel number, smaller, more sensitive and higher quality CCD image sensor. As a result CCD image sensor has established a position as a key device for video careras of various application.
    Perfomance of CO has been constantly developed conquering the technical difficulty of attainning contradicting characteristics of high resolution and high sensitivity. The amount of annual production of CCD has reached ten million, supported by vigorous demand for camcorders.
    Recent advances in CCD image sensors especially for personal camcorders are reviewed and view for the future is also discussed.
  • 最近の話題
    三宅 洋一
    1992 年 55 巻 6 号 p. 446-455
    発行日: 1992/12/28
    公開日: 2011/08/11
    ジャーナル フリー
    Image processing technology has been widely studyed and applied in the various kinds of science and engineering.
    This paper introduces current topics of image processing technology researches which has been done in our laboratories. First, the improvement of color reproduction in hardocopy is described, and secondly, applications of neural network to character recognition and automatic solder-joint inspection are introduced. Finally, analysis of gastric mucosa images by electric endoscope and its applications to diagnosis are described.
  • 大野 信
    1992 年 55 巻 6 号 p. 456-464
    発行日: 1992/12/28
    公開日: 2011/08/11
    ジャーナル フリー
    The thermal dye transfer printing has been developed as the only method to produce photograph-like small size high definition color hardcopies.
    It was invented by Sony Corp. in the beginning of the 1980s. Since it has been called the sublimation dye transfer printing method. However reently the dye transfer mechanism is mainly due to the simple thermal diffusion process. Thus the adequate name of this printing should be changed to the thermal dye transfer printing.
    This paper deals with the technical trends of the thermal dye transfer color hardcopy printing to comparison with the various dye trasfer methods.
  • Alan CALMES, 岩野 治彦
    1992 年 55 巻 6 号 p. 465-469
    発行日: 1992/12/28
    公開日: 2011/08/11
    ジャーナル フリー
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