Increased use of digital imagery has facilitated the opportunity to use features, in addition to points, in photogrammetric applications. Straight lines are often present in object space, and prior research has focused on incorporating straight-line constraints into bundle adjustment for frame imagery. In the research reported in this paper, object-space straight lines are used in a bundle adjustment with self-calibration. The perspective projection of straight lines in the object space produces straight lines in the image space in the absence of distortions. Any deviations from straightness in the image space are attributed to various distortion sources, such as radial and decentric lens distortions. Before incorporating straight lines into a bundle adjustment with self-calibration, the representation and perspective transformation of straight lines between image space and object space should be addressed. In this investigation, images of straight lines are represented as a sequence of points along the image line. Also, two points along the object-space straight line are used to represent that line. The perspective relationship between image-and object-space lines is incorporated in a mathematical constraint. The underlying principle in this constraint is that the vector from the perspective centre to an image point on a straight-line feature lies on the plane defined by the perspective centre and the two object points defining the straight line. This constraint has been embedded in a software application for bundle adjustment with self-calibration that can incorporate point as well as straight-line features. Experiments with simulated and real data have proved the feasibility and the efficiency of the algorithm proposed. K: bundle adjustment, self-calibration, straight lines I M are based on the use of distinct points. These points are often obtained from measurements in an analogue or digital
Our tea culture has been a cultural tradition since the ancient society, which both ritual tea ceremony and life tea ceremony had been prevailed. The tea ceremony was not the only ritual ceremony of a country but also had been loved by ancestors as a routine life ceremony combined with memorial service, Gyubang-darye (Lady s tea ceremony) and Seonbi-darye (Man s tea ceremony).
Many tools are required to enhance the taste and character of tea which is called the Dadogu . Dadogu consists of Da-gi (茶器) and Da-gu(茶具). As a broad meaning, Da-gi means various tools for making tea, however, as a narrow meaning, Da-gi means a pot for carrying tea water or brewing tea. On the other hand, Da-gu means tools for making teas.
Among many different materials which are used for Dadogu - gold, silver, copper, iron, ceramics, and onggi(pottery) - ceramics are the major material that had been used. Ceramics are not the only cheap and popular material, but also has relatively warm feeling which is compatible for Da-gu.
Traditional Onggi had been widely used as a material for Da-gwan (pot for brewing tea), tea cup, tea bowl, Tang-gwan (pot for boiling water), fire pot, Sook-woo (pot for cooling water), Toisoogi (pot for dumping used water), and water jar. Recently, modern Onggi had been looked over again as a material for Da-gu.
This study is to discuss about ancestor s tea culture through understanding characteristics and material of traditional Dadogu. And moreover, hope to create various Onggi Dadogu by applying concepts and identity of traditional Onggi to modern Onggi.
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