The Optimal Analysis of Circular Strip for Conservation of the Cultural Properties

문화재(文化財) 보존(保存)을 위한 원형(圓形)strip의 최적해석(最適解析)

For this study, the full-scale model of Chumsungdae was selected as an object, and various photographs were obtained with metric camera for forming circular strips and blocks. The accuracies were analyzed according to the change of object distance and different configuration of control points by bundle adjustment, and the characteristics of results obtained through combined strips were drawn. This thesis suggests optimal analysis technique of cylindrical structures requiring all-side analysis such as cultural properties. As a result, it is possible to use control points positioned on only any one-side for all-side analysis, and control configuration is more important rather than the number of control points for increasing accuracy. In addition, it is desirable to locate control points in X, Y and Z plane uniformly, and it was shown as object distance was shorten and the number of combined strips increases, the accuracy of results was improved considerably.

본 연구는 실제크기의 첨성대 모형을 피사체로 선정하여 측정용 카메라에 의해 원형 strip과 Block을 형성한 후, bundle조성으로 촬영거리와 기준점 배치에 따른 정확도를 다양하게 분석하고 strip조합해석의 특성을 규명하므로써 전면(全面)해석을 요하는 각종 문화재 특히 원통형 구조물에 대한 최적 해석기법을 제시한 것이다. 연구결과 어느 일면에 배치된 기준점 만으로도 전면해석이 가능하며, 기준점수에 비해 그 배치가 정도에 보다 큰 영향을 미침을 알 수 있었다. 또한 구조물의 전면해석시 기준점은 X, Y, Z축 평면상에 고루 배치하는 것이 이상적이며, 근접촬영하여 strip조합수에 증가시킴에 따라 정확도가 현저히 향상되었다.