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• W2000892604 abstract "3차원 영상 해석 기법에 의해 구해진 DEM(Digital Elevation Map)을 정량적으로 평가하는 것은 영상 해석 기법의 유효성을 검증하기 위해 매우 중요하다. 본 논문에서는 모의 영상 제작에 의한 3차원 재구성 과정의 새로운 정량적 평가 방법을 제안하였다. 제안된 방법은 미리 확보된 DEM과 정사영상(ortho-image)을 가상의 실제 값(pseudo ground truth)으로 가정한 것에 의한 것이다. 제안된 방법의 과정은 그래픽스에서 사용되는 ray tracing 알고리즘을 구성하여 가상의 실제 값에 적용함으로서 원하는 시점으로부터의 한 쌍의 모의 영상을 제작하는 것으로부터 시작된다. 제작된 모의 영상 쌍으로부터 구해진 DEM을 가상의 실제 값과 비교하면 구해진 DEM의 정량적인 오차 분석이 가능하여, 적용된 3차원 영상 해석 기법의 유효성이 평가될 수 있다. 제안된 평가 방법의 타당성을 검증하기 위해, 정량적 및 정성적인 실험이 수행되었다. 이를 위해 발생되는 모의 영상이 실제 형상을 재현하는 정도를 정량적인 수치로서 구하여 제안된 방법을 타당성을 입증하였다. 또한 정합창의 크기 변화에 따른 DEM의 정확도를 제안된 평가 방법에 의해 실험하였다. 이러한 실험 결과가 예견된 결과와 일치함에 의해 제안된 평가 방법의 타당성을 정성적으로도 명백히 증명하였다. The quantitative evaluation of DEM(Digital Elevation Map) is very important to the assessment of the effectiveness for the applied 3D image analysis technique. This paper presents a new quantitative evaluation method of 3D reconstruction process by using synthetic images. The proposed method is based on the assumption that a preacquired DEM and ortho-image should be the pseudo ground truth. The proposed evaluation process begins by generating a pair of photo-realistic synthetic images of the terrain from any viewpoint in terms of application of the constructed ray tracing algorithm to the pseudo ground truth. By comparing the DEM obtained by a pair of photo-realistic synthetic images with the assumed pseudo ground truth, we can analyze the quantitative error in DEM and evaluate the effectiveness of the applied 3D analysis method. To verify the effectiveness of the proposed evaluation method, we carry out the quantitative and the qualitative experiments. For the quantitative experiment, we prove the accuracy of the photo-realistic synthetic image. Also, the proposed evaluation method is experimented on the 3D reconstruction with regards to the change of the matching window. Based on the fact that the experimental result agrees with the anticipation, we can qualitatively manifest the effectiveness of the proposed evaluation method." @default.
• W2000892604 created "2016-06-24" @default.
• W2000892604 creator A5033805053 @default.
• W2000892604 date "2013-03-30" @default.
• W2000892604 modified "2023-10-16" @default.
• W2000892604 title "Quantitative Assessment of 3D Reconstruction Procedure Using Stereo Matching" @default.
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• W2000892604 doi "https://doi.org/10.7471/ikeee.2013.17.1.001" @default.
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