APPROXIMATING 3D SHAPE THROUGH BEZIER CURVE AND MOMENTS IN DISCRETE COSINE TRANSFORM

作者：Mahmood Muhammad Tariq^*; Khan Asifullah; Choi Tae Sun

来源：International Journal of Innovative Computing Information and Control, 2009, 5(10A): 2947-2957.

• Bezier curve
• DCT
• Focus measure
• Shape from focus

Shape from focus (SFF) is one of the passive optical techniques for 3D shape recovery of an Object from its 2D images. This paper presents a new SFF method based on moments in discrete cosine transform (DCT) domain and Bezier curve. We applied one-dimensional DCT on neighborhood vector comprising pixels from three dimensions. Focus values are computed by taking central moments of AC energy components and an initial depth map is recovered by obtaining the location of the maximum focus values among the sequence. To obtain an accurate 3D shape and to reduce the noise sensitivity of the focus measure, focus values around the peak of the focus curve are interpolated through Bezier curve. The proposed method is tested and results have been compared with existing approaches by using image sequences of synthetic and real objects. The experimental results demonstrate the effectiveness of the proposed scheme.

• 出版日期2009-10