Lu, Feng; Yang, Zhaoxia; Guan, Lutai Gradient computation of a noisy digital image by B-spline fitting. (Chinese. English summary) Zbl 1024.94503 Acta Sci. Nat. Univ. Sunyatseni 41, No. 2, 1-3 (2002). MSC: 94A08 65D07 68U10 PDF BibTeX XML Cite \textit{F. Lu} et al., Acta Sci. Nat. Univ. Sunyatseni 41, No. 2, 1--3 (2002; Zbl 1024.94503)
Guan, Lütai; Lu, Feng; Yang, Zhaoxia Surface/surface intersection using projection. (Chinese. English summary) Zbl 0966.68210 Acta Sci. Nat. Univ. Sunyatseni 39, No. 6, 1-5 (2000). MSC: 68U05 PDF BibTeX XML Cite \textit{L. Guan} et al., Acta Sci. Nat. Univ. Sunyatseni 39, No. 6, 1--5 (2000; Zbl 0966.68210)