2B GÖRÜNÜSLERDEN OTOMATİK KATI MODELLER OLUSTURMADA UZMAN BİR YAKLASIM

Bu makale, iki ve üç görünüsle ifade edilen prizmatik parçaların otomatik üç boyut (3B) modellerini olusturma konusunu incelemekte ve bu amaçla gelistirilen bilgisayar temelli bir yaklasımı tanıtmaktadır. Bu yaklasım; 2B görünüslere ait verilerin yorumlanması ile üç boyut (3B) unsurların belirlenmesi ve bunların hacimsel kesistirilmeleri ile üç boyut (3B) modellerinin olusturulması esasına dayanmaktadır. Bu amaçla bir dizi kural tanımlanmıs ve uzman sistem kullanılarak bir bilgisayar programı gelistirilmistir. Gelistirilen bu program ile, köse cep ve kapalı kanal gibi unsurların olusturulması etkin olarak yapılabilmektedir. Çalısmadaki diger bir yenilik ise, tam ve yarım kesit görünüslerden de otomatik katı modeller elde edilmesidir.

Anahtar Kelimeler:

Yeniden yapılandırma, Kesit görünüsler, Uzman sistem.

AN EXPERT APPROACH ON AUTOMATIC SOLID MODEL RECONSTRUCTION FROM 2D PROJECTIONS

This paper examines how to automatically reconstruct three dimentions (3D) models from their orthographic two and three views and explains a new approach developed for that purpose. The approach is based on the identification of geometric features with the interpretation of 2B views, their volumetric intersections and reconstruction of solid models. A number of rules have been defined for this goal and they implemented on a prototype software with the approach of expert systems. The developed software allows determination of some features efficiently such as slot, holes, blind holes, closed prismatic holes, etc. Another contrubition of this research is to reconstruct solid models from their full section and half section views that is almost noneexistend in the releated literature.

Keywords:

Reconstruction, Sectional views, Expert system.,

PDF

___

Aldefeld, B. 1983. On Automatic recognition of 3D structures from 2D representation, CAD 15 (2), 59-64.
Allahverdi, N. 2002. Uzman Sistemler Bir Yapay Zeka Uygulaması, Atlas, İstanbul.
Benko, P., Martin, R. R. ve Varady, T. 2001. Algorithms for reverse engineering boundary representation models, Computer Aided Design 33, 839-851.
Çiçek, A, ve Gülesin M. 2005. 2 boyutlu çizimlerden 3 boyutlu katı modellerin otomatik elde edilmesi, Gazi Üniv. Müh.-Mim. Fak. Der., 20, 387-394.
Dimri, J. and Gurumoorthy, B. 2005. Handling sectional views in Volume - Based approach to automatically construct 3D solid from 2D views, Computer Aided Design 37, 485-495.
Geng, W., Wang, J. and Yiang, Z. 2002. Embedding visual cognition in 3D reconstruction from multiview engineering drawings, CAD, 34, 321-336.
Gong, J.H., Zhang, G.F., Zhang, H. and Sun, J.G. 2006. Reconstruction of 3D curvilinear wire-frame from three orthographic views, Computers & Graphics 30, 213-224.
Hubbard, C. and Kim, Y. S. 2001. Geometric Assistance for visual reasoning and construction of solids with curwed surfaces from 2D orthographic views, Advanced in Engineering Software 32, 21-35.
Kuo, M. H. 1998. Reconstruction of quadric surface solids from three-view engineering drawings, Computer Aided Design 30 , 517-527.
Lee, H. and Han, S. 2005. Recostruction of 3D interacting solids of revolotion from 2D orthographic views, Computer Aided Design 37, 1388-1398.
Liu, S., Hu, S., Wang, G. and Sun, J. 2000. Reconstructing of 3D object from orthographic views, Chinese Journal of Computers 23, 141-146.
Liu, S.X, Hu, S.M, Chen, Y.J. and Sun, J.G. 2001a. Reconstruction of curved solids from engineering drawings, Computer Aided Design 33, 1059-1072.
Liu, S. X, Hu, S.M., Chen, Y.J. and Sun, J.G. 2001b. Reconstruction of curved solids from engineering drawings, Computer Aided Design 33, 1059-1072.
Liu, SX, Hu, S.M. and Sun, J.G. 2002. Two accelerating techniques for 3D reconstruction, Journal of Computer Science and Technology 17, 362-368.
Masuda, H. and Masayuki, N. 1997. A Cell-Based approach for generating solid objects from orthographic projections, Computer Aided Design 29, 177-187.
Medsker, L. and Liebowitz, J. 1994. Design and development of expert systems and neural networks, macmillan, New York.
Shin, B.S. and Shin, Y. G. 1998. Fast 3D solid model reconstruction from orthographic views, Computer Aided Design 30, 63-76.
Shum, S. P. S., Lau, W.S., Yuen, M.M. F. and Yu, K..M. 2002. Cost-Effective solid reconstruction from an x-ray image, Journal of Materials Processing Technology 1, 207216.
Shum, S. S. P., Lau, W. S., Yuen, M.M.F. and Yu, K.M. 2001. Solid reconstruction from orthographic views using 2stage extrusion, Computer Aided Design 33, 91-102.
Shum, S. S. P., Lau, W. S., Yuen, M. M. F. And Yu, K.M.. 1997. Solid reconstruction from orthographic opaque views using incremental extrusion, Computer & Graphics 21, 787-800.
Şahin, İ. ve Börklü, H. R. 2007. Hacimsel kesiştirme yaklaşımı kullanarak silindirik parçaların katı modellerini oluşturma, Politeknik Dergisi 10, 71-77.
Şahin, İ. ve Börklü, H. R. 2003. Üç temel görünüşü verilen nesnelerin AutoCAD ortamında otomatik 3B modellerini oluşturma, Makine Tasarımı ve İmalat Dergisi 5, 9-22.
Şahin, İ. ve Börklü, H.R. 2002. 2B görünüş verilerinden bilgisayar destekli 3B modeller oluşturulması: kaynak araştırması, Mühendis ve Makine 507, 20-31.
Tam, K.S. and Atkinson, J. 2003. An approach for creating solid models from orthogonal views by ıdentification of boolean operations, Journal of Materials Processing Technology 138, 1653-1659.
Tanaka, M., Anthony, L., Kaneeda, T. and Hitooka, J. 2004. A single solution method for converting 2D assembly drawings to 3D part drawing, CAD 36, 723-734.
Wang, W. and Grinstein, G. 1989. A polyhedral object’s CSG-Rep construction from a 2D single drawing, Proc. of 1989 SPIE Intelligent Robots and Computer Vision III: Algorithms and Techniques 1192, 230-238.
Wang, W. D. 1991. Regular curved object’s CSGrep reconstruction from a single 2D line drawing, Proc. of 1991 SPIE Intelligent Robots and Computer Vision x: Neural, Biological and 3D Methods 1608, Boston/USA.
Wang, Z. and Latif, M. 2003. Reconstruction of a 3D solid model from orthographic projections, 75. International Conference on Geometric Modeling and Graphics (GMAG'03).
Wu, M.C. and Lin, M.S. 1996. Automatic construction of CSG solids from a single ısometric drawing, International Journal of Computer Integrated Manufacturing 9, 1.
Zhao, H. and Kim, Y.S. 1999. Geometric operations for visual reasoning of a solid from orthographic projections, Advanced in Engineering Software 30, 445-450.