Recognition of design symbols from midship drawings |
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| Authors: | Ho-Jin Hwang Soonhung Han Yong-Dae Kim |
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| Institution: | aMaritime Safety and Pollution Control Division, Korea Research Institute of Ships & Ocean Engineering/KORDI, 171 Jang-dong, Yusong-gu, Daejeon 305-343, South Korea;bDepartment of Mechanical Engineering, Korea Advanced Institute of Science and Technology, ME3080, 373-1, Gusong-dong, Yusong-gu, Daejeon 305-701, South Korea |
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| Abstract: | Despite the availability of 3D CAD systems, the designers in shipyards still use 2D CAD systems because of the need to produce drawings rapidly and a shortage of labor. The shipyard spends much time and labor analyzing the design information contained in 2D drawings and creating 3D model for the downstream processes. The design information is represented by symbols that are well known among designers in shipyard. Symbols are expressed by meaningless geometric shapes. These shapes are recognized to have meanings by analysis of experienced and knowledgeable designers.We propose a method for automatic recognition of 2D symbols and the extraction of design information from the midship drawings. The shape and rationale of 2D symbols used in ship design have been analyzed, and symbols have been classified according to the analysis. Based on the classified symbols, the developed system recognizes the symbols expressed in 2D drawings. The extracted design information is assorted by design rationales. The meaningless geometric shape is translated into the design information including designer's intents. The extracted design data can be applied to the design process in shipyards, and the 3D ship model can be automatically created. |
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| Keywords: | Design information extraction Design symbol Information model Midship drawings Symbol recognition |
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