A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Feature identification from vectorized mechanical drawings
Algorithms to identify 2D geometric features from the vectorized form of a scanned engineering drawing have been developed. These are based on a pattern matching process where the entities present in the vectorized drawing are checked for specific pattern primitives. The pattern primitives present in an entity are compared with the overall direction of the entity to arrive at the 2D features that are present. A library of 2D geometric features has been developed for comparative purposes. For 3D reconstruction and feature recognition a separation reference point is first found in order to group the entities into their respective views, i.e., top, front, and right side view. This separation reference point is then used to transfer the points belonging to the three orthographic views, expressed in the 2D coordinate system, to a 3D coordinate system. The 2D feature recognition algorithm is applied to each of the three views and the 2D features recognized in each view are combined using a set of matching primitives and matching rules to arrive at the 3D features present in the component. 3D features with linear sweep or rotational sweep and uniform thickness can be recognized.
Feature identification from vectorized mechanical drawings
Algorithms to identify 2D geometric features from the vectorized form of a scanned engineering drawing have been developed. These are based on a pattern matching process where the entities present in the vectorized drawing are checked for specific pattern primitives. The pattern primitives present in an entity are compared with the overall direction of the entity to arrive at the 2D features that are present. A library of 2D geometric features has been developed for comparative purposes. For 3D reconstruction and feature recognition a separation reference point is first found in order to group the entities into their respective views, i.e., top, front, and right side view. This separation reference point is then used to transfer the points belonging to the three orthographic views, expressed in the 2D coordinate system, to a 3D coordinate system. The 2D feature recognition algorithm is applied to each of the three views and the 2D features recognized in each view are combined using a set of matching primitives and matching rules to arrive at the 3D features present in the component. 3D features with linear sweep or rotational sweep and uniform thickness can be recognized.
Feature identification from vectorized mechanical drawings
Langrana, N.A. (author) / Yuan, Chen (author) / Das, A.K. (author)
Computer Vision Image Understanding ; 68 ; 127-145
1997
19 Seiten, 25 Quellen
Article (Journal)
English
Finite element groundwater models - a vectorized approach
| Tema Archive | 1986
| Bentham Science Publishers | 2012