Fraunhofer-Institut für Produktionsanlagen und Konstruktionstechnik IPK

Filters

2
2
Reset filters

Settings
Now showing 1 - 2 of 2
No Thumbnail Available
Publication

Automatic recognition of scanned technical drawings

1993 , Krause, F.-L. , Jansen, H. , Luth, N.

The problems of automatic conversion of large-scaled documents (technical drawings or maps) into a CAD-file are represented. Existing systems for automated drawing conversion are well suited for documents of excellent quality. The "bad" documents e.g. old blueprints or very complex drawings can be hardly processed by these systems because of time consuming interactive postprocessing of results data. This paper describes a system which involves developed fast and adaptive image processing tools for processing of "bad" documents scanned with low resolution. The results and experiences on the field of graphic recognition and 2D-interpretation of scanned technical drawings are shortly described. Additionally, the requirements to a future system based on our developed processing tools are represented.

View
No Thumbnail Available
Publication

Neue Methoden der automatischen Zeichnungsinterpretation. Einsatzmöglichkeiten der Grauwertverarbeitung.

1993 , Krause, F.-L. , Jansen, H. , Luth, N.

Methods used so far an automatic registration of large-sized technical documents are based on the binarization of pixel data by means of a fixed or dynamic scanning threshold. However, the quality of the results obtained thereby depends to a considerable degree on the quality of the scanning patterns. Much better results can be obtained by means of processing the grey scale values even with a relatively slight resolution.

View