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http://bura.brunel.ac.uk/handle/2438/2300
Title: | On-line segmentation of freehand sketches by knowledge-based nonlinear thresholding operations |
Authors: | Qin, SF Wright, DK Jordanov, IN |
Keywords: | Heurestic knowledge;On-line sketches;Curve segmentation and classification;Conceptual design |
Issue Date: | 2001 |
Publisher: | Elsevier |
Citation: | Pattern Recognition 34(10): 1885-1893 |
Abstract: | This paper describes an on-line procedure for segmenting freehand sketches into 2D primitives and smooth curves by knowledge-based nonlinear thresholding operations. Drawing position, direction, speed and acceleration information is used for establishing fuzzy knowledge and inferring user’s intention. The procedure can be divided into three stages: (1) obtaining corner points based on the fuzzy knowledge and adaptive thresholds, which includes detecting “obtuse” and “acute” corner points; (2) finding smooth join points, during which stage we use both curve linearity and curvature; and (3) classifying the sketches into the corresponding curves according to curve linearity and changes of curve convexity. The method is illustrated and tested with a number of sketches. |
URI: | http://bura.brunel.ac.uk/handle/2438/2300 |
ISSN: | 0031-3203 |
Appears in Collections: | Design Publications Brunel Design School Research Papers |
Files in This Item:
File | Description | Size | Format | |
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On-line segmentation of freehand sketches by knowledge-based nonlinear thresholding operations.pdf | 124.54 kB | Adobe PDF | View/Open |
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