Shape Description and Matching Using Integral Invariants on Eccentricity Transformed Images

Janan, Faraz; Brady, Michael

doi:10.1007/s11263-014-0773-x

Cited by 16 publications

(5 citation statements)

References 102 publications

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“…There are many effective objective methods that have been proposed for shape description in the field of pattern recognition and computer vision (Latecki & Lakämper, 1999; Direkolu & Nixon, 2011). Current methods for shape description can be classified into two categories: contour based and region based (Janan & Brady, 2015). These methods may provide many objective measures for design research.…”

Section: Methodsmentioning

confidence: 99%

Elliptic Fourier analysis and perceptual matching for the evaluation of bioinspired sketching in conceptual design

Yang

Chen

Liu

2017

AIEDAM

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Biologically inspired design can be used to aid in conceptual design. Sketching is an important ideation process in conceptual design for recording and evaluating flashing moments of inspiration. The present study aims to provide a framework for exploring the effects of biological examples on the sketching contours of products, as well as the perceptual matching degree between design ideas generated via sketching and the desired functions. Elliptic Fourier descriptors with principal component analysis and perceptual matching were used to evaluate and compare the effects of biological examples, no examples, and human-engineered examples from different product categories and within one product category on the sketches in an experiment that involved 28 participants. The application of elliptic Fourier descriptors with principal component analysis shows that there are significant differences in the third and seventh principal components. It is also found that exposure to biological examples can produce more sketches with high perceptual matching degree than the other three conditions, but there are no significant effects of the example exposure on the Pearson correlation coefficients of semantic differential evaluation value vectors between design problems and sketches. These results demonstrate that exposure to biological examples will correlate with Elliptic Fourier descriptors of sketches and will not significantly increase the perceptual matching degree between sketches and the desired function.

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Section: Methodsmentioning

confidence: 99%

Elliptic Fourier analysis and perceptual matching for the evaluation of bioinspired sketching in conceptual design

Yang

Chen

Liu

2017

AIEDAM

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“…Above all, the DFCC sequence is treated as a positive integer with n digits. The sequence is then searched corresponding to the minimum positive integer [25].…”

Section: ) Difference Freeman Chain Code (Dfcc) For the Contour Reprmentioning

confidence: 99%

Efficient Free-Form Contour Packing Based on Code Matching Strategy

Guo

et al. 2019

IEEE Access

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Freeform surfaces exist widely in the stock cutting process of clinical prosthesis preparation, aviation, ship, and other manufacturing industries. The free-form contours of surfaces need to be packed before they are machined from raw materials. The existing methods search a contour position by rotating the contour and translating it to connect other contours for packing. The relative position between two contours will be changed after the rotation as the contour description is lack of geometric invariance. These methods easily miss the best layout position resulting in interspaces in the raw material. Moreover, this result seriously reduces the performance and efficiency of an automatic packing system. Therefore, a new packing algorithm is proposed in this paper by combining the geometric invariant description and coding matching for contours to solve the contour rotating and position connecting problems. The optimal position of a contour can be found directly and then connected by the extracted similar complement features of the contour. The experimental results show that the proposed method can greatly improve quality and efficiency of the layout, especially in the material utilization. INDEX TERMS Computer graphics, code matching, shape, free-form contour packing, freeman chain code, geometric invariant description, layout.

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“…These region-based approaches are computationally intense and most of them need to normalize the image to achieve common geometrical invariance. The representative approaches in the literature for contour based include Contour Flexibility [10], Curvature Scale Space [11], Fourier Descriptors [12], Shape Contexts (SC) [13], Inner-Distance Shape Contexts [14], Distance Sets [15], Aligning Curves [16], Height Functions [17], Shape Signature [18] and integral invariants [19]. These contour descriptors are based on the boundary of a shape; they do not capture the internal structure of the shape, and so they are unsuitable for disjoint shapes or shapes with holes because internal boundary and topological information is used by these descriptors.…”

Section: Introductionmentioning

confidence: 99%

Shape Retrieval Using ECPDH with Dynamic Programming

Shu¹,

Pan²,

Qi³

2016

JCC

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The matching and retrieval of the 2D shapes are challenging issues in object recognition and computer vision. In this paper, we propose a new object contour descriptor termed ECPDH (Elliptic Contour Points Distribution Histogram), which is based on the distribution of the points on an object contour under the polar coordinates. ECPDH has the essential merits of invariance to scale and translation. Dynamic Programming (DP) algorithm is used to measure the distance between the ECPDHs. The effectiveness of the proposed method is demonstrated using some standard tests on MPEG-7 shape database. The results show the precision and recall of our method over other recent methods in the literature.

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Shape Description and Matching Using Integral Invariants on Eccentricity Transformed Images

Abstract: Matching occluded and noisy shapes is a prob- inside the shape; but they ignore the boundary information. 15We describe a method that combines the boundary signature 16 of a shape obtained from II and structural information from 17 the Ecc to yield results that improve on them separately.

Cited by 16 publications

References 102 publications

Elliptic Fourier analysis and perceptual matching for the evaluation of bioinspired sketching in conceptual design

Elliptic Fourier analysis and perceptual matching for the evaluation of bioinspired sketching in conceptual design

Efficient Free-Form Contour Packing Based on Code Matching Strategy

Shape Retrieval Using ECPDH with Dynamic Programming

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