A method and system for enhancing shape symmetry
A symmetry and symmetry technology, applied in the field of image processing, can solve problems such as inability to process
Active Publication Date: 2017-06-13
SHENZHEN INST OF ADVANCED TECH CHINESE ACAD OF SCI
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[0007] The technical problem to be solved by the present invention is to provide a method and system for enhancing shape symmetry in view of the defect that the existing technology only has external symmetry and cannot deal with shapes with weak intrinsic symmetry
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[0067] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific implementation manners of the present invention will now be described in detail with reference to the accompanying drawings.
[0068] The premise of the present invention is that a curvilinear skeleton can provide guidance for shape symmetry analysis and symmetrization. Specific reasons include:
[0069] (1) The curved skeleton can abstractly represent the biological shape, so the curved skeleton branches on both sides of the symmetrical curve on any shape are also symmetrical;
[0070] (2) Intrinsic symmetry is often required for shapes that are not perfectly constructed, such as sketches, roughly constructed or captured 3D shapes, and there are often many noise points on the contour, so the symmetry analysis of the contour is not as stable as the high-level semantic structure analysis (such as Curve skeleton, etc.);
[0071] (3) The shape t...
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The invention discloses a method for enhancing shape symmetry, comprising the following steps: inputting an original shape M and a curved skeleton S; establishing a skeleton backbone candidate P i , select an effective skeleton backbone candidate set through a global filter; symmetrize the original shape M based on each skeleton backbone candidate to generate a symmetrized shape set; calculate the symmetrization cost, and output the symmetrization cost according to the original shape M Symmetrized shape M most similar to shape M O and the corresponding optimal skeleton backbone candidate P; correspondingly, the present invention also provides a system for enhancing shape symmetry. Beneficial effects of implementing the present invention: the search space of the skeleton backbone is reduced through the curved skeleton and the skeleton backbone candidates; through the skeleton symmetry and detail symmetry operations, the skeleton backbone can be quickly and effectively screened out, thereby obtaining the required symmetric shapes, and finally symmetrizes shapes with weaker intrinsic symmetries.
Description
technical field [0001] The invention relates to the field of image processing, and more particularly, to a method and system for enhancing shape symmetry. Background technique [0002] Mathematically, the precise definition of symmetry is: for a geometric object M, if there exists a T such that M=T(M), that is, M remains unchanged when T is transformed, then M is self-symmetric. Obviously, the important feature of symmetry is its changeability. According to the measure of invariance, symmetry is divided into two categories: extrinsic symmetry and intrinsic symmetry. Extrinsic symmetry measures distance considering Euclidean distance, while intrinsic symmetry considers geodesic distance. For creatures that can move freely, such as humans and general animals, when they move, the external symmetry is broken, while the intrinsic symmetry remains unchanged. [0003] At present, there are many related works on symmetry detection, especially the research on intrinsic symmetry de...
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IPC IPC(8): G06T5/00
Inventor 郑倩郝竹明黄惠丹尼尔·科恩张皓
Owner SHENZHEN INST OF ADVANCED TECH CHINESE ACAD OF SCI