Radial centroid curve for affine invariant features extraction

作者：Yang Jianwei^*; Lan Rushi; Tang Yuan Yan; Chen Yunjie

来源：International Journal of Wavelets, Multiresolution and Information Processing, 2012, 10(4).

DOI：10.1142/S021969131250035X

• Affine invariant
• Affine invariant feature
• Closed curve
• Radial centroid curve
• Radial line
• Stationary wavelet transforms
• Wavelet methods

The extraction of affine invariant features plays an important role in many fields of computer vision. Contour-based wavelet methods are unapplicable to objects with several separable components. In this paper, a method is proposed by converting the object into a closed curve, which is called radial centroid curve (RCC). Point on this curve is the centroid of radial line segment from centroid of the object. It is shown that the RCC derived from the affine transformed object is the same affine transformed version as that of the original object. An affine invariant AIF) is constructed by applying stationary wavelet transform (SWT) to the derived RCC. This scheme is applicable to objects with several separable components. Several experiments have been conducted to evaluate the performance of the proposed method.

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