IEEE Trans Image Process - Geodesic invariant feature: a local descriptor in depth.

Tópicos

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Resumo

Different from the photometric images, depth images resolve the distance ambiguity of the scene, while the properties, such as weak texture, high noise, and low resolution, may limit the representation ability of the well-developed descriptors, which are elaborately designed for the photometric images. In this paper, a novel depth descriptor, geodesic invariant feature (GIF), is presented for representing the parts of the articulate objects in depth images. GIF is a multilevel feature representation framework, which is proposed based on the nature of depth images. Low-level, geodesic gradient is introduced to obtain the invariance to the articulate motion, such as scale and rotation variation. Midlevel, superpixel clustering is applied to reduce depth image redundancy, resulting in faster processing speed and better robustness to noise. High-level, deep network is used to exploit the nonlinearity of the data, which further improves the classification accuracy. The proposed descriptor is capable of encoding the local structures in the depth data effectively and efficiently. Comparisons with the state-of-the-art methods reveal the superiority of the proposed method.

Resumo Limpo

differ photometr imag depth imag resolv distanc ambigu scene properti weak textur high nois low resolut may limit represent abil welldevelop descriptor elabor design photometr imag paper novel depth descriptor geodes invari featur gif present repres part articul object depth imag gif multilevel featur represent framework propos base natur depth imag lowlevel geodes gradient introduc obtain invari articul motion scale rotat variat midlevel superpixel cluster appli reduc depth imag redund result faster process speed better robust nois highlevel deep network use exploit nonlinear data improv classif accuraci propos descriptor capabl encod local structur depth data effect effici comparison stateoftheart method reveal superior propos method

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