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Color texture characterization based on the extended relative phase in the complex wavelets domain

机译:基于复小波域中扩展相对相位的颜色纹理表征

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In this paper, we present a color texture characterization by studying novel information of complex wavelet coefficients which we call extended relative phase (ERP) information. By definition, this latter permits to consider relation between color subbands by using straightforward univariate models, and thus avoiding cumbersomeness of multivariate fitting. The ERP information is modeled by three well known circular distributions namely, VonMises (VM), Wrapped Cauchy (WC) and Vonn. All the three models present, advantages of simple feature extraction (using maximum likelihood estimation) and similarity measurement (known forms of Kullback-leibler divergence) steps, which extremely helps for the runtime issue. Experimental results on the Vistex database show that considering ERP inter color subbands improves retrieval performances over the use of conventional relative phase intra grayscale subbands.
机译:在本文中,我们通过研究复杂小波系数的新信息(称为扩展相对相位(ERP)信息)来呈现颜色纹理特征。根据定义,后者允许使用简单的单变量模型来考虑颜色子带之间的关系,从而避免了多元拟合的麻烦。 ERP信息由三个著名的圆形分布建模,即VonMises(VM),Wrapped Cauchy(WC)和Vonn。所有这三个模型都具有简单特征提取(使用最大似然估计)和相似性度量(已知形式的Kullback-leibler散度)步骤的优点,这对于运行时问题非常有帮助。在Vistex数据库上的实验结果表明,与使用传统的相对相位帧内灰度子带相比,考虑使用ERP互色子带可以提高检索性能。

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