论文标题
图像纹理分类的模态特征
Modal features for image texture classification
论文作者
论文摘要
特征提取是图像处理的关键步骤,用于模式识别和机器学习过程。它的目的在于通过计算精确描述原始信息的功能来降低输入数据的维度。在本文中,引入了基于离散模态分解(DMD)的新功能提取方法,以扩展基于空间和频率的特征组。这些新功能称为模态功能。最初,旨在将信号分解为通过振动力学问题构建的模态,将DMD投影应用于图像,以便使用两种方法提取模态特征。第一个称为全尺度DMD,是直接利用分解为特征的分解。第二个称为滤波DMD的一个是使用DMD模式作为过滤器,以通过局部转换过程获得功能。与几种经典特征提取方法相比,对图像纹理分类任务进行了实验。我们表明,DMD方法的分类性能与最先进的技术相当,并且提取时间较低。
Feature extraction is a key step in image processing for pattern recognition and machine learning processes. Its purpose lies in reducing the dimensionality of the input data through the computing of features which accurately describe the original information. In this article, a new feature extraction method based on Discrete Modal Decomposition (DMD) is introduced, to extend the group of space and frequency based features. These new features are called modal features. Initially aiming to decompose a signal into a modal basis built from a vibration mechanics problem, the DMD projection is applied to images in order to extract modal features with two approaches. The first one, called full scale DMD, consists in exploiting directly the decomposition resulting coordinates as features. The second one, called filtering DMD, consists in using the DMD modes as filters to obtain features through a local transformation process. Experiments are performed on image texture classification tasks including several widely used data bases, compared to several classic feature extraction methods. We show that the DMD approach achieves good classification performances, comparable to the state of the art techniques, with a lower extraction time.