3 Improved Directional Local Extrema Patterns

DOI: 10.1201/9781003123514-3

3.1 Introduction

In this chapter, improvements made to Directional Local Extrema Patterns [DLEP] are presented. DLEP extract the spatial relationship among the pixels by considering the center pixel as a threshold. An attempt is made in the current work by adding color feature and Gabor feature to DLEP. The proposed methods are tested with Corel-1k database. Experiments showed considerable improved results in evaluation metrics.

3.2 Local Patterns

3.2.1 Local Binary Patterns

Ojala et al. [76] proposed texture modeling scheme, in which the local image texture is described by gray-scale and rotational invariant local binary patterns (LBP) operator over a circular ...

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