<p>Local Binary Patterns (LBPs), while foundational in image processing, face limitations including generalization issues and restricted neighborhood sampling. To address these, we introduce three novel feature extraction techniques: Horizontal Orthogonal Information Fused LBP (HOI-LBP), Vertical Orthogonal Information Fused LBP (VOI-LBP), and Multiplied Orthogonal Information Fused LBP (MOI-LBP). Our methods integrate orthogonal pixel information from the outer 5<InlineEquation ID="IEq1"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="41870_2025_2747_Article_IEq1.gif" Format="GIF" Height="13" Rendition="HTML" Resolution="72" Type="Linedraw" Width="19" /> </InlineMediaObject> <EquationSource Format="TEX">\(\times \)</EquationSource> </InlineEquation>5 neighborhood with the traditional 3<InlineEquation ID="IEq2"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="41870_2025_2747_Article_IEq1.gif" Format="GIF" Height="13" Rendition="HTML" Resolution="72" Type="Linedraw" Width="19" /> </InlineMediaObject> <EquationSource Format="TEX">\(\times \)</EquationSource> </InlineEquation>3 LBP operator through logical bitwise fusion. This approach leverages AND and OR operations on cyclic 8-bit pairs of corner, horizontal, and vertical pixels surrounding the central pixel, significantly enhancing feature richness and noise robustness. Experimental evaluations on benchmark datasets using deep learning (DL) models (VGG-16, MobileNet, EfficientNetB0) demonstrate the efficacy of our techniques. The proposed HOI-LBP, VOI-LBP, and MOI-LBP consistently outperform regular LBP, showing an average increase of 6.63% in training accuracy and 4.7% in validation accuracy. Furthermore, notable reductions in training and validation losses signify improved convergence and generalization capabilities. These results confirm that our fused features provide a more comprehensive representation of image content by capturing subtle variations in texture, gradient energies and structural patterns. Thus, marking a significant advancement in image processing and machine learning (ML) applications.</p>

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Ortho-LBP: novel features for enhanced pattern recognition through bitwise logical fusion of bi-directional orthogonal information with LBP

  • K. Nithish Kumar,
  • G. Nirmal,
  • Maitreya Vaghulade,
  • Smital Anandrao Patil,
  • Aryan Verma

摘要

Local Binary Patterns (LBPs), while foundational in image processing, face limitations including generalization issues and restricted neighborhood sampling. To address these, we introduce three novel feature extraction techniques: Horizontal Orthogonal Information Fused LBP (HOI-LBP), Vertical Orthogonal Information Fused LBP (VOI-LBP), and Multiplied Orthogonal Information Fused LBP (MOI-LBP). Our methods integrate orthogonal pixel information from the outer 5 \(\times \) 5 neighborhood with the traditional 3 \(\times \) 3 LBP operator through logical bitwise fusion. This approach leverages AND and OR operations on cyclic 8-bit pairs of corner, horizontal, and vertical pixels surrounding the central pixel, significantly enhancing feature richness and noise robustness. Experimental evaluations on benchmark datasets using deep learning (DL) models (VGG-16, MobileNet, EfficientNetB0) demonstrate the efficacy of our techniques. The proposed HOI-LBP, VOI-LBP, and MOI-LBP consistently outperform regular LBP, showing an average increase of 6.63% in training accuracy and 4.7% in validation accuracy. Furthermore, notable reductions in training and validation losses signify improved convergence and generalization capabilities. These results confirm that our fused features provide a more comprehensive representation of image content by capturing subtle variations in texture, gradient energies and structural patterns. Thus, marking a significant advancement in image processing and machine learning (ML) applications.