Abstract

This study aims at the great limitations caused by the non-ROI (region of interest) information interference in traditional scene classification algorithms, including the changes of multiscale or various visual angles and the high similarity between classes and other factors. An effective indoor scene classification mechanism based on multiple descriptors fusion is proposed, which introduces the depth images to improve descriptor efficiency. The greedy descriptor filter algorithm (GDFA) is proposed to obtain valuable descriptors, and the multiple descriptor combination method is also given to further improve descriptor performance. Performance analysis and simulation results show that multiple descriptors fusion not only can achieve higher classification accuracy than principal components analysis (PCA) in the condition with medium and large size of descriptors but also can improve the classification accuracy than the other existing algorithms effectively.

Highlights

  • With the rapid development of the Internet and the increasing demand for applications based on location awareness, location-based services are getting extensive attention

  • We found before, the classification accuracy of Test 2 is always higher than Test 1, and descriptor level (DL) always outperforms CL

  • The initial descriptor set is formed based on the established spatial pyramid model (SPM)

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Summary

Introduction

With the rapid development of the Internet and the increasing demand for applications based on location awareness, location-based services are getting extensive attention. Most people cannot live without the location service and the navigation system based on GPS Outdoor localization technology has been relatively mature, and many mobile devices refer to outdoor location technology [1, 2, 3, 4]. Due to the particularity of indoor environment, the GPS signal cannot directly meet the requirements of indoor localization service. There are many indoor localization methods [4,5,6], mainly including WiFi, RFID, Bluetooth, Ultrawide band, and so on. The visual indoor localization system [7,8,9] is attracting more and more attentions of the researchers all over the world due to the advantages of low deployment cost, strong autonomy, and high localization accuracy

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