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• W2525226171 abstract "The growing usage of mobile camera phones has led to proliferation of many mobile applications, such as mobile city guide, mobile shopping, personalized mobile service, and personal album management. Mobile visual systems have been developed which analyze images taken by mobile devices to enable these mobile applications. Amongst these applications, there are two important ones: 1) mobile image recognition which provides relevant information for the scene/landmark images, and 2) mobile image annotation that uses camera phones to capture images and annotate them. Mobile image recognition and annotation are closely related, and are based on mobile visual analysis. In order to enhance the performance of mobile visual system, it is natural to incorporate the mobile domain-specific context information to the conventional visual content analysis. The context information in this work includes location and direction information on mobile devices, mobile user interaction, etc. However, context information is underutilized in most of the existing mobile visual systems. Existing mobile visual systems mainly use location information provided by GPS (Global Positioning System) to obtain the candidate images located near the current location of the query image, and then carry out content analysis within the shortlisted candidates to obtain the final recognition/annotation results. This is insufficient since (i) GPS is not that reliable due to its large errors in dense build-up areas, and (ii) other context information such as direction (recorded by digital compass on mobile device) is not utilized to further improve recognition. For mobile image recognition, we proposed several approaches based on content analysis with possible incorporation of context information: 1) A new approach for scene image recognition is proposed by combining generative models and discriminative models. A new image signature is proposed based on Gaussian Mixture Model (GMM), and its soft relevance value is incorporated into training of Fuzzy Support Vector Machine (FSVM). By using the proposed GMM-FSVM approach, the recognition performance is shown to be superior to state-of-the-art Bag-of-Words (BoW) methods. 2) A new landmark image recognition method is proposed that can incorporate saliency information of images to the state-of-the-art Scalable Vocabulary Tree (SVT) approach. Since the saliency information emphasizes the foreground landmark object and ignores the cluttered background, recognition performance of the proposed Saliency-Aware Vocabulary Tree (SAVT) algorithm is improved relative to the baseline SVT approach. 3) We propose a real-valued multi-class adaboost algorithm using exponential loss function (RMAE), which can integrate visual content and two types of mobile context: location and direction. RMAE generates SVTs based on content and context analysis, respectively, and then constructs weak classifiers based on them, followed by the final strong classifier construction based on the weak classifiers which contains both content and context…" @default.
• W2525226171 created "2016-10-07" @default.
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• W2525226171 date "2019-10-03" @default.
• W2525226171 modified "2023-09-22" @default.
• W2525226171 title "Context-aware mobile image recognition and annotation" @default.
• W2525226171 doi "https://doi.org/10.32657/10356/55100" @default.
• W2525226171 hasPublicationYear "2019" @default.
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