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FEATURE ENCODING MODELS FOR GEOGRAPHIC IMAGE RETRIEVAL AND CATEGORIZATION

Ozkan, Savas; Ates, Tayfun; Tola, Engin; Soysal, Medeni; Esen, Ersin


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        "name": "Ozkan, Savas"
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      {
        "affiliation": "Orta Dogu Tekn Univ, Bilgisayar Muhendisligi, Ankara, Turkey", 
        "name": "Ates, Tayfun"
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      {
        "affiliation": "Aurvis R&D, Ankara, Turkey", 
        "name": "Tola, Engin"
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      {
        "affiliation": "TUBITAK UZAY, Goruntu Isleme Grubu, Cankaya, Turkey", 
        "name": "Soysal, Medeni"
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      {
        "affiliation": "TUBITAK UZAY, Goruntu Isleme Grubu, Cankaya, Turkey", 
        "name": "Esen, Ersin"
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    "description": "In this work, we survey the perormance of various feature encoding models for geographic image retrieval task Recently introduced Vector-of-Locally-Aggregated Descriptors (VLAD) and its Product Quantization encoded binary version VLAD-PQ are compared with the widely used Bag-of-Word (BoW) model. Evaluation results are shown on a publicly available 21-class LULC dataset. With experiments, it is shown that VLAD outperforms classical BoW representation albeit with some increases in the computation time. Additionally, VLAD-PQ results in similar retrieval performance with VLAD but requiring no more computational or memory resources are observed", 
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