Now showing items 1-13 of 13

    • Automatic image captioning 

      Pan J.-Y.; Yang H.-J.; Duygulu, Pınar; Faloutsos, C. (2004)
      In this paper, we examine the problem of automatic image captioning. Given a training set of captioned images, we want to discover correlations between image features and keywords, so that we can automatically find good ...
    • Automatic performance evaluation of Web search engines 

      Can, F.; Nuray, R.; Sevdik, A. B. (Elsevier, 2004)
      Measuring the information retrieval effectiveness of World Wide Web search engines is costly because of human relevance judgments involved. However, both for business enterprises and people it is important to know the most ...
    • Effect of inverted index partitioning schemes on performance of query processing in parallel text retrieval systems 

      Cambazoğlu, B. Barla; Çatal, A.; Aykanat, Cevdet (Springer, 2006-11)
      Shared-nothing, parallel text retrieval systems require an inverted index, representing a document collection, to be partitioned among a number of processors. In general, the index can be partitioned based on either the ...
    • Effective use of space for pivot-based metric indexing structures 

      Çelik, Cengiz (IEEE, 2008-04)
      Among the metric space indexing methods, AESA is known to produce the lowest query costs in terms of the number of distance computations. However, its quadratic construction cost and space consumption makes it infeasiblefor ...
    • Efficiency and effectiveness of query processing in cluster-based retrieval 

      Can, F.; Altingövde I.S.; Demir, E. (Elsevier, 2004)
      Our research shows that for large databases, without considerable additional storage overhead, cluster-based retrieval (CBR) can compete with the time efficiency and effectiveness of the inverted index-based full search ...
    • Exploiting interclass rules for focused crawling 

      Altingövde, I. S.; Ulusoy, Ö. (IEEE, 2004)
      A baseline crawler was developed at the Bilkent University based on a focused-crawling approach. The focused crawler is an agent that targets a particular topic and visits and gathers only a relevant, narrow Web segment ...
    • Integration of structural and semantic models for multimedia metadata management 

      Little, S.; Martinelli, M.; Salvetti, O.; Güdükbay, Uğur; Ulusoy, Özgür; De Chalendar, G.; Grefenstette, G. (IEEE, 2007-06)
      The management and exchange of multimedia data is challenging due to the variety of formats, standards and intended applications. In addition, production of multimedia data is rapidly increasing due to the availability of ...
    • İçerik tabanlı görüntü erişimi için sahne sınıflandırması 

      Çavuş, Özge; Aksoy, Selim (IEEE, 2008-04)
      Son yıllarda çok geniş veri tabanlarının kullanımıyla birlikte içerik tabanlı görüntü indekslemesi ve erişimi önemli bir araştırma konusu halini almıştır. Bu çalışmada, görüntü indekslemesi için sahne sınıflandırmasını baz ...
    • Key frame selection from MPEG video data 

      Gerek O.N.; Altunbasak, Y. (1997)
      This paper describes a method for selecting key frames by using a number of parameters extracted from the MPEG video stream. The parameters are directly extracted from the compressed video stream without decompression. A ...
    • Matching ottoman words: an image retrieval approach to historical document indexing 

      Ataer, Esra; Duygulu, Pınar (ACM, 2007-07)
      Large archives of Ottoman documents are challenging to many historians all over the world. However, these archives remain inaccessible since manual transcription of such a huge volume is difficult. Automatic transcription ...
    • MPEG-7 uyumlu video veri tabanlari için önemli nesnelerin otomatik olarak bulunmasi 

      Baştan, Muhammed; Güdükbay, Uğur; Ulusoy, Özgür (IEEE, 2008-04)
      Bu çalışma, genel olarak nesneye dayalı endekslemeyi destekleyen, özel olarak MPEG-7 uyumlu veritabanları için, videolardan önemli nesnelerin otomatik olarak çıkarılmasını saglayabilecek bir yöntem sunmaktadır. Şimdiye ...
    • Retrieval of Ottoman documents 

      Ataer, Esra; Duygulu, Pınar (ACM, 2006-10)
      There is a growing need to access historical Ottoman documents stored in large archives and therefore managing tools for automatic searching, indexing and transcription of these documents is required. In this paper, we ...
    • Segmentation-based extraction of important objects from video for object-based indexing 

      Baştan, Muhammet; Güdükbay, Uğur; Ulusoy, Özgür (IEEE, 2008-06)
      We describe a method to automatically extract important video objects for object-based indexing. Most of the existing salient object detection approaches detect visually conspicuous structures in images, while our method ...