Consiglio Nazionale delle Ricerche

Tipo di prodottoContributo in atti di convegno
TitoloQuantifying the specificity of near-duplicate image classification functions
Anno di pubblicazione2016
Autore/iRichard Connor Franco Alberto Cardillo
Affiliazioni autoriUniversity of Strathclyde Istituto di Linguistica Computazionale, CNR
Autori CNR e affiliazioni
  • inglese
AbstractThere are many published methods for detecting similar and near-duplicate images. Here, we consider their use in the context of unsupervised near-duplicate detection, where the task is to find a (relatively small) near-duplicate intersection of two large candidate sets. Such scenarios are of particular importance in forensic near-duplicate detection. The essential properties of a such a function are: performance, sensitivity, and specificity. We show that, as collection sizes increase, then specificity becomes the most important of these, as without very high specificity huge numbers of false positive matches will be identified. This makes even very fast, highly sensitive methods completely useless. Until now, to our knowledge, no attempt has been made to measure the specificity of near-duplicate finders, or even to compare them with each other. Recently, a benchmark set of near-duplicate images has been established which allows such assessment by giving a near-duplicate ground truth over a large general image collection. Using this we establish a methodology for calculating specificity. A number of the most likely candidate functions are compared with each other and accurate measurement of sensitivity vs. specificity are given. We believe these are the first such figures be to calculated for any such function.
Lingua abstractinglese
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Pagine da647
Pagine a654
Pagine totali8
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Verificato da refereeSì: Internazionale
Stato della pubblicazionePublished version
Indicizzazione (in banche dati controllate)-
Parole chiavenear-duplicate image detection
Link (URL, URI)-
Titolo convegno/congresso11th International Conference on Computer Vision Theory and Applications
Luogo convegno/congressoRoma
Data/e convegno/congresso27-29/02/2016
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Strutture CNR
  • ILC — Istituto di linguistica computazionale "Antonio Zampolli"
Moduli CNR
    Progetti Europei-
    • Quantifying the specificity of near-duplicate image classification functions