Timezone: »

 
Spotlight
Unsupervised Learning of Visual Sense Models for Polysemous Words
Kate Saenko · Trevor Darrell

Mon Dec 08 08:37 PM -- 08:38 PM (PST) @ None

Polysemy is a problem for methods that exploit image search engines to build object category models. Existing unsupervised approaches do not take word sense into consideration. We propose a new method that uses a dictionary to learn models of visual word sense from a large collection of unlabeled web data. The use of LDA to discover a latent sense space makes the model robust despite the very limited nature of dictionary definitions. The definitions are used to learn a distribution in the latent space that best represents a sense. The algorithm then uses the text surrounding image links to retrieve images with high probability of a particular dictionary sense. An object classifier is trained on the resulting sense-specific images. We evaluate our method on a dataset obtained by searching the web for polysemous words. Category classification experiments show that our dictionary-based approach outperforms baseline methods.

Author Information

Kate Saenko (UMass Lowell)
Trevor Darrell (UC Berkeley)

Related Events (a corresponding poster, oral, or spotlight)

More from the Same Authors