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With the introduction of many image compression standards, the social images are stored and transmitted in compressed formats such as JPEG. For large-scale image database, tag ranking must fully decompress the compressed data to predict tag relevance based on visual content. In order to improve the accuracy of tag ranking and further reduce the ranking time, social images tag ranking based on visual...
Bag-of-words (BoW) model has been widely used in pornographic images recognition and filtering. Most of existing methods create BoW from images with a scale-invariant feature transform (SIFT) descriptor in the pixel domain. These methods require extra processing time to decompress images in compressed formats. In addition, the SIFT descriptor only views local feature points in centers of some regions...
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