Image Annotation
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Automatic image annotation (also known as automatic image tagging or linguistic indexing) is the process by which a computer system automatically assigns metadata in the form of captioning or Index term|keywords to a digital image. This application of computer vision techniques is used in image retrieval systems to organize and locate images of interest from a database.This method can be regarded as a type of multiclass classification|multi-class image Statistical classification|classification with a very large number of classes - as large as the vocabulary size. Typically, image analysis in the form of extracted feature vectors and the training annotation words are used by machine learning techniques to attempt to automatically apply annotations to new images. The first methods learned the correlations between image features and training annotations, then techniques were developed using machine translation to try to translate the textual vocabulary with the 'visual vocabulary', or...
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