Method and system for optimizing accuracy-specificity trade-offs in large scale visual recognition
First Claim
Patent Images
1. A method for classifying images, comprising:
- receiving an input image to classify using a computer system;
scoring a likelihood of each individual node in a plurality of nodes of a classifier using a computer system, where the classifier includes a semantic hierarchy in which the plurality of nodes correspond to a hierarchy of named entities and a set of individual object classifiers to classify a likelihood that the input image contains a named entity in one of a plurality of leaf nodes from the plurality of nodes, where the plurality of leaf nodes correspond to a set of mutually exclusive named entities in the hierarchy of named entities;
selecting an individual node from the plurality of nodes most descriptive of the image using a computer system, where the individual node is determined by;
iteratively estimating a reward weight within the classifier that achieves a predetermined accuracy, where the accuracy of the classifier is determined by classifying a validation data set using the estimated reward weight;
determining reward weighted likelihoods using the estimated reward weight that achieves the predetermined accuracy; and
selecting as the individual node most descriptive of the image the individual node within the plurality of nodes in the semantic hierarchy that has the highest reward weighted likelihood;
classifying the input image as a named entity corresponding to the individual node most descriptive of the image using a computer system; and
returning the named entity as a classification of the input image using a computer system.
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Abstract
As visual recognition scales up to ever larger numbers of categories, maintaining high accuracy is increasingly difficult. Embodiment of the present invention include methods for optimizing accuracy-specificity trade-offs in large scale recognition where object categories form a semantic hierarchy consisting of many levels of abstraction.
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Citations
4 Claims
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1. A method for classifying images, comprising:
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receiving an input image to classify using a computer system; scoring a likelihood of each individual node in a plurality of nodes of a classifier using a computer system, where the classifier includes a semantic hierarchy in which the plurality of nodes correspond to a hierarchy of named entities and a set of individual object classifiers to classify a likelihood that the input image contains a named entity in one of a plurality of leaf nodes from the plurality of nodes, where the plurality of leaf nodes correspond to a set of mutually exclusive named entities in the hierarchy of named entities; selecting an individual node from the plurality of nodes most descriptive of the image using a computer system, where the individual node is determined by; iteratively estimating a reward weight within the classifier that achieves a predetermined accuracy, where the accuracy of the classifier is determined by classifying a validation data set using the estimated reward weight; determining reward weighted likelihoods using the estimated reward weight that achieves the predetermined accuracy; and selecting as the individual node most descriptive of the image the individual node within the plurality of nodes in the semantic hierarchy that has the highest reward weighted likelihood; classifying the input image as a named entity corresponding to the individual node most descriptive of the image using a computer system; and returning the named entity as a classification of the input image using a computer system. - View Dependent Claims (2, 3, 4)
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Specification