Systems and methods for generating a high-level visual vocabulary

A device comprising:

• one or more computer-readable media configured to store instructions;
• and
• one or more processors configured to cause the device to
• generate mid-level visual words based on a plurality of low-level features that were extracted from images;
• generate inter-mid-level visual-word relationships based on mid-level visual-word-label relationships;
• and
• map the mid-level visual words to a vector space based on the inter-mid-level visual-word relationships.

One or more computer-readable media storing instructions that, when executed by one or more computing devices, cause the one or more computing devices to perform operations comprising:

• generating inter-visual-word relationships between a plurality of visual words based on visual word-label relationships;
• mapping the visual words to a vector space based on the inter-visual-word relationships;
• and
• generating high-level visual words in the vector space based on respective positions of the visual words in the vector space.

A method comprising:

• generating inter-visual-word relationships between a plurality of visual words;
• generating sets of importance weights for the visual words, wherein a set of importance weights includes a respective weight for each of the visual words;
• mapping the visual words to a plurality of vector spaces based on the inter-visual word relationships and on the sets of importance weights, wherein each vector space corresponds to a respective one of the sets of importance weights;
• and
• generating high-level visual words in the plurality of vector spaces.