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Perceptual bias level estimation for hand-drawn sketches in sketch-photo matching

US9104942B2 · US · B2

Patent metadata
FieldValue
Publication numberUS-9104942-B2
Application numberUS-201213719231-A
CountryUS
Kind codeB2
Filing dateDec 19, 2012
Priority dateDec 19, 2012
Publication dateAug 11, 2015
Grant dateAug 11, 2015

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  5. First independent claim

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Abstract

Official abstract text for this publication.

This invention, which relates to retrieving an object from a video or a photo where the object matches a hand-drawn sketch, discloses a method for automatically estimating a perceptual bias level with respect to a feature of the sketch. The method allows estimation based on the sketch alone without involving an extra database. In one embodiment, the method comprises using an expectation-maximization tensor voting (EMTV) method to analyze a statistical distribution of the feature. The statistical distribution is analyzed by forming an objective function having the statistical distribution's information parameterized by the perceptual bias level, and then maximizing the objective function according to a set of iterative update rules. In another embodiment, the method for automatically estimating a perceptual bias level is incorporated into a method for retrieving one or more objects from an image or video database where the one or more objects match a hand-drawn sketch.

First claim

Opening claim text (preview).

What is claimed is: 1. A method for retrieving one or more objects from an image or video database with the use of perceptual bias levels where the one or more objects match a hand-drawn sketch, the method comprising: selecting one or more candidate features; for a chosen candidate feature among the one or more candidate features, estimating a perceptual bias level with respect to the chosen candidate feature of the sketch, so as to generate a perceptual bias level for each of t…

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What does patent US9104942B2 cover?
This invention, which relates to retrieving an object from a video or a photo where the object matches a hand-drawn sketch, discloses a method for automatically estimating a perceptual bias level with respect to a feature of the sketch. The method allows estimation based on the sketch alone without involving an extra database. In one embodiment, the method comprises using an expectation-maximiz…
Who is the assignee on this patent?
Hk Applied Science & Tech Res
What technology area does this patent fall under?
Primary CPC classification G06V40/168. Mapped technology areas include Physics.
When was this patent published?
Publication date Tue Aug 11 2015 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
What related patents are in patentsdb?
We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).