发明名称 |
Method for extracting low-rank descriptors from images and videos for querying, classification, and object detection |
摘要 |
A method extracts a low-rank descriptor of a video acquired of a scene by first extracting a set of descriptors for each image in the video. The sets of descriptors for the video are aggregated to form a descriptor matrix. Iteratively, a low-rank descriptor matrix is determined from the descriptor matrix, as well as a selection matrix that associates each column in the descriptor matrix to a corresponding column in the low-rank descriptor matrix. The low-rank descriptor matrix is output upon convergence. |
申请公布号 |
US9639761(B2) |
申请公布日期 |
2017.05.02 |
申请号 |
US201414202327 |
申请日期 |
2014.03.10 |
申请人 |
Mitsubishi Electric Research Laboratories, Inc. |
发明人 |
Mansour Hassan;Rane Shantanu;Boufounos Petros T.;Vetro Anthony |
分类号 |
G06K9/46;G06K9/00;G06F17/30;G06K9/64;G06K9/62 |
主分类号 |
G06K9/46 |
代理机构 |
|
代理人 |
Vinokur Gene;McAleenan James;Tsukamoto Hironori |
主权项 |
1. A method for querying a database of videos, comprising:
extracting a set of descriptors for each image in a video of a scene; aggregating the sets of descriptors for the video to form a descriptor matrix; determining a product of a low-rank descriptor matrix and a selection matrix using an orthogonal non-negative matrix factorization of the descriptor matrix, such that each column of the selection matrix has only one nonzero entry and associates a column in the descriptor matrix to a corresponding column in the low-rank descriptor matrix; wherein the factorization comprises:
determining a low-rank factor by a non-negative least squares minimization; anddetermining a selection matrix factor by minimizing a proximal point least squares problem and retaining a largest entry in every column of the selection matrix and setting all other entries to zero; and querying the database of videos including at least one video using the low-rank descriptor matrix to produce a search result, wherein the steps are performed in a processor. |
地址 |
Cambridge MA US |