Method and apparatus for image search using feature point

摘要

A method and an apparatus search an image using a feature point. The image search method extracts at least one feature point from an image and describes the extracted at least one feature point in stages, thereby generating a hierarchical feature point descriptor. In addition, the method may search for information matching the feature point descriptor from a local database (DB) included in a terminal or a remote DB included in a server.

主权项

1. A server performing an image searching method, the server comprising:
a processor comprising: a descriptor reception unit configured to receive a feature point descriptor in a compressed state from a terminal connected via a network; a feature point recovery unit configured to recover at least one feature point by decompressing the compressed feature point descriptor; and an information search unit configured to search for information matching the at least one feature point in a remote database (DB) based on the recovered at least one feature point, wherein the terminal is configured to calculate an error rate of the feature point descriptor, and to determine whether to additionally describe at least one grid cell located around the at least one feature point based on the error rate, and wherein the feature point descriptor is information that describes the at least one feature point through an orientation and a position of at least one grid cell located around the at least one feature point.