Effective visual descriptor extraction method and system using feature selection

摘要

The present invention relates to a method and system for extracting a visual descriptor using a feature selection method. One embodiment of the present invention includes an image input unit for receiving an image, Calculating a degree of importance according to a characteristic of a feature detected at a feature candidate point included in the feature point candidate group and extracting the feature candidate point as a feature point candidate when the degree of importance exceeds a predefined threshold value; A feature point selection section for selecting the feature point candidate having the importance degree equal to or less than a predetermined threshold value, a feature point selection section for selecting a feature point candidate having a degree of importance less than or equal to a predefined threshold value, a feature point main directionality calculation section for calculating a main directionality of the feature point selected by the feature point selection section, And a visual descriptor extracting unit that extracts a patch based on the position, scale, and main direction of the patch, and extracts a visual descriptor from the patch.;