Local feature extraction apparatus, control method therefor, and computer-readable medium

摘要

An information processing apparatus includes: a calculation unit adapted to analyze an image and calculate an intermediate value; a setting unit adapted to set a feature extraction region in the image, using the intermediate value; and an extraction unit adapted to extract a local feature of the feature extraction region, reusing the intermediate value used by the setting unit.

主权项

1. An information processing apparatus comprising:
an obtaining unit configured to analyze an image and obtain an intermediate value; a setting unit configured to set a feature extraction region in the image, using the intermediate value, wherein an area of the feature extraction region gradually expands after processing for setting the feature extraction region has started and until the processing has been completed; an extraction unit configured to extract a feature point from the feature extraction region, by reusing the intermediate value used by the setting unit; and an acquisition unit configured to acquire a local image feature amount of the feature point, by reusing the intermediate value used by the setting unit, wherein, after the processing for setting the feature extraction region has started, the setting unit measures the area of the feature extraction region and, when the area is greater than or equal to a predetermined value, stops the processing and sets the feature extraction region to the entire image.