Feature extraction unit, feature extraction method, feature extraction program, and image processing device

Abstract

Provided is a feature extraction device whereby it is possible, while using local binary patterns, to extract image features with which object detection which is robust against disparities in a photographic environment is possible. A feature extraction unit () comprises: a binary pattern generation unit () which generates, for each of all pixels or partial pixels in an image, local binary patterns which denote, by bit values, whether the difference in pixel values between the pixel and the surrounding adjacent pixels is greater than or equal to a threshold value; a weighting generation unit () which determines, for each generated local binary pattern, a weighting according to the pixel value difference; and a histogram generation unit () which applies the determined weightings to the corresponding local binary patterns and generates a histogram which denotes the distribution of the local binary patterns which are generated from the image.