| 摘要 |
A feature amount calculation apparatus is provided that enables an outline of an object such as a silhouette line of a person, and an important feature due to object outline and surrounding image changes, to be extracted by reducing the influence of background noise. A feature amount calculation apparatus (100) calculates a feature amount of a target object from image data, and is provided with: a feature value calculation section (110) that calculates an edge direction and edge magnitude as input image data pixel-unit feature values; a feature amount calculation section (120) that has an edge direction group calculation section that calculates a group of edge directions, and a correlation value calculation section that takes all pixels or a predetermined pixel among a plurality of pixels used in feature value calculation as pixels subject to correlation value calculation and calculates an edge magnitude correlation value between the pixels subject to correlation value calculation for each feature value; and a histogram creation section (130) that counts feature amounts in a histogram for each correlation value, and creates a histogram as a feature vector.
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