Importance

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Abstract

Extracting, from an identical original image, regions estimated to correspond to a principal portion thereof, respectively, by means of a plurality of mutually different extracting methods for extracting from an original image a region estimated to correspond to a principal portion thereof, and evaluating the extracting methods by comparing with respect to a plurality of original images, on the one hand, the regions estimated to correspond to the principal portion and extracted respectively from the identical original image by the extracting methods and, on the other hand, a region corresponding to the principal portion of the identical original image, or a region having a high probability of being a region corresponding to the principal portion of the identical original image and determined on the basis of the regions estimated to correspond to the principal portion and extracted respectively by the extracting methods; setting in advance a weight with respect to each of the extracting methods in correspondence with a result of evaluation; extracting regions estimated to correspond to a principal portion, respectively, from an original image from which the principal portion is to be extracted, by the extracting methods; weighting each of the extracted regions by the weight set for each of the extracting methods; and determining a region having a high probability of being a region corresponding to the principal portion of the original image, based on a result of the weighting. A region corresponding to a principal portion of the original image is determined appropriately with a high probability.

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First Claim