FEATURE POINT LOCATION ESTIMATION DEVICE, FEATURE POINT LOCATION ESTIMATION METHOD, AND FEATURE POINT LOCATION ESTIMATION PROGRAM

摘要

Provided is a feature point location estimation device, whereby fitting of a model is less prone to local solutions, and it is possible to detect a facial feature point with more practical precision. The feature point location estimation device comprises: an image input unit 11 which receives input of a facial image from an external source; a nearest neighbor template computation unit 12 which obtains a nearest neighbor template from among positive examples and a nearest neighbor template from among negative examples, said nearest neighbor templates being the templates nearest to an image that is computed from the inputted facial image using a facial feature point location search parameter from among a plurality of facial image templates constituted by the positive examples and the negative examples; a parameter gradient direction computation unit 13 which computes, from the facial feature point location search parameter and the nearest neighbor templates, a gradient direction of the facial feature point location search parameter; and a search parameter update unit 14 which updates the facial feature point location search parameter by adding the computed gradient direction.

主权项

1. A feature point location estimation device comprising:
an image input unit which receives input of a facial image from an external source; a parameter gradient direction computation unit which computes, from a plurality of facial image templates constituted by the positive examples and the negative examples and the facial feature point location search parameter, a gradient direction of the facial feature point location search parameter; a search parameter update unit which updates the facial feature point location search parameter by adding the computed gradient direction; a convergence determination unit which determines whether the updated facial feature point location search parameter is convergent; and a search result output unit which, when the facial feature point location search parameter is determined as being convergent, outputs a facial feature point location computed by the facial feature point location search parameter as a search result.