Image discrimination apparatus
AssigneeMitsubishi Electric Corporation
InventorsDaiki Kudo, Hirofumi Nishikawa, Yoshiaki Kato
Life of this patent
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Abstract
An image discrimination apparatus includes an inter-frame distance calculating unit 2 for calculating an inter-frame distance which is a distance between features from the feature of a current frame extracted by a feature extracting unit 1 and the feature of an immediately-preceding frame stored in a feature buffer 3, and a cut-point-determination data calculating unit 4 for calculating statistics values of inter-frame distances and calculating a threshold for determination of cut points from the statistics values. The image discrimination apparatus compares the inter-frame distance of the current frame with the threshold for determination of cut points to determine a cut point from the comparison result.
Claims3
An image discrimination apparatus comprising:
- a feature extracting unit to extract a feature indicating a feature of an image from an image signal;
- a distance calculating unit to calculate a distance between features from a feature currently extracted by said feature extracting unit and a feature extracted last time by said feature extracting unit;
- a threshold calculating unit to calculate a statistics value of distances between features which have been calculated by said distance calculating unit, and for calculating a threshold for determination of cut points from the statistics value;
- and
- a cut point determining unit to compare the distance between features calculated by said distance calculating unit with the threshold calculated by said threshold calculating unit to determine a cut point from a result of the comparison, wherein
- the threshold for determination of cut points is calculated based on an equation:
- Thi—n=avgi(Distn)+α*vari(Distn)
- where avgi (Distn) is an average of the distances, α is a coefficient, and vari (Distn) is the variance of the distances.
Dependencies are inferred from the claim text.