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A local region image tracking apparatus continuously tracks an arbitrary local region within a search image which is described by search image data by comparing the search image data and reference image data related to the arbitrary local region having a size of am pixels by bn pixels with respect t

A local region image tracking apparatus continuously tracks an arbitrary local region within a search image which is described by search image data by comparing the search image data and reference image data related to the arbitrary local region having a size of am pixels by bn pixels with respect to input image data, where the search image has a size larger than am pixels by bn pixels, and a, b, m and n are natural numbers. The local region image tracking apparatus includes correlation computing circuit for computing a correlation between reference image data related to a reference image having a size of m pixels by n pixels and the search image data a plurality of times while moving a position of the reference image with respect to the search image, and for outputting correlation values respectively indicating a computed correlation, and a correlation value accumulating circuit for accumulating the correlation values output from the correlation computing circuit, and for outputting a correlation value indicative of a correlation between the search image data and reference image data related to an equivalent of a reference image having a size of am pixels by bn pixels.

대표청구항 ▼

[ What is claimed is:] [1.]1. A local region image tracking apparatus for continuously tracking an arbitrary local region within a search image, defined by search image data of a size greater than am by bn pixels, by comparing the search image data of the search image and reference image data, relat

[ What is claimed is:] [1.]1. A local region image tracking apparatus for continuously tracking an arbitrary local region within a search image, defined by search image data of a size greater than am by bn pixels, by comparing the search image data of the search image and reference image data, related to the arbitrary local region and of a size of am by bn pixels, where a, b, m and n are natural numbers, a>1 and b>1, said local region image tracking apparatus comprising:correlation computing means for computing a correlation between each of plural sub-reference images comprising respective contiguous portions of a common reference image and defined by respective sub-reference image data, each of a size of m by n pixels, while moving said sub-reference images in individual succession from initial contiguous positions to subsequent contiguous positions thereof with respect to said search image, and for outputting plural correlation values respectively indicating respective, computed correlations between each of the plural, moved sub-reference images and corresponding portions of said search image; andcorrelation value accumulating means for accumulating the plural correlation values output from said correlation computing means, and for outputting a correlation value indicative of a correlation between said search image data and reference image data related to an equivalent of a reference image having a size of am by bn pixels.