SUBJECT TRACKING APPARATUS, CONTROL METHOD, IMAGE PROCESSING APPARATUS, AND IMAGE PICKUP APPARATUS

摘要

The subject tracking apparatus comprises: a first registering unit configured to register a partial area as a template indicative of a subject in one image of supplied images; a first matching unit configured to estimate a subject area by collating a partial area in newly supplied images with the template registered by the first registering unit; a second registering unit configured to register a histogram generated based on a pixel value of a partial area indicative of the subject in one image of supplied images; a second matching unit configured to estimate a subject area by collating a histogram of a partial area in newly supplied images with the histogram registered by the second registering unit; and a tracking area determination unit configured to determine a tracking area based on estimation results by the first matching unit and the second matching unit. The first registering unit and the second registering unit allow at least one of the template and the histogram previously registered to be updated, and the update for the registration of the template by the first registering unit is more frequently than that for the registration of the histogram by the second registering unit.

主权项

1. A subject tracking apparatus that tracks a subject included in images that are sequentially supplied, the apparatus comprising:
a first registering unit configured to register a partial area indicative of the subject in one image of the supplied images as a template; a first matching unit configured to estimate a subject area by collating a partial area in a newly supplied image with the template registered by the first registering unit; a second registering unit configured to generate a histogram based on a pixel value of a partial area indicative of the subject in one image of the supplied images and register the generated histogram; a second matching unit configured to estimate a subject area by collating a histogram of a partial area in a newly supplied image with the histogram registered by the second registering unit; and a tracking area determination unit configured to determine a tracking area based on estimation results by the first matching unit and the second matching unit; wherein the first registering unit and the second registering unit are allowed to update at least one of the template and the histogram previously registered; and wherein the update for the registration of the template by the first registering unit is more frequent than that for the registration of the histogram by the second registering unit.