Imaging device including target tracking function

摘要

An imaging device includes an imaging unit capturing an image of a subject, and tracks, through images captured in time series, an area in which a specific target appears. The device includes a parameter acquiring unit acquiring a photographic parameter from the imaging unit, a target area determining unit determining an area of a captured image including the specific target as a target area, a track area adjusting unit setting a track frame for a track area to track the target area including the specific target and adjusting a size of the track frame based on the photographic parameter, and a track area searching unit searching the captured image for the track area, while moving the size-adjusted track frame, based on a similarity between a characteristic amount of the track area of a current captured image and that of the target area of a previous captured image.

主权项

1. An imaging device comprising an imaging unit capturing an image of a subject, and tracking, through images captured in time series, an area in which a specific target appears, comprising:
a parameter acquiring unit configured to acquire a photographic parameter from the imaging unit; a target area determining unit configured to determine an area of a captured image including the specific target as a target area; a track area adjusting unit configured to set a track frame for a track area to track the target area including the specific target and adjust a size of the track frame based on the photographic parameter; and a track area searching unit configured to search the captured image for the track area, while moving the size-adjusted track frame, based on a similarity between a characteristic amount of an image in the track area of the captured image in question and that of an image in the target area of a captured image immediately before the image in question in time series, wherein: the photographic parameter comprises at least two parameters which are a focal length and an imaging distance of the imaging unit, and the track area adjusting unit uses the focal length and the imaging distance of the imaging unit as the photographic parameter.