| 摘要 |
Provided is an autofocus system provided with an automatic tracking function, in which occurrence of mistracking can be suppressed when the angle of view is changed by zooming. The autofocus system has: an imaging unit which captures an image of an object formed by an optical system; an autofocus portion which performs focus adjustment of the optical system so that the object within an autofocus area set in the captured image comes into focus; an AF area tracking processing portion which performs tracking processing to set a predetermined object within the autofocus area as a target to be tracked, detect a presence area of the target to be tracked in an image newly captured by the imaging unit and determine the presence area as a new autofocus area; a depth-of-field computing portion which calculates the depth of field; and a control portion which controls execution of the focus adjustment and the tracking processing based on the calculated depth of field. |
