Patent ID: 8878980
Filing Date: 2014-11-04
Classification: G02B,H04N

Abstract:
1. An image signal processing device, comprising: an imaging means including a focus lens; a point light source detection means for detecting a point light source in a target area used to calculate a focus evaluation value, the focus evaluation value to be used to move the focus lens to an in-focus point; an evaluation value calculation means for identifying a point light area, within the target area, having the point light source detected by the point light source detection means, and for calculating a focus evaluation value for each position of the focus lens, for a remainder area obtained by removing the point light area from the target area; and a system control means for controlling the focus lens based on the focus evaluation value calculated by the evaluation value calculation means, and for controlling an operation during a time period starting when autofocus control is started and ending when the focus lens is set to an in-focus state; wherein during a time period in which the evaluation value calculation means calculates the focus evaluation value for each position of the focus lens, the system control means conducts a control operation to keep the point light area unchanged.