Image capturing device and auto-focus method for same

Abstract

An image capturing device includes a taking lens, an image sensor for capturing images of an object, an auto-focus system for focusing the image capturing device, and a memory. The memory stores an offset value represented between a pre-focus position and an in-focus position of the taking lens. The auto-focus system includes an image processing unit, a calculating unit, and a taking lens driving unit. The image processing unit is configured for comparing definition of the images to judge a clearest image therefrom, and detecting the pre-focus position of the taking lens. The calculating unit is configured for calculating the in-focus position of the taking lens according to the pre-focus position detected by the image processing unit and the offset value. The taking lens driving unit is used for moving the taking lens during focusing process.

Dependencies are inferred from the claim text.