Image capturing device, e.g. digital camera, focusing method, involves comparing two positions of focal point determined by focusing and calibration procedures to determine number of adjustments required for positioning focal point

摘要

The method involves implementing a focusing procedure to determine a position of a focal point corresponding to a contrast value. A calibration procedure is implemented for determining another position of the focal point, and the two positions are compared to determine a number of adjustments required for positioning the focal point at a number of positions. The corresponding image at each of the positions is recorded.