FOCUS ADJUSTING DEVICE, FOCUS ADJUSTING METHOD AND DIGITAL CAMERA

摘要

PROBLEM TO BE SOLVED: To realize focus adjustment with high accuracy and at high speed.

SOLUTION: A focus adjusting method of a digital camera comprises an image signal converting step in which an imaging light entering an optical lens mechanism 102 is converted into an image signal, an extracting step in which a high-frequency component of the image signal is selectively extracted, a signal generating step in which a luminance signal and a color difference signal are generated from the high-frequency component of the image signal selectively extracted and a focus adjusting step in which a focusing position of the optical lens mechanism 102 is adjusted by using a high-frequency component of the luminance signal.

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