Patent ID: 8363154

Claim:
A focus error adjusting apparatus for use in a digital image processing device, the focus error adjusting apparatus comprising: a photographing unit comprising a focus motor and an image sensor to capture a first image whose focus is adjusted via a phase detection system, and a second image by changing movement values of the focus motor by referring to the first image; and a digital signal processing unit comprising a control unit that receives the first image and the second image from the image sensor, evaluates the first image and the second image to detect respective high-frequency components by applying a focus adjustment algorithm based on a contrast detection system, and sends an output control signal to the focus motor to correct a focus error associated with the digital image processing device based on the image having the larger high-frequency component, wherein when the first image has a greater high-frequency component than the second image, a correction of the position of the focus lens is determined to be 0, and the focusing adjusting is ended.