Patent ID: 8004597

Claim:
A focusing control apparatus, applied in an image recording system, the focusing control apparatus comprising: an evaluating unit for generating, according to an image sensed by a sensor, a plurality of focus values of the image; and a control module for calculating a weight focus value in accordance with the focus values, and selectively generating a control signal based on the weight focus value and a depth of focus table, so as to control the movement of a lens of the image recording system; wherein the depth of focus table is established based on at least a default parameter; wherein the default parameter is selected from the group consisting of a focal length, a pixel size of the sensor, F number and a moving range; wherein the depth of focus table is established based on the following equation: HD=(1+(FL/2× F num )/( SP× 2))×FL; wherein HD is a hyperfocal distance; FL is the focal length of the lens; F num is F number; and SP is the pixel size of the sensor.