Abstract: An imaging pickup apparatus includes a lens module and a motor. The body includes a camera module configured for sensing an image. The motor is configured for driving the lens module to move in increments that are multiple steps of the motor. The multiplier used are “x” and “y” during an auto focus process. The image pickup apparatus includes a preset step number. Initially, the motor drives the lens module to move by increments of “x” steps. When the number of steps moved by the motor is greater than or equal to the preset step number, the motor drives the lens module to move by increment of “y” steps.

Abstract: An exemplary automatic focusing system adopted in a camera includes a brightness detecting unit, a recording unit, a correcting unit, and a selecting unit. The brightness detecting unit is configured for detecting a general brightness value of an environment of a subject prior to a focusing operation of the camera and outputting a correction factor associated with the general brightness value. The recording unit is configured for storing a first set of brightness values and the first set of contrast values. The correcting unit stores a preset brightness value and a preset contrast value. The correcting unit is configured for calculating a number of second contrast values according to the correction factor, the first set of brightness values, a preset brightness value, and a preset contrast value. The selecting unit is configured for choosing a maximum contrast value from the number of second contrast values of the subject.

Abstract: An imaging pickup apparatus includes a lens module and a motor. The body includes a camera module configured for sensing an image. The motor is configured for driving the lens module to move in increments that are multiple steps of the motor. The multiplier used are “x” and “y” during an auto focus process. The image pickup apparatus includes a preset step number. Initially, the motor drives the lens module to move by increments of “x” steps. When the number of steps moved by the motor is greater than or equal to the preset step number, the motor drives the lens module to move by increment of “y” steps.

Abstract: An exemplary automatic focusing system adopted in a camera includes a brightness detecting unit, a recording unit, a correcting unit, and a selecting unit. The brightness detecting unit is configured for detecting a general brightness value of an environment of a subject prior to a focusing operation of the camera and outputting a correction factor associated with the general brightness value. The recording unit is configured for storing a first set of brightness values and the first set of contrast values. The correcting unit stores a preset brightness value and a preset contrast value. The correcting unit is configured for calculating a number of second contrast values according to the correction factor, the first set of brightness values, a preset brightness value, and a preset contrast value. The selecting unit is configured for choosing a maximum contrast value from the number of second contrast values of the subject.