Image capturing device and method for determining correction coefficient of autofocus function

摘要

An image capturing device includes a lens, a motor to move the lens, and a variety of modules. The variety of modules includes an interface control module, a module to control the lens movement, a determining module, and an analyzing module. The interface control module displays an input interface for inputting control data. The determining module determines an actual position of the lens according to the basic autofocus function. The analyzing module calculates an optimal autofocus position for the control data input, and determines a ratio between the actual position of the lens and the optimal autofocus position as a correction coefficient. When in use, after the correction coefficient has been set, the input control data is firstly modified according to the correction coefficient, and the lens is moved by the actuator to a modified autofocus position according to the corrected control data.

主权项

1. An image capturing device comprising:
a lens; an actuator to move the lens; a storage unit storing a plurality of modules; and a processor to execute the plurality of modules, wherein the plurality of modules comprises:
an interface control module to display an input interface for a user to input control data for controlling autofocus function;a drive control module to control the actuator to move the lens according to the input control data;a determining module to determine an actual position of the lens after the lens has been moved for autofocus; andan analyzing module to calculate a theoretical autofocus position of the lens according to the input control data, and determine a ratio between the determined actual position and the theoretical autofocus position as a correction coefficient; wherein when in use, after the correction coefficient has been set, the input control data is firstly modified according to the correction coefficient, and the drive control module is further configured to control the actuator to move the lens to the modified autofocus position according to the corrected control data.