| 摘要 |
A method of controlling exposure under low brightness conditions, comprising calculating an automatic exposure time such that an exposure time is substantially in inverse proportion to the brightness of a subject; when the automatic exposure time is smaller than a first exposure time value, setting a control exposure time as the automatic exposure time; when the automatic exposure time is greater than or equal to the first exposure time and smaller than or equal to a second exposure time, setting the control exposure time as the first exposure time; when the automatic exposure time is greater than the second exposure time, setting the control exposure time to be substantially in proportion to the automatic exposure time such that the control exposure time is smaller than the automatic exposure time by predetermined steps; and increasing sensitivity according to a difference between the automatic exposure time and the control exposure time. |
