An image capture device includes an image capture unit, a calculation unit, an assist unit, a determination unit, a storage unit, a processing unit and a first assist light control unit. The image capture unit captures information under current ambient illumination conditions. The calculation unit calculates brightness of the current ambient illumination conditions. The assist light compensates the current ambient illumination. The determination unit determines whether the current ambient illumination is sufficient and whether the current ambient illumination has been compensated. The storage unit stores a first control table. The processing unit activates the first assist light control unit when the current ambient illumination is insufficient. The first assist light control unit looks up a corresponding setting in the first control table using the calculated current ambient illumination, and controls the assist light using the acquired setting.