In this embodiment, due to the specific arrangement of the first image capturing module and the second image capturing module, the distances h and H are equal or almost equal. Therefore, in the practical process of determining the line frequency for image capturing Q on the object, it is not necessary to measure the distance h and the distance H by using ranging modules. It only needs to measure the number of pixels V_p that the image of the object passes through per unit time on the imaging plane of the first image capturing module, so as to determine the line frequency Q according to the parameters intrinsic to the first image capturing module and the second image capturing module quickly, conveniently and without being affected by external interferences, and thereby facilitate eliminating the deformation of images that would otherwise occur during the image capturing due to stretch or compression, at a lower cost.

In this embodiment, the first image capturing module may further be provided with an infrared fill light and an infrared light filter, in order to obtain an image of the object in a relatively dark environment. During daytime, the invisible light can be filtered through the infrared filter to reduce the interference of invalid light; and the infrared fill light can be turned on at night to provide supplementary light for the image capturing, so that desired images can be acquired throughout the day.

This embodiment of the present application further provides a device for controlling image capturing, including: a speed measuring unit, a determining unit, and a control unit.

The speed measuring unit is configured to measure the speed of an object.