FIG. 7 is a schematic flowchart of a method for controlling image capturing provided by the fifth embodiment of the present application. As shown in FIG. 7, the method for controlling image capturing method of this embodiment may include the following operations.

Step 701: capturing images of an object in motion by a first image capturing module continuously.

In this embodiment, the first image capturing module is the image capturing module illustrated in the first to fourth embodiments, which may be a speed measuring camera. The object may be a vehicle. A device with a function of image capturing, such as an area scan camera, can be used to capture at least two images of the vehicle in motion.

Step 702: calculating the number of pixels that the object travels across per unit time on an imaging plane of the first image capturing module.

At step 702, the number of pixels V_p that the moving object travels across per unit time on the imaging plane of the first image capturing module is calculated using the continuously captured images.

In this embodiment, the number of pixels that the image of the object has traveled through per unit time during moving on the imaging plane may be calculated according to two adjacent images captured. The unit time can be every second.

Step 703: determining line frequency for image capturing on the object according to the determined number of pixels.

At step 703, the speed of the object is determined according to the determined number of pixels V_p; and the line frequency for image capturing on the object is determined according to the speed of the object.