An image processing device is an image processing device including a control unit configured to control a scan frequency of a region of an imaging unit, and an analysis unit configured to analyze a captured image captured in the imaging unit, and the analysis unit is configured to analyze the captured image to detect an optical signal transmitted from a signal source, identify an attribute of the signal source on the basis of information included in the detected optical signal, and set a region including the signal source in the captured image in a region with a different scan frequency, and the control unit is configured to control a scan frequency of the imaging unit for each region that is set in the captured image.