Vehicular projection control device and head-up display device

A vehicular projection control device comprising:

• a memory that stores a program that comprises instructions;
• and
• a processor that executes the instructions, wherein the instructions cause the vehicular projection control device to operate as:
• a vehicle information acquirer configured to acquire vehicle information containing a vehicle speed of a host vehicle;
• a visibility information acquirer configured to acquire visibility information on a road on which the host vehicle travels;
• a virtual mobile body video generator configured to generate a virtual mobile body video of a virtual mobile body, which is to be projected by a projection unit of a head-up display device as being moving ahead of the host vehicle in a same direction as the host vehicle;
• a projection controller configured to control projection of the virtual mobile body video by the projection unit of the head-up display device, such that a virtual image of the virtual mobile body video generated by the virtual mobile body video generator is visually recognized in front of the host vehicle;
• and
• a video data acquirer configured to acquire video data from an image capturer for capturing a front of the host vehicle,
• wherein the projection controller controls projection of the virtual mobile body video, on a basis of the visibility information acquired by the visibility information acquirer,
• the visibility information acquirer acquires the visibility information, on a basis of video data acquired by the video data acquirer,
• when it is determined that visibility around the host vehicle has lowered on a basis of the visibility information acquired by the visibility information acquirer, the projection controller controls projection of the virtual mobile body video, such that a virtual image of the virtual mobile body video generated by the virtual mobile body video generator is visually recognized in front of the host vehicle,
• the visibility information acquirer acquires, as the visibility information, lighting information indicating intervals between lighting devices around the host vehicle, on the basis of video data acquired by the video data acquirer, and
• when it is determined that the intervals between lighting devices around the host vehicle are wider than a threshold on a basis of the visibility information acquired by the visibility information acquirer, the projection controller controls projection of the virtual mobile body video, such that a virtual image of the virtual mobile body video generated by the virtual mobile body video generator is visually recognized in front of the host vehicle.