Image processing device

An image processing device that generates a display image and is applied to a driving assistance system, which includes:

• a driving assistance device that detects a relative position of a lane marking arranged on a traveling road with respect to a vehicle and assists a driving of the vehicle based on a detected positional information;
• and
• a head-up display device that projects a display image on a projection area arranged on the vehicle to visually recognize a virtual image of the display image,
• the image processing device comprising:
• an acquisition device that acquires the positional information;
• and
• a generation device that generates the display image including a predetermined display element, wherein:
• the generation device generates the display image, based on the positional information acquired by the acquisition device, to visually recognize the display element arranged in an around region including the lane marking when the driving assistance device detects the lane marking;
• when the driving assistance device does not detect the lane marking, the generation device generates the display image to visually recognize the display element as another shape different from a shape of the display element in a case when the driving assistance device detects the lane marking.