PROBLEM TO BE SOLVED: To make it possible to properly call attention in accordance with a visual ability of an individual driver.SOLUTION: A retina projection image estimation unit 12 is configured to estimate a retinal projection image serving as a picture image of an outside world to be projected onto the retina of a driver on the basis of an outside world image, a direction of a driver's visual line, and an eye characteristic of an individual. A retina output image estimation unit 13 is configured to, when the retina projection image is projected onto a retina visual cell array model, estimate a retinal output image serving as a picture image obtained by a responce of a retina visual cell array model. A local area information-amount computation unit 14 is configured to: compute an amount of information for each local area of preset largeness in the retina output image； and, on the basis of the amount of information in the local area, compute a missing risk level map having a location in a field of view of the driver associated with a missing risk level, which becomes higher as the amount of information becomes smaller.SELECTED DRAWING: Figure 1
