1. An image inspection device that inspects a read image obtained by reading an image formed and output on a sheet, the image inspection device comprising: a read-image acquiring unit that acquires a read image generated by reading a formed and output image; an inspection-image generating unit that generates an inspection image used for inspection of the read image, on the basis of information of an image to be formed and output acquired from an image processing apparatus that generates the information of the image to be formed and output; and an inspection-result acquiring unit that acquires a result of determination of a defect in the read image based on a difference between the inspection image and the read image, wherein the image processing apparatus corrects density of the image to be output according to a state of an image forming apparatus that performs image formation and output, to generate the information of the image to be formed and output, and the inspection-image generating unit acquires density correction information in which densities before and after a density of the image is corrected by the image processing apparatus are associated, to generate the inspection image corresponding to the density before the density of the image is corrected by the image processing apparatus, on the basis of the acquired density correction information.