Image inspection device and image forming system

An image inspection device that determines a defect in an image of a surface to be inspected of a printed matter, based on a comparison between a captured image obtained by capturing the surface to be inspected and a master image, wherein the master image is a previously prepared correct image,

• the image inspection device comprising a hardware processor that acquires the captured image and the master image, wherein
• the hardware processor:
• individually divides the captured image into a plurality of regions and divides the master image into a plurality of regions;
• acquires region information about an image in one of the regions in the captured image and an image in a corresponding region in the master image;
• specifies a predetermined processing technique of image alignment from among a plurality of types of processing techniques for the region based on the region information;
• executes at least an alignment process in relation to the region information as a process before the comparison by the specified alignment technique;
• and
• compares the captured image and the master image, on which the process before the comparison has been performed, and performs defect determination as to whether there is a defect in the captured image based on a comparison result.