1. An image forming apparatus, comprising: a face recognition section configured to calculate a matching rate based on an information indicating image feature of a face of a person, detected from an periphery image that is an image of the periphery of image forming apparatus and an information indicating image feature of a registered image which is an image of a face of a user registered to the image forming apparatus in advance, wherein the matching rate correlates a distance between the image forming apparatus and the person whose face is detected from the periphery image; and a printing control section configured to control a printing process having a plurality of processing stages, each processing stage being associated at least in part with a respective threshold in one or more thresholds, the printing control section configured to compare the matching rate to at least one of the one or more thresholds, and wherein the printing control section performs a first printing related process that does not need to specify a detected person as a specific user in response to the matching rate exceeding a first threshold relating to accuracy of detection, and wherein the printing control section performs a second printing related process associated with a group of users in response to the matching exceeding a second threshold relating to the accuracy of detection, and wherein the printing control section performs a third printing related process associated with a specified user in response to the matching rate exceeding a third threshold relating to the accuracy of detection, the third threshold being higher than a second threshold which is higher than the first threshold.