1. An image processing apparatus comprising: an object setting section that generates an object image, wherein the object image is placed in an image generated by an image capturing section; a detection section that detects the object image included in a synthetic image in which the object image and the image generated by the image capturing section are synthesized; a detection parameter setting section that sets a detection parameter for a detection process performed by the detection section, the detection parameter including a registered region of the image generated by the image capturing section; and an output section that outputs output information based on a detection result of the detection process and issues an alarm if at least one of: (i) the object image enters into the registered region; or (ii) the object image remains within the registered region for more than a predetermined amount of time, wherein the detection parameter is configured to be changed based on the output information.