1. An image processing device comprising: a detecting section configured for selectively detecting a plurality of objects of a plurality of types from an input image, wherein the plurality of types of objects includes: moving objects, faces, and stationary objects; a generating section configured to generate, for a given image frame of the input image, one converted image frame for each type of object detected by the detection section, where each converted image frame is based on the given frame of the input image and corresponds to one of the plurality of types of objects detected by the detecting section; and a processing section configured to selectively subject the converted frames to processing, wherein the processing includes generating an output image frame comprising a synthesis of more than one of the converted image frames for the given image frame, wherein the processing section is configured to be capable of selectively synthesizing a plurality of sub-images into the output image, wherein the sub-images selectable by the processing section for synthesizing into the output image include: an image generated by combining an On-Screen Display (foreground image) with an image corresponding to the given image frame of the input image, a converted image frame generated by combining an On-Screen Display (foreground image) with an image corresponding to one of the types of objects detected by the detecting section and adding detection information to the image, the detection information being information indicating those objects that were detected by the detecting section, appear in the image, and are of the type corresponding to the converted image frame, a converted image frame generated by combining an On-Screen Display (foreground image) with an image corresponding to one of the types of objects detected by the detecting section, said image comprising a zoomed in portion of said given image frame corresponding to one those objects that were detected by the detecting section and are of the type corresponding to the converted image frame wherein the image processing device is configured such that a user may select one or more of the plurality of detected objects to be monitored objects, and wherein the plurality of sub-images synthesized by the processing section into the output image includes at least one converted image frame for each monitored object, each converted image frame for a monitored object being generated by combining an On-Screen Display (foreground image) with an image corresponding to the type of the respective monitored object and comprising a zoomed in portion of said given image frame corresponding to the respective monitored object.