1. An object insertion system for inserting a portion of a model image into an image signal, comprising: a camera that obtains the model image; an image extractor that determines an image component of the image signal; and an image processor that determines the portion of the model image to be inserted into the image signal from the model image obtained by the camera, extracts the portion of the model image from the model image, and inserts the portion of the model image into the image signal as the image component, wherein the image processor determines the portion of the model image from the model image obtained by the camera based on the image component of the image signal determined by the image extractor.