1. A target moving object tracking device comprising: a picture image memory configured to store a time series of real picture images taken by a video camera with regard to an inspection zone covering a possible target moving object; a display configured to display selective one or ones of said real picture images at a desired magnification; an outline image processor configured to provide outline images respectively from said real picture images; a template memory configured to store a template image identifying said target moving object; a moving object locator configured to compare each one of said outline images with said template image to detect a partial area of each outline image that matches with the template image, said moving object locator obtaining positional data of the target moving object within the inspection zone based upon the partial area detected to be in match with said template image; enlarged picture generation means configured to extract, based upon said positional data, an enlarged image from a portion of said real picture image corresponding to the partial area of said outline image detected to match with the template image, and to display the enlarged picture image on said display; wherein said moving object locator is configured to extract a moving object outline image from each of said outline images in correspondence to said partial area detected to be in match with said template image, template updating means is provided to update said template image by replacing it with a combination of a current one of said moving object outline images with previous one or ones of said moving object outline image, wherein said moving object locator comprises matching means which is configured to collect different partial areas out of said outline image, each areas being of the same size of said template image, to calculate a correlation with regard to each of said different areas, and to determine the partial area having a maximum correlation as said moving object outline image in match with said template image, and said template updating means is configured to obtain a pixel value for each of pixels in said moving object outline image so as to add the pixel value to each corresponding one of the pixels in the previous moving outline image, and wherein said outline image processor is configured to give the outline image of binary data in which the pixel value of “1” is assigned to the pixels constituting an outline of the outline image and the pixel value of “0” is assigned to the remainder pixels of the outline image, said matching means is configured to select the pixels from said template image corresponding to the pixels constituting the outline within each of said partial areas of said outline image, and obtain a number of the pixels having a pixel value of greater than “0” around each of the selected pixels so as to weight the pixel value for each of the selected pixels in accordance with thus obtained number of the pixels, said matching means being configured to define said correlation as the sum of thus weighted pixel values of the selected pixels of the template image.