1. An automatic inspection apparatus for determining the location of a selected image in an image field whereby said selected image is optically differentiatable from the surrounding area of the image field, said apparatus comprising: (a) a beam device, (b) means for moving the beam of said device for line scanning said image field, (c) means for generating an output signal on said line scanning means, (d) means for modulating said output signal in accordance with variations in the image field scanned by the beam of said beam device, (e) means for causing the beam of said beam device to scan said selected image and to be modulated in response to radiation from said selected image, (f) means for providing an inflection in said outputs signal when said beam scans across said selected image, and (g) an analyzing circuit operable to receive said output signal, (h) said analyzing circuit including means for generating a code responsive to said inflection in said output signal, (i) said generated code being indicative of said selected image in the image field scanned.