A shoulder strap retaining device configured to assist in retaining a shoulder strap or other similar device in a desired position upon a person. The amplifier circuit includes an input stage, an intermediate stage, an output stage and a detecting and controlling circuit. The cooling suppresses the temperature of the substrate to a temperature less than the temperature required for the formation of nickel silicide. A corresponding plurality of images is determined in accordance with the plurality of image quality metrics and an image is selected according to a predetermined image criterion to provide a selected image.