Fig. 3. Estimated diameter of 0.947 mm wire. Photographed and scanned images were made at 7 different resolutions and two image adjustments. Camera setting: ASA 200, 1/23 sec, f-16, manual focus. Scanner setting: color photograph, high-resolution printer output, saved as tiff files. Adjustments: original = no image modification; sharpened = image sharpened with Photoshop. See text for parameters.