Fig. 1. Length by diameter class (LD) curves for scanned image diameter estimation of 0.947 mm diameter wire at three resolutions, 15.2 p mm^-1 (66 = 0.066 mm width pixels), 27.6 p mm^-1 (36 = 0.036 mm width pixels), and 42.1 p mm^-1 (24 = 0.024 mm width pixels). Data are the same as those in Fig. 3, sharpened- scan. Scanner setting: color photograph, high-resolution printer output, saved as tiff files. Diameter class size was set at 0.01 mm.