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Colony images obtained with a scanner at different resolutions (1200 dpi to 300 dpi). Differences in the signal-to-noise level are readily apparent. Small colonies in the 300 dpi image are difficult to discern. Both the 600 dpi and 1200 dpi images are able to distinguish all the colonies, though these colonies are sharper in the 1200 dpi image. Two digital cameras (9 megapixel shown here) result in similar quality images to 600 dpi resoltuion. Scale bar is 0.5 mm.
