When I draw a small circle, the anti-aliasing is leaving one aliased pixel on the right side of the circle. See below examples:
convert -size 14x14 xc:white -fill black -draw "translate 7,7 circle 0,0 0,5" -alpha off circle5.gif
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convert -size 28x28 xc:white -fill black -draw "translate 14,14 circle 0,0 0,10" -alpha off circle10.gif
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