Draw circle dithering

[troyd1]

Im am using IM 6.7.0 q16 on windows xp. I am trying to use the draw circle command. I did convert testsave.png -stroke blue -fill blue -strokewidth 2 -draw "circle 20,20 20,25" test.png.

I have some different colors on this image and after doing it, it did not look completely blue. I used instant eyedropper and it was dithering. I looked at the examples on the IM help site and they are all dithered as well. Is there an easy wasy to make my circle with *ONLY* blue pixels?

[el_supremo]

Turn off antialiasing - but it won't look as good:
convert testsave.png -stroke blue -fill blue -strokewidth 2 +antialias -draw "circle 20,20 20,25" test.png

Pete

[troyd1]

Perfect. Thanks, just what I needed.

[anthony]

You can reduce the stroke width (working minimum is 1.0) or turn it off (the default) using -stroke none