Arc text leaves streaks

[Marvin944]

Hi, when I arc distort text, on certain characters/fonts (highest/lowest) it draws streaks from the center in the font's colour, as if those top/bottom pixels get dragged along. How can I avoid this?

[Marvin944]

Fixed this myself by adding -bordercolor none -border 1x1 to the script.

[fmw42]

try setting -virtual-pixel transparent

[anthony]

Yes the default virtual pixel setting is "edge' when means replicate the images edges out to infinity for any pixel lookup that actually 'missed' the real image. that is lookups of pixels surrounding the real image.

See Virtual Pixels..
http://www.imagemagick.org/Usage/misc/#virtual-pixel

Edge is a good default, but when a object just touches the image edge, it produces the streaks you mention. This is actually used to good effect in some image processing. for example...
Arc Distortion Examples
http://www.imagemagick.org/Usage/distorts/#arc_examples