(PECL imagick 2.0.0)
Imagick::vignetteImage — Adds vignette filter to the image
Softens the edges of the image in vignette style. This method is available if Imagick has been compiled against ImageMagick version 6.2.9 or newer.
The black point.
The white point
X offset of the ellipse
Y offset of the ellipse
Returns TRUE on success.