How to apply vignette image magick filter in ez publish

Hi Im using eZ Publish and wish to apply a vignette filter to a image, how I am not sure how to do so in the image.ini file.

At the moment I have

[frontitem]
Reference=
Filters[]
Filters[]=geometry/scaleexact=800;400

However I开发者_C百科m not sure how to add it, thanks.

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convert input.png -background none -vignette 0x30+10+10 output.png