Filter idea

Hi there,

I would like to create a photofilter that simulates the blurring and blending effects that occur when using a photocamera with open aperture (i.e. blurring effects in the back- or foreground with these typical lens flurs highlighting the
brighter spots when blurring...

You know what I mean I guess

For that you need two input-photos: The original photo you want to add the blurring/lens flare effects and second you need a depth-map that represents the
out ouf focus areas according to the distance. There is a simalar filter already included in Photoshop (in German its called "Verwackeln" - dont know the english term).

So me question: Is there a possibility to give two input photos in ff to create this effect more efficiently and with more variations to lens flares?

Maybe someone would like to try such a filter - I dont have an idea yet...

Thanks,
rilos