Re: [ft-devel] Signed Euclidean Distance Transform (was Signed distance fields: distance from any point to the glyph contours)

[Vinnie Falco]

On Wed, Oct 31, 2012 at 11:46 AM, Nicolas Rougier
<address@hidden> wrote:
>
> Thanks for the reference and the code. I've been using code from 
> http://contourtextures.wikidot.com since it can handle antialiased images and 
> then I use grayscale rendering of the glyph to increase precision.
>
> Do you know if the Meijster method also handles grayscale images ?

The Meijster algorithm as described only supports 1-bit masks.
However, I have modified it to work with 8-bits per pixel masks using
fixed point calculations. I provide both the original Meijster
implementation and my anti-aliased modification (the member function
calculateAntiAliased()):

https://github.com/vinniefalco/LayerEffects/blob/master/VFLib/modules/vf_unfinished/graphics/vf_DistanceTransform.h

Thanks

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