Re: Backend and non-backend (was Re: Stencil bounding box)

[Han-Wen Nienhuys]

David Feuer schreef:
> One possibility:  Take all image elements (on a high level I guess
> this would be grobs, on a low level it'd be stencil pieces).  Separate
> them by type (stems here, noteheads there; rectangles here, glyphs
> there), and within each type sort them by left edge of bounding box,
> bottom edge of bounding box, width, and height.  Count to see if there
> are the same number of elements of each type, then pair up
> corresponding elements and compute the correlation coefficients or
> similar statistics for the coordinates of pairs.


You cannot sort by coordinate: comparing floating point numbers is not 
stable, and the input will have lots of degenerate cases, due to all the 
alignments.



--

Han-Wen Nienhuys - address@hidden - http://www.xs4all.nl/~hanwen

LilyPond Software Design
 -- Code for Music Notation
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