Seems that tinypic enforces a maximum size of ~1600 (hence why two of your images appeared the same size), so I've switched the links below to imgbin.
How do this & this compare to your current solution?
Tweaked algorithm defaults: Sample 1: doubled and thinned Sample 2:doubled & thinned
In reply to Re: Thining lines in raster images (Updated to show full resolution.)(Tweaked algorithm)
by BrowserUk
in thread Thining lines in raster images
by Anonymous Monk
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