CONTINUOUS line art

[steve.ledger]

Hi everyone,

Does anyone know a program or a plugin transforming a bitmap image or photo into a set of horizontal CONTINUOUS vector lines like attached example ?

I'm not altogether convinced your example shown is an image composed of vector data at all. If you have an original vector example I'd like you to post it as a vector?

However, based on ther raster version you attached, I believe a very similar effect is repeatable using PaintShopPro X2's halftone filter set to lines.
This is found under 'Artistic Effects'.