Take a look at these: (they work well in IE9, FF and Opera, but Windows Safari or Chrome users should limit their view to the second one Id have to scale something down a big to accommodate their depressed handling)
http://srufaculty.sru.edu/david.dailey/svg/engrave/manylines.svg http://srufaculty.sru.edu/david.dailey/svg/engrave/waterwheel.svg http://srufaculty.sru.edu/david.dailey/svg/engrave/volcano.svg and http://srufaculty.sru.edu/david.dailey/svg/engrave/durer.svg They are animations produced by dragging a series of parallel lines over engravings. The resultant moiré pattern results in differential illusions of movement for different parts of the image depending upon spatial frequencies of the engraving lines in the x and y directions. The effect is consistent with this page (done in HTML a zillion years ago): http://srufaculty.sru.edu/david.dailey/moire/moremoire.html The engravings from the first three are from a funny little book called The magic moving picture book Bliss, Sands & Co. 1898 London and reprinted by Dover Press in 1975 (before Berne copyright treaty). The book comes with an acetate transparency to produce a similar effect. These three were designed with an eye toward animation in mind, and the engraving frequency exploits the dot frequency of the overlay (it is actually much higher in the printed form). The last image is of Albrecht Durer, engraved by Paul Krey in 1885 from Durers famous self-portrait. Engravings are, after all, vectors, but they tend to reflect the curvature of contours, rather than their boundaries, as discussed here: http://srufaculty.sru.edu/david.dailey/engraver.htm . As such, Ive argued, there may be more information in those vectors than in typical boundary files. Cleverly done, as the first three are, they might also capture movement. Cheers David [Non-text portions of this message have been removed] ------------------------------------ ----- To unsubscribe send a message to: [email protected] -or- visit http://groups.yahoo.com/group/svg-developers and click "edit my membership" ----Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/svg-developers/ <*> Your email settings: Individual Email | Traditional <*> To change settings online go to: http://groups.yahoo.com/group/svg-developers/join (Yahoo! ID required) <*> To change settings via email: [email protected] [email protected] <*> To unsubscribe from this group, send an email to: [email protected] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
