On Tue, 04 Jan 2005 07:23:47 -0600, Bob Jamison <rjamison@...357...> wrote:
Ok.. once more. After talking to Mental, I changed the Color and Monochrome quantized multiscans a bit. In addition to the tiling of color regions side-by-side, they now can stack color regions atop each other, the same way the Brightness Multiscan works. It makes for a fairly good vector rendition of an original:
http://troi.hous.es3.titan.com/~rjamison/inkscape/files/multiscan_stack.png
Thanks! Now this is a very powerful tool. I'm really impressed. This is something you cannot easily do with plain potrace.
Questions:
- Within "multiple scanning", what's the difference between "brightness" and "monochrome"? They give different previews but very similar results. Besides "brightness" is confusing with the brightness method. I think we should leave only one.
- Import this image (b/w jpeg):
http://www.livejournal.com/userpic/569297/360079
and trace it: multiscan, monochrome, 8 colors. Results are quite good. Now do it again at 9 colors - the result becomes much worse and flatter, as if you reduced the number of colors, not increased it. Then try 10, 11, etc colors: the color resolution does not improve, but the trace becomes darker and darker. After 12 it brightens up again and later starts behaving unpredictably. At 16 colors, each click on Preview gives a different preview image (does not happen at 8 colors). Doing the same in color is similar: the best result is at 8 colors, then starts darkening and degradation, then some wild colors appear. I think this is some bug in the algorithm.
Things to do:
- Since "color" and "monochrome" are in the same radio button group as all the other scanning methods, they should be stacked vertically to align with them.
- Please add tooltips to all widgets in the dialog.
- Please fill in the release note on this feature (http://inkscape.org/cgi-bin/wiki.pl?ReleaseNotes)
- Please prepare a large detailed screenshot with comments, to be added to the site.
Thanks for the beautiful work!