X1, Is there a reason you are using color inversions in some of your pictures?
There is reason, indeed : there may be people that wish to print
them - and, with a black background, you get a wet
print and an empty
ex-expensive black cartridge in your printer ! Also, in an inverted colour picture one can possibly distinguish the outlines of the rope segments easier, because the shadows are now white - in between two dark coloured areas ( blue or orange), a white line is perhaps easier to distinguish than a black line. I try to post both pictures, the normal AND the inverted, so one can use anyone he/she wishes. Recently, there was a member that expressed his preference for classic, simple and clear black & white sketches instead of colour photos, and I sympathise this view - so I have tried to convert some pictures to "Pencil Sketch" images, using the so-called tool from the freely available Picasa
program. The hard problem is to convert the pixel/raster images to lines/vector images, but I have not yet found an easy way to do this, using only the freely available programs. The best tool I know for such a conversion is at :http://vectormagic.com/home
With the progress in the technology of 3D scanning and 3D printing, in the near future we will be able to scan our knots using a hand held device, make a 3D model of them, then be able to use this model to make plastic 3D models of them - with a very small cost ! I wonder what will people accustomed to lengthy verbal descriptions of knots
do... Perhaps they will just decide to ignore it, as they did with the mid-nineteen century s invention of photography !