Redrobes free Image Processing Tools.

[Redrobes]

Recipe: Gores

I have posted the app on here about Gores before but its for taking a world map (usually one with a 2:1 aspect ratio) and then it projects it into something which has these "leaves" which you cut out and then paste it on to a ball to make a globe. You can use better apps like GProjector and others but this one is pretty easy to use. You set the number of gore leaves to use.

This is one where you can use the attachment id thing. So lets use
https://www.cartographersguild.com/a...6&d=1610625037
So by entering the ID 127766 (its sort of cut off from the link above but if you click on it or hover the mouse you will see it) into the attachment ID box it should load up the guild world map.

Guildworld_4K.jpg

When setting the number of gores to 12 then after processing it gives this:

GuildWorld_Gores.jpg

Which if someone wants to print, cut out and then and wrap around a ball then do post your result !

And it would help if the image didn't have the black border around the image. So if your doing this for a proper project then use a proper world map with just the land masses and seas. Also, use a nice high res image as it doesn't have nice edges on the gores if using a low res image.

[Redrobes]

Recipe:Line Dither

Line dither will dither an image with lines where you can set the angle and it will generate a set of lines at that angle where the thickness of the lines are linked to the brightness of the image.

So starting with this image of Mona Lisa...
MonaLisa.png

it can be dithered to this
MonaLisa_LineDither.png

The reason why this is an interesting dither is that it just uses two colours only black and white and that none of the black lines cross so that it can be cut out of a sheet of paper with a laser cutter for example.

[Redrobes]

Recipe: Line Dither 2

Similar to above but this time it will do the dither with a series of thin black lines at a variety of angles like the old hatching that you used to get on wood block etchings. This is another useful dither because it will generate a greyscale image from just black and white. Therefore you can use this to plot photos on a pen plotter.

MonaLisa_LineDither2.png
(click on the image to see the full effect)

I am sure you can incorporate this sort of effect into maps.

There is another recipe Line Dither 2 with NC where it will output the NC code to drive a laser engraver so that you can engrave these sorts of images onto items. Use that at your own risk and work out how to make the file compatible with your own engraver for best results.