1 Short tutorial for producing polar patterns:
3 0. Draw an image into a circle. Examples done in Inkscape are in src_images/
5 1. Export the image as a 640x640 bitmap, from command line:
6 $ inkscape -f svgfile.svg -w <newwidth> -h <newheight> -e file.png
8 2. Open the exported image in GIMP (examples are in src_images/raster) and
9 reduce the colors (e.g. to 4 colors). The Posterize tool may be used to
10 reduce the colors. Consider also increasing the contrast.
12 Examples of color reduced images are in src_images/raster_post-processed
14 3. Create the polar pixel map using either:
15 tools/depolar_resample_IMAGEMAGICK.sh
17 tools/depolar_resample_PIL.py
19 4. Some rough retouching on the polar pattern can be done in GIMP:
20 - A full circle is represented by a horizontal line;
21 - A radius is represented by a vertical line.
23 5. Do the final touches to the polar pattern with PoPiPaint>
24 Examples of fine tuned polar patterns are in patterns/
26 6. Export the pattern as animation and upload it to the JMPrope.