Commonalities among seemingly unrelated things always intrigue. The lay of the land around Ipiales, Colombia at one thousand feet altitude has similarities with photomicrographs of plant stem tissue. They hint at universal rules governing how areas and volumes apportion themselves. The wealth of property owners, topographical features and human politics conspire to shape pastures and roads in particular ways. Similar logistics affect cell growth and division. Unless cancerous, cell size and shape are limited by the availability of nutrients, signalling from other cells and their own internal 'software' realized through DNA.
The following recipe, in a vague way, may ape some of these logistical rules. It generates a grayscale mask that usually becomes a part of a larger project. This particular recipe divides a surface into irregular cobblestones, perhaps, or cells, or pastures nestled between roads. Pick your interpretation.
gmic 512,512,1,1 -noise 0.07,2 --bandpass[-1] 0.0003,0.001 -normalize[-1] 0,255 --threshold[-1] 80 --thinning[-1] \
-dilate_circ[-1] 6 -normalize 0,255 --blur[-1] 4 -normalize[-1] 0,255 --threshold[-1] 120 -display -o road.png
|A sparse scattering of white pixels, courtesy of the
||There are two complimentary ways to view images. We are most familiar with the spatial - regions of dark and light over a surface. The other view regards images as arising from signals of varying frequencies which interfere with each other constructively or destructively. The
As noted in Images as Datasets,' the output of G`MIC commands may not be apt for image file formats. In particular, the average value of the dataset produced by the '--bandpass' command is very near zero, with minima negative and maxima positive.
By thresholding, we've done some setup for the follow-on
||The last image in the pipeline can serve as a mask in downstream processes. Because it is not adorned in color or any detail, it is open to a number of interpretations: fields nestled among roadways, cellular tissue, and cobblestones all suggest themselves. Indeed, the other images in the pipeline can each serve as departure points to other images. A few possibilities follow this table.|
Road Systems, Maybe - Page 2