Edges
Contour
Isolines by brightness level, the way a topographic map draws terrain.
Controls
- levels
- How many tonal steps get a line. Few gives rare contours, many a dense topographic net
- blur
- Softens the picture before the levels are cut. Without it grain breaks every contour into crumbs
- thickness
- A number from 1 to 4 pixels, 1 by default.
- fill
- Paints the bands between the lines as well, turning the map into a stepped portrait that competes with them
- contrast
- A number from -1 to 1, 0 by default.
- invert
- On or off, off by default.
- ink
- A colour, #ffffff by default.
- paper
- A colour, #000000 by default.