Image to Contour Filter
This kind of filters gets an 3 channel image as input and returns a collection of contours of paths as result. Once your bitmap or raster image has been converted to vector it can be scaled to any size without any loss in quality. This is kind of filters are required to convert your image to GRBL code.

To Contours
Scannes the outline of the black areas and generates vector data. The vector data has an height of 0.
Effect

Pipeline Configuration
###########################################################################################
# Calculate the contour from the "BLACK" parts of the image.
###########################################################################################
#
[processing.image.to_contours.Filter]
# Not visible in the menu bar
#
menu = false