OpenCV update, Heaviside Step Function, deriving parametric functions of shapes, Sobel filter

[noel]

For those whom interested:
To use the latest openCV library (4.4.0 at the time of this post) you need to paste the jar’s and dll in a folder “code” within your sketch folder.
I’ve prepared a zip of this folder with all the jar’s build and dll. You can download it here.
I also made a new repository here, where I plan to post various codes that can’t be done with the older openCV-processing version. An example is for example the warpAffine function.

@noel

I need to retrieve the hierarchy array (outer (parent) and inner (child) shapes) of the contours. The methods of OpenCV_processing lib do not give access to that,

This I also solved and posted it on my repo here. It uses the same image and thus the same result as on the openCV tutorial about hierarchy. This is handy when you convert contours into shapes and you want holes in them.