@Vikram_Subbaiah the master himself has done a few image data extractions during his time on the forum. Perhaps he can advise? (I was toying around with this today as well and got some of the extraction working using your workflow @Marcel_Rijsmus 
)
Or perhaps this workflow could be massaged… by converting your image to black and white?
https://forum.dynamobim.com/t/from-image-pattern-too-curve-geometry/11151/5