Image Processing - Removing grid lines from graph image

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Victor Luna
Victor Luna 2019-1-29
Hi,
I`m not very experienced with image analysis. I have some graphs like the one below and I`m seeking to automatically get tabular values for the lines. My main problem is getting rid of the grid lines to keep only the data lines in the graph so I can work with them. I did some searching and tried bothat and hough transformation but did not got good results, probably for bad use of the filters. Anyone can provide some guidance?
Teste-Fig6.png

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