Specific I can’t seem to rasterize?

[Chapmandu]

Hi, I am trying to remove the paper background of these two sketches. I’ve tried to rasterize but I can’t figure out what’s wrong with my steps. Too much image being removed.
Thank you in advance if you’re able to help!

 

[thebestcpu]

I have created images to make the background white. Not hard to make it transparent from here if that is what you really want.
Hope these are close to what you want
Note that it is pretty difficult when the shade of the pencil lines is about the same as the paper. Would be much easier if the contrast was a bit higher either when drawn or in how the image was scanned. Just a suggestion for the future.
John Wheeler

 

[Chapmandu]

John this is fantastic! Thank you so much and thank you for the suggestions. You have helped me immensely.

 

[thebestcpu]

You’re more than welcome @Chapmandu