What will be an easy way converting digitized negative images to positive images?

[Krikor]

It's always good to have other examples of this technique.
A good example is at:
https://www.dpreview.com/forums/post/58350160

"Get neutral WB in frame edge to remove most overall film tint" - This was a valuable tip in this case.

Otherwise, the well-known procedure of inverting the colors and applying a levels - auto input levels - was used.