Janette Reynolds photo help

Met with Greg Lawrence, an area photographer and digital guru, who in his retirement is doing some amazing free work for local historical societies and archives. I gave him the original of the Janette Reynolds (Class of 1873, first professional librarian here,) photo. As can be seen in this thumbnail, she was shot wearing a dark dress against a dark background, the photo is scratched etc. I could do some of the scratches, but doing something about the contrast and background is well beyond me. Greg is going to scan at very high resolution, work it out pixel by pixel, am looking forward to seeing it.