Restoring old slides

Hi,

My wife's parents passed away many years ago and at the time of the estate settlement, there were some family slide carousels that nobody wanted. I took them with the intention of someday copying and sending them to the relatives. I've finally started to do it, using a nikon macro and film copying attachment. However, the color has faded and shifted terribly over the past 50+ years. I've had some limited succes in fixing them using the neural filters in Photoshop, Topaz Denoise and Capture One, but it's a lot of work per image, and I have hundreds to do. 
I've seen advertisements for AI based photo restoration of old photographs, does anyone have experience with any of them, or recommendations?
Thank you
Scott

As you have numerous slides to scan and correct, you may consider a commercial service e.g.: http://scan-slides.com or https://www.scancafe.com/services/slide-scanning, all off whom offer a colour correction service.

There is colorizing software that does a pretty realistic job of restoring old and faded photos. I just colorized this photo on the MyHeritage genealogy site. I would think there are other sites using this technology. I find it's better to edit photo the best you can first before colorizing it. There is also editing software on MyHeritage that you might want to test out.
                                                                                                                     

WOW!!!

I'll check it out!