The images in older content can often be updated with new technology. Should this be done, or is it better to leave well enough alone?

On the Home Theater Geeks podcast last week , I discussed the process of restoring the 1928 silent film The Passion of Joan of Arc with Kevin Manbeck, CTO of MTI Film, which developed the software used in the restoration. Digitally repairing damage such as visible splices and tears was the main goal—and it was highly successful—but we also talked about correcting anachronisms, such as removing the 20th-century glasses that an actor was wearing in one shot, as seen in the still image above. The restoration team decided not to remove those glasses, since the director, Carl Dreyer, had been so meticulous with all other details that he must have been okay with the glasses appearing in his film.

A more recent example is the reissue of the original Star Trek TV series on  Blu-ray . In that  case , the outer-space shots of planets and ships as well as other visual elements were replaced with computer-generated images that look far better than what was possible in the 1960s. You can select whether you want to view the shows with the original effects or the new CGI.

Do you believe that such updates should be undertaken when restoring older content? Or should restoration only repair damage and improve overall image quality to whatever extent is possible?