I have 4 frames from an historical source showing an animation of a statistical algorithm (multidimensional scaling), ca. 1962. They were captured by a film recorder connected to a CRT display. A movie version can be found at http://stat-graphics.org/movies/multidimensional-scaling.html
I want to publish these in a book on the history of data visualization, and wonder if there is some way I can enhance them digitally to make the patterns of points on the black background more visible. What is important to see is how the configuration of points changes from frame to frame.
Are there any tools I could use to make this better?
Here is the figure, composed from the 4 separate frames.