by jeclark2006 » Mon May 07, 2012 10:12 am
The specifics of 'solaration' when one is talking about old, like really old film materials, was due to the overexposure of the negative, to the point where rather than increasing density, density is reduced.
The technique used by Man Ray in the 30's involved exposing the print during processing to light, to induce the effect. I would imagine that the process for movie film would be similar to 'preflashing' the film, but during the processing... I only did this for a couple of still photo class exercises, as it is not 'my kind of technique'...
For digital images, one can get the dark outlines by a process of converting to B&W, then using a 'find edges' filter and adjusting the contrast to yield a 'high constrast' image, giving the image a 'lith' look, then layer that image on top of the continuous tone B&W, and everything being in registration, use the 'multply' mode on the high contrast layer, to cause the dark outlines to be seen, and because the non-edge area of the high contrast image is 'white' the multiply operation will allow the continuous tone image to be seen.
One can also apply a filter to the continuous tone image, to get the washed out effect, as desire.
This can be done for color images as well, but I'd tend to have the edge image a B&W high contrast image, and then the edges will be 'black' rather than some sort of rainbow color...
Additional filter on the continuous tone image such as Gaussian Blur would eliminate detail, and give sort of a surreal 'smooth' look.
Experimentation is in order...