This page is in the experimental stage. It takes a colour photo, runs it through two filters of different colours, the results of which it converts to greyscale. Then ‘re-projects’ that greyscale image through the two colour filters to obtain a full colour additive mix. It kind of works, and it will work much better the more I hone the colour brightness formulas and filters. A complex topic that I’m in the process of writing up. The experiment is inspired by Experiments in Colour Vision by Edwin Land from 1959 (Land’s paper here). Land was not the first to demonstrate the effect of creating coloured images from black-and-white film taken through filters, for example see some of the colour films made by Claude Friese-Greene in the 1920s, on YouTube. Friese-Greene used the Biocolour process, there was also Kinecolour and early Technicolor, all red and green filters to full colour from black and white film.

You need to scroll down the page to see the progress of the experiment, or collape the sections to see parts at a time.