Glorious Technicolor Process 4 - 3 Strip - Aviator Version_v2 by mihnelis

Glorious Technicolor Process 4 - 3 Strip - Aviator Version_v2 by mihnelis
http://www.filterforge.com/filters/12465.html

Hello SpaceRay. Unfortunately I did this filter using the trial version of FilterForge. I do not own it anymore and as much as I love it, I can't afford it presently. Back when I did this I was looking online to find a solution for generating the channel mattes required for this effect and Filter Forge was by far the best solution. I also did this filter as a Photoshop action, but it is much more cumbersome and no controls over the process.
Here is the video of what this filter does:
YouTube
I recreated all the steps seen in the video and read as much as I could about the film and the Tehnicolor process. Download the filter and apply it to an image and you will see more clear results. Thanks.

The short answer is yes. The long answer is that is a very close mathematical approximation, much better than the LUT provided in Color Lookup in Photoshop.

The original three-strip required a huge camera which split the light spectrum in three parts using two prisms and exposing three black and white films through a R, G and B corresponding filter. The resulting negatives were tinted in the complementary hue- CMY and heat-transferred on a clear celluloid film strip. It was a very expensive and cumbersome process and all the steps even though they were extremely accurate, would introduce some idiosyncrasies in the final film.

That is mostly due to the tint of the dyes and the filters used in the cameras and also calibrating the white point, witch was no easy task back then. Digitally there is no direct correspondence with the original process except the mathematical interpretation of it.

A filter like this is very useful when trying to achieve that particular look because is fast and provides a very nice result without the need to manually tone and CC every image manually. However, what most people don't realize is that the 3 strip process was pure in the sense that there was no overlap in the color spectrum. By extracting the mats with Filter Forge, it gives you very nice clean color channels and that is what I mean by mathematical approximation.