I think they used a "clean" drink to normalize their values. I don't see a reasonable path to real-world use. As they drily point out - "As with all colorimetric methods, the natural color of some beverages would prove to be a challenge".
I guess that can be somewhat calibrated based on the rest of the image, but it seems to be basically impossible to know what color a "clean" cocktail should be.
Comments
1. There is not only GBH, in our lands clopfelin is much more common for that goal.
2. Color analysis? Good luck on doing that. I really surprised it worked at least in lab conditions.
I think they used a "clean" drink to normalize their values. I don't see a reasonable path to real-world use. As they drily point out - "As with all colorimetric methods, the natural color of some beverages would prove to be a challenge".
Not to mention the varying light conditions in different venues and variations in smartphone cameras, this seems impossible
I guess that can be somewhat calibrated based on the rest of the image, but it seems to be basically impossible to know what color a "clean" cocktail should be.