For the past year or so i have had to answer different questions on how the intensity response of a monitor behaves, nearly every week. Many of you probably know that the monitor intensity response to RGB values is nonlinear. Even if you didn't you can quite quickly verify so from reputable sources.
However, there is a small subset of people, who get completely stuck with the concept. Simply because they need to accept the nonlinearity as a fact by faith alone. So I have been thinking about ways to experimentally prove this, with help of things that can be found in most households.
The experiment that I've come up with is as follows:
- Take a piece of paper and fold it so that you have one side where you have paper layered 2 times and one side where you have the paper non layered.
- Place this paper against a monitor with on top of 2 color swatches and adjust the color in the other swatch so that its intensity is visually the same as the one that need to pass 2 layers of paper.
- Repeat for a few values plot the results on a graph paper and so on.
Ok, so I'm aware that the paper folded is not entirely linear either as theres 2 times more surface interfaces, and so on. But I can eliminate that nonlinearity by a additional experiment where I keep the monitor value constant and place different folds on top if O must. I'm just hoping it is sufficiently linear to prove my point without this step.
Now since I am on a vacation I have no calibrated screen or a colorimeter with me. So, I would like your input on this experimental setup, before I drop the idea onto the infinite list of things to do that i probably wont have time to resume later.
If you can come up with a better setup id be happy to hear it.
PS: I am aware that i can use a halftoned/pulsed color swatch to compare against but this has some drawbacks for certain viewers and is not so cool.