====== A primer to trichromatic photography ======

Or, the art of taking pics of monochrome devices in color

===== step 1: edit an existing pic to put on your device =====

We'll take this picture:

{{ 0:logo.png }}

In your editing software, you should be able to decompose it in its different channels:

<WRAP group>
<WRAP third column>{{ 0:logo-r.png }}</WRAP>
<WRAP third column>{{ 0:logo-g.png }}</WRAP>
<WRAP third column>{{ 0:logo-b.png }}</WRAP>
</WRAP>

GIMP: Colors > Components > [[https://docs.gimp.org/3.0/en/plug-in-decompose.html|Decompose...]]

Imagemagick: ''magick logo.png -separate logo_%d.png''

===== step 2: put it on a device and take a pic =====

Take either some old non-Color Game Boy, a monochrome TI-83, or a e-ink device and find a way to write a ROM, a program, or import each of these three pics on that device.

Then, you'll want to take three pictures of that device showing each of the three channels you got in the last step. Important: Make sure the device nor the camera move! You might want to use a tripod. You can use a red/green/blue filter on each of them, but that's not particularly needed since we're doing this in software later.

<WRAP group>
<WRAP third column>{{ 0:rick_r.jpg }}</WRAP>
<WRAP third column>{{ 0:rick_g.jpg }}</WRAP>
<WRAP third column>{{ 0:rick_b.jpg }}</WRAP>
</WRAP>

===== step 3: post-processing =====

Now import the three pictures as layers and recompose them back!