MonTagger

Named for the protagonist of Fahrenheit 451 and French for "my tagger," MonTagger along with an OpenFrameworks Application provide a means for tracking a pen or can through CV(computer vision). To solve the problem of occlusion to the camera, the device emits 2 laser lines which intersect at the point of contact for a pen or spray can. This means that the camera simply needs to see 2 line segments to then compute where they intersect, resulting in where the pen or can is actively being used. The device only requires:

1. 2x lasers (red, green, IR...)
2. 3x AAA batteries (anything that can provide ~2.7-3.5v)
3. a push button (switch)
4. 3D printed case to attach the above to writing instrument
   (Note: I would love to see a hack for laser cut parts instead, it is so much faster and accessible to recreate)

Formlabs

Form 1

Doesn't Matter

Yes

0.05mm

Printed on the Form 2 printer with wonderful results. Note: Try and keep the supports off of the threads.

MonTagger relies on some OpenCV detection to calculate where the drawing is occurring. More information will be posted soon about this on Github, here: https://github.com/jbobrow/MonTagger