diceroller

A fully autonomus dice-roller for determining if a dice is "fair"

The end

I've spent way too much time on this project, and I no longer believe it serves its purpose, but is a time-waste for me. There is many problems, of which most could be solved easily, but im quite unvilling to at the moment. The major issues are listed below:

Issues

• The stepper reset routine is not consistent, resulting in inconsistent lighting(which causes further problems)
• the tresholding alg is simple but doesnt work for certain dice and is incredibly sensitive to lighing
• the current models(found in this Github Repo) are imperfect, due to trashy data(caused by issues above)
• while workable, the code itself is mostly slop.
• collecting data/training for other dice types is a huge pain.

Status

The results:

The Cool gifs:

The machine:

Project goals

There is 2 distrinct subsystems, the "mechanisim" and the "software", the former is the physical part and the motor controls while the latter is the image-detection pipeline

Must

• the mechanisim must be able to able to roll all standard dice(4,6,8,10/100,12,20) in a way that's similar to how a human would.
• the software must read the dice and record the results(all except D4's)

Should

• The mechanisim should be able to accomodate larger than standard dice
• The mechanisim should be able to roll multiple dice at once
• The mechanisim shouldn't rely on too many actuators less than 2 motors is optimal
• The mechanisim should be mostly custom-made
• The software should support both dice with dots and numerals
• Should also include lights etc. for usage in all env's
• Make the system double-sided for measuring both sides
• add ridges/slopes to the inside to increase entropty or something
• The software should support rolling D4's
• The software should auto-detect the amount of dice rolled and record accordingly

Could

• The software could detect dice size, or maybe it doesnt need to know it at all?
• The dots-vs-numbers could be automatic?
• Could include a magazine and load the dice one set at a time for overnight tests?
• Could Detect multiple dice with different colours and record them independtly?
• Could use a RP-zero-2-w as the processor?

Won't

• No custom electronics
• No display/GUI past running scripts

Hardware

Hardware used:

• Raspberry Pi Camera Module 2
• Raspberry Pi Zero 2 W
  • Has a camera port, thats basically the requirement
  • Kinda slow but we'll probably run at ~0.5 fps either way.
  • € 20
• any arduino board
• easydriver stepper
• LED strip + relay

CAD

• The cad is hosted on onshape, Public Link. If you'd like to contribute, let me know!

Software

• Model Training has been done for D6 and D6 with pips, the architecture is there for the rest but i dont have the data yet

Acknowledgements

This project takes heavy inspiration from the following projects:

• Automated Dice Tester by punkUser
  • whitepaper
  • Git repo
• Entropy Dice by Bitroller
• Dice Tower by BurksBuilds
  • Git repo