Digital Companion for Field Drug Testing

The receipts 🧾

Every red flag on this statement, in full. These are the four places it bites.

1. Exhibit A

   Colour classification must be genuinely robust across lighting, kit brands and camera sensors, and the reference card is what makes that work — skip it and the results are as subjective as the eye

2. It gets worse

   The tamper-evidence must be real — a hash and signature that can be regenerated after the fact is not tamper-evident, so the crypto design matters

3. Still reading?

   Different kits use different colour scales, so a classifier tied to one kit will not generalise without care

4. And the finisher

   It is a modest build, so polish, robustness and the evidentiary rigour are what distinguish it rather than ambition

The damage report 📉

Every score this statement earned, and what each one actually costs you.

• Feasibility

  4/5

  Actually buildable, which on this slate is rarer than it sounds. Do not squander it on scope.

  This is very buildable — reference-card colour correction, colour classification and hash-plus-metadata record generation are all standard, need no special hardware, and the reference-card-in-frame approach is a genuinely sound way to make the colour reading robust to lighting.

• Innovation scope

  3/5

  Mildly interesting. The novelty will not carry the room; the build has to.

  The components are individually standard, so the room is in making the colour classification genuinely lighting-robust and the record genuinely tamper-evident, rather than in novel technology — but the standardisation-and-evidence framing is a real, useful contribution.

• Clarity

  5/5

  The ask is unambiguous, which quietly removes your favourite excuse.

  The requirement is precise and well-bounded: reference-card calibration, defined outcome categories, the exact tamper-evident record fields, a searchable log, no new hardware, and an explicit note that the output is presumptive, not confirmatory.

• Acceptance potential

  4/5

  Strong footing before you have written a line. Try not to waste it.

  A strong, achievable pick — it needs no new hardware, the reference-card calibration is a sound answer to the real subjectivity problem, the tamper-evident record directly addresses the evidentiary gap the description names, and it is honestly scoped as presumptive, so a clean build genuinely solves the stated problem rather than over-reaching.

• Effort

  Medium

  Manageable — which means the bar for polish just went up, because you have no excuse left.

  A camera-capture app with colour correction, classification, signed records and a log is a contained, well-bounded build using standard components.

• Demo-ability

  Easy

  Easy to demo — and so is everyone else's. Working is the floor here, not the achievement.

  Photographing a test, watching it classify consistently under bad lighting where the eye is unsure, and generating a signed time-and-place record is a clean, concrete, self-explanatory demo you can construct exactly.

• Data

  None supplied

  No dataset comes with this one, so every accuracy figure you quote is a number about labels you invented.

  Nothing is provided with the statement. You are sourcing, cleaning and labelling it yourself, and that work is invisible in the demo but very visible in the questions.

The demo they will have already seen 🪞

Somewhere around 210–480 teams are heading here, and the description is doing the choosing for most of them. They will read the same brief, reach the same architecture, and build a version of the same demo you are planning. Being correct is the floor. If your five minutes could be swapped with the team before you and nobody in the room would notice, you have not picked badly — you have built predictably, which costs exactly the same and hurts more.

What survives 🛡️

The ground worth standing on when the questions start.

• No new hardware is required, so the whole thing is a software build on existing kits, which keeps it comfortably in scope
• The reference-card-in-frame approach is a genuinely sound method for lighting-robust colour reading and can be validated with printed standards
• The tamper-evident time-and-place record directly solves the evidentiary gap the description identifies