Background
Field drug-testing kits currently in use rely on visual interpretation of a colour-change reaction. This makes results subjective, difficult to standardise across officers, and leaves no verifiable record that a test was actually conducted at a given place and time. As a result, field test outcomes cannot presently be relied upon as documentary evidence.
Description
Participants are to build a mobile application that works alongside existing colorimetric field-test kits (no new hardware).
The application should
Capture an image of the test result using the device camera, using a reference colour card in-frame for lighting calibration.
Automatically classify the result against a defined set of outcome categories (e.g., positive, negative, inconclusive).
Generate a tamper-evident digital record of the test, capturing timestamp, GPS location, and an operator identifier, together with a cryptographic hash of the captured image.
Maintain a simple, searchable log of tests conducted.
Expected Deliverables
A working mobile/web application prototype demonstrating image capture, automated result classification, and generation of a signed digital record.
Note to Participants
The output of this application is a presumptive field-test result and a supporting digital record; it does not replace laboratory confirmatory testing.