School Nail Rules

Next Experiment: Real Measurement

Right now AI is making a visual judgement. Later we will add a known-size reference beside the finger, calculate pixels per millimetre, locate the fingertip and nail edges, and compare a calibrated free-edge measurement with the school rule.

IMAGE → REFERENCE SCALE → PIXELS PER MM → FINGERTIP EDGE → NAIL EDGE → FREE EDGE PIXELS → MILLIMETRES → COMPARE WITH SCHOOL RULE

Gemini Vision Experiments

API mode: Interactions
Model: gemini-3.6-flash
Gemini configured: Yes
Connection: Not tested
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Developer vision image:

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Developer / Parent View

Development mode: analysis images are currently being stored on this server for detector improvement. Oldest attempts are automatically removed after 300 records.

Student STEM Lab · Experimental Detectors / Full Hand Detector · Teacher / Presentation Mode · Export Training Dataset

Why doesn't Student Mode automatically find the nail?

Student Mode is collecting the examples that will teach a future AI what a nail looks like. The student's marking is the correct answer, called ground truth.

Ground Truth: The correct answer provided by a person for an AI training example.

20260903_080607_ce165efe88b0

Reprocess Original ROI with OpenCV Detector — creates a new linked attempt and preserves this record.

Detector Summary

Attempt ID: 20260903_080607_ce165efe88b0

Detector version: 1.2.0-opencv

Result: Low confidence - retry

Overall confidence: 44

Processing time: 178.8 ms

Finger orientation: -2.4464784119973°

Fingertip confidence: 100

Nail-search dimensions: {"x":64,"y":93,"width":185,"height":86}

Candidates: 2

Best candidate: 83.418760135711

Second candidate: 58.952061866204

Score margin: 24.466698269507

Representation agreement: 25

Ensemble agreement: 66.666666666667

Final nail confidence: 44

Visual Detection Pipeline

Click an image for full-size inspection. Missing stages remain visible so detector versions can be compared.