Projector Camera Analyzer — Live RGB & Uniformity

Free in-browser projector image analyzer that uses your phone camera as a basic colorimeter. Captures live video of the projected image, computes RGB histograms, white-balance ratio (R:G:B), 9-zone luma uniformity score, and white-clipping percentage. No app install — pure WebRTC + canvas. Great for quick uniformity checks, post-calibration verification, and spotting clipping before serious calibration with a real colorimeter.

How to use

1
Project a white field

Open Projector Test Patterns → White (or any solid bright field). The analyzer needs a known reference.

2
Start the camera

Allow back-camera access. Hold phone steady, fill the frame with the projection.

3
Read the metrics

Brightness around 180–230. White balance neutral (R≈G≈B). Uniformity ≥88%. Clipping <1%.

4
Iterate

Adjust projector brightness/colour, re-check. Use this as feedback during manual calibration.

Use your phone camera as a poor-man's colorimeter

Brightness
—
White balance
—
Uniformity (9-zone)
—
Clipping (white)
—
Live RGB histogram (R/G/B)
Project a solid white field (use Projector Test Patterns → White) and point your phone's back camera at the centre. The tool samples each frame and reports brightness, white balance shift, 9-zone uniformity (visible hot spots / vignetting), and clipping percentage. Calibration is approximate — use as a relative indicator, not absolute measurement.

Features

Live RGB histogram White balance ratio 9-zone uniformity Clipping detection
Who is this tool for?
📽️ Projector Owners

FAQ

How accurate is this vs a real colorimeter?

Phone cameras have white-balance auto-correction and colour-science quirks. Absolute accuracy is ±10%, but RELATIVE accuracy (comparing two states with the same phone) is much better — within ±2%. Useful as feedback loop during calibration, not a replacement for an X-Rite/Datacolor.

Why does white balance fluctuate?

Most phone cameras auto-adjust WB. Try locking WB in your phone's pro/manual mode if available, or use this tool only for relative comparisons within the same session.

Will it work in a dim room?

Yes — the projection is bright enough. Don't use it in pitch black if the camera tries to "rescue" with high ISO; turn on a bias light at minimum.

💡 Want us to improve this tool just for you?

We can — and it's free! Just send us a quick message with your idea. If you'd like to discuss it in detail, leave your email and we'll get back to you. You can stay anonymous.

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