ウェブカメラ 照明テスト
カメラ映像の明るさを確認し、暗さ・白飛びを改善するための手がかりを得られます。
Webcam Lighting Test
Estimate if your video is too dark or too bright.
Share your lighting results
Copy/download a report to troubleshoot camera quality with IT/support.
How to use this test
- • Start the test and look into the camera for a few seconds.
- • Face a light source; avoid bright windows behind you.
- • If your face looks dark, increase front light or lower background brightness.
Estimated brightness
Start the test and look into the camera for a few seconds.
Tip: face a light source. If there’s a bright window behind you, your face may look dark even if the room is bright.
このテストの仕組み
We preview your webcam using getUserMedia and sample frames in a hidden canvas to estimate average brightness. Everything runs locally.
- • No frames are uploaded or stored.
- • We compute a simple brightness estimate to guide quick adjustments.
トラブルシューティング
- • If the camera is blocked, click the lock icon and allow Camera, then reload.
- • Close other apps using the camera (Zoom, Teams, Meet, OBS) and retry.
- • On mobile, keep the tab active so the camera stream stays running.
Quick steps
- • Click Start Test and allow camera access.
- • Look at the preview and check the brightness reading.
- • Add a front-facing light if you are too dark.
- • Reduce backlight or lower exposure if you are washed out.
Fast fixes for better lighting
- • Face a window or lamp; avoid windows behind you.
- • Raise your monitor or laptop so the camera is closer to eye level.
- • Use a soft light (diffuse) instead of harsh overhead lighting.
- • Clean the camera lens if the image looks hazy.
When to use this test
- • Before interviews and meetings to avoid dark or washed-out video.
- • After changing rooms, desks, or lighting conditions.
- • When your camera looks grainy due to low light.
Safety and privacy
- • Video is processed locally; nothing is uploaded.
- • Stop the test to release the camera when finished.
関連ツール
よくある質問
How accurate is the brightness score?
It’s an estimate based on the camera preview. Exposure and auto-brightness vary by device, but it’s useful for quick setup checks.
Why do I look dark with a bright window behind me?
Backlighting makes cameras lower exposure, darkening your face. Face a light source and avoid bright windows behind you.
Do you upload video?
No. Video stays in your browser and is not uploaded.
What lighting is best for video calls?
A soft light in front of you at eye level (like a lamp or ring light) usually looks best. Avoid harsh overhead light and strong backlight.