Camera Test — Complete Webcam Diagnostic

Yes. The Capture tab has "Take Photo" and "Record Video" buttons, and the "Record with sound" switch adds a microphone track. Clips are saved as WebM. For a long take, MP4 export, a countdown and a teleprompter, use the dedicated Webcam Video Recorder tool.

The tool measures resolution, frame rate (FPS), image sharpness using Laplacian variance, noise levels with signal-to-noise ratio, brightness, color temperature, and exposure distribution. It also detects supported video codecs and maximum capabilities of your camera.

How much fine detail sits in the frame, computed as the variance of a Laplacian — a filter that responds to edges and ignores flat areas. A picture full of crisp boundaries scores high, a blurred one scores low, and that makes it a good instrument for one job and a poor one for another. It compares the same scene before and after a change: wipe the lens, refocus, turn off a beauty filter, and watch the number move. It does not compare two different scenes, because a bookshelf will beat a blank wall on any camera. If the figure is low on a detailed scene, look at the lens first — a fingerprint costs more sharpness than most people expect.

The histogram shows the distribution of pixel brightness values in real-time. A well-exposed image has a spread across the full range. Peaks on the left indicate underexposure, peaks on the right indicate overexposure. The RGB channels help identify color casts.

Low sharpness can be caused by: out-of-focus lens, dirty lens, low resolution, heavy compression, or poor lighting. Clean your camera lens, ensure good lighting, and focus on a detailed object to get the best sharpness score.

Yes. Use the camera selector dropdown to switch between available cameras (built-in webcam, external USB camera, etc.). Each camera is tested independently with its own metrics.