Webcam Lighting & Framing Analyzer

Three diagnostics — lighting balance, face framing, and resolution. All analysis runs locally. No frames uploaded.

ZERO UPLOAD · ALL LOCAL

What to look for

  • Lux needed for 30fps 200 to 400 lux
  • f/1.7 vs f/2.0 light gain about 40% more light

What to look for

  • Daylight ring-light temperature 5500 to 6500K
  • Warm-white ring-light temperature 2700 to 3200K

What to look for

  • Target balance score below 15%
  • Score update rate every 250 ms

What this page covers

  • Clip-on ring light sits close to the camera axis, minimizing shadows on the side of the face opposite the light
  • Desk-level LED panel placed near face height, slightly in front of the laptop, for more control over brightness and angle
  • Vendor light correction e.g. Logitech RightLight helps but cannot create balanced light from every direction on its own
  • Window positioning a window in front of you helps; a window behind you works against the lighting balance score

What to look for

  • Overhead-lighting color temperature 4000K
  • Ideal fill-light height range within 15 cm of eye level

What to look for

  • Typical app segmentation cap 720p or 1080p

What to look for

  • Recommended ring diameter 12"-18" for most desk setups
  • Target working distance 50-70 cm from the face
  • Balance score target below 10% once the lens is centered in the ring
  • Common color temperature mismatch warm overhead light (2700-3000K) vs daylight-balanced rings (5600K)

A GOOD balance score does not by itself mean optimal lighting quality; a ring placed too close (around 20 cm) can overexpose highlights while still reading GOOD.

What to look for

  • Best mount position top of the primary monitor, centered on its width
  • Target headroom range 10-20% of frame height
  • Face-center offset when mounted correctly close to zero

A camera placed in the gap between two monitors is rarely at eye level and creates a repeated side-glance pattern as your eyes shift between screens.

What to look for

  • GOOD threshold below 15%
  • WARN range 15% to 35%
  • BAD threshold above 35%

What to look for

  • Eye-line position from top about 33%
  • Ideal headroom 10% to 20%

What to look for

  • Narrow FOV (e.g. Logitech C270) 60 degrees
  • Mid-range default (e.g. Logitech C920) 78 degrees
  • Wide FOV (e.g. Logitech BRIO 4K Pro) 90 degrees
  • Typical desk working distance 50-80 cm

Doubling camera distance roughly halves face width in the frame, letting you trade distance against FOV to reach the same framing.

Camera access is required to run any diagnostic. Access is used only for local analysis — no frames are recorded or transmitted.

Camera active — select a diagnostic below
Diagnostic Modes
LEFT LIGHTING BALANCE RIGHT
L R
LEFT avg — RIGHT avg —
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Top
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Bottom
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Left
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Right
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Preview

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Resolution —
FPS —
Aspect Ratio —
  1. Click "Enable Camera" and allow access in the browser prompt — no frames are recorded or uploaded.
  2. Select "Lighting Check" to see the live balance score. Below 15% is GOOD; above 35% is BAD. Adjust your lighting setup and watch the score update in real time.
  3. Select "Framing Guide" to see face detection overlays. Position yourself so the distance verdict reads "Good" and your face is horizontally centered.
  4. Align your eyes to the upper third guide line for standard video-call framing (rule of thirds).
  5. Select "Resolution & FPS" to read the actual resolution and frame rate your camera is currently delivering to the browser.
Updated:  ·  Published:  ·  21 min read

Reading the lighting balance score

The Lighting Check measures the average luminance in the left and right halves of your frame every 250 ms using the ITU-R BT.601 luma formula (0.299R + 0.587G + 0.114B) on a downscaled 160×90 copy of your video frame.12 The balance percentage is the absolute difference between the two sides divided by the brighter side, expressed as a percentage so you can compare results across different lighting setups.

A score below 15% is rated GOOD: both sides of your face receive approximately equal illumination, which appears natural and professional on video calls. Scores between 15% and 35% earn a WARN rating; at this level, shadowing on one side will be visually noticeable. Above 35% is BAD, and you can expect heavy one-sided shadow that makes video calls look unprofessional.

The balance score is intentionally a relative comparison rather than an absolute luminance reading, because what matters for video-call appearance is the symmetry of the lighting, not how bright the room is overall. A dimly lit room with even left-right balance reads as GOOD, while a brightly lit room with a window off to one side can read as BAD even though there is plenty of light on the subject.

TIP The most common cause of poor lighting balance is a window directly to one side. Either close the blind or position a secondary lamp on the dark side to act as fill light, and a white sheet of paper placed just out of frame works as a cheap reflector that softens one-sided shadow without introducing harsh secondary highlights.3

Understanding face framing and the distance verdicts

The Framing Guide uses MediaPipe's Face Landmarker model (478 3D facial landmarks) to locate your face in each video frame, and the bounding box, eye midpoint, and face centre are computed from the landmark coordinates and rendered on a canvas overlay that sits on top of the live video so you can see exactly how the model interprets your position.4

The distance verdict is based on the width of your face relative to the frame width. A face narrower than 15% of frame width is flagged Too Far; wider than 55% is Too Close. The centre verdict triggers when your face centre deviates more than 25% of the frame width from the horizontal midpoint, and you can nudge yourself back into frame by watching the overlay rather than guessing. In practice, aim for a face width somewhere between 25% and 40% of the frame width so your face is prominent without being overwhelming, which produces a balanced, professional look that works well for video calls, streaming, and recorded presentations.

Field of view explains some distance verdicts that posture cannot. Face width here is measured as a percentage of the frame, and the same physical seating distance produces a smaller percentage on a wide-angle webcam than on a narrow one, because the wide lens fits more of the room into the same pixels. Sometimes a Too Far verdict means something other than distance: either you genuinely sit far back, or your webcam simply has a wide field of view and your call platform may be cropping the picture anyway. Before dragging your desk closer, change one thing at a time and watch how the verdict responds; the geometry that feels cramped on your monitor may look perfectly normal on the other side of the call.

Putting your eyes on the upper third

The overlay draws a rule-of-thirds grid, and on a video call the line that matters is the upper horizontal one. Eyes sitting on or just below that line with a hand's width of space above the head read as deliberate framing, while a face dropped into the exact middle of the frame leaves a heavy band of ceiling and forehead above it.5 Camera height does most of this work. A webcam perched on a tall monitor or a laptop lid aims slightly downward, which pushes the eyes low and the forehead forward, so the fix is often a lower camera rather than a new chair position.

Start with the eye line and adjust comfort around it. Once your eyes land in the right place, bring chair height and screen height together until your neck sits neutral, then find the seating distance that keeps face width in the 25 to 40 percent band. Marking that spot with a piece of tape is worth the ten seconds, because the distance is the part that drifts from one session to the next.

Framing problems the overlay catches

Too close is the most common laptop framing fault, and it is a lens problem rather than a composition one: a face filling the frame from a wide-angle camera exaggerates the nose and any other feature nearest the lens. Pulling back fixes both the perspective and the Too Close verdict at once. Too far is the opposite failure, usually caused by a camera sitting high on a monitor arm or a wide desk, which shrinks your face into a large background and makes you harder to read on a phone screen.

Horizontal offset is the fault the overlay is best at catching, because it is almost invisible in a mirror and obvious in a preview: a camera clamped to the side of an ultrawide display leaves your face off centre, and the background crowds one edge. Move the camera before reaching for a digital crop, since a crop spends resolution to hide a problem that a webcam reposition solves for free. Check the frame edges as well as the face, because a monitor edge cutting through a shoulder or a doorway behind one side is the kind of context a face bounding box cannot report.

A good video call frame looks intentional before anyone hears the first word. Strong framing borrows from composition rules used in photography and video interviews. The rule of thirds places important elements along grid lines or intersections rather than the geometric centre, while a small amount of headroom keeps the face readable without wasting the top of the frame.12 For calls, the camera should sit near eye level and keep your face centred in the frame so your presentation looks intentional instead of accidental.3

This tool shows your framing in real time using MediaPipe face detection overlays.4 The rule-of-thirds grid, headroom guide, and face width measurement let you dial in professional framing without guesswork. Correcting framing takes seconds, costs nothing, and can improve how you present more than a camera upgrade.

The rule of thirds and why it applies to video calls

The rule of thirds divides the frame into a 3×3 grid by drawing two equally spaced horizontal and two equally spaced vertical lines across the image. In composition, key elements such as a subject, horizon line, or face can sit on the grid lines or intersections instead of landing at the geometric centre, which creates a more dynamic and visually engaging frame than centre placement. That placement gives the frame balance without making it feel static.1

For video calls, the most useful line is usually the upper horizontal third. Your eyes should sit on or just below this line, with a small amount of headroom above the top of your head. Adorama's interview framing guide treats eye-level camera placement, rule-of-thirds positioning, and small headroom as a connected setup rather than separate decoration choices.2

The framing guide in this tool draws both the rule-of-thirds grid and the headroom marker, so you can verify both at the same time in the live camera preview. This real-time feedback lets you adjust your position before the call starts rather than discovering framing problems after you have already joined the meeting.

Set eyes before you adjust the chair

Start with the upper-third line, not with general comfort. Once your eyes sit on or just below the line, adjust chair height and monitor height together until your neck feels neutral. That keeps the frame professional without forcing you into an uncomfortable posture for the entire call. Getting this right before the meeting starts means you can focus on the conversation instead of fidgeting with your setup, and viewers subconsciously register a well-framed shot as more credible and professional.

If your monitor and camera are fixed in position, you can still fine-tune the framing by adjusting your seating distance. Sitting closer raises your face in the frame; sitting farther back lowers it. Use the live preview in this tool to find the distance where your eyes hit the upper-third line and your headroom looks natural, then lock your chair position for the session. A small piece of tape on the floor or desk edge marks the spot so you can return to it quickly if you need to step away.

Common framing mistakes and how the tool diagnoses them

A close camera position can create an unflattering framing error on laptop webcams. When your face is near the lens, a wide-angle camera can exaggerate perspective and make the nose or foreground features look larger. Pull back until your face has enough room in the frame, then check the preview before the call starts.5

Too far is the opposite problem. If the camera sits high on a monitor stand or far back on a wide desk, your face can become a small element in a large background. Move the camera closer, sit closer to the display, or use the framing overlay to choose a better working distance.

Off-centre framing often happens when the camera sits on a secondary monitor or near one edge of a wide monitor. Microsoft recommends positioning your webcam at eye level so you are centred in the frame, which is why the tool flags horizontal face-centre offset as well as camera height.3

Check the background for framing context

Shoulder-cropping framing errors on wide monitors often hide behind a centred face reading, since the overlay tracks head position, not whether the monitor edge cuts through your shoulder or a doorway crowds one side. Small physical changes usually solve these problems more cleanly than digital zoom, because they preserve resolution while improving the visual context around the subject. Look past the face overlay itself and check what sits at the frame edges before finalising the setup.

Fix the cause, not the final crop

If the tool shows your face shifted left or right, move the camera or yourself before relying on software framing. A digital crop can hide the offset, but it also reduces resolution and may move the eyes away from the upper-third line. The most stable result comes from aligning the physical camera with your seating position first, then using the overlay only to confirm the final call frame.

Use this guide when setting up a new webcam position for the first time, when transitioning from a laptop webcam to a dedicated USB webcam, when preparing for a high-stakes video call where appearance matters, or when adjusting framing after a monitor height or desk configuration change.

Laptop webcam positioned close to the user; face fills most of the frame

Before 
Nose appears large because the face is too close to the wide-angle lens; framing verdict: TOO CLOSE
After 
Moving the laptop farther back gives the face more breathing room; verdict changes to GOOD

Laptop users often position themselves closer than ideal because they are reading content on screen. Check framing separately from reading distance.

Dedicated webcam placed high on an ultra-wide monitor

Before 
Camera looks downward; top of head is prominent; framing appears unbalanced
After 
Adding a monitor arm to bring the webcam to eye level resolves the downward angle; eyes align near the upper-third line

Camera height is as important as horizontal centring for professional framing.

Sources for this section
  1. 1.

    Adorama, "Rule of Thirds in Photography: What You Need to Know," adorama.com, November 2022. https://www.adorama.com/alc/faq-what-is-the-rule-of-thirds/

  2. 2.

    Adorama, "Capture Perfect Interviews: The Ultimate Guide," adorama.com, May 2024. https://www.adorama.com/alc/capture-perfect-interviews-the-ultimate-guide/

  3. 3.

    Microsoft, "Tips for presenting in large meetings and events in Microsoft Teams," support.microsoft.com, accessed June 2026. https://support.microsoft.com/en-us/teams/meetings/tips-for-presenting-in-large-meetings-and-events-in-microsoft-teams

  4. 4.

    Google AI Edge, "MediaPipe Face Detection," github.com, accessed June 2026. https://github.com/google-ai-edge/mediapipe/blob/master/docs/solutions/face_detection.md

  5. 5.

    B&H eXplora, "Perspective Distortion in Photographic Composition," bhphotovideo.com, accessed June 2026. https://www.bhphotovideo.com/explora/photography/tips-and-solutions/perspective-distortion-in-photographic-composition

FAQ

The upper third aligns with where viewers expect the most expressive part of a face, the eye area, to sit in conversational framing. Centre placement makes the frame feel low and the forehead heavy. The upper third is a composition convention used across photography and interview video.

Adjust your seating distance and height. CapyToolkit shows the face-to-frame ratio and eye line as you move, so you can make small changes without guessing. Moving your chair further back reduces the face-to-frame ratio. Using a chair height adjustment brings eyes closer to the upper third. A monitor arm can raise or lower the camera without changing your seating position.

Partly. Tighter framing reduces how much background is visible, limiting how much the clutter distracts. A virtual background or physical backdrop eliminates the problem completely. Framing and background are independent variables that can each be improved separately.

Looking at the camera creates eye contact from the other person's perspective. Looking at the screen shows you looking slightly downward. For important calls, looking at the camera during your speaking turns improves perceived eye contact. That is a behavioral adjustment, not a framing one.

No. The rule of thirds and headroom principles apply to any rectangular frame. At 4:3 or 9:16, the same framing principles apply, but the reference grid changes proportionally.

Headroom and the rule of thirds

Viewers judge framing within the first second of a call, before you have said anything worth judging on its merits. A head position that is too low, too high, or too far off-center reads as carelessness at a distance, and it keeps reading that way all call long. What headroom mistakes cost, exactly, is polish: they are visible to everyone on the other end, they are free to fix, and most people never think to check them until a recording looks wrong. The section below pins down the target range, shows how the tool's overlay marks it on your live video, and ties it to the rule of thirds that portrait and broadcast framing lean on.

Adjusting headroom and centering

Headroom is the gap between the top of your head and the top edge of the frame, and the headroom guide overlay draws a dashed line at 15% from the top to mark the target upper boundary for your forehead region. With your eyes roughly on the upper third line, you follow the portrait rule-of-thirds guideline often used in video shots and professional photography.5

Too much headroom (face positioned low in frame) gives the impression the camera is looking down at you and wastes the most expressive part of the frame. Too little headroom (head cropped at the top) looks unintentionally claustrophobic. The rule-of-thirds grid helps you align your eyes to the upper horizontal third, which is where viewer attention naturally lands first.

NOTE All face detection runs locally in your browser using a WASM binary and model weights loaded from Google's CDN on first use. Nothing is ever sent to CapyToolkit servers, and the model weights are cached by your browser so subsequent visits will load instantly without an additional network request.

Resolution and FPS readout

The resolution and frame rate your camera delivers to the browser are not always the same as the numbers printed on the box. Low light, USB bandwidth limits, and operating system load can all cause a camera to drop below its rated maximum, so reading the live stream settings tells you what you are actually getting rather than what the spec sheet promises.

Webcam test Resolution and FPS readout showing 640 by 480 at 60.0 frames per second with a 4:3 aspect ratio
Resolution & FPS on Chromium's built-in test camera reads 640 × 480 at 60.0 fps, a 4:3 frame.

How the FPS figure is calculated

The Resolution & FPS panel reads live values from your camera's active stream via the MediaStream Track Settings API.6 The FPS figure is computed from a rolling 10-frame timestamp average rather than the nominal reported framerate, so it reflects what the camera is actually delivering to the browser; this may differ from its rated maximum under low-light conditions or when the OS is under load.

Most webcams deliver 30 fps at their native resolution and may drop to a lower frame rate in low light when automatic exposure compensation is active.7 The aspect ratio is derived directly from the pixel dimensions, so a 1920×1080 stream is 16:9 and a 1280×800 stream is 8:5. If you see an unusual ratio, the camera may be delivering a cropped or letterboxed stream rather than its full native sensor area.

The point of reading the live stream is that delivery beats the spec sheet. A 1080p webcam in a dim room that quietly drops to 720p to hold its frame rate is the camera your callers actually see, and the panel reports that honestly even when the box in the drawer promises more. Treat the numbers as the verdict on your current setup: lighting, USB bandwidth, and OS load all pull real resolution down, so a reading below the rated maximum is a diagnosis to act on, not a defect in the tool. Model-specific pages exist for the same check on particular hardware, starting with the Logitech webcam test.

Practical steps to improve your lighting balance score

An unbalanced score responds to physics in real time, which is what makes fixing it genuinely fast. Every lamp you switch on, blind you tilt, or white surface you slide toward the dark side of your face moves the percentage within a second or two, so the Lighting Check doubles as feedback while you rearrange the room. Treat the rest of this section as a set of levers to pull in order of cheapness: start with what you already own, watch the score after each change, and stop as soon as the verdict reads GOOD. The specific fixes follow below.

Correcting an unbalanced score with fill light

A poor balance score almost always comes from a strong light source directly to one side of your face. A window to the left or right is the most common culprit. Closing that blind partially and positioning a desk lamp or ring light on the shadowed side brings light to the darker half and reduces the imbalance. You do not need studio equipment: a white foam board placed on the darker side reflects the window light back onto your face as fill3 and softens the shadowed half.

Three-point lighting produces the most consistently professional result for video calls and recordings. Position a key light in front of you and slightly to one side, a fill light on the opposite side, and a back light behind you to separate your head from the background. Two desk lamps at 45-degree angles in front of you approximate this arrangement without a dedicated lighting kit.8 Watch the balance percentage update in real time as you adjust each light, and aim for a score below 15 percent before your next call or recording session.

Choosing the fix for your light source

Which lever to pull first depends on what is lighting you. A window behind you, a ceiling light above you, a ring light off the lens axis, a fixed laptop camera and a dim evening room each need a different fix, and the webcam lighting fix guide covers all five with the reading to check between each change.

Webcam Lighting & Framing Analyzer Reference

  • Lighting — GOOD Under 15% imbalance
  • Lighting — WARN 15–35% imbalance
  • Lighting — BAD Over 35% imbalance
  • Face width — Too Far Under 15% of frame width
  • Face width — Too Close Over 55% of frame width
  • Face centering Flags past 25% off horizontal midpoint

Run Lighting Check and Framing Guide above and compare your own live readings against this scale.

When the camera will not start

When the camera refuses to start, walk the ladder from browser to operating system to lens, because each layer can veto the next. First, the browser prompt: if you dismissed it or picked the wrong option, this page has no camera to open, and retriggering it usually means clearing the camera permission in the browser's site settings before reloading. Second, the OS privacy layer: Windows and macOS both maintain a per-app camera list under their privacy settings, and a browser that is toggled off there will never see the camera even after you click Enable.910 Third, an exclusive lock: close every video-calling and camera app you have running, because some drivers hand the device to one program at a time.

A black image while the camera light is on is a different fault family. The camera is delivering frames, but they arrive fully dark: the shutter is physically closed or the exposure has collapsed to near nothing. Check the hardware privacy shutter or sliding cover first, since many webcams and laptops ship with one and it is the cheapest possible answer. Then open the Resolution & FPS panel on this page: if frames are arriving, the readout shows live values, and the fault is optical rather than electronic; if nothing reads at all, the feed itself never started, and you are back to the ladder above.

When nothing above helps, suspect the hardware path. The place to look is the operating system's device list, not the browser: if the OS reports no camera at all, cables and ports come first for an external webcam, and laptop kill switches or function-key camera toggles come first on a portable. Swap the port, try the camera on another machine, and you have your answer without guessing. One honest limit closes the diagnosis: this page analyzes a working feed, and it cannot repair one, so once the panel proves frames are arriving, the lighting and framing guides take over from there.

Sources
  1. 1.

    Imatest, "Luminance," imatest.com, accessed June 2026. https://www.imatest.com/docs/luminance/

  2. 2.

    Mozilla Developer Network, "CanvasRenderingContext2D: drawImage() method," developer.mozilla.org, accessed June 2026. https://developer.mozilla.org/en-US/docs/Web/API/CanvasRenderingContext2D/drawImage

  3. 3.

    Adobe, "How to use photography reflectors," adobe.com, accessed June 2026. https://www.adobe.com/creativecloud/photography/hub/guides/how-to-use-photo-reflectors.html

  4. 4.

    Google, "Face landmark detection guide," developers.google.com, May 2026. https://developers.google.com/edge/mediapipe/solutions/vision/face_landmarker

  5. 5.

    Jim Harmer, "Rule of Thirds," improvephotography.com, accessed June 2026. https://improvephotography.com/34696/rule-of-thirds/

  6. 6.

    Mozilla Developer Network, "MediaTrackSettings," developer.mozilla.org, accessed June 2026. https://developer.mozilla.org/en-US/docs/Web/API/MediaTrackSettings

  7. 7.

    Microsoft, "KSPROPERTY_CAMERACONTROL_AUTO_EXPOSURE_PRIORITY," learn.microsoft.com, February 2023. https://learn.microsoft.com/en-us/windows-hardware/drivers/stream/ksproperty-cameracontrol-auto-exposure-priority

  8. 8.

    Cory Rice, "Three-Point Portraiture Lighting and Beyond," bhphotovideo.com, accessed June 2026. https://www.bhphotovideo.com/explora/photography/tips-and-solutions/three-point-portraiture-lighting-and-beyond

  9. 9.

    Microsoft, "Manage app permissions for a camera in Windows," support.microsoft.com, accessed September 2026. https://support.microsoft.com/en-us/windows/privacy/manage-app-permissions-for-a-camera-in-windows

  10. 10.

    Apple, "Control access to the camera on Mac," support.apple.com, accessed September 2026. https://support.apple.com/guide/mac-help/control-access-to-your-camera-mchlf6d108da/mac

FAQ

It measures how evenly lit the left and right halves of your frame are. Below 15% is good for video calls. Above 35% means heavy one-sided shadow that will look noticeably unprofessional. The most common cause is a window or strong light source directly to one side.

No. CapyToolkit doesn't upload, store, or transmit any video frames. All analysis runs locally in your browser using the canvas API and a locally cached face detection model. Your video feed never leaves your device.

Make sure there is enough light facing you, not just behind you. The face detection model needs reasonable contrast to locate landmarks. Also confirm the browser has camera permission and that no other application is holding an exclusive lock on the webcam at the same time.

10 to 20% of the frame height is the target. The tool draws a dashed guide at 15% to help you calibrate. With your eyes roughly on the upper third line and appropriate headroom above, you match the standard broadcast framing used in professional video calls and news.

The tool reads actual pixel dimensions from the live camera stream. An unusual ratio often means the camera is delivering a cropped or letterboxed feed rather than its full sensor area, which can happen in low light as the camera adjusts its capture region to maintain frame rate.

Chrome, Firefox, Edge, and Safari. Camera access requires getUserMedia support. If you see a permission error, check that the browser has camera access granted in your operating system settings, not just in the browser itself.

Additional resources

Webcam Lighting & Framing Analyzer Reference Every lighting and framing term the analyzer measures, exposure, rule of thirds, and color temperature, defined with the target values it checks against. Webcam Lighting & Framing Analyzer: Code Examples Ring light combos and dual-monitor camera placement setup guides, matched to the exact readings the lighting and framing analyzer reports back.

Guides

Testing a Logitech Webcam Check the resolution and frame rate a Logitech webcam really sends to your browser, fix auto-exposure against a backlight, and see what changes on the C920, C922, C270, BRIO 4K, BRIO 500, StreamCam and MX Brio. Testing a Razer Kiyo Webcam Test the Razer Kiyo series: set the ring light on the original Kiyo, light the Kiyo Pro without one, and check the field of view and resolution on the Kiyo Pro Ultra. Testing an Elgato Facecam Test an Elgato Facecam for lighting balance, working distance and delivered resolution, and see what Camera Hub changes on the Facecam and Facecam Pro. Testing a Microsoft Webcam Test a Microsoft LifeCam HD-3000 or Modern Webcam for lighting balance, framing and backlight handling, including what Teams certification does and does not change. Testing a Webcam With AI Framing Test a webcam with AI tracking or auto-framing: measure with tracking off, check the crop with it on, and see what changes on the OBSBOT Tiny 2, Insta360 Link 2, Dell WB7022 and Anker PowerConf C300. Fixing Bad Webcam Lighting by Light Source Fix a bad webcam lighting score by source: a window behind you, overhead ceiling lights, a ring light placed wrong, a fixed laptop camera or a dim room, with the reading to check after each change. Virtual Background Webcam Test - Frame and Resolution Check Check whether your webcam framing, resolution, and lighting support clean virtual background edge detection in video calls.