Whiteboard Capture

Whiteboard Scanner App for iPhone

Point the iPhone at a whiteboard and ScanLens removes glare, flattens shadows, and keeps dry-erase ink readable — black, blue, red, green, and the rest of the marker rack. The result is a clean PDF or JPG of the board content, ready to email, drop into Notes, or run through OCR. On-device. No account.

Glare removal Shadow flatten Marker colors kept Export PDF or JPG

Best for: meeting-room recaps, classroom lectures, brainstorming photos, design-sprint snapshots, kanban-board archives. Works best with even-ish lighting and no direct backlight from a window. Extreme glare or near-erased ink will still degrade — the mode helps a lot but it isn't magic.

How does a whiteboard scanner app handle glare?

A whiteboard scanner app removes glare by treating the captured image as two layers: the marker ink layer (high-frequency, sharp edges, colored pixels) and the surface layer (low-frequency brightness gradient — overhead lights, window reflections, shadows from the photographer standing in front of the board). The pipeline estimates the surface layer with a large blur, subtracts it to flatten lighting across the board, then boosts local contrast so the ink layer reads crisply against an even white background.

ScanLens runs this on-device through Apple's Vision and Core Image frameworks. It detects the board's rectangular outline, corrects perspective, splits ink from surface, removes the glare and shadow patches, and renders the result with marker colors preserved. The whiteboard mode is tuned differently from the regular document scan — a regular doc-scan flow assumes flat paper and pushes the background to pure white, which destroys the subtle off-white of a real board and turns light-colored ink into noise. Whiteboard mode keeps just enough of the surface tone to let red, green, and orange markers stay distinct.

Whiteboard mode vs regular document scan — which one to pick

The regular document mode is built for flat paper: receipts, contracts, printed reports, lined notebook pages. It assumes the page is matte, the contrast between ink and background is high, and any darker patches in the capture are unwanted shadows from the photographer's hand or phone. The output forces the background close to pure white and pushes anything ink-like toward solid black-or-color. That works beautifully for paper. It fails on a whiteboard.

Whiteboard mode changes three things. First, it expects glare — the glossy surface bounces overhead lights back into the camera as bright hotspots, which document mode would interpret as the "true" background and crank the rest of the image darker. Whiteboard mode flattens hotspots locally instead. Second, it expects colored ink: dry-erase markers in red, blue, green, and purple need to keep their hue, where document mode treats colored pixels as scanner noise. Third, it tolerates a much wider range of background brightness across one shot, because a four-foot board next to a window has a real lighting gradient the photographer can't fix.

Use document mode for anything that started life as paper. Use whiteboard mode for glossy melamine and glass boards, flip charts taped to a wall (still works — pen on paper is closer to whiteboard than to a clean printout when shot at an angle), and any vertical surface with mixed-color handwriting you want to preserve.

What whiteboard mode does in ScanLens

Glare removal

Bright spots from overhead lights or window reflections get flattened locally rather than pushing the whole image darker. The hotspot becomes the average board brightness in that region, so the ink underneath (or near it) stays readable. Works well on diffuse glare and soft hotspots; a single sharp specular highlight from a bare bulb may survive as a lighter patch — shoot from a slight angle to push it off the board.

Shadow flattening

Standing in front of a meeting-room board with the camera held up means your own shadow falls across the bottom third. Whiteboard mode estimates the full lighting gradient and removes it — your shadow disappears and the bottom of the board looks the same brightness as the top. The same flow handles uneven overhead lighting where one half of the board is brighter than the other.

Marker color preservation

Black, blue, red, green, purple, and orange dry-erase markers come through with their hue intact. The pipeline separates ink color from surface tone before flattening, so a red arrow stays red and a green checkmark stays green instead of bleeding toward black. Faint or near-empty markers that look gray on the board will still look gray in the scan — the mode preserves what's visible, it doesn't reconstruct ink that the camera couldn't see.

Multi-section capture for long boards

Meeting rooms often have wall-to-wall boards eight or twelve feet wide. Capturing the whole thing in one shot loses detail. Use batch mode to grab the left third, middle, and right third as separate pages, then export the set as a multi-page PDF. Each section gets its own glare and shadow treatment, so a board with a window glare patch on the right doesn't drag the whole exposure down.

Whiteboard Flow

How to scan a whiteboard in ScanLens, step by step

A single board section takes about ten seconds end to end. The capture-and-clean pipeline runs on-device — no upload, no waiting on a server.

Step	Action	Tips
1	Tap whiteboard mode	From the scan menu — separate preset from "document"
2	Frame the board in viewfinder	Edge detection draws a guide; shoot at a 5–10° angle if glare is bad
3	Capture (auto or manual)	Auto fires when the board fills the frame and the phone is steady
4	Review the cleaned image	Glare and shadows already removed; tweak crop corners if needed
5	Capture extra sections (optional)	Batch mode keeps them as pages of one PDF — left, middle, right
6	Share PDF or JPG	iOS share sheet → Mail, Notes, Files, Slack, AirDrop to laptop

When people reach for a whiteboard scanner on iPhone

Team meeting recaps

Sprint planning, retros, architecture review — the board ends the hour covered in arrows and box-and-line sketches no one will retype. One scan, one PDF in the channel, the meeting note links to it. The cleaned image survives Slack compression better than a raw photo because the contrast is even.

Classroom and lecture boards

Lecturers fill a board with equations or diagrams, erase, refill, erase. Students photograph at break time, but the raw shots are full of overhead-light glare and seat-row shadows. Whiteboard mode flattens both so the algebra is readable later. Pair with OCR if the handwriting is block-print neat.

Brainstorm and ideation sessions

Sticky-note grids, mind maps, "yes-and" trees from a group session. Marker colors matter — green often means "let's do this", red means "blocked", purple means "parking lot". The mode keeps the color coding so the photo still reads the same way three weeks later in the project doc.

Design sprints

Crazy-8s sketches taped up next to dot-vote results, journey maps drawn across an eight-foot board. Multi-section capture handles the long-board case; each sketch gets its own page in the PDF. Designers send the set to whoever couldn't be in the room without rehosting on a separate file-sharing tool.

Kanban and standup board snapshots

Physical kanban boards still exist in plenty of teams. A quick daily scan into the team Drive folder gives async members a snapshot of the column state. Whiteboard mode makes the index cards readable even when overhead fluorescents make the cardstock look washed-out in a raw photo.

Frequently Asked Questions

Does the whiteboard mode work on glass walls or glass whiteboards?

Mostly yes, with a caveat. Glass whiteboards reflect more of the room than melamine boards, so direct overhead lights or a window behind the camera create harder reflections. ScanLens removes diffuse glare and soft hotspots well; a sharp specular highlight from a single bright bulb may still survive as a lighter patch. Shoot at a slight angle (5–10°) rather than dead-on to push reflections off the glass before capture.

Can it handle dim conference-room lighting?

It can, up to a point. The pipeline boosts local contrast, so faint pencil-thin ink against a slightly dirty board will lift cleanly. Very dim rooms (single lamp on the far wall, blinds drawn) hit a noise floor — recovered handwriting becomes grainy. If the room is dark enough that you can barely read the board with your eyes, the scan will be marginal. Turn on the overheads or step closer to a window before capturing.

Does it OCR the handwriting on the whiteboard?

Yes. After the whiteboard scan, run handwriting OCR on the result — ScanLens uses Apple's Vision framework, which handles printed text well and reasonably-neat handwriting in English plus 50+ other languages. Block printing on a meeting whiteboard usually OCRs cleanly; cursive scrawl or partially-erased ink will produce gaps. See the dedicated OCR page for detail on which scripts and handwriting styles work.

Can I scan multiple whiteboard sections and join them?

Yes — use batch mode to capture each section as a separate page (left third, middle, right third) and export the set as a multi-page PDF. The app does not auto-stitch them into one wide panorama image; that needs a tripod and a dedicated panorama tool. For most meetings, page-per-section is more useful anyway because each section usually maps to one topic.

Does whiteboard mode preserve marker colors?

Yes. Standard dry-erase colors — black, blue, red, green, sometimes purple and orange — come through with their hue intact after glare removal. Faint pastel markers or nearly-empty pens that read as gray on the board will read as gray in the scan; the mode preserves what's there but doesn't invent ink that wasn't visible. Pencil and pen on flip-chart paper also work, treated as a non-glossy variant of the same flow.

Does the scan upload anywhere?

No. All capture, glare removal, shadow flattening, and PDF/JPG export happens on the iPhone. There is no ScanLens account and no upload step. If you choose to save the result to iCloud Drive or share it by email, that's standard iOS — your iCloud, your inbox, not a ScanLens server. Confidential strategy on a meeting room board stays on the device unless you send it somewhere yourself.