CleanBoard Whiteboard Scanner

CleanBoard turns blurry, glare-ridden whiteboard and document photos into sharp, readable images - in seconds. No cloud, no account.

Photograph a whiteboard or document and end up with a washed-out, uneven mess?
CleanBoard fixes that in seconds — turning glare-ridden, low-contrast photos into
clean, readable images you can share straight from your phone.

Three powerful cleanup algorithms
• Divide & Blur — the classic GIMP technique: evens lighting, removes background
colour, and makes text and diagrams pop against a white surface.
• Adaptive Threshold — Bradley's local thresholding handles uneven illumination
across large boards without blowing out fine detail.
• Whiteboard Enhance — boosts colour saturation and contrast so coloured markers
stay vivid rather than fading to grey.
Mix and match methods, or apply them in combination for best results.

Perspective correction
Drag the four corner handles to straighten a photo taken at an angle. Tap
Auto-Detect and CleanBoard analyses the image with a Hough line transform to find
the whiteboard edges automatically — then warp the result flat with a single tap.

Fine-tune every result
Adjustable sliders let you dial in blur radius, threshold window, and enhancement
strength per method. A live before/after toggle shows exactly what changed.
Rotate the image 90° left or right any time.

Flexible input and output
• Pick any photo from your gallery.
• Receive images via the Android share sheet from your camera app, file manager,
or any other app — CleanBoard appears as a share target automatically.
• Share the cleaned result to any app with one tap.
• Save directly to your gallery with a single button; a confirmation snackbar
lets you know the moment the file is written.

100% on-device. No account. No cloud.
Every pixel is processed locally on your device. CleanBoard never uploads your
images anywhere, requires no sign-in, and works fully offline.

Whether you're capturing meeting notes, lecture slides, hand-drawn diagrams, or
paper documents, CleanBoard gives you a fast, private way to clean them up and
share them — right from your pocket.