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.