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Initial release of CleanBoard. Highlights: • 4 cleanup methods (Divide & Blur, Adaptive Threshold, Whiteboard Enhance, Line Pop) • Perspective correction with auto corner detection • Paint brush for manual touch-ups • Pinch to zoom and pan • Save to gallery and share • Smart share picker when a second image is shared while editing
Clean up whiteboard & document photos instantly. Share crisp, readable results.
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.