LensUp

什么是 LensUp？

`Scan filters: grayscale, clean white-background, B&W, color — plus shadow removal` - `Perspective correction with draggable corners (CamScanner-style)` - `Fade colored pen marks on printed worksheets` - `Compress toward a target size like 200 KB (best effort — returns the smallest achievable file)` - `ID card: front + back at physical card size on one sheet; 2-up / 4-up layouts to save paper` - `Multi-page: reorder by drag, per-page rotate/crop, print & share directly`