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erikandClaude Opus 5.5 f47df93c97 Live browser view while scanning, with downloads and screenshots

scan.py --view serves a page (myscan/webview.py, standard library only) with
MJPEG streams of the latest camera frame and the page as it is stitched,
Start/Stop buttons, PNG/JPEG download of the finished page and a screenshot
of the current view.

myscan/live.py keeps a downscaled preview: new frames are pasted at their
current best pose, and a background thread re-solves the pose graph every
1.5 s (throttled to at most ~50% duty) and redraws the preview off the
registration thread. PageGraph.solve can now run on a prefix of the frames
while add() continues, keeping loop closures and features between solves,
so the final solve after the stop press is much shorter. Frame PNGs are
saved on their own thread.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

2026-10-02 13:51:59 +00:00

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myscan

Linux driver tools for the Hama myScan (00052343) scanner mouse, a Dacuda design (USB 274f:c001: UVC MJPEG camera + HID mouse).

myscan/xu.py — UVC extension-unit access: switch between mouse and scan mode, LEDs, exposure
myscan/frame.py — fix the lying JPEG header and decode the per-frame sensor record (laser dx/dy)
myscan/calib.py — per-device calibration from the mouse's EEPROM: colour gains, flat field, lens undistortion
myscan/pagegraph.py — assemble a page from all frames at once: frame-to-frame registration, loop closures between passes, pose-graph optimisation (used by scan.py and stitch.py)
myscan/stitch.py — the older live, frame-by-frame stitcher (stitch.py --live) and shared helpers
tools/scan.py — scan with the button: python tools/scan.py (press to start, press again to stop). --view [PORT] serves a live view at http://<host>:8000/: the camera, the page as it is stitched (re-solved every 1.5 s, current position outlined), Start/Stop buttons, PNG/JPEG download of the finished page and a Screenshot button (camera + page + status as one PNG)
myscan/live.py, myscan/webview.py — the live preview and its browser viewer (standard library only)
tools/record.py — record a scan session: python tools/record.py -d 25 -o scan_text
tools/stitch.py — stitch a recording: python tools/stitch.py scan_text -> scan_text/page.png
tools/probe.py — log raw frames and HID reports side by side
tools/scantest.py — minimal scan-mode test: grab frames, decode records, restore mouse mode

See FINDINGS.md for the protocol and calibration notes, and EEPROM.md for the calibration blob.

Setup: python -m venv .venv && .venv/bin/pip install -r requirements.txt

Calibration cache: calib/eeprom_3000.bin in this repo is the EEPROM dump of one specific mouse. myscan/calib.py uses that file whenever it exists and only reads the mouse when it is missing. With a different mouse, delete it first (rm calib/eeprom_3000.bin), so the next scan reads and caches your own unit's calibration (about 15 s).

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myscan

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