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Several compounding freeze sources in plugins/motion_capture/:
- tracker.py: _run_real had no frame-rate cap independent of the camera's
configured fps (up to 120fps/2560x1440 was possible), and no bound on
consecutive failed reads — a camera that "opens" (cv2 isOpened() can lie,
seen with Windows MSMF/obsensor) but never actually delivers frames would
get hammered forever. Added a 20Hz processing cap, a real test-read before
committing to a camera, and a give-up-after-30-failures fallback to
simulation.
- tracker.py/device.py: cv2.VideoCapture() opening a real camera is a slow,
blocking call — CameraTracker.start() used to do this synchronously on
the caller's thread, which froze the whole app when ProfileManager.apply()
called it during profile load. Now runs on the background thread; status
reporting (CameraDevice) moved to an on_result callback since the caller
can no longer learn the outcome synchronously.
- window.py: the Camera View preview ran a 30Hz GUI-thread timer doing a
full-frame copy + QImage/QPixmap rebuild every tick unconditionally (no
visibility check) — dropped to 10Hz and skips entirely when hidden.
Camera enumeration (list_cameras(), up to 8 sequential cv2.VideoCapture
probes) also ran inline in the window constructor, blocking it open the
same way camera_panel.py's CameraScanThread already avoided for the Add
Device dialog — moved to the same async pattern here.
config_window.py: separately, ConfigWindow._dev_poll (device status label
refresh) was stopped in closeEvent and never restarted, since MainWindow
reuses the same ConfigWindow instance across opens — invisible before
because connect() was synchronous, but with the above change a device can
sit in CONNECTING for a while, and a stale poll made that look stuck
forever after reopening the window. Restart it in showEvent.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
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Profile integration:
- CameraDevice.get_save_config() serialises camera_index, simulate,
resolution, fps — cameras now persist in .labdaq profiles
- ProfileManager.register/unregister_device_factory() lets plugins
register their device classes for profile restoration without
core → plugin dependency
- MotionCapturePlugin registers CameraDevice factory on load/unload
Camera configuration:
- Add Frame Rate combo to CameraPanel (Default/15/24/30/60/120 fps)
defaults to 30 fps; flows through to CAP_PROP_FPS on connect
- tracker.start() accepts fps param alongside existing resolution
Tracking persistence:
- CameraTracker.is_running() — checks thread alive state
- MotionCaptureWindow initialises _connected from tracker.is_running()
so reopening the window resumes the live feed without restarting
the camera or losing the active tracking state
Window state:
- Plugin saves px_per_mm + camera_idx when window closes
- Reopened window restores saved values and syncs mode/shape UI
from tracker state via restore_ui_state() (signals blocked to
avoid resetting tracker)
- Window type changed to Qt.WindowType.Window for independent
close button on all Linux WMs
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
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Tracking:
- Add "template" mode (default) using snapshot + shape-masked matchTemplate
- Add "csrt" mode as alternative for texture-rich targets
- set_roi_rect(x, y, w, h, frame_rgb) initialises from exact selection rect
- set_roi() delegates to set_roi_rect (centred square, backwards-compat)
- start() accepts resolution=(w, h) to set camera capture resolution
Selection UX:
- Replace QLabel feed with FrameSelector widget (custom QWidget)
- "Click to Track" freezes frame; user scrolls to zoom (anchored to cursor),
right-drags to pan, left-drags to draw rubber-band selection
- Shape preview: rectangle or inscribed ellipse depending on mode
- "Confirm Selection" extracts template from frozen frame and starts tracking
- "Clear" cancels selection or clears active tracking
Configuration:
- CameraPanel adds Resolution combo (Default / 640×480 / 720p / 1080p / 1440p)
- CameraDevice stores and forwards resolution to tracker.start()
- Template Match listed first in Mode combo; shape combo hidden for CSRT
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
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Replace camera index spinbox with a combo listing detected cameras by
name. On Linux enumerates /dev/video* and reads device names from sysfs
(fast, no probing). Fallback probes cv2.VideoCapture indices 0-7 on
other platforms. Simulation entry always appended as last option.
Also adds explicit simulation mode (index -1) to tracker.start() and a
rescan button (⟳) in both the main window and the Settings > Plugins
widget.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
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Tracks a user-selected point via webcam (OpenCV CSRT tracker) and
streams x_pos / y_pos pixel coordinates as live channels into the
acquisition pipeline. Falls back to a Lissajous figure simulation
when opencv-python is not installed, so the plugin works immediately
without hardware.
- tracker.py: background thread, real camera + sim modes, thread-safe API
- device.py: BaseDevice reading x/y from tracker, wires into engine
- filter.py: custom pixel_to_mm filter (registered in FILTER_CLASSES)
- window.py: floating tool window, live feed, click-to-track ROI selection
- plugin.py: LabPlugin wiring all pieces together, toolbar button,
settings widget, profile save/restore
Also: PluginAction.button_ref_callback lets plugins store a ref to their
toolbar button so they can uncheck it when their window closes.
opencv-python install note added to requirements.txt.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
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