v0.6.0

What's new in 0.6.0

Scale bars, as in Metashape

• Choose two markers, give their distance in metres, and the whole chunk is scaled; every bar shows the distance measured on the model and its error. Several control bars are combined, each weighted by its accuracy; check bars only measure.
• Works without coordinates: an object on a turntable, a find, a wall or a trench is scaled in local coordinates. The GPS of a phone or a drone over a few metres is left out as noise; over a site, photo positions, control points and bars are fitted together, each by its accuracy.
• Scale bars take part in Ottimizza camere (two or more, or with control points): the block bends towards their lengths as far as the photos allow.
• Bars from a CSV file, printable scale bars (two coded targets at a known distance, with a ruler and the CSV), drawn in the 3D view; command line ppg scalebar and ppg markers scalebar.
• On a georeferenced chunk a new bar is proposed as a check; a control bar on a chunk georeferenced elsewhere (an imported project) scales it in place, in its CRS.

Markers, as in Metashape

• A marker placed on one photo lies on the surface (dense cloud or tie points) at once: it has coordinates, shows on the model and on the orthophoto and can end a scale bar.
• Markers can be added on the model or the cloud (Marker in the 3D view) and on the orthophoto or the DEM (Marker in the drawing bar).
• Guided placement: a new marker gets blue flags (its estimated place) on the other photos that see it and the Foto pane is filtered on it, with badges (green: measured, blue: to confirm). Open a photo: it is centred on the marker; drag the blue flag onto the point or double click it, then Page Down for the next photo.
• Photos filtered by marker, by point (orthophoto, 3D view) or by area; Coordinate stimate in the Reference pane shows the estimated X, Y, Z of the markers.

Imports

• Metashape projects bring their scale bars (distance, accuracy, check bars) and the accuracy of the markers.
• WebODM tasks bring the camera poses and calibrations and the GCPs as markers measured in the photos, triangulated at once with the errors ODM computed.

Fixes

• Metashape projects in local coordinates scaled by scale bars came in 3 to 14 times too large: the scale of such chunks (a transform with the scale alone) was dropped.

Desktop applications for macOS (Apple Silicon) and Windows are attached below; with pip: pip install -U pyarchinit-photogrammetry. Documentation: README, interface, API.