QtAliceVision is a C++ plugin providing:

• classes to load and visualize AliceVision and Alembic data through QML
• an OpenImageIO backend for image IO in Qt.

Currently available:

• Features Viewer
  • Position, scale and orientation
  • Status: extracted, matched or reconstructed
• Matches Viewer
• Statistics
  • Per view statistics with reprojection error, observations histograms
  • Global SfM statistics with number of landmarks/matches, reprojection errors, observations per view
• Float Image Viewer
  • Visualize images with floating point precision
  • Dynamically adjust gain and gamma
• 3D Depth Maps
  • Visualize depth/sim maps generated by the AliceVision framework in a 3D viewer
• Alembic 3D visualization
  • Point clouds
  • Cameras
• OIIO backend
  • Read RAW images from DSLRs
  • Read intermediate files of the AliceVision framework stored in EXR format

The project is released under MPLv2, see COPYING.md.

Get the source code:

git clone --recursive git@github.com:alicevision/QtAliceVision.git cd QtAliceVision

See INSTALL.md to build and install the project.

Once built and with the plugin installation folder in QML2_IMPORT_PATH:

• Create an MSfMData object to get access to the SfM information:

import AliceVision 1.0 MSfMData { id: sfmData sfmDataPath: "/path/to/SfM/sfmData.abc” }

• Create an MTracks to load all matches and get access to tracks information:

import AliceVision 1.0 MTracks { id: tracks matchingFolder: "/path/to/FeatureMatching/UID/” }

• Create a FeaturesViewer to visualize features position, scale, orientation and optionally information about the feature status regarding tracks and SfmData.

FeaturesViewer { colorOffset: 0 describerType: "sift" featureFolder: "/path/to/features/folder" mTracks: tracks viewId: 101245654 color: “blue” landmarkColor: “red” displayMode: FeaturesViewer.Points mSfmData: sfmData }

• Create an MSfMDataStats to display global statistics about your SfMData:

MSfMDataStats { msfmData: msfmData mTracks: mTracks }

• Create an MViewStats to display statistics about a specific View of your SfMData:

MViewStats { msfmData: msfmData viewId: 451244710 }

• Create a FloatImageViewer to display an image with floating point precision, allowing to dynamically adjust the gain and gamma:

FloatImageViewer { source: "/path/to/image" gamma: 1.0 gain: 1.0 width: textureSize.width || 500 height: textureSize.height || 500 channelMode: "RGB" }

• Create a DepthMapEntity to display a depth map as a point cloud in a 3D viewer:

import DepthMapEntity 1.0 Scene3D { DepthMapEntity { source: "depthmap.exr" } }

• Create a SfmDataEntity to display point clouds (in .abc, .sfm or .json format) and cameras in a 3D viewer:

import SfmDataEntity 1.0 Scene3D { SfmDataEntity { source: "/path/to/pointcloud.sfm" } }

When added to the QT_PLUGIN_PATH, all supported image files will be loaded through this plugin.