Tracking:

• Manual and automated object tracking with position, velocity and acceleration overlays and data.
• Center of mass tracks.
• Interactive graphical vectors and vector sums.
• RGB line profiles at any angle, time-dependent RGB regions.

Modeling:

• Model Builder creates kinematic and dynamic models of point mass particles and two-body systems.
• External models animate and overlay multi-point data from separate modeling programs such as spreadsheets and EjsS simulations.
• Model overlays are automatically synchronized and scaled to the video for direct visual comparison with the real world.

Video:

• Free Xuggle video engine plays and records most formats (mov/avi/flv/mp4/wmv etc) on Windows/OSX/Linux.
• Video filters, including brightness/contrast, strobe, ghost trails, and deinterlace filters.
• Perspective filter corrects distortion when objects are photographed at an angle rather than straight-on.
• Radial distortion filter corrects distortion associated with fisheye lenses.
• Export Video wizard enables editing and transcoding videos, with or without overlay graphics, using Tracker itself.
• Video Properties dialog shows video dimensions, path, frame rate, frame count, more.

Data generation and analysis:

• Fixed or time-varying coordinate system scale, origin and tilt.
• Multiple calibration options: tape, stick, calibration points and/or offset origin.
• Switch easily to center of mass and other reference frames.
• Protractors and tape measures provide easy distance and angle measurements.
• Circle fitter tool fits circles to 3 or more points, steps or tracks.
• Define custom variables for plotting and analysis.
• Add editable text columns for comments or manually entered data.
• Data analysis tool includes powerful automatic and manual curve fitting.
• Export formatted or raw data to a delimited text file or the clipboard.
• Display measured values using custom number formats if desired.

Digital Library resources:

• OSP Digital Library Browser provides easy access to online collections of videos and Tracker resources.
• Use the DL Browser to find resources by name, author, keywords or other metadata.
• Use the DL Browser to create, edit and share your own video and resource libraries.
• Use Tracker to export self-documenting ZIP resources ideal for the DL Browser.

Other:

• Full undo/redo with multiple steps.
• Page view displays html instructions or student notes.
• User preferences: GUI configuration, video engine, default language, font size, more.

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