What's new in iWitness/iWitnessPRO V2?

Numerous improvements have been incorporated into Version 2 for both iWitnessTM and iWinessPROTM, which lead to greater functionality, operator ease of use, and speed enhancements to image-based 3D measurement

Since its release in 2004, iWitness has grown in popularity to become the premier close-range photogrammetry software for a host of measurement tasks. iWitness employs inexpensive, off-the-shelf digital cameras to perform accurate 3D measurements in a wide range of application areas, including traffic accident reconstruction, forensics, dimensional inspection in engineering and construction, architectural measurement, heritage recording and model building for the animation industry.

The simple yet powerful user interface, coupled with the accurate and reliable photogrammetric engine, which runs automatically in the background, has made iWitness a very popular choice for 3D measurement. iWitness also contains a module for automatic camera calibration, providing the critical parameters for use within iWitness itself, or for export to other software.

Notable improvements in Version 2.2

- Save/load project improved stability, bug fixes, speed enhancements

- Ability to export .txt format in project linking

- 1/2 keys in Edit/Review mode to drive to previous & next points

-New miscellaneous options in the Project Settings dialog box

- Warning dialog presented if 3-2-1 or set scale is attempted during referencing mode.

Notable improvements in Version 2

- Network Linking has been extended to 12 networks

The number of overlapping projects that can be linked into a common coordinate system has been increased to 12. Adjacent projects require three or more common points, with corresponding labels having the prefix ‘CP’. The linking process is fully automatic, and it can create a single .DXF file of all linked object points for later CAD analysis.

Click here to see a Network Linking example where four overlapping projects were linked to form a 3D object point field covering a distance of over 1100’ (335m) of a rail track in Texas.

- Ability to Import the 3D object point data from a second iWitness project having the same object coordinate system into the 3D View of a currently open project, which allows the point field from both projects to be seen in a single 3D View.

Click here to see an example (WMV movie clip) of this new feature applied in the comparison of the shape of a crash-damaged car against its original condition. It is often advantageous to visually analyze two networks that share a common coordinate system.

- Choice of 1 or 4 or 6 or 9 images when entering Edit/Review mode. Allows for quick editing of a single image's referenced points.

- Support for object points to be referenced in geographic coordinates (Latitude, Longitude, Height) to facilitate viewing of measured networks in Google Earth.

iWitness now supports the import of control points in geographic coordinates (Lat, Long, Ht) as determined for example via a hand-held GPS unit. Once a network is transformed into geographic coordinates via these control points it can be exported in the form of a KML file for display within Google Earth.

Click here to see a tutorial on KML file generation within iWitness and iWitnessPRO.

- Triplet offset targets (iWitnessPRO only)

iWitnessPRO now supports the use of triplet offset targets which facilitate automatic 3D measurement of untargetable features, where it is difficult to accurately place a single target (such as the right-angled corner of a bench-top, or the curved edge of a kitchen sink). The triplet offset target design is straightforward; the tip of the triplet offset designates the point of interest and the accuracy of measurement is the same as for a targeted point.

To review a tutorial of how Triplet offset targets can be used, click here.

To see a project example (and wmv movie) of 3D modeling a glass shower enclosure, click here.

- Extension of line connections to Offset Points

Accident reconstruction practitioners routinely use DCS photogrammetric markers (PMs) to efficiently measure crash scene evidence. Often times, it is desirable to look at the crash in profile view, with the 3D points & lines of the PMs offset to the ground surface. Lines can now be drawn connecting offset points and these can also be exported in a DXF file for CAD analysis.

Click here to see a real-world Interstate Highway crash mapping where the new feature of line connection to offset points was employed.

- New safety mechanism in place to stop user referencing between two un-oriented images, in a network where oriented images exist

In past versions of iWitness/iWitnessPRO, new users would sometimes try and reference two un-oriented images, when the network was already oriented. This situation is no longer possible in Version 2 without a “warning” presented to the user. To see the “warning dialog box” that’s presented when this situation is invoked, click here.

- Point centroiding mode

The new point centroiding mode allows automated target centroiding to high-contrast dot-targets by simply dragging a box over the target with the mouse. This expands the semi-automated image point measurement via the X-key and C-key options. Click here to see a photogrammetric marker measured with the point centroiding mode tool.

- Ability to reference an image within the 3D view

Referencing can now be carried out between the 3D View and the image view, rather than just between two images. This feature allows a speeding up of referencing, since one need only click on an already referenced 3D point in the 3D view and then on the corresponding point in the image view.

Click here to see an example

- Ability to manually enter 3D coordinates into a network

3D object point coordinates, e.g., design values, can now be entered into an iWitness network via the 3D Points dialog. Click here to see an example of this ADD feature.


- Ability to launch both XYRectify & Zaraf from within iWitness

The software programs XYRectify (a stand-alone software program for plane rectification) and Zaraf (a preprocessor program used to convert scanned images into equivalent images that would have been otherwise recorded with a digital camera) are now offered for free with Version 2. These two programs are launched from the File pull-down menu.

- Ability to ‘flatten’ to the XY plane (ie Z=0) for DXF output

This feature is useful for reverse engineering projects that require XY flat-patterns for NC milling operations. The option is available via the DXF export options dialog box.

- Improvements to status bar to help monitor photogrammetric network characteristics

The integrity of the photogrammetric bundle adjustment process can be closely monitored via the values for the Project RMS and the Geometry Quality Factor which are shown on the Status Bar.

- Ability to print out the list of program hot-keys

- Image scanning of red targets and associated ‘driveback’ feature

- Updated image scanning dialog, for greater control over automation

- Updated Global Camera Database to support the latest digital cameras

- New popup information in image thumbnails

- Tooltips for blue predicted points

- Greater flexibility over what to display in the 3D view

- Numerous bug fixes, improvements to program stability and speed increases across the board

- To UPGRADE iWitness V1.xx to iWitness V2, the upgrade price is $295.00. The customer's dongle key is upgraded electronically (via email). To upgrade, click here.

- The iWitnessPRO V2 Upgrade is free to licensed users of iWitnessPRO V1.xx. Click here for the upgrade process.

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