4D

4D

Adding the dimension of time to high-precision 3D is an exciting next step to enable a deeper understanding of true anatomical movement and function. 3dMD’s 4D capture systems are already establishing a new field of research which we believe will rapidly lead to new ideas and perspectives on human biomechanical behavior without the need for invasive radiation. To date, 4D motion has traditionally been documented with individual markers that have been placed on the subject’s skin. While marker tracking has enabled a number of applications such as gait analysis and computer generated automation, the distance between markers, by nature, fails to record a lot of surface detail which could be relevant when treating a patient such as facial expressions in cleft babies. 3dMD’s technique avoids this by literally tracking the deformation of the entire surface frame by frame.

3dMD built its first dynamic prototype in 1998 and filed new patents in the areas of real-time surface tracking in 2001. The first production 3dMD 4D facial capture system was installed in 2005 and several more 4D systems have been delivered to universities and medical research groups. Many preliminary papers have been published on 3dMD’s 4D technology and they demonstrate that 4D opens up new possibilities for monitoring subject movement and understanding the mechanics of facial function and expression.

At present 3dMD considers this technology to be a field research tool as there remains much to be learned from analyzing the resultant information. In conjunction with its initial customers, 3dMD has already started working on tomorrow’s applications which will embrace real-time monitoring of patients through to advanced simulation models that replicate functional behavior and expression following dental and surgical intervention. The 3dMD 4D systems in the field have already recorded hundreds of active subjects, so if you are researching these types of areas 3dMD’s 4D technology will significantly increase your subject information base.

Specification:
• Coverage: 180-degree face capture (ear-to-ear/2 viewpoints) allowing for head movement
• Capture speed: 60 3D frames per second for up to a 10 minutes capture cycle at highest resolution
• Geometry Generation per 3D frame: One continuous point cloud produced from the two stereo camera viewpoints, which eliminates the data errors associated with merging/stitching data sets together
• Server based multiprocessor rendering
• Frame display software (basic 3D movie)