VisualeyezTM the EASE of motion capture

Every individual VisualeyezTM tracker is factory-calibrated by instruments with 3D accuracies traceable to international standards. All data filters can be turned on or off. You can fully control the system and trust the data you get with absolute confidence.

Micrometer resolution enables a VisualeyezTM tracker to detect minute movements even at a distance. Closely spaced markers can be easily distinguished for capturing complex motions such as facial expressions, finger movements, or machine vibrations. Combining this with the wide-angle operation, large coarse motions and small intricate motions can be captured simultaneously.

The marker position data captured by a VisualeyezTM system are sampled at precisely known microsecond timing. This is important for many scientific applications, especially those which require uniform precise motion data feedback in real-time. This feature also allows temporal marker capture problems inherent with some digital motion capture systems to be resolved by mathematical interpolation. Note: Certain optical motion capture systems using digital sensors (e.g., CCD or CMOS image sensors, or photodetector arrays) may have temporal marker capture problems. Moreover images from several cameras are required to triangulate the 3D position of a marker, each camera bearing a different time at which the same marker is captured. Hence the temporal problems of these systems cannot be practically resolved! (See the picture below. The bent bat is due to the bottom portion of the camera image being sampled earlier than the top portion.)

Wrong data is worse than no data. An optical marker can be partially occluded and yield inaccurate position data as a result. The larger a marker is the more likely it can be partially occluded, and the larger the introduced inaccuracy will be. A VisualeyezTM system uses tiny LEDs as markers which are nearly impossible to occlude partially. Should partial occlusion ever occur, the introduced inaccuracy will still be very small. Hence there is practically zero probability of generating wrong data by a VisualeyezTM system.
The VisualeyezTM system outputs the captured data after two sampling periods. For a VZ4000 tracker, this means the data can be output within 0.5 millisecond (< 0.0005s) from the time the marker light reaches the tracker. Since no marker identification problem will ever occur, the user can depend on receiving a correct marker's data within this timing for implementing real-time applications reliably.
Lightweight yet rugged design makes a VisualeyezTM system the most portable motion capture system available. A 4-tracker system can be transported or carried on as baggages on flights by two people to anywhere, then set up and operated within about 30 minutes!
It's very easy to operate even a multi-tracker VisualeyezTM system for most motion capture applications:

Turn on the system.
Click on 'Auto Configure' (to connect the trackers to the computer)
Start 'Auto Detect Targets' (to find out which markers have been attached to the subjects)
Set desired sampling period or capture frame rate
Press 'Record' to start motion capture
By using the recently released VZAutoCal, even a multi-tracker VisualeyezTM system is now fully automatically calibrated. No manual user calibration effort is required any more. Should any tracker gets bumped or moved during a capture, just wait for a second or two, and the system will recover the calibration by itself!

VZAutoCal will also update the system calibration continuously if the user so chooses. It will make use of the data captured during a session and optimize the system calibration at intervals chosen by the user. The updating can be stopped at any time by the user if desired.
Each VisualeyezTM system tracker can capture over a huge 190m3 space. This is due to its widest angle operation of all optical motion capture systems in the world (see Specifications). As a result, a 4-tracker system can be easily arranged to yield almost 6m x 6m full-body capture space.

VisualeyezTM systems do not require any strobers or ring-lights to sense the marker positions. The trackers can face each other without causing any blinding problem! Hence the system can be laid out and oriented in any way to capture the desired motions. For example, the chest motions can be captured even when a person is bending down by simply laying a tracker on the ground and pointing up at the chest area.
The nominal operating distance of a VisualeyezTM tracker is stated in the Specifications. By increasing the 'Extended Exposure' setting via the provided VZSoft GUI, the capture distance can be easily increased with some tradeoff to the maximum possible sampling frequency. This is very useful when long sensing distance is more important.

The size of a VisualeyezTM system, hence the capture space and complexity, can be easily scaled up or down to fit a specific motion capture application. A single tracker can already capture the marker positions in 3D. Up to 24 trackers have been tested to operate together as a large multi-tracker system.
The capture process of a VisualeyezTM system can be started and stopped by an external equipment (or device) in several ways. The system can also generate signals for triggering other equipment to operate synchronously.
Each marker of a VisualeyezTM system is automatically assigned a distinct ID number during operation. The captured 3D data is automatically associated with this ID by the system. No data cleaning, no special marker arrangement, no special actor motions, nor any post-processing is ever required to help the system correctly identify a marker. Absolutely no marker swapping problem will ever occur!
Sampling slow motions at high frequency would result in large amount of useless data, wasting storage space and any data processing effort. VisualeyezTM system allows different markers to be sampled at different frequencies to capture motions of very different speeds at about the same spatial resolution. This is highly useful for many scientific applications. For example, the golf club head moves much faster than the golfer's body in a glof-swing motion. To capture at approximately the same spatial resolution, the clubhead markers can be captured four times faster than the body markers.

The marker sampling frequency of a VisualeyezTM system can be set to any value to suit an application. For tracking a slow motion the sampling rate can be set to be extremely low, for days or even weeks of continuous capture. Since there is no marker identification problem, high frequency sampling is not necessary except for tracking very high speed motions. For applications in which very high-speed and low-speed motions occur simultaneously, 'multi-rate sampling' can be applied to make the most effective use of the system capabilities.
VisualeyezTM system further includes Accessories and Software functions for digitizing the 3D shapes and sizes of complete objects for modeling or reverse-engineering applications. The same are also useful for defining the desired coordinate reference frame for the system.