Full text: Proceedings International Workshop on Mobile Mapping Technology

Figure 4 Outline for Experiment 
Table 2 Major Components for the Camera Part 
Pickup Device 
Interline-transfer 1/2-inch size CCD 
Effective Picture Elements 
640(H) X480(V) 
Cell Size 
9MmX9Mm(VGA Format) 
Scanning System 
Progressive Scan 525 line 60Hz 
External Dimension 
46(W) X 39(H) X126(L)mm 
16mm C mount 
4.1 Experiment 
For dynamic analysis of human motion using the video 
theodolite and the digital video system, a digital camera was 
mounted on a motorized video theodolite. In this combined 
system, digital sequential image for 24 seconds (1440 frames) 
can be acquired in real-time, but due to the relatively slow data 
(rotation parameters) acquisition and an asynchronous, walking 
experiment was performed under the following condition. 
1. Walking course is divided into 3 sections, right, center and 
left section. 
2. After the camera calibration at the center section, video 
theodolite rotate to direction of right section. 
3. Sequential digital image while walking in the right section 
are taken. 
4. Video theodolite skip to the center section. 
5. Imaging start when a human comes the center section. 
6. Similar, video theodolite skip to the left section and imaging 
are performed. 
7. Image coordinates of markers are continuously recorded while 
8. 2D coordinate of each marker is obtained using calibration 
results and changing angles in vertical, horizontal direction 
since the camera parameters for each section image can be 
estimated as the sum of changing vertical and horizontal 
values resulting calibration results respectively. 
10. The exposure positions for each section image are corrected. 
Figure 4 shows the outline for this experiment. In order to 
analyze abnormal walking, the left knee was fixed by brace, and 
makers were fitted on the feature points such as the head, waist, 
and left shoulder, elbow, wrist, knee, ankle, tiptoe. Figure 6 
shows the skeleton image every 5 frames in each section. 
Walking course 
Video theodolite 

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