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Kinematic measurement from panned cinematography
P Gervais1, E W Bedingfield, C Wronko
1University of Alberta, Edmonton.
Canadian Journal of Sport Sciences = Journal Canadien Des Sciences Du Sport
|June 1, 1989
Summary
This study introduces a panning camera technique to overcome limitations in traditional 2-D cinematography. The new method effectively measures large object fields, matching traditional accuracy for motion analysis.
Area of Science:
- Cinematography
- Motion Analysis
- Photogrammetry
Background:
- Traditional 2-D cinematography uses a stationary camera, limiting object plane size and potentially introducing errors.
- This method struggles with large object field widths and small subject image sizes, restricting movement analysis.
Purpose of the Study:
- To assess a novel panning camera technique for motion analysis.
- To overcome limitations of stationary cameras in capturing large object fields and small subject images.
- To improve accuracy in motion studies with wide fields of view.
Main Methods:
- A panning camera technique was developed using reference targets for scale and origin.
- The technique was applied to pan a 102 m object field.
- Measurements were compared against criterion distances for field widths of 46 m and 22 m.
Main Results:
- The panning technique successfully captured measurements in a large object field.
- Absolute mean differences between criterion and measured distances were comparable to traditional methods.
- The technique demonstrated effectiveness for field widths of 46 m and 22 m.
Conclusions:
- The proposed panning technique effectively overcomes limitations of traditional stationary camera methods.
- This approach offers comparable accuracy for motion analysis in wide object fields.
- The reference target system provides reliable scale and origin for accurate measurements.