Goal-directed video metrology
We investigate the general problem of accurate metrology from uncalibrated video sequences where only partial information is available. We show, via a specific example — plotting the position of a goal-bound soccer ball — that accurate measurements can be obtained, and that both qualitative and quan...
| Main Authors: | , |
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| Format: | Conference item |
| Language: | English |
| Published: |
Springer
2005
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| Summary: | We investigate the general problem of accurate metrology from uncalibrated video sequences where only partial information is available. We show, via a specific example — plotting the position of a goal-bound soccer ball — that accurate measurements can be obtained, and that both qualitative and quantitative questions about the data can be answered.
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From two video sequences of an incident captured from different view-points, we compute a novel (overhead) view using pairs of corresponding images. Using projective constructs we determine the point at which the vertical line through the ball pierces the ground plane in each frame.
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Throughout we take care to consider possible sources of error and show how these may be eliminated, neglected, or we derive appropriate uncertainty measures which are propagated via a first-order analysis. |
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