Visualization and comparison of crash-test recordings
frontal impact of a Toyota Corolla/ Auris (contributed courtesy of EURO NCAP)
The direct comparison of two parallel video recordings often turns out to be very difficult. The sequences of actions are often too complex and the human brain is not in a position to process all the incoming information at the given speed. By dividing the information into unimportant and important portions (e. g. by deleting the backgrounds) it is reduced to the essential facts.
The differences in the degree of deformation are clearly visible at first glance. The main advantage is again the interconnection of time and image – it is possible to analyze the changes in relation to time. If the viewer changes the intervals between the frames and browses through the sequence of frames, further details and differences become apparent.
If the test conditions were better adapted to the analysis tool, e. g. if certain parts of the vehicle or the dummy were coded with respective colours, these parts could be isolated and their changes viewed separately. ID tags could be used as a further level of information by storing sensor values and thus providing detailed data for examination and analysis.
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Vehicle outlines
A further type of display only shows the outlines of the vehicles in different colours. By fading in the two modes, the differences become visible in the graphic representation and are apparent when playing the recording.
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