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. Author manuscript; available in PMC: 2019 Oct 12.

Published in final edited form as: ACM Trans Knowl Discov Data. 2013 Sep;7(3):10.

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Fig. 3. — Screen captures from the original video from which the Gun/NoGun data was culled. The center frame is the original size; the left and right frames have been scaled by 110% and 90%, respectively. While these changes are barely perceptible, they double the error rate if normalization is not used. (Video courtesy of Dr. Ratanamahatana).