Patent ID: 7447336
Filing Date: 2008-11-04
Classification: A63B,G06K,G06T

Abstract:
1. A stroke information measurement device comprising: image pickup means for capturing image of a swimming swimmer and outputting the image data of predetermined intervals; front end detection means for detecting a front end in the direction of progress of said swimmer from an image of the body of said swimmer in each of said image data; and stroke point detection means for detecting, from among said front ends, the front end at the timing when said swimmer is in a predetermined position in each stroke wherein said front end detection means comprises: discrimination means for discriminating, from within each image data output from said image pickup means, pixels that are to be candidates of said image of the body based on at least one of hue, saturation and value; and elimination means for computing the perimeter of each area formed by said pixels to be candidates of the image of the body being adjacent to each other, and eliminating the area, perimeter of which is no more than a predetermined perimeter, as noise.