| 摘要 |
A method and an apparatus are described for determining parameters of a contact between bodies occurring within an activity, particularly within a sporting, game, s recreational or entertainment activity, such as contact of a cricket ball or baseball with the bat. A digital camera directed towards a target area during the course of the activity captures image data in the infra red region of the spectrum. Means for comparing image data for multiple temporally spaced frames with image data of a reference datum records any localised infra red emission appearing in at least one incident frame, such localised 10 infra red emission being indicative of heat having been generated by a contact which has occurred in the target area and which has generated heat, such as by friction between the bodies or deformation of at least one of the bodies involved in the contact. The image data for at least one of the incident frames is analysed to determine at least one parameter of the contact, and the image data for the incident frame is recorded. Visual display 15 means displays the incident frames including the image data in the IR spectrum by presenting IR data as a visible display of the scene captured for the incident frame so as to enable visual inspection of the activity in the target area at the time of the at least one incident frame and that gave rise to the contact producing the infra red emission. 1/+ VISUAL MEANS Fig. I |
