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impaginato corretto fullone_Layout 1 13/10/15 12.09 Pagina 61 Department of Engineering, ICT and Technologies for Energy and Transport Patent Title Title System and method for the measurement of the System and method for the measurement of the relative position of an object with respect to a point relative position of an object with respect to a point of reference. of reference. Ref. CNR 1445 Ref. CNR 1445 Assignee(s): CNR CNR Institute: ISSIA Main Inventor: Arcangelo Distante Countries: US Priority date: 29/01/2001 Abstract Abstract The invention refers to a system and a method for detecting the relative position of an object with The invention refers to a system and a method for detecting the relative position of an object with respect to a pre-defined reference point. The method consists of the following steps: 1) acquisition of respect to a pre defined reference point. The method consists of the following steps: 1) acquisition of sequences of images, each one containing the reference point; 2) image processing for the detection of sequences of images, each one containing the reference point; 2) image processing for the detection of the object; 3) computation of the relative position of the object with respect to the reference point. the object; 3) computation of the relative position of the object with respect to the reference point. The system includes one or more sub-systems for the acquisition of images and one computing unit for The system includes one or more sub systems for the acquisition of images and one computing unit for processing the images. processing the images. Background Background The invention is included in the field of technologies aimed to assist the referees in the objective evaluation The invention is included in the field of technologies aimed to assist the referees in the objective evaluation of dynamic events during sport matches; in particular, it refers to the detection of the relative position of a of dynamic events during sport matches; in particular, it refers to the detection of the relative position of a ball with respect to a line of the playground. ball with respect to a line of the playground. Technology Technology Cameras with high frame rate acquire images in real time during sport matches and send them to a Cameras with high frame rate acquire images in real time during sport matches and send them to a storage device; then, these images are processed in a computing unit. storage device; then, these images are processed in a computing unit. All the system hardware devices are at the state of the art and already available on the market. All the system hardware devices are at the state of the art and already available on the market. The system is ‘trained’ before the start of the match and, during the dynamic events, obtains and The system is ‘trained’ before the start of the match and, during the dynamic events, obtains and elaborates images in real time thanks to specifically developed algorithms. elaborates images in real time thanks to specifically developed algorithms. Advantages and Applicatons Advantages and Applications The main advantage of this invention is that no modification of playground and ball is required. The main advantage of this invention is that no modification of playground and ball is required. Furthermore, the detection of the dynamic events is robust and reliable because a geometric measure of Furthermore, the detection of the dynamic events is robust and reliable because a geometric measure of the tri-dimensional position of the ball is integrated with a qualitative measure of the observed event. So the tri dimensional position of the ball is integrated with a qualitative measure of the observed event. So the invention provides a high precision percentage and a very low error probability. the invention provides a high precision percentage and a very low error probability. Development stage Development stage The system has been successively updated and improved for the ghost-goal detection during the soccer The system has been successively updated and improved for the ghost goal detection during the soccer matches (ref. CNR 1731). matches (ref. CNR 1731). 61