Information processor and information processing method for performing process adapted to user motion

An information processing method comprising:

• capturing the motion of a user provided with a marker as a moving image;
• estimating the contour of the user in each image frame by defining a candidate curve representing the contour of the user in an image frame included in the moving image captured by the imaging device based on the contour of the user estimated in an image frame at a previous time step, and by observing the likelihood of each candidate curve;
• successively storing in a memory the relative position, in each image frame, of an image of the marker in relation to the estimated contour of the user;
• determining whether an action is performed by checking a time-dependent change in the relative position read from the memory against a criteria established for the action;
• and
• performing, when the action is determined as being performed, a process corresponding to the action and generating output data.

A computer program embedded on a non-transitory computer readable storage medium for causing a computer to process data for a moving image capturing a user provided with a marker as input data, comprising:

• a module adapted to estimate the contour of the user in each image frame by defining a candidate curve representing the contour of the user in an image frame included in the moving image based on the contour of the user estimated in an image frame at a previous time step, and by observing the likelihood of each candidate curve;
• a module adapted to successively store in a memory the relative position, in each image frame, of an image of the marker in relation to the estimated contour of the user;
• a module adapted to determine whether an action is performed by checking a time-dependent change in the relative position read from the memory against a criteria established for the action;
• and
• a module adapted to perform, when the action is determined as being performed, a process corresponding to the action and generate output data.

A non-transitory computer readable storage medium embodying a computer program for causing a computer to process data for a moving image capturing a user provided with a marker as input data, the program comprising:

• a module adapted to estimate the contour of the user in each image frame by defining a candidate curve representing the contour of the user in an image frame included in the moving image based on the contour of the user estimated in an image frame at a previous time step, and by observing the likelihood of each candidate curve;
• a module adapted to successively store in a memory the relative position, in each image frame, of an image of the marker in relation to the estimated contour of the user;
• a module adapted to determine whether an action is performed by checking a time-dependent change in the relative position read from the memory against a criteria established for the action;
• and
• a module adapted to perform, when the action is determined as being performed, a process corresponding to the action and generate output data.