Computerized percussion instrument

摘要

A computerized musical percussion instrument is disclosed.;Markers carried by the musician are observed by an imager to produce a series of two dimensional images over the time of the performance.;A processor receives the images and distinguishes between markers (e.g. left hand, right hand) by comparing the position and size of unidentified markers in the current image to the position and size of identified markers in preceding images.;The processor analyzes each markers' movements and detects a drum hit when a marker undergoes a sharp reversal of its motion direction after reaching sufficient speed. The processor determines which drum the musician intends to hit by comparing the position and size of the marker at the instant of the hit to the position and size attributes of each drum. The processor outputs an audio signal for each hit, corresponding to the drum hit, with a volume determined by marker speed.

主权项

1. A musical instrument comprising
an imager arranged to provide a series of two dimensional images of an operator of the musical instrument; a processor, coupled to the imager to receive the images, the processor configured to:
store an indication of a size and/or position of a first marker in a first selected image of the series of two dimensional images;store an indication of a size and/or position of a second marker in the first selected image of the series of two dimensional images;use the stored indication of the size and/or position of the first marker and the stored indication of the size and/or position of the second marker in the first selected image of the series of two dimensional images to distinguish between the first marker and the second marker in a second selected image of the series of two dimensional images independent of the proximity of the first marker relative to the second marker based on at least:
the size and/or position of the first marker and the size and/or position of the second marker in the second selected image of the series of two dimensional images, andthe size and/or position of the first marker and the size and/or position of the second marker in at least one preceding image of the series of two dimensional images that was captured before the first selected image of the series of two dimensional images and the second selected image of the series of two dimensional images; andtrigger an audio output signal based on at least one of:
the size and/or position of the first marker,the size and/or position of the second marker,movements of the first marker, andmovements of the second marker.