Computerized percussion instrument
First Claim
1. A musical instrument comprisingan 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; and
trigger 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.
1 Assignment
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Accused Products
Abstract
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.
5 Citations
20 Claims
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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, and the 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; and trigger 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, and movements of the second marker. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 19)
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11. A computer implemented method of processing images to control audio signals so as to simulate a musical instrument, the method comprising:
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receiving a series of two dimensional images of an operator of the musical instrument; storing an indication of a size and/or position of a first marker in a first selected image of the series of two dimensional images; storing an indication of a size and/or position of a second marker in the first selected image of the series of two dimensional images; using 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, and the 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; and triggering 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, and movements of the second marker. - View Dependent Claims (12, 13, 14, 15, 16, 17, 20)
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18. A kit for adapting a computer to provide a musical instrument, the kit comprising:
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a wide angle lens adapter for a digital camera; at least one retro-reflector to be carried by a user; and a lamp, coupled to the wide angle lens adapter so as to illuminate the wide angle lens adapter by reflecting light from the retro-reflector when, in use, the retro-reflector is arranged to direct light towards the wide angle lens adapter; a computer program product storing program instructions for causing a processor to perform a method that comprises; receiving a series of two dimensional images of an operator of the musical instrument; storing an indication of a size and/or position of a first marker in a first selected image of the series of two dimensional images; storing an indication of a size and/or position of a second marker in the first selected image of the series of two dimensional images; using the stored indication of the size and/or position of the first marker and the stored indication 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, and the 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; and triggering 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, and movements of the second marker.
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Specification