| CPC H04N 5/06 (2013.01) [H04N 23/11 (2023.01); H04N 23/611 (2023.01)] | 16 Claims |
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1. A motion capture system comprising:
a master clock configured to repeatedly generate and output, at a frame rate, a master clock signal that conveys when a video frame starts;
a first camera configured to capture light within a first set of wavelengths comprising visible light and operably coupled to receive the master clock signal and initiate an image capture sequence on a frame-by-frame basis in fixed phase relationship with the master clock signal to generate a first set of images at the frame rate from light captured within the first set of wavelengths;
a synchronization module operably coupled to receive the master clock signal from the master clock and configured to generate first and second synchronization signals that are offset in time from and in a fixed relationship with the master clock signal, wherein the first and synchronization signal is offset in time from the master clock signal by a different number of microseconds than the second synchronization signal; and
a second camera configured to capture light within a second set of wavelengths, different than the first set of wavelengths and comprising infrared light, and operably coupled to receive the first synchronization signal and initiate an image capture sequence on the frame-by-frame basis in a fixed phase relationship with the first synchronization signal to generate a second set of images at the frame rate from light captured within the second set of wavelengths;
wherein the amount of time the first synchronization signal is offset from the master clock signal aligns, within each frame, the image capture sequence of the second camera with the image capture sequence of the first camera; and
wherein the motion capture system further comprises an infrared light source and a driver coupled to the light source and operatively coupled to receive the second synchronization signal, wherein in response to the second synchronization signal, the driver turns the infrared light source ON and OFF to generate short pulses of light synchronized with the frame rate and in a fixed relationship with the second synchronization signal to align the pulses of light generated by the infrared light source with the image capture sequence of the second camera such that the infrared light source only projects light for a portion of each frame.
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