System and method for performing motion capture using phosphor application techniques
View Patent ↗A system and method are described for performing motion capture on a subject. For example, a method according to one embodiment of the invention comprises: mixing phosphorescent makeup with a makeup base; applying the mixture of phosphorescent makeup and makeup base to surface regions of a motion capture subject; strobing a light source on and off, the light source charging phosphor within the phosphorescent makeup when on; and strobing the shutters of a first plurality of cameras synchronously with the strobing of the light source to capture images of the phosphorescent makeup, wherein the shutters are open when the light source is off and the shutters are closed when the light source is on.
1. A method for performing motion capture comprising:
mixing phosphor with makeup to create a phosphor-makeup mixture;
applying the phosphor-makeup mixture to surface regions of a motion capture subject;
strobing a light source on and off, the light source charging phosphor within the phosphor-makeup mixture when on; and
strobing the shutters of a first plurality of cameras synchronously with the strobing of the light source to capture sequences of images of the phosphor-makeup mixture as the subject moves or changes facial expressions during a performance, wherein the shutters are open when the light source is off and the shutters are closed when the light source is on.
2. The method as in claim 1 wherein the subject is a performer's face and/or body.
3. The method as in claim 1 wherein the subject is a fabric.
4. The method as in claim 1 wherein the phosphor-makeup mixture is applied in a random pattern.
5. The method as in claim 1 wherein the subject is a performer's face and the phosphor-makeup mixture is applied as a series of curves on the subject.
6. The method as in claim 1 further comprising:
tracking the motion of the phosphor within the phosphor-makeup mixture over time; and
generating motion data representing the movement of the subject's face and/or body using the tracked movement of the phosphor within the phosphor-makeup mixture.
7. The method as in claim 1 further comprising:
strobing the shutters of a second plurality of cameras synchronously with the strobing of the light source to capture sequences of lit images of the subject, as the subject moves or changes facial expressions during a performance, wherein the shutters of the second plurality of cameras are open to capture the lit images when the light source is on and the shutters of the second plurality of cameras are closed when the light source is off.
8. The method as in claim 7 wherein the first plurality of cameras are grayscale cameras and the second plurality of cameras are color cameras.
9. The method as in claim 1 wherein the phosphor within the phosphor-makeup mixture comprises ZnS:Cu.
10. The method as in claim 1 wherein the phosphor within the phosphor-makeup mixture comprises SrAl2O4:Eu 2+ , Dy 3+ .
11. The method as in claim 1 wherein the phosphor within the phosphor-makeup mixture comprises SrAl 2 O 4 :Eu 2+ .
12. The method as in claim 1 wherein the light source comprises one or more fluorescent lamps.
13. The method as in claim 12 wherein the fluorescent lamps are illuminated by a set of circuits comprising:
a ballast circuit electrically coupled to a power source and to at least one of the one or more fluorescent lamps, the ballast circuit configured to provide power to the fluorescent lamp to turn the fluorescent lamp on; and
a synchronization control circuit electrically coupled to a synchronization signal generator and to the ballast circuit, the synchronization control circuit to receive a synchronization signal from the synchronization signal generator and to responsively cause the ballast circuit to turn the fluorescent lamp on and off.
14. A method for performing motion capture of a fabric comprising:
mixing phosphor with dye to create a phosphor-dye mixture;
applying the phosphor-dye mixture to surface regions of a fabric;
strobing a light source on and off, the light source charging phosphor within the phosphor-dye mixture when on; and
strobing the shutters of a first plurality of cameras synchronously with the strobing of the light source to capture sequences of images of the phosphor-dye mixture as the fabric is moved during a motion capture performance, wherein the shutters are open when the light source is off to capture the sequences of images of the phosphor-dye mixture and the shutters are closed when the light source is on.
15. The method as in claim 14 wherein the phosphor-dye mixture is applied in a random pattern.
16. The method as in claim 14 wherein the phosphor-dye mixture is applied in a random pattern.
17. The method as in claim 14 further comprising:
tracking the motion of the phosphor within the phosphor-dye mixture over time; and
generating motion data representing the movement of the phosphor-dye mixture.
18. The method as in claim 14 further comprising:
strobing the shutters of a second plurality of cameras synchronously with the strobing of the light source to capture sequences of lit images of the fabric, as the fabric is moved over time during a performance, wherein the shutters of the second plurality of cameras are open to capture the lit images of the fabric when the light source is on and the shutters of the second plurality of cameras are closed when the light source is off.
19. The method as in claim 18 wherein the first plurality of cameras are grayscale cameras and the second plurality of cameras are color cameras.
20. The method as in claim 14 wherein the phosphor within the phosphor-dye mixture comprises ZnS:Cu.
21. The method as in claim 14 wherein the phosphor within the phosphor-dye mixture comprises SrAl2O4:Eu 2+ , Dy 3+ .
22. The method as in claim 14 wherein the phosphor within the phosphor-dye mixture comprises SrAl 2 O 4 :Eu 2+ .
23. The method as in claim 14 wherein the light source comprises one or more fluorescent lamps.
24. The method as in claim 23 wherein the fluorescent lamps are illuminated by a set of circuits comprising:
a ballast circuit electrically coupled to a power source and to at least one of the one or more fluorescent lamps, the ballast circuit configured to provide power to the fluorescent lamp to turn the fluorescent lamp on; and
a synchronization control circuit electrically coupled to a synchronization signal generator and to the ballast circuit, the synchronization control circuit to receive a synchronization signal from the synchronization signal generator and to responsively cause the ballast circuit to turn the fluorescent lamp on and off.