Claims
- 1. An apparatus for inserting a watermark onto an illuminated image sequence, comprising:
a light modulator for modulating a light source; and a controller for controlling the light modulator such that a low frequency watermark is inserted onto the illuminated image sequence.
- 2. The apparatus of claim 1, wherein the controller selects an appropriate modulation based on a previous profiling stage.
- 3. The apparatus of claim 1, wherein the controller receives feedback from a projector or printer in order to maintain temporal registration.
- 4. The apparatus of claim 1, wherein the controller receives feedback from projector or printer in order to maintain spatial registration.
- 5. The apparatus of claim 1, wherein the controller receives feedback from projector or printer in order to maintain spatio-temporal registration.
- 6. The apparatus of claim 1, wherein said light modulator is a slit modulator.
- 7. The apparatus of claim 1, wherein the low frequency watermark is inserted onto the illuminated image sequence using a serial configuration.
- 8. The apparatus of claim 7, wherein the low frequency watermark comprises a positive luminance excursion watermark.
- 9. The apparatus of claim 7, wherein the low frequency watermark comprises a negative luminance excursion watermark.
- 10. The apparatus of claim 7, wherein the low frequency watermark comprises positive luminance excursion watermarks and negative luminance excursion watermarks.
- 11. The apparatus of claim 7, wherein the light modulator is maintained at a distance from the film plane sufficient to cause appropriate levels of blur in the low frequency watermark.
- 12. The apparatus of claim 1, wherein the low frequency watermark is inserted onto the illuminated image sequence using a parallel configuration.
- 13. The apparatus of claim 12, wherein the low frequency watermark comprises a positive luminance excursion watermark.
- 14. The apparatus of claim 1, wherein the low frequency watermark is inserted onto the illuminated image sequence using a serial configuration and a parallel configuration.
- 15. The apparatus of claim 14, wherein the low frequency watermark comprises negative luminance excursion watermarks and positive luminance excursion watermarks.
- 16. An apparatus for inserting a watermark, comprising:
a light source for illuminating an image sequence; a lens for modifying the light from the light source; a light modulator for modulating the modified light; and a controller for controlling the light modulator such that a low frequency watermark is inserted onto the illuminated image sequence.
- 17. The apparatus of claim 16, further comprising:
an illuminated image sequence.
- 18. An apparatus for inserting a watermark, comprising:
a first light source for illuminating an image sequence; a first lens for modifying the light from the first light source; a first light modulator for modulating the modified light from the first light source; a second light source; a second lens for modifying the light from the second light source; a second light modulator for modulating the modified light from the second light source; and a controller for controlling the first light modulator and the second light modulator such that a low frequency watermark is inserted onto the illuminated image sequence.
- 19. A method for inserting a watermark onto an illuminated image sequence, comprising:
modulating a light source with a light modulator; and controlling the light modulator such that a low frequency watermark is inserted onto the illuminated image sequence.
- 20. The method of claim 19, further comprising selecting an appropriate modulation based on a previous profiling stage.
- 21. The method of claim 19, further comprising receiving feedback from a projector or printer in order to maintain temporal registration.
- 22. The method of claim 19, further comprising receiving feedback from a projector or printer in order to maintain spatial registration.
- 23. The method of claim 19, further comprising receiving feedback from a projector or printer in order to maintain spatio-temporal registration.
- 24. The method of claim 19, wherein said light modulator is a slit modulator.
- 25. The method of claim 19, further comprising inserting the low frequency watermark onto the illuminated image sequence using a serial configuration.
- 26. The method of claim 25, wherein the low frequency watermark comprises a positive luminance excursion watermark.
- 27. The method of claim 25, wherein the low frequency watermark comprises a negative luminance excursion watermark.
- 28. The method of claim 25, wherein the low frequency watermark comprises positive and negative luminance excursion watermarks.
- 29. The method of claim 19, wherein the light modulator is maintained at a distance from the film plane sufficient to cause appropriate levels of blur in the low frequency watermark.
- 30. The method of claim 19, further comprising inserting the low frequency watermark onto the illuminated image sequence using a parallel configuration.
- 31. The method of claim 19, wherein the low frequency watermark comprises a positive luminance excursion watermark.
- 32. The method of claim 19, further comprising inserting the low frequency watermark onto the illuminated image sequence using a serial configuration and a parallel configuration.
- 33. The method of claim 32, wherein the low frequency watermark comprises negative luminance excursion watermarks and positive luminance excursion watermarks.
CROSS-REFERENCE TO RELATED APPLICATIONS
[0001] This application claims benefit of U.S. provisional patent application Ser. No. 60/474,900, filed May 29, 2003, which is herein incorporated by reference.
Provisional Applications (1)
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Number |
Date |
Country |
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60474900 |
May 2003 |
US |