Claims
- 1. A system for processing image data representing biometric data, comprising:
a receiving module for receiving image data captured in a first coordinate system; and a coordinate conversion module coupled to the receiving module for converting the image data captured in the first coordinate system to converted image data in a second coordinate system.
- 2. The system of claim 1 further comprising a memory coupled to the coordinate conversion module.
- 3. The system of claim 1 wherein the second coordinate system is a rectangular coordinate system.
- 4. The system of claim 2 wherein the first coordinate system is a polar coordinate system.
- 5. The system of claim 1 further comprising a scanning and capturing system coupled to the receiving module wherein the scanning and capturing system comprises:
a non-planar prism; and a scanning imaging system optically coupled to the non-planar prism for capturing image data in a first coordinate system and for communicating the image data to the receiving module.
- 6. The system of claim 4 wherein the scanning and capturing system is coupled to the receiving module via a data network.
- 7. The system of claim 5 wherein the second coordinate system is a rectangular coordinate system.
- 8. The system of claim 7 wherein the first coordinate system is a polar coordinate system.
- 9. A system for processing image data representing biometric data, comprising:
a non-planar prism; a scanning imaging system optically coupled to the non-planar prism for capturing the image data in a first coordinate system; and an image conversion system coupled to the scanning imaging system for converting the image data captured in the first coordinate system to converted image data in a second coordinate system.
- 10. The system of claim 9 wherein the image conversion system includes:
a receiving module for receiving image data captured in a first coordinate system; and a coordinate conversion module coupled to the receiving module for converting the image data captured in the first coordinate system to converted image data in a second coordinate system.
- 11. The system of claim 10 wherein the image conversion system further comprises a memory coupled to the coordinate conversion module.
- 12. The system of claim 11 wherein the second coordinate system is a rectangular coordinate system.
- 13. The system of claim 12 wherein the first coordinate system is a polar coordinate system.
- 14. The system of claim 11 wherein the non-planar prism is a conical prism.
- 15. A system for processing image data representing biometric data, comprising:
a biometric imaging system comprising:
a non-planar prism, an scanning imaging system optically coupled to the non-planar prism for capturing the image data in a first coordinate system, and a first image conversion system coupled to the scanning imaging system for generating and storing conversion data; and a second image conversion system coupled to the biometric imaging system for converting the image data captured in the first coordinate system to converted image data in a second coordinate system.
- 16. The system of claim 15 wherein the first image conversion system includes:
a receiving module for receiving image data captured in a first coordinate system; and a coordinate conversion module coupled to the receiving module for converting the image data captured in the first coordinate system to converted image data in a second coordinate system.
- 17. The system of claim 16 wherein the second image conversion system includes:
a receiving module for receiving image data captured in a first coordinate system; and a coordinate conversion module coupled to the receiving module for converting the image data captured in the first coordinate system to converted image data in a second coordinate system.
- 18. The system of claim 15 wherein the second coordinate system is a rectangular coordinate system.
- 19. The system of claim 18 wherein the first coordinate system is a polar coordinate system.
- 20. A system for processing image data representing biometric data, comprising:
means for converting image data captured in a first coordinate system to converted image data in a second coordinate system.
- 21. The system of claim 20 wherein the second coordinate system is a rectangular coordinate system.
- 22. The system of claim 21 wherein the first coordinate system is a polar coordinate system.
- 23. A method for processing image data representing biometric data comprising:
receiving the image data captured in a first coordinate system and storing the captured image data; and converting the captured image data in the first coordinate system to converted image data in a second coordinate system.
- 24. The method of claim 23, wherein the converting comprises using a rectangular coordinate system as the second coordinate system.
- 25. The method of claim 24, wherein the first coordinate system is a polar coordinate system.
- 26. The method of claim 23, further comprising:
generating and storing a conversion data array including coordinate and offset data.
- 27. The method of claim 23, further comprising:
prior to receiving captured image data, receiving criteria associated with specifications for processing the captured image data; and generating and storing at least conversion data array corresponding to the received criteria.
- 28. The method of claim 27 further comprising generating and storing at least one conversion parameter corresponding to the received criteria.
- 29. The method of claim 27 wherein one of the at least one conversion parameter includes a parameter indicating the interpolation method.
- 30. The method of claim 27 wherein each of the at least one conversion data array is generated dynamically.
- 31. The method of claim 23, wherein said converting comprises:
for each pixel in an output rectangular area, the steps of: performing a look up to obtain conversion data including the coordinate data and the offset data associated with respective pixel coordinates; retrieving at least one sample of stored captured image data; and interpolating each retrieved sample with weighting based on the looked up offset data to obtain a respective pixel value in the second coordinate system.
- 32. A method for processing image data representing biometric data in a system having a scanning and capturing system and an image conversion system, comprising:
generating and storing conversion data in the image conversion system; capturing in the scanning and capturing system the image data in a first coordinate system; communicating the captured first coordinate system image data to the image conversion system; and converting the captured first coordinate system image data to converted image data in a second coordinate system.
- 33. The method of claim 32, wherein the capturing comprises using a polar coordinate system as the first coordinate system.
- 34. The method of claim 33, wherein the converting comprises using a rectangular coordinate system as the second coordinate system.
- 35. The method of claim 32, wherein said converting comprises:
for each pixel in an output rectangular area, the steps of: performing a look up in a conversion data array to obtain conversion data including the coordinate data and the offset data associated with respective pixel coordinates; retrieving at least one sample of stored captured image data; and interpolating each retrieved sample with weighting based on the looked up offset data to obtain a respective pixel value in the second coordinate system.
- 36. The method of claim 35 wherein the step of interpolating each retrieved sample includes calculating the weighting.
- 37. The method of claim 35 wherein the step of interpolating each retrieved sample includes performing a look up to determine the weighting.
- 38. A method for processing image data representing biometric data comprising:
capturing the image data in a first coordinate system; and converting the captured image data in the first coordinate system to converted image data in a second coordinate system.
- 39. The method of claim 38, wherein the capturing comprises using a polar coordinate system as the first coordinate system.
- 40. The method of claim 38, wherein the converting comprises using a rectangular coordinate system as the second coordinate system.
- 41. The method of claim 40, further comprising:
generating and storing conversion data including polar coordinate and polar offset data.
- 42. The method of claim 41, wherein said converting comprises:
for each pixel in an output rectangular area, the steps of: performing a look up to obtain conversion data including the polar coordinate data and the offset data associated with respective pixel coordinates; retrieving at least one sample of stored polar space image data; and interpolating each retrieved sample with weighting based on the looked up polar offset data to obtain a respective pixel value in rectangular image space.
CROSS-REFERENCE TO RELATED APPLICATIONS
[0001] This application claims the benefit of U.S. Provisional Application No. 60/431,240, filed Dec. 6, 2002 and U.S. Provisional Application No. 60/491,537, filed Aug. 1, 2003, both of which are incorporated herein by reference in their entireties.
Provisional Applications (2)
|
Number |
Date |
Country |
|
60431240 |
Dec 2002 |
US |
|
60491537 |
Aug 2003 |
US |