N-dimensional data encoding of projected or reflected data

• US 6,690,762 B1
• Filed: 02/28/2001
• Issued: 02/10/2004
• Est. Priority Date: 02/28/2001
• Status: Expired due to Fees

• Current Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Original Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Inventors: Berestov, Alexander L.
• Primary Examiner(s): Bella, Matthew C.
• Assistant Examiner(s): McCartney, Linzy
• Application Number:
  US09/796,668
• Time in Patent Office: 1,077 Days
• Field of Search: 348/113, 707/101, 345/426, 430/22, 378/901, 378/62, 378/4, 382/128, 382/132
• US Class Current: 378/62
• CPC Class Codes: G01N 2223/419 computed tomograph
• CPC Class Codes: G01N 23/046 using tomography, e.g. computed tomography [CT]
• CPC Class Codes: Y10S 378/901 Computer tomography program or processor

Abstract

A system, method, and computer-readable medium formats imaging data associated with an object in an n-dimensional file format. Once two-dimensional imaging ray data (projected or reflected data) is acquired, it is saved into an n-dimensional format (500) along with data describing the reference point and focal point of the image. A preferred format (500) comprises a file header (505), a header of the reference point, coordinates of the focal point field, a transformation field, and dimension sub-headers (550, 560). The system comprises a data acquisition module (612), a data storage module (630), a data reading module (640), and a data processing module (610) for formatting the data, reading the formatted data, and fusing the formatted data with other data sets, such as three-dimensional data.

Claims

1. A computer implemented method for storing formatted image data corresponding to a projected image of an object, wherein said projected image is obtained by projecting x-rays from an x-ray source through the object to a sensor which records the projected image, said method comprising the steps of:

formatting the image data by providing a file header, a reference point value field which defines the location of the sensor, and a focal point value field which defines the location of x-ray emission from the x-ray source, and

storing the formatted image data to a storage medium accessible by a computer.

2. The method of claim 1, wherein the format further comprises:

a transformation field, and a type of the coordinate system.

3. The method of claim 1, wherein coordinates of the focal point are stored in a local coordinate system.

4. The method of claim 1, wherein the format includes at least two dimensions for storing image data.

5. The method of claim 1, further comprising the steps of:

acquiring second image data of the object;

formatting the second data; and

fusing the first and second image data into a three-dimensional image of the object, based on respective values of the reference point value fields and the focal point value fields.

6. The method of claim 5, wherein the step of fusing the first and second data sets includes the step of:

forming a depth map for the data image data.

7. The method of claim 1, wherein the second image data is reflected image data of the object.

8. The method of claim 4, further comprising a reference point value field and a focal point value field for data of each dimension.

9. A computer apparatus for formatting, image data corresponding to a projected image of an object, wherein aid projected image is obtained by projecting x-rays from an x-ray source through the object to a sensor which records the projected image, the computer apparatus comprising:

a central processing unit (CPU); and

a memory unit storing code executed by the CPU, said memory unit storing code comprising;

a formatting module configured to format the image data by providing a filer header, a reference point value field which defines the location of the sensor, and a focal point field which defines the location of x-ray emission from the x-ray source; and

a storage module in communication with the formatting module and configured to store the formatted image data.

10. The computer apparatus of claim 9, wherein the formatting module is configured for formatting second image data of the same object, wherein the second image is reflected image data of the object.

11. The computer apparatus of claim 10, further comprising a fusing module for fusing the first and second image data.

12. The computer apparatus of claim 9, wherein the format includes at least two dimensions for storing image data.

13. The computer apparatus of claim 9, wherein the formatting module further provides a header of the reference point, and a header of the focal point.

14. The computer apparatus of claim 9, wherein the image data is described using a non-Cartesian coordinate system.

15. The computer apparatus of claim 9, wherein the image data is described using a Cartesian coordinate system.

16. A computer-readable medium containing a computer program for formatting image data corresponding to a projected image of an object, wherein said projected image is obtained by projecting x-rays from an x-ray source through the object to a sensor which records the projected image, the computer program comprising:

executable code stored in a memory unit;

a formatting module configured to format the image data by providing a file header, a reference point value field which defines the location of the sensor, and a focal point value field which defines the location of x-ray emission from the x-ray source; and

a storage module in communication with the formatting module and configured to store the formatted image data.

17. The computer readable medium of claim 16, wherein the formatting module configured to format second image data into a compatible file structure, whereby the first and second image data may be fused.

18. The computer readable medium of claim 16, wherein the format further comprises a transformation field and a type of the coordinate system field.

19. The computer readable medium of claim 16, wherein the format further comprises at least two dimensions for storing two-dimensional image data.