Adjustment for irregular sensor movement during spectral imaging

• US 9,784,615 B1
• Filed: 11/28/2016
• Issued: 10/10/2017
• Est. Priority Date: 10/14/2016
• Status: Active Grant

• Current Assignee: BaySpec, Inc. (II-VI Incorporated)
• Original Assignee: BaySpec, Inc. (II-VI Incorporated)
• Inventors: Shu, Guocai, Zhang, Shu, Yang, William
• Primary Examiner(s): Nur, Abdullahi
• Application Number:
  US15/362,108
• Time in Patent Office: 316 Days
• CPC Class Codes: G01J 2003/283 computer-interfaced
• CPC Class Codes: G01J 3/0248 using a sighting port, e.g. camera or human eye
• CPC Class Codes: G01J 3/0289 Field-of-view determination; Aiming or pointing of a spectrometer; Adjusting alignment; Encoding angular position; Size of measurement area; Position tracking
• CPC Class Codes: G01J 3/0294 Multi-channel spectroscopy
• CPC Class Codes: G01J 3/2803 using photoelectric array detector
• CPC Class Codes: G01J 3/2823 Imaging spectrometer

Abstract

Systems for adjusting for irregular movement during spectral imaging are provided herein. Exemplary systems include: a spectrograph measuring a plurality of spectrographic data sets; a camera capturing images, a processor communicatively coupled to the spectrograph and the camera; and a memory coupled to the processor, the memory storing instructions executable by the processor to perform a method comprising: receiving a plurality of spectrographs for a series of respective locations and the images corresponding to the respective locations; generating a continuous image using the images; identifying a respective corresponding position in the continuous image for each spectrograph, such that each spectrograph is a measurement of the respective position; and associating each spectrograph with the respective position.

Claims

1. A system for adjusting for irregular movement during spectral imaging comprising:

a spectrometer measuring a plurality of spectrographic data sets;

a camera capturing images, the camera being coupled to the spectrometer such that the spectrometer and the camera move in tandem and at least partially share the same point of view, the spectrometer and the camera being synchronized;

a processor communicatively coupled to the spectrometer and the camera; and

a memory coupled to the processor, the memory storing instructions executable by the processor to perform a method comprising;

receiving a plurality of spectrographs for a series of respective locations and the images corresponding to the respective locations, each spectrograph of the plurality of spectrographs being produced using a spectrographic data set of the plurality of spectrographic data sets, each of the plurality of spectrographic data sets being measured by the spectrometer and each of the corresponding images being captured by the camera at substantially the same time;

generating a continuous image using the images;

identifying a respective corresponding position in the continuous image for the each spectrograph, such that the each spectrograph is a measurement of the respective position; and

associating the each spectrograph with the respective position.

2. The system of claim 1, wherein the spectrometer and the camera are disposed in a vehicle such that the spectrometer and the camera point in the same direction, the vehicle being in motion when at least some of the spectrographic data sets and the corresponding images are captured.

3. The system of claim 1, wherein the method further comprises:

getting the plurality of spectrographic data sets;

creating the each spectrograph using a respective spectrographic data set of the plurality of spectrographic data sets; and

associating the each spectrograph with the position associated with the respective spectrographic data set.

4. The system of claim 1, wherein the method further comprises:

providing the continuous image to a user;

getting an indication from the user of a particular position in the continuous image; and

determining and providing a spectrograph associated with the particular position.

5. The system of claim 1, wherein the generating the continuous image includes global feature matching among the images and assigning coordinates to each of the images using a coordinate system.

6. The system of claim 5, wherein the identifying the respective corresponding position for the each spectrograph uses the coordinates assigned to the corresponding image.

7. The system of claim 1, wherein the spectrometer measures wavelengths in at least one of the visible spectrum, visible to near-infrared, short-wave infrared, and infrared.

8. The system of claim 1, wherein the each of the corresponding images is taken from a different place than an adjacent image of the corresponding images.

9. The system of claim 8, wherein the each of the corresponding images overlaps with the adjacent image of the corresponding images by at least 20%.

10. The system of claim 1, wherein the camera is a digital camera having a lens, the lens having a focal length in the range of 8 mm to 200 mm.

11. A system for compensating for irregular motion in three-dimensional spectroscopy comprising:

a spectrometer measuring a plurality of spectrographic data sets;

a camera capturing images, the camera being coupled to the spectrometer such that the spectrometer and the camera move in tandem and at least partially share the same point of view, the spectrometer and the camera being synchronized;

a processor communicatively coupled to the spectrometer and the camera; and

a memory coupled to the processor, the memory storing instructions executable by the processor to perform a method comprising;

receiving the plurality of spectrographic data sets for a series of respective locations and the images corresponding to the respective locations, each of the plurality of spectrographic data sets being measured by the spectrometer and each of the corresponding images being captured by the camera at substantially the same time;

generating a continuous image using the received images;

identifying a respective corresponding position in the continuous image for each spectrographic data set, such that the each spectrographic data set is a measurement of the respective position; and

associating the each spectrographic data set with the respective position.

12. The system of claim 11, wherein the spectrometer and the camera are disposed in a vehicle such that the spectrometer and the camera point in the same direction, the vehicle being in motion when at least some of the spectrographic data sets are measured and the corresponding images are captured.

13. The system of claim 11, wherein the method further comprises:

creating each spectrograph of a plurality of spectrographs using a respective spectrographic data set of the plurality of spectrographic data sets; and

associating the each spectrograph with the position associated with the respective spectrographic data set.

14. The system of claim 13, wherein the method further comprises:

providing the continuous image to a user;

getting an indication from the user of a particular position in the continuous image; and

determining and providing a spectrograph associated with the particular position.

15. The system of claim 11, wherein the generating the continuous image includes global feature matching among the images and assigning coordinates to each of the images using a coordinate system.

16. The system of claim 15, wherein the identifying the respective corresponding position for the each spectrographic data set uses the coordinates assigned to the corresponding image.

17. The system of claim 11, wherein the spectrometer measures wavelengths in at least one of the visible spectrum, visible to near-infrared, short-wave infrared, and infrared.

18. The system of claim 11, wherein the each of the corresponding images is taken from a different place than an adjacent image of the corresponding images.

19. The system of claim 18, wherein the each of the corresponding images overlaps with the adjacent image of the corresponding images by at least 20%.

20. The system of claim 11, wherein the camera is a digital camera having a lens, the lens having a focal length in the range of 8 mm to 200 mm.