Retinal vasculature image acquisition apparatus and method

• US 6,766,041 B2
• Filed: 01/03/2001
• Issued: 07/20/2004
• Est. Priority Date: 07/09/1998
• Status: Expired due to Term

• Current Assignee: Optibrand Ltd. LLC
• Original Assignee: Colorado State University Research Foundation
• Inventors: Golden, Bruce L., Rollin, Bernard E., Comstock, Carlton R. Jr., Switzer, Ralph v. Jr.
• Primary Examiner(s): WERNER, BRIAN P
• Application Number:
  US09/753,973
• Publication Number:
  US 20030048929A1
• Time in Patent Office: 1,294 Days
• Field of Search: 382/115, 382/116, 382/117, 382/110, 356/71, 340/5.52, 340/5.82, 340/5.53, 340/5.83, 340/573.2
• US Class Current: 382/117
• CPC Class Codes: A01K 11/008 incorporating GPS
• CPC Class Codes: A61B 3/145 by video means
• CPC Class Codes: A61B 5/1171 based on the shapes or appearances of their bodies or parts thereof
• CPC Class Codes: A61B 5/411 Detecting or monitoring allergy or intolerance reactions to an allergenic agent or substance
• CPC Class Codes: G06V 40/14 Vascular patterns
• CPC Class Codes: G06V 40/18 Eye characteristics, e.g. of the iris

Abstract

The present invention creates a permanent record of an animal through a series of steps including, preliminarily acquiring an image of the retinal vasculature of the animal of interest; digitizing that image if the image is not a digital image; analyzing the image to determine if the image is satisfactory for further analysis; storing the image; and analyzing the image for unique anatomical landmarks. The image and data gathered therefrom may be stored in a database for later retrieval and comparison against other images. The data gathered from the image may be compared against other stored data in the database to determine the identity of the animal. Preferably, the system would also include a global positioning system (“GPS”) device which would simultaneously time and date stamp the acquired image as well as stamp the image with the location where the imaging took place by recording the latitude and longitude of that location.

Claims

1. A method of creating an identification record for a non-human animal, the method comprising:

using a camera and a non-scanning illumination source, acquiring an image of at least a portion of an ocular fundus of the animal,

using a microprocessor, extracting a set of analysis data from the acquired image representing a particular identified anatomical structure of the ocular fundus,

generating information indicative of day and geographic location of the image acquisition, and

generating the identification record to comprise at least the analysis data and the information.

2. The method of claim 1, wherein the step of acquiring an image comprises capturing the image with the camera, digitizing the image for storage, transmitting the digitized image to a computer, and the anatomical structure so represented is retinal vasculature.

3. The method of claim 1, wherein the step of extracting a set of analysis data comprises identifying and selecting the particular structure from the group of structures consisting of at least a portion of retinal vasculature and an optic disk, and characterizing sections of the acquired image that are located in a predetermined configuration relative to the identified anatomical structure;

and the step of generating information further comprises receiving data with a Global Positioning System (GPS) receiver comprising the location and a time the image was so acquired.

4. The method of claim 1, wherein the step of extracting a set of analysis data further comprises rotating the acquired image so that the structure lies in a predetermined orientation.

5. The method of claim 4, wherein the step of extracting a set of analysis data further comprises:

sampling a plurality of sections of the acquired image that lie in predetermined locations relative to the structure,

detecting a plurality of light-dark-light transitions within each of the sections, and

identifying a coordinate location of each of the light-dark-light transitions so detected.

6. The method of claim 5, wherein each of the sections comprises a slice having a width and the step of extracting a set of analysis data further comprises storing a set of spatial coordinates for each of the transitions in a linked list, normalizing the acquired image comprising detecting an axis of the structure in a common dimension of the slices.

7. The method of claim 6, wherein the step of normalizing the acquired image further comprises, once the axis is detected, rotating the structure until a plane is identified that comprises a maximum total number of the transitions, whereby if a predetermined minimum threshold number of the transitions in the identified plane is met, the spatial coordinates representing the structure in the identified plane, is selected.

8. The method of claim 1, wherein the anatomical structure so represented is retinal vasculature, the identification record further comprises a time the image was so acquired, and the step of generating information further comprises receiving data comprising the location with a Global Positioning System (GPS) receiver.

9. The method of claim 8 further comprising the steps of:

storing the identification record in a database comprising a plurality of prior-generated identification records; and

generating a subsequent identification record for the animal comprising the step of gathering a subsequent set of biometric information comprising location, date, and time data received by the GPS receiver.

10. The method of claim 1, wherein the step of generating the identification record further comprises including additional data selected from the group consisting of audio data, visual data, a description of the animal, birth date of the animal, death date of the animal, genetic breeding data, production data, veterinary records of the animal, medical records of the animal, feed formulas, feedlot locations, border crossings, shipping data, ownership transfers, purchaser required information, a bar-code assigned to the animal, digital encryption, a photographic record of the animal, microchip implant data, and Global Positioning System (GPS) data received by a GPS receiver.

11. The method of claim 1, wherein the animal is dead.

12. A method of identifying a non-human animal, the method comprising:

extracting a first set of biometric information from an acquired image of at least a portion of an ocular fundus of the animal, the image having been acquired using a camera and a non-scanning illumination source

generating information indicative of day and geographic location of the image acquisition,

generating an initial identification record comprising at least a portion of the first set of biometric information, the information indicative of day and geographic location, and an identity of the animal,

storing the initial identification record in a database, the database comprising a plurality of previously stored identification records,

gathering a subsequent set of biometric information from the animal,

generating a subsequent identification record comprising the subsequent set of biometric information, and

determining the identity of the animal by;

comparing the biometric information in the subsequent identification record to the biometric information in each of the previously stored identification records in the database, and

if a matching identification record is found in the database, extracting the identity of the animal therefrom.

13. A method of creating an identification record for a non-human animal, the method comprising:

employing a Global Positioning System (GPS) receiver to receive GPS data comprising at least a day and geographic location of the animal at the time a biometric measurement therefor is collected,

the biometric measurement comprises an image, generated using a camera and a non-scanning illumination source, of at least a portion of an ocular fundus, and

storing at least the GPS data and the biometric measurement as the identification record.

14. The method of claim 13, wherein the identification record further comprises a second measurement selected from the group consisting of an audio recording, a still photograph of at least a feature of the animal, a moving photograph of at least a feature of the animal, a measurement concerning genetic breeding, an image of at least a portion of an anatomical feature of the animal, a DNA test measurement, a measurement taken in connection with medical treatment, a reading from a microchip implanted in the animal, and a disease screening test.

15. The method of claim 14, wherein the portion of an ocular fundus comprises at least a portion of retinal vasculature, and the step of employing a GPS receiver further comprises receiving a time for the biometric measurement.

16. An apparatus for creating an identification record for a non-human animal, the apparatus comprising:

an image acquisition device for capturing an image of at least a portion of an ocular fundus of the animal, the device comprising a non-scanning illumination source for projecting light onto the ocular fundus of the animal and a camera;

a computerized image analysis device for extracting a set of analysis data from the acquired image, the analysis data to represent a particular identified anatomical structure of the ocular fundus; and

a device for receiving data indicative of day and geographic location of the animal when the image was so acquired.

17. The apparatus of claim 16, wherein the animal is dead, the anatomical structure so represented is at least a portion of retinal vasculature and the device for receiving data comprises a Global Positioning System (GPS) receiver.

18. The apparatus of claim 17, wherein the non-scanning illumination source for projecting light onto the ocular fundus of the animal comprises an infrared light source and a lens system contained within a single housing, the image acquisition device and device for receiving data are interfaced, and the GPS data further comprises a time the image was so acquired.

19. A system for identifying a non-human animal, the system comprising:

a computerized image analysis device for extracting first biometric information from an image of at least a portion of an ocular fundus of the animal;

an image acquisition device comprising a camera and a non-scanning illumination source;

a storage device for storing an identification record, the identification record comprising the first biometric information, information indicative of day and geographic location of acquisition of the image, and an identity record of the animal; and

a processor for comparing the first biometric information to a plurality of identification records, each comprising biometric information and an animal identity previously stored, to find a matching identification record.

20. The system of claim 19, wherein the processor for comparing resides on a second computer at a location distant from the computerized image analysis device, and the identification record of the animal is transmitted to the processor over a communication means selected from the group consisting of infrared signal transmission, network cable, telephone line, internet, satellite transmission, or facsimile transmission.

21. The system of claim 19, wherein the information indicative of day and geographic location comprises Global Positioning System (GPS) data received by a GPS receiver and the storage device comprises media selected from the group consisting of compact disk (CD), magnetic disc, optical disc, magnetic tape, or smart card.

22. The system of claim 19, wherein the storage device comprises a device that stores information electronically, and the information indicative of day and geographic location comprises Global Positioning System (GPS) data further comprising a time the image is acquired.

23. The system of claim 19, wherein the storage device for storing the identification record is interfaced with a computer, the identification record of the animal is transmitted to the processor for the comparing, and the animal is dead.

24. The system of claim 23, wherein the first biometric information is transmitted to the computer by means selected from the group consisting of an infrared port, PC card, magnetic media, and cable;

and the storage device comprises media selected from the group consisting of compact disk, magnetic disc, optic disc, magnetic tape, or smart card.

25. A system for identifying a non-human animal, the system comprising:

means for gathering biometric information about the animal, said means comprising a camera and a non-scanning illumination source for acquiring an image of at least a portion of an ocular fundus of the animal;

means for storing an identification record, the identification record comprising the biometric information, information indicative of day and geographic location of acquisition of the image, and an identity record of the animal, whereby a plurality of previously stored identification records, each comprising biometric information and an animal identity form a database; and

means of comparing the identification record for the animal to the plurality of stored identification records in the database to find a matching identification record, and extracting the identity of the animal from the matching identification record.