Devices and methods for analyzing animal behavior

• US 10,650,228 B2
• Filed: 09/16/2016
• Issued: 05/12/2020
• Est. Priority Date: 09/18/2015
• Status: Active Grant

• Current Assignee: Children's Medical Center Corporation, President and Fellows of Harvard College (Harvard Corporation)
• Original Assignee: Children's Medical Center Corporation
• Inventors: Roberson, David P., Woolf, Clifford J., Do, Michael T., Wiltschko, Alexander B., Datta, Sandeep Robert
• Primary Examiner(s): Osifade, Idowu O
• Application Number:
  US15/760,792
• Publication Number:
  US 20190080158A1
• Time in Patent Office: 1,334 Days
• Field of Search: None
• CPC Class Codes: A01K 1/031 Cages for laboratory animals; Cages for measuring metabolism of animals
• CPC Class Codes: A01K 29/005 Monitoring or measuring activity, e.g. detecting heat or mating
• CPC Class Codes: A61B 2503/40 Animals
• CPC Class Codes: A61B 5/0077 Devices for viewing the surface of the body, e.g. camera, magnifying lens
• CPC Class Codes: A61B 5/1113 Local tracking of patients, e.g. in a hospital or private home
• CPC Class Codes: A61B 5/1118 Determining activity level
• CPC Class Codes: A61B 5/112 Gait analysis
• CPC Class Codes: A61B 5/165 Evaluating the state of mind, e.g. depression, anxiety
• CPC Class Codes: A61B 5/4824 Touch or pain perception evaluation A61B5/4821 takes precedence
• CPC Class Codes: A61B 5/7267 involving training the classification device
• CPC Class Codes: G06V 10/141 Control of illumination
• CPC Class Codes: G06V 10/145 Illumination specially adapted for pattern recognition, e.g. using gratings
• CPC Class Codes: G06V 10/147 Details of sensors, e.g. sensor lenses fingerprint or palmprint sensors G06V40/13; vascular sensors G06V40/145; eye sensors G06V40/19
• CPC Class Codes: G06V 40/10 Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
• CPC Class Codes: G06V 40/20 Movements or behaviour, e.g. gesture recognition recognition of facial expressions G06V40/16
• CPC Class Codes: G06V 40/25 Recognition of walking or running movements, e.g. gait recognition

Abstract

A device for detecting and recording animal behavior is provided. The device includes at least one corral that defines a contained field, the base surface of the at least one corral being sensitive to the animal'"'"'s footprint. The device also includes an image capturing device that cooperates with the base surface to capture a first video frame in which at least one of a tail, body and head of the animal is illuminated by a light below the animal and a second video frame in which both a profile of a full footprint and a profile of a toe print of the animal when the animal is standing on its toes is illuminated by a light that is totally internally reflected within the base surface. A control system is arranged to control the image capturing device to capture the first and second video frames.

Claims

1. A device for detecting and recording animal behavior, the device comprising:

at least one corral defining a contained field, a base surface of the at least one corral being sensitive to a footprint of the animal; and

an image capturing device cooperating with the base surface to capture a first video frame in which at least one of a tail, body and head of the animal is illuminated by a light below the animal and a second video frame in which both a profile of a full footprint of the animal and a profile of a toe print of the animal when the animal is standing on its toes is illuminated by a light that is totally internally reflected within the base surface;

a control system arranged to control the image capturing device to capture the first and second video frames, the control system being further arranged to identify a paw in the first video frame and measure a corresponding luminance of the identified paw in the second frame.

2. The device of claim 1, wherein the control system identifies the paw in the first video frame by extracting a paw image from the first video frame, identifying a position of the tail and tail base, and determining the identity of the paw based upon the position of the tail.

3. The device of claim 2, wherein the identity of the paw is one of the right-front, right-back, left-front and left-back paw.

4. The device of claim 1, wherein the control system is further arranged to save the identified paw information and the corresponding luminance.

5. The device of claim 1, wherein, when the at least one of the tail, body, and head of the animal is illuminated by the light below the animal, a dark field is created above the animal.

6. A method of collecting behavior information of an animal, the method comprising:

capturing a first image of at least one of a head, body and tail of the animal when the animal is illuminated with a first light;

capturing a second image of both a profile of a full footprint of the animal and a profile of a toe print of the animal when a second light is totally internally reflected within the base surface to generate evanescent light between the footprint and the toe print of the animal and the base surface;

identifying a first footprint in the first image; and

measuring a corresponding evanescent light generated between the identified first footprint and the base surface in the second image.

7. The method of claim 6, wherein identifying the first footprint comprises:

extracting an image of the first footprint from the first image;

identifying a position of the tail of the animal in the first image; and

determining an identity of the first footprint.

8. The method of claim 7, wherein determining the identity of the first footprint includes determining a quadrant in which the foot is located based upon a position of a nose and body midline of the animal as determined by the position of the tail.

9. The method of claim 7, wherein identifying the position of the tail includes identifying the position of the tail base.

10. The method of claim 6, further comprising saving the first footprint identity and the corresponding generated evanescent light.

11. The method of claim 6, wherein imaging both the footprint and the toe print of the animal comprises capturing the spatial extent of the contact, the weight born increasing intensity, and its change over time.

12. The method of claim 6, further comprising saving the first and second images.

13. The method of claim 12, wherein saving the first images comprises saving data of the at least one of the head, body and tail of the animal and discarding other remaining data.

14. The method of claim 12, wherein saving the second image comprises saving data of the both the profile of the full footprint of the animal and the profile of the toe print of the animal other remaining data.

15. The method of claim 13, wherein discarding other remaining data comprises discarding data of an environment of the animal.

16. The method of claim 8, further comprising, before capturing the first image, illuminating the at least one of the head, body and tail of the animal with the first light.

17. The method of claim 16, further comprising, before capturing the second imaging, turning off the first light.

18. The method of claim 6, where illuminating the at least of the head, body and tail of the animal with the first light includes illuminating the at least one of the head, body and tail of the animal from below the animal.

19. A device for detecting and recording animal behavior, the device comprising:

at least one corral defining a contained field, a base surface of the at least one corral being sensitive to a footprint of the animal; and

an image capturing device cooperating with the base surface to capture both a profile of a full footprint of the animal and a profile of a toe print of the animal when the animal is standing on its toes;

wherein a first light is totally internally reflected within the base surface;

wherein a second light illuminates at least one of a tail, body and head of the animal from below the animal.

20. The device of claim 19, further comprising a first light source for producing the first light.

21. The device of claim 20, further comprising a second light source for producing the second light.

22. The device of claim 20, wherein the first light source also produces the second light.

23. The device of claim 19, wherein the second light illuminates at least one of the tail, body and head of the animal from below the animal while a dark field is created above the animal.

24. The device of claim 19, wherein the image capturing device is arranged to capture an image of the at least one of the tail, body and head of the animal when the animal is illuminated with the second light.

25. The device of claim 19, wherein the image capturing device is arranged to capture an image of the profile of the full footprint of the animal and the profile of the toe print of the animal when the animal is standing on its toes when the second light is off.