Processing of an image representative of an observation zone

• US 8,547,397 B2
• Filed: 03/23/2010
• Issued: 10/01/2013
• Est. Priority Date: 03/24/2009
• Status: Active Grant

• Current Assignee: Orange S.A.
• Original Assignee: Orange S.A.
• Inventors: Gachignard, Olivier
• Primary Examiner(s): Ma, Tize
• Assistant Examiner(s): He, Yingchun
• Application Number:
  US12/729,737
• Publication Number:
  US 20100245386A1
• Time in Patent Office: 1,288 Days
• Field of Search: None
• US Class Current: 345/619
• CPC Class Codes: G06T 2207/10021 Stereoscopic video; Stereoscopic image sequence
• CPC Class Codes: G06T 2207/30196 Human being; Person
• CPC Class Codes: G06T 7/33 using feature-based methods

Abstract

A method for processing data, in particular an image representative of an observation zone in which is situated an object arranged with respect to a reference plane.

Such a method comprises the following steps:

• • reception of the image which has been captured beforehand by means of first and second image capture devices,
  • display (EV2) of the image received in a plane which comprises an object plane, containing said object, and said reference plane which has been determined beforehand as being the plane situated at the intersection of a conical beam and of a parallel beam emitted respectively by said first and second image capture devices,
  • determination (EV3), in the displayed image, of the number of pixels separating two contiguous sides, respectively of the object plane and of the reference plane, and extending along a determined direction (X or Y),
  • correlation (EV4) of the determined number of pixels with the value of the measurement of the real distance (d) which separates said object from said reference plane.

Claims

1. A method for processing data, in particular an image representative of an observation zone in which is situated an object arranged with respect to a reference plane situated at a constant distance from a first image capture device and a second image capture device, the first image capture device being able to capture a conical beam and the second image capture device being able to capture a parallel beam, the object being for its part situated at a variable distance from the reference plane, said reference plane being situated at the intersection of the conical beam and of the parallel beam, comprising the following steps:

reception of two images which have been captured beforehand by means of the first and second image capture devices respectively,

display of said images received,

in the course of the display step, display of said images in two juxtaposed windows of a screen, the first window comprising an object plane including said object, and the second window comprising the reference plane,

determination, in the displayed image, of the number of pixels separating two contiguous sides and parallels, respectively of the object plane and of the reference plane, and extending along a determined direction (X or Y),

correlation of the determined number of pixels with the value of the measurement of the real distance which separates said object from said reference plane.

2. The method according to claim 1, comprising, subsequent to said correlation step, a calculation step for calculating the distance of said object with respect to the first and second image capture devices.

3. The method according to claim 1, comprising, in the case where a sound is emitted by said object or in the vicinity of the latter, the following steps:

calculation of the real distance which separates the object from said reference plane, on the basis of the intensity of said sound emitted,

comparison of said calculated real distance with the real distance obtained in the course of the correlation step.

4. The processing method according to claim 1, comprising, subsequent to the correlation step, in the case where at least one other object is situated in the observation zone, a comparison step for comparing the real distances which separate each object from the reference plane.

5. The processing method according to claim 1, comprising a segmentation step for segmenting said image received.

6. A non-transitory recording medium readable by a computer on which is recorded a computer program comprising instructions for implementing the method for processing data according to claim 1, when said program is executed by a device for processing an image representative of an observation zone in which is situated an object arranged with respect to a reference plane, comprising means for receiving two images which have been captured beforehand by means of first and second image capture devices, and means for displaying said two images received.

7. A non-transitory recording medium readable by a computer on which is recorded a computer program comprising instructions for implementing the method for processing data according to claim 2, when it is executed by a device for processing an image representative of an observation zone in which is situated an object arranged with respect to a reference plane, comprising means for receiving said two images which have been captured beforehand by means of first and second image capture devices, and means for displaying said two images received.

8. The method according to claim 2, comprising, in the case where a sound is emitted by said object or in the vicinity of the latter, the following steps:

calculation of the real distance which separates the object from said reference plane, on the basis of the intensity of said sound emitted,

comparison of said calculated real distance with the real distance obtained in the course of the correlation step.

9. A non-transitory recording medium readable by a computer on which is recorded a computer program comprising instructions for implementing the method for processing data according to claim 8, when it is executed by a device for processing an image representative of an observation zone in which is situated an object arranged with respect to a reference plane, comprising means for receiving two images which have been captured beforehand by means of first and second image capture devices, and means for displaying said two images received.

10. A non-transitory recording medium readable by a computer on which is recorded a computer program comprising instructions for implementing the method for processing data according to claim 3, when it is executed by a device for processing an image representative of an observation zone in which is situated an object arranged with respect to a reference plane, comprising means for receiving two images which have been captured beforehand by means of first and second image capture devices, and means for displaying said two images received.

11. A non-transitory recording medium readable by a computer on which is recorded a computer program comprising instructions for implementing the method for processing data according to claim 4, when it is executed by a device for processing an image representative of an observation zone in which is situated an object arranged with respect to a reference plane, comprising means for receiving two images which have been captured beforehand by means of first and second image capture devices, and means for displaying said two images received.

12. A device for processing data, in particular an image representative of an observation zone in which is situated an object arranged with respect to a reference plane situated at a constant distance from a first image capture device and a second image capture device, the first image capture device being able to capture a conical beam and the second image capture device being able to capture a parallel beam, the object being for its part situated at a variable distance from the reference plane, said reference plane being situated at the intersection of the conical beam and of the parallel beam, the device comprising:

means for receiving two images which have been captured beforehand by the first and second image capture devices, respectively,

means for displaying said image received, said display means designed to display said two images in two juxtaposed windows of a screen, the first window comprising an object plane including said object, and the second window comprising the reference plane,

means for determining in the displayed image the number of pixels separating two contiguous sides, respectively of the object plane and of the reference plane, and extending along a determined direction (X or Y),

means for correlating the determined number of pixels with the value of the measurement of the real distance which separates said object from said reference plane.

13. The processing device according to claim 12, comprising means for calculating the distance of said object with respect to the first and second image capture devices.

14. The processing device according to claim 12, furthermore comprising:

means for calculating, in the case where a sound is emitted by said object or in the vicinity of the latter, the real distance which separates said object from the reference plane, on the basis of the intensity of the sound emitted,

means for comparing said calculated distance with the distance obtained by the correlation means.

15. The processing device according to claim 12, comprising comparison means for comparing the real distance which separates the object from the reference plane with the real distance which separates another object from the reference plane, in the observation zone.

16. The processing device according to claim 12, comprising means for segmenting said image received.

17. The processing device according to claim 13, furthermore comprising:

means for calculating, in the case where a sound is emitted by said object or in the vicinity of the latter, the real distance which separates said object from the reference plane, on the basis of the intensity of the sound emitted,

means for comparing said calculated distance with the distance obtained by the correlation means.

18. A system for measuring a real distance between at least one object and a reference plane, comprising a first image capture device and a second image capture device for capturing an observation zone in which is situated said object with respect to the reference plane situated at a constant distance from the first and second image capture devices, the first image capture device being able to capture a conical beam and the second image capture device being able to capture a parallel beam, the object being for its part situated at a variable distance from the reference plane, said reference plane being situated at the intersection of the conical beam and of the parallel beam, said system comprising:

means for determining said reference plane as being the plane situated at the intersection of a conical beam and of a parallel beam emitted respectively by the first and second image capture devices,

a device for processing data comprising;

999999

means for receiving two images which have been captured beforehand by the first and second image capture devices, respectively,

means for displaying said two images in two juxtaposed windows of a screen, the first window comprising an object plane including said object, and the second window comprising said reference plane,

means for determining in the displayed image the number of pixels separating two contiguous sides, respectively of the object plane and of the reference plane, and extending along a determined direction (X or Y),

means for correlating the determined number of pixels with the value of the measurement of the real distance which separates said object from said reference plane.

19. The system according to claim 18, furthermore comprising an acoustic measurement device which is intended to measure the intensity of a sound emitted by said object or in the vicinity of the latter, said device for processing data furthermore comprising:

means for receiving the value of the measured intensity originating from the acoustic measurement device,

means for calculating the real distance which separates the object from the reference plane, on the basis of the intensity of the sound emitted,

means for comparing the calculated distance with the distance obtained by the correlation means.