Volume dimensioning system calibration systems and methods

• US 10,321,127 B2
• Filed: 03/05/2013
• Issued: 06/11/2019
• Est. Priority Date: 08/20/2012
• Status: Active Grant

• Current Assignee: Intermec IP Corporation (Honeywell International Inc.)
• Original Assignee: Intermec IP Corporation (Honeywell International Inc.)
• Inventors: Laffargue, Franck, Thuries, Serge, Ackley, H. Sprague
• Primary Examiner(s): Ustaris, Joseph G
• Assistant Examiner(s): Sechser, Jill D
• Application Number:
  US13/786,131
• Publication Number:
  US 20140049635A1
• Time in Patent Office: 2,289 Days
• CPC Class Codes: G01F 17/00 Methods or apparatus for determining the capacity of containers or cavities, or the volume of solid bodies measuring linear dimensions to determine volume G01B
• CPC Class Codes: G01F 25/0084 for measuring volume
• CPC Class Codes: H04N 17/002 for television cameras

Abstract

Various corporate, industry, and regulatory guidelines, best practices and standards are used in establishing acceptable levels of accuracy for volume dimensioning systems used in commerce. A volume dimensioning system can determine at least one distortion value that is indicative of an amount of distortion present in the system and responsive to the amount of distortion, autonomously alter or adjust the units of accuracy of information reported by the system. Such alteration or adjustment of units of accuracy may be performed based on an assessment of the distortion relative to a number of distortion thresholds. Responsive to the assessment, the volume dimensioning system can adjust a unit of accuracy in a representation of volume dimensioning related information.

Claims

1. A volume dimensioning system, comprising:

at least one image sensor that provides image data representative of a number of images of a field of view of the at least one image sensor; and

a control subsystem communicatively coupled to the at least one image sensor to receive the image data therefrom, the control subsystem including at least one nontransitory storage medium and at least one processor, the at least one nontransitory storage medium which stores at least one of information or processor executable instructions; and

the at least one processor which;

determines at least one distortion value indicative of an amount of distortion in the images based at least in part on at least a portion of a calibration pattern which appears in the field of view of the at least one image sensor in at least some of the images, the calibration pattern having a set of defined characteristics;

assesses the at least one distortion value relative to a number of distortion threshold values; and

adjusts an output of volume dimensioning related information comprising dimensional information and volume information from a first unit of accuracy to a second unit of accuracy in a reporting of volume dimensioning related information based at least in part on the assessment of the at least one distortion value relative to the distortion threshold values.

2. The volume dimensioning system of claim 1 wherein the at least one processor determines the at least one distortion value as at least one set of optical distortion values and at least one set of dimensional distortion values, the set of optical distortion values representative of an optical contribution to distortion in the image data and the set of dimensional distortion values representative of a dimensional contribution to distortion in the image data.

3. The volume dimensioning system of claim 1 wherein the at least one processor assesses the at least one distortion value relative to a recalibration threshold value that represents distortion correctable via a self recalibration by the volume dimensioning system.

4. The volume dimensioning system of claim 3 wherein the at least one processor assesses the at least one distortion value relative to a service required threshold value that represents distortion that can only be corrected via a servicing of the volume dimensioning system by a service technician.

5. The volume dimensioning system of claim 4 wherein the at least one processor adjusts the unit of accuracy in the output of volume dimensioning related information in response to an assessment that the at least one distortion value exceeds the recalibration threshold value and is below the service required threshold value.

6. The volume dimensioning system of claim 5 wherein responsive to the determination that the at least one distortion value is less than the recalibration threshold value, the at least one processor recalibrates the volume dimensioning system to a fine unit of accuracy;

and wherein responsive to the determination that the at least one distortion value exceeds the recalibration threshold value and is below the service required threshold value, the at least one processor recalibrates the volume dimensioning system to a coarse unit of accuracy.

7. The volume dimensioning system of claim 4 wherein the processor further produces an alert in response to an assessment that the at least one distortion value exceeds the service required threshold value.

8. The volume dimensioning system of claim 3 wherein the processor further determines at least one of a set of calculated optical distortion correction factors or a set of calculated dimensional correction factors in response to an assessment that the at least one distortion value is within the recalibration threshold value and wherein the processor further applies at least one of the set of calculated optical distortion correction factors or the set of calculated dimensional correction factors to the image data in determining the volume dimensioning related information.

9. The volume dimensioning system of claim 1 wherein the processor adjusts a decimal place represented to adjust the unit of accuracy in the output of volume dimensioning related information.

10. The volume dimensioning system of claim 1 wherein the processor adjusts a dimensional unit of measurement represented to adjust the unit of accuracy in the output of volume dimensioning related information.

11. The volume dimensioning system of claim 1 wherein the processor adjusts a unit of currency represented to adjust the unit of accuracy in the output of volume dimensioning related information.

12. The volume dimensioning system of claim 1, further comprising an illumination subsystem communicably coupled to the control subsystem, the illumination subsystem to at least partially illuminate the calibration pattern.

13. The volume dimensioning system of claim 1, further comprising a support structure to receive at least the at least one image sensor such that when the at least one image sensor is received by the support structure at least a portion of the pattern is within a field of view of the at least one image sensor.

14. The volume dimensioning system of claim 1 wherein the at least one distortion value is associated with at least one of data indicative of a date or data indicative of a time and wherein the at least one distortion value and the respective associated data indicative of a date or data indicative of a time are stored in the non-transitory storage medium.

15. A volume dimensioning method comprising:

receiving by at least one dimensioning system processor image data representative of a number of images in a field of view of at least one image sensor;

determining by the at least one dimensioning system processor at least one distortion value indicative of an amount of distortion in the images based at least in part on at least a portion of a calibration pattern which appears in the field of view of the at least one image sensor in at least some of the images, the calibration pattern having a set of defined characteristics;

assessing by the at least one dimensioning system processor the at least one distortion value relative to a number of distortion threshold values stored in a non-transitory storage medium communicably coupled to the at least one dimensioning system processor; and

adjusting, by the at least one dimensioning system processor, an output of reported volume dimensioning related information comprising dimensional information and volume information from a first unit of accuracy to a second unit of accuracy based at least in part on the assessment of the at least one distortion value relative to the distortion threshold values.

16. The volume dimensioning method of claim 15, wherein assessing by the at least one dimensioning system processor the at least one distortion value relative to a number of distortion threshold values includes:

determining the at least one distortion value as at least one set of optical distortion values and at least one set of dimensional distortion values;

wherein the set of optical distortion values represent an optical contribution to distortion in the image data; and

wherein the set of dimensional distortion values represent a dimensional contribution to distortion in the image data.

17. The volume dimensioning method of claim 15 wherein assessing by the at least one dimensioning system processor the at least one distortion value relative to a number of distortion threshold values includes:

assessing the at least one distortion value relative to a recalibration threshold value representing distortion correctable via a recalibration of the volume dimensioning system.

18. The volume dimensioning method of claim 17 wherein assessing by the at least one dimensioning system processor the at least one distortion value relative to a number of distortion threshold values includes:

assessing the at least one distortion value relative to a service required threshold value representing distortion not correctable via recalibration of the volume dimensioning system.

19. The volume dimensioning method of claim 18 wherein assessing by the at least one dimensioning system processor the at least one distortion value relative to a number of distortion threshold values includes:

assessing the at least one distortion value to fall between the recalibration threshold value and the service required threshold value, representing distortion correctable via a recalibration of the volume dimensioning system.

20. The volume dimensioning method of claim 19 wherein adjusting a unit of accuracy in the output of volume dimensioning related information based at least in part on the assessment of the at least one distortion value relative to the distortion threshold values includes:

recalibrating the volume dimensioning system to a fine unit of accuracy responsive to an assessment that the at least one distortion value relative to the recalibration threshold value indicates a distortion correctable via recalibration;

recalibrating the volume dimensioning system to a coarse unit of accuracy responsive to an assessment that the at least one distortion value falls between the recalibration threshold value and the service required threshold value; and

generating an alert responsive to an assessment that the at least one distortion value relative to the service required threshold value indicates a distortion not correctable via recalibration.

21. The volume dimensioning method of claim 15 further comprising:

responsive to the determination that the at least one distortion value is within the recalibration threshold value, determining by the at least one dimensioning system processor at least one of a set of calculated optical distortion correction factors or a set of calculated dimensional correction factors; and

applying at least one of the set of calculated optical distortion correction factors or the set of calculated dimensional correction factors to the image data in determining the volume dimensioning related information.

22. A volume dimensioning controller, comprising:

at least one input communicably coupled to at least one processor, the at least one input to receive image data representative of a number of images of a field of view of at least one image sensor; and

at least one processor communicably coupled to the at least one non-transitory storage medium, the at least one processor to;

determine at least one distortion value indicative of an amount of distortion in the images based at least in part on at least a portion of a calibration pattern which appears in the field of view of the at least one image sensor in at least some of the images, the calibration pattern having a set of defined characteristics;

assess the at least one distortion value relative to a number of distortion threshold values stored in the non-transitory storage medium; and

adjust an output of reported volume dimensioning related information comprising dimensional information and volumetric information from a first unit of accuracy to a second unit of accuracy based at least in part on the assessment of the at least one distortion value relative to the distortion threshold values.

23. The volume dimensioning controller of claim 22 wherein the at least one processor determines the at least one distortion value as at least one set of optical distortion values and at least one set of dimensional distortion values, the set of optical distortion values representative of an optical contribution to distortion in the image data and the set of dimensional distortion values representative of a dimensional contribution to distortion in the image data.

24. The volume dimensioning system of claim 22 wherein the at least one processor assesses the at least one distortion value relative to a recalibration threshold value that represents distortion correctable via a self recalibration by the volume dimensioning system.

25. The volume dimensioning system of claim 24 wherein the at least one processor assesses the at least one distortion value relative to a service required threshold value that represents distortion that can only be corrected via a servicing of the volume dimensioning system by a service technician.

26. The volume dimensioning system of claim 25 wherein the at least one processor adjusts the unit of accuracy in the output of volume dimensioning related information in response to an assessment that the at least one distortion value exceeds the recalibration threshold value and is below the service required threshold value.

27. The volume dimensioning system of claim 26 wherein responsive to the determination that the at least one distortion value is less than the recalibration threshold value, the at least one processor recalibrates the volume dimensioning system to a fine unit of accuracy;

and wherein responsive to the determination that the at least one distortion value exceeds the recalibration threshold value and is below the service required threshold value, the at least one processor recalibrates the volume dimensioning system to a coarse unit of accuracy.