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 Title: |
EP0685814B1:
Produce recognition system[German][French]
[ Derwent Title ]
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Country:
Kind: |
EP European Patent Office (EPO)
B1 PATENT SPECIFICATION i
(See also:
EP0685814A2,
EP0685814A3 )
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| Inventor: |
Bolle, Rudolf Maarten;
Connell, Jonathan Hudson;
Haas, Norman;
Mohan, Rakesh;
Taubin, Gabriel;
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| Assignee: |
International Business Machines Corporation
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| Published / Filed: |
2000-09-27
/ 1995-02-24
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| Application Number: |
EP1995000102666
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| IPC Code: |
Advanced:
G06K 9/46;
G07G 1/00;
Core:
more...
IPC-7:
B07C 5/10;
G06K 9/00;
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| ECLA Code: |
G06K9/46B1; G07G1/00C2D;
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| Priority Number: |
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| Abstract: |
[From equivalent
EP0685814A2]
The present system and apparatus uses image processing to recognize objects within a scene. The system includes an illumination source for illuminating the scene. By controlling the illumination source, an image processing system can take a first digitize image of the scene with the object illuminated a higher level and a second digitized image with the object illuminated at a lower level. Using an algorithm, the object(s) image is segmented from a background image of the scene by a comparison of the two digitized images taken. A processed image (that can be used to characterize features) of the object(s) is then compared to stored reference images. The object is recognized when a match occurs. The system can recognize objects independent of size and number and can be trained to recognize objects that it was not originally programmed to recognize.
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| Attorney, Agent or Firm: |
Teufel, Fritz, Dipl.-Phys. ;
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| INPADOC Legal Status: |
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| Designated Country: |
AT BE CH DE ES FR GB IT LI NL SE
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| Family: |
Show 18 known family members
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First Claim:
Show all claims |
1. A system for recognizing objects comprising:
- a) a light source (110) for illuminating a scene, the light source having a non-monochromatic light frequency distribution that is constant over a period of time, the light source controlled to illuminate the scene at a first illumination level and at a second illumination level lower than the first illumination level, the scene comprising one or more of the objects (131), being a target object, and a background (311, 312);
- b) a computer system having a memory storage (144), a visual input device (120) for creating a scene image including a target object image of the target object and a background image, and an algorithm (200) that produces a segmented target object image by segmenting the target object image from the background image in the scene image, the algorithm segmenting the target object image by comparing a first scene image taken at the first illumination level with a second scene image taken at a second illumination level;
- c) a plurality of reference normalized histograms (820), each of the reference normalized histograms being a histogram of a feature associated with an associated segmented reference object, the reference histograms being stored in the computer memory storage (144); and
- d) a normalizer that produces one or more target normalized histograms (810), each of the target normalized histograms being a histogram of a feature of the segmented target object image, the normalizer normalizing each of the target normalized histograms the same way as the reference normalized histograms are normalized,
whereby one or more of the target normalized histograms is compared with one or more of the reference normalized histograms and the target object is recognized as the associated segmented reference object if the target and reference normalized histograms of a feature match.
[German]
[French]
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Description
Expand description |
+ FIELD OF THE INVENTION
This invention relates to the field of recognizing (i.e., identifying, classifying, grading, and verifying) objects using computerized optical scanning devices. More specifically, the invention is a trainable system and method relating to recognizing bulk items using image processing.
+ BACKGROUND OF THE INVENTION
+ STATEMENT OF PROBLEMS WITH THE PRIOR ART
+ OBJECTS OF THE INVENTION
+ SUMMARY OF THE INVENTION
+ Brief Description of the Drawings
+ DETAILED DESCRIPTION OF THE INVENTION
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