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 Title: |
US5631976:
Object imaging system
[ Derwent Title ]
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| Country: |
US United States of America
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| Inventor: |
Bolle, Rudolf M.; Bedford Hills, NY
Connell, Jonathan H.; Cortlandt-Manor, NY
Haas, Norman; Mount Kisco, NY
Mohan, Rakesh; Stamford, CT
Taubin, Gabriel; Hartsdale, NY
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| Assignee: |
International Business Machines Corporation, Armonk, NY
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| Published / Filed: |
1997-05-20
/ 1994-04-29
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| Application Number: |
US1994000235064
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| IPC Code: |
Advanced:
G06T 5/50;
G06T 7/20;
H04N 5/235;
H04N 5/275;
Core:
H04N 5/272;
more...
IPC-7:
G06K 9/00;
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| ECLA Code: |
G06T5/50; H04N5/235L; H04N5/275;
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| U.S. Class: |
Current:
382/174;
348/E05.038;
348/E05.059;
358/464;
382/171;
382/274;
Original:
382/174;
382/171;
382/274;
358/464;
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| Field of Search: |
382/008,9,171,173,174,274
235/460
348/135,92,370,227
358/464
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| Priority Number: |
| 1994-04-29 |
US1994000235064 |
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| Abstract: |
An image processing system segments an object from the background of a scene by controlling a light source to illuminate the object more in one scene image than in another scene image. The two scene images are captured by an image input device and are then compared. The part of the image that experienced an increase in intensity is segmented as corresponding to the object. The image input device and the light source can also be placed in an opaque enclosure with an opening through which the input device can view and the light can illuminate the object. By placing the enclosure the correct distance away from the object, the effects of ambient light on the image are removed. Object glare is removed by a polarizing filter system.
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| Attorney, Agent or Firm: |
Percello, Louis J. ;
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| Primary / Asst. Examiners: |
Boudreau, Leo; Kelley, Chris
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| INPADOC Legal Status: |
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Family Legal Status Report
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| Designated Country: |
DE FR GB
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| Family: |
Show 3 known family members
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First Claim:
Show all 19 claims |
We claim:
1. An image processing system for separating one or more objects in a scene from a background of the scene, comprising:
- a controllable light source for illuminating the scene, the controllable light source having an on illumination level and a reduced illumination level, the controllable light source positioned at an object distance from the object and a background distance from the background, a reflectance of light from the object divided by the square of the object distance being greater than a reflectance of light from the background divided by the square of the background distance when the controllable light source is at the on illumination level and the reduced illumination level;
- an image input device taking two or more images of the the scene, a first scene image taken with the controllable light source on and a second scene image taken with the controllable light source at the reduced illumination level, the first scene image having an object image brighter than the object image in the second scene;
- a comparator comparing the first and second scene images, one or more pixels being object pixels that are brighter in the first scene image than in the second scene image; and
- a comparator designator designating the object pixels as an object image separate from a background image of the background of the scene.
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| Background / Summary: |
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| Drawing Descriptions: |
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| Description: |
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| Forward References: |
Show 18 U.S. patent(s) that reference this one
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