AU2510792A - Method and apparatus for compensation for non-uniform illumination - Google Patents
Method and apparatus for compensation for non-uniform illuminationInfo
- Publication number
- AU2510792A AU2510792A AU25107/92A AU2510792A AU2510792A AU 2510792 A AU2510792 A AU 2510792A AU 25107/92 A AU25107/92 A AU 25107/92A AU 2510792 A AU2510792 A AU 2510792A AU 2510792 A AU2510792 A AU 2510792A
- Authority
- AU
- Australia
- Prior art keywords
- compensation
- uniform illumination
- illumination
- uniform
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
- G06K7/10—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation
- G06K7/10544—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation by scanning of the records by radiation in the optical part of the electromagnetic spectrum
- G06K7/10821—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation by scanning of the records by radiation in the optical part of the electromagnetic spectrum further details of bar or optical code scanning devices
- G06K7/10851—Circuits for pulse shaping, amplifying, eliminating noise signals, checking the function of the sensing device
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
- H04N1/40—Picture signal circuits
- H04N1/401—Compensating positionally unequal response of the pick-up or reproducing head
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Artificial Intelligence (AREA)
- Toxicology (AREA)
- General Health & Medical Sciences (AREA)
- Health & Medical Sciences (AREA)
- Computer Vision & Pattern Recognition (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Length Measuring Devices By Optical Means (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US74919091A | 1991-08-23 | 1991-08-23 | |
US749190 | 1991-08-23 |
Publications (1)
Publication Number | Publication Date |
---|---|
AU2510792A true AU2510792A (en) | 1993-03-16 |
Family
ID=25012662
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
AU25107/92A Abandoned AU2510792A (en) | 1991-08-23 | 1992-08-24 | Method and apparatus for compensation for non-uniform illumination |
Country Status (2)
Country | Link |
---|---|
AU (1) | AU2510792A (en) |
WO (1) | WO1993004442A1 (en) |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5780834A (en) * | 1995-05-15 | 1998-07-14 | Welch Allyn, Inc. | Imaging and illumination optics assembly |
US5784102A (en) * | 1995-05-15 | 1998-07-21 | Welch Allyn, Inc. | Optical reader having improved interactive image sensing and control circuitry |
US6122408A (en) * | 1996-04-30 | 2000-09-19 | Siemens Corporate Research, Inc. | Light normalization method for machine vision |
US6670988B1 (en) | 1999-04-16 | 2003-12-30 | Eastman Kodak Company | Method for compensating digital images for light falloff and an apparatus therefor |
US6546197B2 (en) * | 2000-03-15 | 2003-04-08 | Fuji Photo Film Co., Ltd. | Method and apparatus of correcting image data picked up from photographic film |
US7268924B2 (en) | 2001-01-22 | 2007-09-11 | Hand Held Products, Inc. | Optical reader having reduced parameter determination delay |
GB2372392A (en) * | 2001-02-16 | 2002-08-21 | Hewlett Packard Co | Improvements to image capture |
JP2003087653A (en) | 2001-09-06 | 2003-03-20 | Ricoh Co Ltd | Imaging apparatus |
US8628015B2 (en) | 2008-10-31 | 2014-01-14 | Hand Held Products, Inc. | Indicia reading terminal including frame quality evaluation processing |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4314281A (en) * | 1979-10-12 | 1982-02-02 | Xerox Corporation | Shading compensation for scanning apparatus |
US4430748A (en) * | 1981-09-21 | 1984-02-07 | Xerox Corporation | Image thresholding system |
-
1992
- 1992-08-24 WO PCT/US1992/007054 patent/WO1993004442A1/en active Application Filing
- 1992-08-24 AU AU25107/92A patent/AU2510792A/en not_active Abandoned
Also Published As
Publication number | Publication date |
---|---|
WO1993004442A1 (en) | 1993-03-04 |
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