WO1998017406B1 - Uniform, high intensity light projector suitable for use in machine vision applications - Google Patents
Uniform, high intensity light projector suitable for use in machine vision applicationsInfo
- Publication number
- WO1998017406B1 WO1998017406B1 PCT/US1997/019095 US9719095W WO9817406B1 WO 1998017406 B1 WO1998017406 B1 WO 1998017406B1 US 9719095 W US9719095 W US 9719095W WO 9817406 B1 WO9817406 B1 WO 9817406B1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- fruit
- light
- illumination
- high intensity
- item
- Prior art date
Links
- 235000013399 edible fruits Nutrition 0.000 claims abstract 40
- 238000005286 illumination Methods 0.000 claims abstract 30
- 240000007072 Prunus domestica Species 0.000 claims abstract 3
- 230000002950 deficient Effects 0.000 claims abstract 3
- 238000004519 manufacturing process Methods 0.000 claims abstract 2
- 235000013569 fruit product Nutrition 0.000 claims 10
- 238000007493 shaping process Methods 0.000 claims 5
- 235000019804 chlorophyll Nutrition 0.000 claims 2
- ATNHDLDRLWWWCB-AENOIHSZSA-M chlorophyll a Chemical compound C1([C@@H](C(=O)OC)C(=O)C2=C3C)=C2N2C3=CC(C(CC)=C3C)=[N+]4C3=CC3=C(C=C)C(C)=C5N3[Mg-2]42[N+]2=C1[C@@H](CCC(=O)OC\C=C(/C)CCC[C@H](C)CCC[C@H](C)CCCC(C)C)[C@H](C)C2=C5 ATNHDLDRLWWWCB-AENOIHSZSA-M 0.000 claims 2
- 229930002875 chlorophylls Natural products 0.000 claims 2
- 239000011521 glass Substances 0.000 claims 2
- 230000001902 propagating Effects 0.000 claims 2
- 230000003595 spectral Effects 0.000 claims 2
- GYHNNYVSQQEPJS-UHFFFAOYSA-N Gallium Chemical compound [Ga] GYHNNYVSQQEPJS-UHFFFAOYSA-N 0.000 claims 1
- 229910052733 gallium Inorganic materials 0.000 claims 1
- 229910001507 metal halide Inorganic materials 0.000 claims 1
- 150000005309 metal halides Chemical class 0.000 claims 1
- KEAYESYHFKHZAL-UHFFFAOYSA-N sodium Chemical compound [Na] KEAYESYHFKHZAL-UHFFFAOYSA-N 0.000 claims 1
- 229910052708 sodium Inorganic materials 0.000 claims 1
- 239000011734 sodium Substances 0.000 claims 1
- 229910052716 thallium Inorganic materials 0.000 claims 1
- BKVIYDNLLOSFOA-UHFFFAOYSA-N thallium Chemical compound [Tl] BKVIYDNLLOSFOA-UHFFFAOYSA-N 0.000 claims 1
- RMUKCGUDVKEQPL-UHFFFAOYSA-K triiodoindigane Chemical compound I[In](I)I RMUKCGUDVKEQPL-UHFFFAOYSA-K 0.000 claims 1
- 238000007689 inspection Methods 0.000 abstract 1
- 238000002310 reflectometry Methods 0.000 abstract 1
Abstract
Fruit defects of interest in the production of prunes are identified based on characteristics of illumination reflected by the fruit. Various reflection characteristics can be used in this regard including near infrared reflectivity and polarization state of the reflected illumination. In one embodiment, the apparatus (10) of the present invention includes a transport system (12) for transporting fruit (14) through an inspection zone (16), a reflector type illumination system (18) for illuminating the fruit, a detector system (20) for detecting reflected illumination (21), a sorting system (22) for separating defective fruit from good fruit, and a control system (24) for controlling operation of the sorting system based on signals from the detector system and transport system. In another embodiment, a projector type illumination system (18') provides a uniform, high intensity strip of light that illuminates the fruit. The light projector is suitable for use in other machine vision applications.
Claims
1. A method for use in detecting fruit defects, comprising the steps of: subjecting a fruit item to a treatment to affect a chlorophyll response of the fruit item; subjecting the fruit item to illumination; detecting illumination reflected by the fruit item; and analyzing the reflected illumination to detect fruit defects.
2. The method of claim 1 in which the step of analyzing includes: determining a reflectance threshold relative to an illumination reflection characteristic indicative of the fruit defects; and conducting a threshold analysis wherein the fruit defects are identified based on a reflected illumination intensity in excess of the reflectance threshold.
3. The method of claim 1 in which the step of detecting illumination includes detecting illumination reflected by the fruit item in the near infrared spectral range.
4. The method of claim 1 in which: the step of subjecting the fruit item to illumination includes actively illuminating the fruit item with transmitted illumination having an incident first polarization state; and the step of detecting illumination comprises detecting reflected illumination having a second polarization state that is different from the incident first polarization state.
5. A method of identifying fruit defects in a fruit product stream for use in the production of prunes, comprising the steps of: identifying an illumination reflection characteristic indicative of a fruit defect of interest; determining a reflectance threshold relative to the illumination reflection characteristic; subjecting a fruit item in the fruit product stream to illumination; detecting illumination reflected by the fruit item; analyzing the reflected illumination relative to the reflectance threshold to identify fruit defects; selectively removing the fruit item from the fruit product stream based on the step of analyzing and thereby producing a first acceptable fruit product stream and a removed fruit product stream; treating a removed fruit item in the removed fruit product stream to affect a chlorophyll response of the removed fruit item; detecting illumination reflected by the removed fruit item after the step of treating the removed fruit item; analyzing the illumination reflected by the removed fruit item to detect fruit defects; and segregating the removed fruit item from the removed fruit product stream based on the step of analyzing illumination reflected by the removed fruit item and thereby producing a second acceptable fruit product stream.
6. The method of claim 5, further comprising the step of processing the first and second acceptable fruit product streams to produce prunes.
7. The method of claim 5 in which the step of detecting illumination reflected by the removed fruit item includes detecting illumination in the near infrared spectral range reflected by the removed fruit item.
8. The method of claim 1 or 5 in which the step of subjecting the fruit item to illumination includes actively illuminating the fruit item with transmitted illumination having a high intensity in the near infrared range by employing a near infrared lamp.
9. The method of claim 2 or 5 in which the fruit product stream includes defective fruit and good fruit, the illumination reflection characteristic involves a polarization phenomenon, and the step of determining a reflectance threshold comprises identifying an intensity level of reflected illumination having a selected polarization characteristic so that defective fruit can be distinguished from good fruit relative to the intensity level.
10. A light projector from which light propagates to form a high intensity line of light having a substantially uniform intensity distribution over a target surface positioned a distance from the light projector, comprising: a source of high intensity light formed in an oblong shape and propagating in a direction along an optic axis toward a target surface; and a lens assembly positioned to receive the high intensity light and including a light beam shaping device and an optically transmissive light dispersing device, the light beam shaping device concentrating the high intensity light in a narrow line of high intensity light having a nonuniform intensity distribution characterized by low intensity and high intensity regions distributed along the line, and the optically transmissive light dispersing device positioned to receive from the light beam shaping device light propagating from the high intensity region of the line, the light dispersing device redirecting and thereby contributing a portion of the light from the high intensity region laterally toward the low intensity region to make substantially uniform the distribution of light energy along the line of light as it propagates toward the target surface.
11. The light projector of claim 10 in which the source of high intensity light comprises a thin, long apertured arc lamp.
12. The light projector of claim 11 in which the arc lamp is of a metal halide type that is doped with thallium, gallium, indium iodide, or sodium.
13. The light projector of claim 11 in which the apertured arc lamp comprises a long, thin tubular arc lamp partly surrounded by an elongate curved reflector.
14. The light projector of claim 11 in which the light beam shaping device includes two cylindrical lenses positioned to form a V-shaped lens assembly having two ends and a lens apex region, the lens apex region being farther from the source of high intensity light than are the two ends and the optic axis extending through the lens apex region.
15. The light projector of claim 11 in which the optic axis extends through the high intensity region of the line and the low intensity region of the line is divided into two portions positioned on either side of the high intensity region, the optically transmissive light dispersing device comprising multiple spaced-apart light transmissive elements positioned on either side of the optic axis.
16. The light projector of claim 15 in which the multiple light transmissive elements include glass rods.
17. The light projector of claim 16 in which the glass rods are of cylindrical shape.
18. The light projector of claim 15 in which the multiple light transmissive elements are positioned to form a V-shaped element assembly having two ends and an element apex region, the element apex region being farther from the source of high intensity light than are the two ends and the optic axis extending through the element apex region.
19. The light projector of claim 11 in which the source of high intensity light has a length and the lens assembly is nonlinear with a length greater than that of the high intensity light to extend the narrow line of high intensity light beyond the length of the source of high intensity light.
20. The light projector of claim 19 in which the light beam shaping device includes a cylindrical lens and the optically transmissive light dispersing device includes multiple spaced-apart light transmissive elements positioned near and on either side of the optic axis.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP97912859A EP0932458A1 (en) | 1996-10-23 | 1997-10-22 | Uniform, high intensity light projector suitable for use in machine vision applications |
| AU49941/97A AU718972B2 (en) | 1996-10-23 | 1997-10-22 | Uniform, high intensity light projector suitable for use in machine vision applications |
| CA002269330A CA2269330A1 (en) | 1996-10-23 | 1997-10-22 | Uniform, high intensity light projector suitable for use in machine vision applications |
| JP10519605A JP2001502804A (en) | 1996-10-23 | 1997-10-22 | Uniform intense light projector suitable for use in vision equipment applications |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US08/735,730 US5808305A (en) | 1996-10-23 | 1996-10-23 | Method and apparatus for sorting fruit in the production of prunes |
| US08/735,730 | 1996-10-23 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| WO1998017406A1 WO1998017406A1 (en) | 1998-04-30 |
| WO1998017406B1 true WO1998017406B1 (en) | 1998-06-18 |
Family
ID=24956954
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/US1997/019095 WO1998017406A1 (en) | 1996-10-23 | 1997-10-22 | Uniform, high intensity light projector suitable for use in machine vision applications |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US5808305A (en) |
| EP (1) | EP0932458A1 (en) |
| JP (1) | JP2001502804A (en) |
| AU (1) | AU718972B2 (en) |
| CA (1) | CA2269330A1 (en) |
| WO (1) | WO1998017406A1 (en) |
Families Citing this family (24)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL1002984C2 (en) * | 1996-05-02 | 1997-11-06 | Cpro Dlo | Method for determining the ripeness and quality of seeds by means of the chlorophyll content and device for selecting seeds by means of such a method. |
| US6075882A (en) * | 1997-06-18 | 2000-06-13 | Philip Morris Incorporated | System and method for optically inspecting cigarettes by detecting the lengths of cigarette sections |
| US6225620B1 (en) | 1998-03-31 | 2001-05-01 | Key Technology, Inc. | Peach pit detection apparatus and method |
| US6410872B2 (en) | 1999-03-26 | 2002-06-25 | Key Technology, Inc. | Agricultural article inspection apparatus and method employing spectral manipulation to enhance detection contrast ratio |
| BE1013056A3 (en) * | 1999-06-28 | 2001-08-07 | Barco Elbicon Nv | Method and device for sorting products. |
| US6836325B2 (en) | 1999-07-16 | 2004-12-28 | Textron Systems Corporation | Optical probes and methods for spectral analysis |
| US6424416B1 (en) | 1999-10-25 | 2002-07-23 | Textron Systems Corporation | Integrated optics probe for spectral analysis |
| US6610973B1 (en) * | 1999-07-27 | 2003-08-26 | Davis, Iii John Merrill | Pill counting aid using a planar light diffusing panel for receipt and retention of the pills |
| US6418805B1 (en) | 1999-11-18 | 2002-07-16 | Textron Systems Corporation | Constituent sensing system |
| AU4012101A (en) | 2000-03-10 | 2001-09-24 | Textron Systems Corp | Optical probes an methods for spectral analysis |
| US6605807B2 (en) | 2000-06-05 | 2003-08-12 | The Boeing Company | Infrared crack detection apparatus and method |
| DE10036095A1 (en) * | 2000-07-25 | 2002-05-02 | Vitronic Dr Ing Stein Bildvera | Device for the detection or monitoring of moving processes |
| US20070245908A1 (en) * | 2006-04-20 | 2007-10-25 | Helio Brandao | Fruit juice extractor including peel oil and frit separation filter and associated methods |
| ES2324324B9 (en) * | 2007-02-27 | 2019-03-12 | Roda Iberica S L U | SYSTEM FOR AUTOMATIC SELECTIVE SEPARATION OF CITRUS AFFECTED BY PODREDUMBRE |
| ES2352713B1 (en) * | 2008-04-24 | 2011-10-13 | Instituto Valenciano De Investigaciones Agrarias | MACHINE FOR INSPECTION AND AUTOMATIC SELECTION OF ARILOS DE GRANADA BY ARTIFICIAL VISION. |
| FR2936682B1 (en) * | 2008-10-06 | 2013-02-15 | Cnh France | METHOD FOR SELECTIVE HARVESTING OF A PLOT USING A HARVESTING MACHINE |
| IT1396699B1 (en) | 2009-11-19 | 2012-12-14 | Unitec Spa | IMPROVED PLANT FOR CLEANING CONTAINERS FOR VEGETABLE PRODUCTS. |
| US8812149B2 (en) | 2011-02-24 | 2014-08-19 | Mss, Inc. | Sequential scanning of multiple wavelengths |
| MX366016B (en) * | 2013-11-01 | 2019-06-24 | Tomra Sorting Nv | Method and apparatus for detecting matter. |
| CN104542878A (en) * | 2014-12-05 | 2015-04-29 | 中国农业大学 | System and method for detecting and removing deteriorated meat online |
| TWI635278B (en) * | 2017-06-02 | 2018-09-11 | 劉茂誠 | Non-invasive detecting apparatus for fruits , and ranking method thereof |
| WO2019039329A1 (en) * | 2017-08-22 | 2019-02-28 | 株式会社イシダ | Optical inspection apparatus and abnormality detection method |
| CN112986174A (en) * | 2021-02-03 | 2021-06-18 | 佛山一本农业科技有限公司 | Near infrared spectrum-based fruit and vegetable optimal sorting method and system and readable storage medium |
| CN113390833A (en) * | 2021-06-23 | 2021-09-14 | 长江师范学院 | Crisp plum maturity judging method based on multiple detection modes |
Family Cites Families (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3675769A (en) * | 1971-02-03 | 1972-07-11 | Colorado State Univ Research F | Method and apparatus for separating potatoes from stones and soil clods |
| US3773172A (en) * | 1972-03-21 | 1973-11-20 | Research Corp | Blueberry sorter |
| NL7808355A (en) * | 1977-08-18 | 1979-02-20 | Elbicon Electronics Pvba | DEVICE FOR DETECTING FOREIGN OBJECTS BETWEEN LOOSE VEGETABLES. |
| US4146135A (en) * | 1977-10-11 | 1979-03-27 | Fmc Corporation | Spot defect detection apparatus and method |
| FR2430272A1 (en) * | 1978-07-06 | 1980-02-01 | Blitz Electricite | Removal of stones etc. from conveyed food prod. esp. beans - by diversion traps operated by detection of different reflectance |
| US4279346A (en) * | 1978-12-12 | 1981-07-21 | Southeastern Blueberry Council, Inc. | Asynchronous blueberry sorter |
| US4634881A (en) * | 1982-11-09 | 1987-01-06 | Supernova Systems, Inc. | Apparatus for detecting impurities in translucent bodies |
| US4723659A (en) * | 1985-06-28 | 1988-02-09 | Supernova Systems, Inc. | Apparatus for detecting impurities in translucent bodies |
| SE8602298D0 (en) * | 1986-05-21 | 1986-05-21 | Agec Ab | METHOD AND DEVICE FOR SORTING A PRODUCT FLOW |
| US5085325A (en) * | 1988-03-08 | 1992-02-04 | Simco/Ramic Corporation | Color sorting system and method |
| JPH01301147A (en) * | 1988-05-28 | 1989-12-05 | Mitsui Mining & Smelting Co Ltd | Method and device for measuring quality of vegitable and fruit |
| US5141110A (en) * | 1990-02-09 | 1992-08-25 | Hoover Universal, Inc. | Method for sorting plastic articles |
| US5134291A (en) * | 1991-04-30 | 1992-07-28 | The Dow Chemical Company | Method for sorting used plastic containers and the like |
| NL9200236A (en) * | 1992-02-07 | 1993-09-01 | Aweta Bv | METHOD AND APPARATUS FOR MEASURING THE COLOR DISTRIBUTION OF AN ARTICLE |
| US5440127A (en) * | 1993-05-17 | 1995-08-08 | Simco/Ramic Corporation | Method and apparatus for illuminating target specimens in inspection systems |
| US5464981A (en) * | 1993-05-17 | 1995-11-07 | Simco/Ramic Corporation | Methods of separating selected items from a mixture including raisins and the selected items |
-
1996
- 1996-10-23 US US08/735,730 patent/US5808305A/en not_active Expired - Fee Related
-
1997
- 1997-10-22 CA CA002269330A patent/CA2269330A1/en not_active Abandoned
- 1997-10-22 JP JP10519605A patent/JP2001502804A/en active Pending
- 1997-10-22 EP EP97912859A patent/EP0932458A1/en not_active Withdrawn
- 1997-10-22 AU AU49941/97A patent/AU718972B2/en not_active Ceased
- 1997-10-22 WO PCT/US1997/019095 patent/WO1998017406A1/en not_active Application Discontinuation
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| WO1998017406B1 (en) | Uniform, high intensity light projector suitable for use in machine vision applications | |
| AU718972B2 (en) | Uniform, high intensity light projector suitable for use in machine vision applications | |
| CA2697636C (en) | Sorting device with a broad spectrum light source and according method | |
| EP0665951B1 (en) | Process and device for inspection of a transparent material | |
| JP3036733B2 (en) | Defect detection device for transparent objects | |
| WO1998052025A1 (en) | Surface inspection instrument and surface inspection method | |
| JP2001507803A (en) | Lighting method and apparatus for machine vision of objects | |
| EP0747664A2 (en) | Method for measuring the degree of bending in a bent glass sheet | |
| KR850008217A (en) | Defect Detection Method in Transparent Objects | |
| JP2002214158A (en) | Defect detecting method and detecting device for transparent plate-like body | |
| JP2002039952A (en) | Apparatus and method for inspecting defect | |
| US20090201368A1 (en) | Glazing inspection | |
| US20240085342A1 (en) | Glass inspection | |
| JPH07253401A (en) | Method and apparatus for inspecting surface | |
| EP1126273A1 (en) | Method and arrangement for inspecting a transparent object for flaws | |
| JPH10185828A (en) | Method and device for inspecting defect of transparent flat body surface | |
| JP7126011B2 (en) | Transmission optical system inspection device | |
| CA2370240A1 (en) | Fiber-optic light line for use in an inspection system | |
| Affeldt et al. | Illumination methods for automated produce inspection: Design considerations | |
| JPH09250908A (en) | Inspection device | |
| JPS56118647A (en) | Flaw inspecting apparatus | |
| KR0160369B1 (en) | Method and apparatus for detecting hydroxy radical in preform | |
| FR2798995A1 (en) | Glass bottle inspection system | |
| JP2003240726A (en) | Defect detector for sheet | |
| JP2000171402A (en) | Method and apparatus for inspecting surface of metal |