GB1458358A - Method and apparatus for colour inspection - Google Patents
Method and apparatus for colour inspectionInfo
- Publication number
- GB1458358A GB1458358A GB565573A GB565573A GB1458358A GB 1458358 A GB1458358 A GB 1458358A GB 565573 A GB565573 A GB 565573A GB 565573 A GB565573 A GB 565573A GB 1458358 A GB1458358 A GB 1458358A
- Authority
- GB
- United Kingdom
- Prior art keywords
- colour
- area
- signal
- test pattern
- representing
- 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.)
- Expired
Links
- 238000000034 method Methods 0.000 title abstract 4
- 238000007689 inspection Methods 0.000 title 1
- 230000005855 radiation Effects 0.000 abstract 3
- 239000003086 colorant Substances 0.000 abstract 2
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 abstract 1
- 230000003321 amplification Effects 0.000 abstract 1
- 230000000295 complement effect Effects 0.000 abstract 1
- 238000001514 detection method Methods 0.000 abstract 1
- 238000005259 measurement Methods 0.000 abstract 1
- 238000003199 nucleic acid amplification method Methods 0.000 abstract 1
- 230000003287 optical effect Effects 0.000 abstract 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
- G01J3/46—Measurement of colour; Colour measuring devices, e.g. colorimeters
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
- G01J3/46—Measurement of colour; Colour measuring devices, e.g. colorimeters
- G01J3/465—Measurement of colour; Colour measuring devices, e.g. colorimeters taking into account the colour perception of the eye; using tristimulus detection
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J1/00—Photometry, e.g. photographic exposure meter
- G01J1/02—Details
- G01J1/04—Optical or mechanical part supplementary adjustable parts
- G01J1/0407—Optical elements not provided otherwise, e.g. manifolds, windows, holograms, gratings
- G01J1/044—Optical elements not provided otherwise, e.g. manifolds, windows, holograms, gratings using shutters
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
- G01J3/46—Measurement of colour; Colour measuring devices, e.g. colorimeters
- G01J2003/466—Coded colour; Recognition of predetermined colour; Determining proximity to predetermined colour
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
- G01J3/46—Measurement of colour; Colour measuring devices, e.g. colorimeters
- G01J3/50—Measurement of colour; Colour measuring devices, e.g. colorimeters using electric radiation detectors
- G01J3/51—Measurement of colour; Colour measuring devices, e.g. colorimeters using electric radiation detectors using colour filters
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
- G01J5/02—Constructional details
- G01J5/08—Optical arrangements
- G01J5/0803—Arrangements for time-dependent attenuation of radiation signals
- G01J5/0805—Means for chopping radiation
Landscapes
- Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- General Physics & Mathematics (AREA)
- Inking, Control Or Cleaning Of Printing Machines (AREA)
Abstract
1458358 Measuring colour photo-electrically SIRA INSTITUTE Ltd 26 Feb 1974 [5 Feb 1973] 5655/73 Heading G1A A test pattern is inspected by comparing, for a selected area, a signal representing the achromatic radiation from that area with a first reference signal and, with the use of further reference signals representing the desired colour of that area, determining the acceptability of the colour of the test pattern. A signal S i representing the general achromatic radiation received from a given area "i" of a test pattern is compared with a first reference signal W i representing achromatic radiation received from a corresponding area of a master pattern, an error signal (S i -W i ) indicating that at least one primary colour component of that area of the test pattern is incorrect, e.g. red, green or blue ink applied in a colour printing process. It is stated that mutually cancelling errors in two or more colour components of a given area are unlikely to occur, and that the probability that such complementary errors would escape detection by the method can be made negligible by inspecting a suitable number of areas, particularly if these are chosen so that different colours predominate in respective areas. The achromatic error signal (S i -W i ), weighted by reference chromaticity co-ordinates r i , g i , b i derived for a corresponding area of the master pattern, provides signals r i (S i -W i ), g i (S i -W i ), b i (S i -W i ) from which the error in one or more colour components can be derived by computation. Optical apparatus, also described in Specification 1326881, comprises a source 1, Fig. 1, illuminating a strip-like area of an object O bearing a test pattern, a portion of the reflected image being selected by a slit S in a plate 3 for presentation to a photomultiplier tube 8 which thus provides a signal representing the average light, irrespective of colour, reflected from a narrow strip of the test pattern. A radial grating 5, further described in British Specification 970369, is arranged as a chopper to modulate the beam received by the tube 8 for convenience of signal amplification. As the object O is moved perpendicularly to the length of the slit S the tube 8 provides a variable signal which, after analogue processing at 11, 12, 16, Fig. 2, is sampled in digital form to provide signals Si. The master pattern is similarly treated to obtain signals W i but is additionally scanned with colour filters 9 to give signals representing the chromaticity co-ordinates r i , g i , b i . Each area may be scanned individually achromatically and by colours in turn; or the whole master pattern may be scanned completely four times. Signals derived from the measurements may be passed to a pen recorder 13, or to a data processor 14 controlling the printing process.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB565573A GB1458358A (en) | 1973-02-05 | 1973-02-05 | Method and apparatus for colour inspection |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB565573A GB1458358A (en) | 1973-02-05 | 1973-02-05 | Method and apparatus for colour inspection |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1458358A true GB1458358A (en) | 1976-12-15 |
Family
ID=9800149
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB565573A Expired GB1458358A (en) | 1973-02-05 | 1973-02-05 | Method and apparatus for colour inspection |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB1458358A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0011376A1 (en) * | 1978-10-13 | 1980-05-28 | Philip Emanuel Tobias | Photoelectric densitometer system |
EP0089016A1 (en) * | 1982-03-16 | 1983-09-21 | Windmöller & Hölscher | Method of automatically adjusting the colours printed by flexographic printing machines in a four-colour printing process |
US4455090A (en) * | 1979-07-26 | 1984-06-19 | The Wiggins Teape Group Limited | Apparatus for measuring surface reflectance characteristics |
CN109974625A (en) * | 2019-04-08 | 2019-07-05 | 四川大学 | A kind of color body structural light three-dimensional measurement method based on form and aspect optimization gray scale |
-
1973
- 1973-02-05 GB GB565573A patent/GB1458358A/en not_active Expired
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0011376A1 (en) * | 1978-10-13 | 1980-05-28 | Philip Emanuel Tobias | Photoelectric densitometer system |
US4455090A (en) * | 1979-07-26 | 1984-06-19 | The Wiggins Teape Group Limited | Apparatus for measuring surface reflectance characteristics |
EP0089016A1 (en) * | 1982-03-16 | 1983-09-21 | Windmöller & Hölscher | Method of automatically adjusting the colours printed by flexographic printing machines in a four-colour printing process |
US4667596A (en) * | 1982-03-16 | 1987-05-26 | Windmoller & Holscher | Method of automatically setting the colors printed out by flexographic printing machines for four-color printing |
CN109974625A (en) * | 2019-04-08 | 2019-07-05 | 四川大学 | A kind of color body structural light three-dimensional measurement method based on form and aspect optimization gray scale |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed [section 19, patents act 1949] | ||
PCNP | Patent ceased through non-payment of renewal fee |