US4736244A
Expired / Lapsed
US
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Color film inspection system and data output method therefor
Assignee: Fujifilm Holdings Corp
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Filing: 1987-06-18
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Granted: 1988-04-05
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Expires: 2007-06-18
Abstract
Abstract The conventional color film inspection system requires an FSS or photo-multipliers, which tends to make the system complicated and costly. Unless the displayed imaged on a monitor display and the actually printed picture are accurately matched, even if the displayed images are correct, the printed images are not always satisfactory. This invention can offer a color film inspection system which is low in price, excellent in S/N ratio, simple in construction and yet excellent in precision.
Inventors
- 👤 Kazuo Shiota
- 👤 Hitoshi Urabe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:51
CPC Classifications
H; H04; H04N; H04N1/00; H04N1/46; H04N1/56; H04N1/60; H04N1/6011; G; G03; G03B; G03B27/00; G03B27/72; G03B27/73; G03B27/735; H04N1/40; H04N1/407; H04N1/4072
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
163 words
A color film inspection system comprising an image pickup device which picks up color original images to be inspected, an input light amount control device which controls the amount of input light to said image pickup device for said color original images, a converting means which converts video signals from said image pickup device into ditial values and then into density signals, a color correction circuit corrects in color the output from said converting means, a gradation converting means which independently converts in gradation the three primary color signals from said color circuit, and a color monitor means which converts the outputs of said gradation converting means into analog values and displays the same, whereby the luminance of the images displayed on said color monitor means is adjusted by the amount of input light, and the color balance is adjusted by the shift of a data table of said gradation converting means, said adjustments being conducted independently of and separately from each other.
Claim 2
Dependent Claim
163 words
A color film inspection system comprising an image pickup device which picks up color original images to be inspected, an input light amount control device which controls the amount of input light to said image pickup device for said color original images, a converting means which converts video signals from said image pickup device into ditial values and then into density signals, a color correction circuit corrects in color the output from said converting means, a gradation converting means which independently converts in gradation the three primary color signals from said color circuit, and a color monitor means which converts the outputs of said gradation converting means into analog values and displays the same, whereby the luminance of the images displayed on said color monitor means is adjusted by the amount of input light, and the color balance is adjusted by the shift of a data table of said gradation converting means, said adjustments being conducted independently of and separately from each other.
Claim 3
Dependent Claim
22 words
A color film inspection system as claimed in claim 1, wherein said input light amount control means includes a light control unit.
Claim 4
Dependent Claim
40 words
A color film inspection system as claimed in claim 2, wherein said color original images are placed on a mirror box so that the light transmitting through said light control unit illuminates said color original images via the mirror box.
Claim 5
Dependent Claim
23 words
A color film inspection system as claimed in claim 1, wherein said converting means comprises an A/D converter and a logrithmic converting circuit.
Claim 6
Dependent Claim
26 words
A color film inspection system as claimed in claim 1, wherein said pickup device is a TV camera and said color monitor means is a CRT.
Claim 7
Dependent Claim
151 words
A color film inspection system comprising a TV camera which picks up images of color original images to be inspected, a light control unit which controls the amount of light emitted from a light source upon the color original images for said TV camera, a logartihmic converting circuit which converts video signals from said TV camera into digital values and then into density signals, a color correction circuit which corrects in color said density signals, a look-up table which independently converts in gradation three primary color signals from said color correction circuit, a color monitor means which converts the output from said look-up table into analog values and displays the same, and a controlling means which controls the amount of light at said light source, the aperture of said light control unit, the magnification of said TV camera, said logarithmic converting circuit, said color correction circuit and said look-up table respectively.
Claim 8
Dependent Claim
151 words
A color film inspection system comprising a TV camera which picks up images of color original images to be inspected, a light control unit which controls the amount of light emitted from a light source upon the color original images for said TV camera, a logartihmic converting circuit which converts video signals from said TV camera into digital values and then into density signals, a color correction circuit which corrects in color said density signals, a look-up table which independently converts in gradation three primary color signals from said color correction circuit, a color monitor means which converts the output from said look-up table into analog values and displays the same, and a controlling means which controls the amount of light at said light source, the aperture of said light control unit, the magnification of said TV camera, said logarithmic converting circuit, said color correction circuit and said look-up table respectively.
Claim 9
Dependent Claim
22 words
A color film inspection system as claimed in claim 6, wherein said control means includes a keyboard and a data output device.
Claim 10
Dependent Claim
22 words
A color film inspection system as claimed in claim 7, wherein said data output device records the data on a magnetic disc.
Claim 11
Dependent Claim
135 words
A data output method for a color film inspection system which displays color film original images on a display unit of the film inspection system, evaluates and inspects the displayed images, converts the inspection data of said color film original images into exposure of the three colors of RGB of a photographic color printer and outputs the same, which is characterized in that the method comprises the steps of obtaining the amount as said inspection data which does not depend on the photographic color printer, and correcting the filtering amount of said photographic color printer which can be induced there with the transmittance of a filter which is sensed by each color sensitive layer of a color paper for printing so that said inspected film original images are printed optimally by said photographic color printer.
Claim 12
Dependent Claim
135 words
A data output method for a color film inspection system which displays color film original images on a display unit of the film inspection system, evaluates and inspects the displayed images, converts the inspection data of said color film original images into exposure of the three colors of RGB of a photographic color printer and outputs the same, which is characterized in that the method comprises the steps of obtaining the amount as said inspection data which does not depend on the photographic color printer, and correcting the filtering amount of said photographic color printer which can be induced there with the transmittance of a filter which is sensed by each color sensitive layer of a color paper for printing so that said inspected film original images are printed optimally by said photographic color printer.
Claim 13
Dependent Claim
20 words
A data output method for color film inspection as claimed in claim 9, wherein said filter is a cut filter.
Claim 14
Dependent Claim
44 words
A data output method for color film inspection as claimed in claim 10, wherein the spectral characteristic of said cut filter is measured, and the result is multiplied with the spectral characteristic of said color paper to obtain the transmittance of said cut filter.
Claim 15
Dependent Claim
39 words
A data output method for color film inspection as claimed in claim 10, wherein several combinations of printing time and printing density are measured and the transmittance of said cut filter is obtained based upon the above measured values.
Claim 16
Dependent Claim
108 words
A data output method in a color film inspection system which displays color film original images on a display unit, evaluates and inspects the displayed images, converts inspected data of said color film original images into exposure amounts of three colors of RGB of a photographic color printer and outputs the same, which comprises the steps of: correcting sensitivity of a color paper to be printed for the inspected data which is caused by the reciprocity law failure in accordance with the degree of standard, over- or under-exposure of the color film original images; and optimally printing said inspected color film original images by said photographic color printer.
Claim 17
Dependent Claim
108 words
A data output method in a color film inspection system which displays color film original images on a display unit, evaluates and inspects the displayed images, converts inspected data of said color film original images into exposure amounts of three colors of RGB of a photographic color printer and outputs the same, which comprises the steps of: correcting sensitivity of a color paper to be printed for the inspected data which is caused by the reciprocity law failure in accordance with the degree of standard, over- or under-exposure of the color film original images; and optimally printing said inspected color film original images by said photographic color printer.
Claim 18
Dependent Claim
55 words
A data output method in a color film inspection system as claimed in claim 13, further including the steps of measuring a relation between a printing time and a printing density by changing the amount of light received on said color paper and correcting the sensitivity of the color paper based upon said measured relation.
Claim 19
Dependent Claim
98 words
A data output method in a color film inspection system which displays color film original images on a display unit, evaluates and inspects the displayed images and converts inspected data of said color film original images into exposure amounts of three colors of RGB of anarbitrary photographic color printer and outputs the same, which comprises the steps of: correcting color slope characteristics of said color film inspection system in accordance with the degree of standard, over- or under-exposure of said color film original images; and optimally printing said inspected color film original images by said photographic color printer.
Claim 20
Dependent Claim
98 words
A data output method in a color film inspection system which displays color film original images on a display unit, evaluates and inspects the displayed images and converts inspected data of said color film original images into exposure amounts of three colors of RGB of anarbitrary photographic color printer and outputs the same, which comprises the steps of: correcting color slope characteristics of said color film inspection system in accordance with the degree of standard, over- or under-exposure of said color film original images; and optimally printing said inspected color film original images by said photographic color printer.
Claim 21
Dependent Claim
62 words
A data output method in a color film inspection system as claimed in claim 15, further including the steps of preparing a sloped negative film, obtaining an optimum inspection result, of said sloped negative film; printing said sloped negative film, obtaining an optimum ptinting time, and determining and correcting matrix coefficients of said color slope characteristics in accordance with the above relations.
Claim 22
Dependent Claim
56 words
A data output method in a color film inspection system as claimed in claim 15, further including the steps of inspecting a large number of commercial negative films by the color film inspection system, printing said commercial negative films, analyzing tendency of the printed films and determining matrix coefficients of the color slope characteristics for correction.
Claim 23
Dependent Claim
162 words
A data output method in a color film inspection system which displays color film original images on a display unit, evaluates and inspects the displayed images and converts inspected data of said color film original images into exposure amounts of three colors of RGB of an arbitrary photographic color printer and outputs the same, which comprises the steps of; obtaining a value as said inspected data which does not depend on a photographic color printer; correcting filtering amount of said photographic color printer which is predetermined by said value with transmission factor of a filter sensed by each color sensitive layer of a color paper to be printed; and correcting color slope characteristics of the color film inspection system as well as sensitivity due to reciprocity law failure on said color paper in correspondence to the degree of standard, over- or under-exposure of said color film original images; thereby to optimally print said inspected film original images by said photographic color printer.
Claim 24
Dependent Claim
162 words
A data output method in a color film inspection system which displays color film original images on a display unit, evaluates and inspects the displayed images and converts inspected data of said color film original images into exposure amounts of three colors of RGB of an arbitrary photographic color printer and outputs the same, which comprises the steps of; obtaining a value as said inspected data which does not depend on a photographic color printer; correcting filtering amount of said photographic color printer which is predetermined by said value with transmission factor of a filter sensed by each color sensitive layer of a color paper to be printed; and correcting color slope characteristics of the color film inspection system as well as sensitivity due to reciprocity law failure on said color paper in correspondence to the degree of standard, over- or under-exposure of said color film original images; thereby to optimally print said inspected film original images by said photographic color printer.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-04-05 | 1991-10-05 | 1992-04-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-04-05 | 1995-10-05 | 1996-04-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-04-05 | 1999-10-05 | 2000-04-05 | $7700.00 | Window Closed / Lapsed |