EP0131430A2
Expired / Lapsed
EP
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Image processing apparatus
Assignee: Fujifilm Holdings Corp
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Filing: 1984-07-04
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Granted: —
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Expires: 2004-07-04
Abstract
Abstract An image processing apparatus comprises positive (2) and negative (3) original input signal processing sections respectively converting positive and negative signals obtained by photoelectric scanning of positive and negative originals into positive density signals, and a color processing section (4) for color-processing the positive density signals. The apparatus also has a positive imnage output section (5) for converting the output signal of the color processing section (4) into a control signal operating a light source (7) to reproduce a positive image, and a negative image output section (6) for converting the output signal of the color processing section (4) into a negative density signal and then into a control signal operating light source (7) to form an intermediate negative from which a positive image of desired density can subsequently be obtained on a photosensitive material.
Inventors
- 👤 Hitoshi Urabe
- 👤 Osamu Shimazaki
- 👤 Takao Shigaki
- 👤 Kohji Takahashi
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-26 01:01
CPC Classifications
H; H04; H04N; H04N1/00; H04N1/46; H04N1/56; H04N1/60
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
354 words
An image processing apparatus adapted to negatives and positives, which comprises i) a positive original input signal processing section for converting a positive image signal obtained by photoelectric scanning of a positive original into a density signal representing a positive image, ii) a negative original input signal processing section for converting a negative image signal obtained by photoelectric scanning of a negative original into a density signal representing a positive image, iii) a color processing section provided with processing means such as a gradation conversion means, a color correction means and a sharpness enhancement means for conducting color processings of said density signal representing a positive image which is input from said positive original input signal processing section or said negative original input signal processing section so that a desired density is obtained on an output photosensitive material or an ultimate printing photosensitive material and for sending out the color-processed density signal representing a positive image as an output signal, iv) a positive image output section for converting said output signal of said color processing section into a light amount control signal for a light source emitting light to which an output photosensitive material for forming a positive image is exposed, and for sending out said light amount control signal, and v) a negative image output section for converting said output signal of said color processing section into a density signal representing a negative image, converting said density signal representing a negative image into a light amount control signal for a light source emitting light to which a photosensitive material for forming an intermediate negative is exposed, and then sending out said light amount control signal, said negative image output section converting said output signal of said color processing section into said density signal representing a negative image so that the density of a negative image obtained by exposing said photosensitive material for forming an intermediate negative on the basis of said light amount control signal sent out from said negative image output section is such that said desired density is obtained when said negative image is printed on the ultimate printing photosensitive material.
Claim 2
Dependent Claim
354 words
An image processing apparatus adapted to negatives and positives, which comprises i) a positive original input signal processing section for converting a positive image signal obtained by photoelectric scanning of a positive original into a density signal representing a positive image, ii) a negative original input signal processing section for converting a negative image signal obtained by photoelectric scanning of a negative original into a density signal representing a positive image, iii) a color processing section provided with processing means such as a gradation conversion means, a color correction means and a sharpness enhancement means for conducting color processings of said density signal representing a positive image which is input from said positive original input signal processing section or said negative original input signal processing section so that a desired density is obtained on an output photosensitive material or an ultimate printing photosensitive material and for sending out the color-processed density signal representing a positive image as an output signal, iv) a positive image output section for converting said output signal of said color processing section into a light amount control signal for a light source emitting light to which an output photosensitive material for forming a positive image is exposed, and for sending out said light amount control signal, and v) a negative image output section for converting said output signal of said color processing section into a density signal representing a negative image, converting said density signal representing a negative image into a light amount control signal for a light source emitting light to which a photosensitive material for forming an intermediate negative is exposed, and then sending out said light amount control signal, said negative image output section converting said output signal of said color processing section into said density signal representing a negative image so that the density of a negative image obtained by exposing said photosensitive material for forming an intermediate negative on the basis of said light amount control signal sent out from said negative image output section is such that said desired density is obtained when said negative image is printed on the ultimate printing photosensitive material.
Claim 3
Dependent Claim
81 words
An apparatus as defined in Claim 1 wherein said negative original input signal processing section converts said negative image signal into said density signal representing a positive image so that the weight ratio of Y, M and C primary color signals is always 1:1:1, and said positive original input signal processing section converts said positive image signal into said density signal representing a positive image so that the weight ratio of Y, M and C primary color signals is always 1:1:1.
Claim 4
Independent Claim
32 words
An apparatus as defined in either of claims 1 and 2 wherein said positive original input signal processing section and said negative original input signal processing section are constituted by common circuits.
Claim 5
Independent Claim
29 words
An apparatus as defined in any one of claims 1 to 3 wherein said positive image output section and said negative image output section are constituted by common circuits.
Claim 6
Independent Claim
61 words
An apparatus for processing an input signal of a negative original, which comprises means for converting a negative original density signal detected by photoelectrically scanning the negative original into a density signal representing a corresponding positive image so that the weight ratio of three primary colours of said density signal representing a positive image is always equal to a predetermined ratio.
Claim 7
Independent Claim
61 words
An apparatus for processing an input signal of a negative original, which comprises means for converting a negative original density signal detected by photoelectrically scanning the negative original into a density signal representing a corresponding positive image so that the weight ratio of three primary colours of said density signal representing a positive image is always equal to a predetermined ratio.
Claim 8
Dependent Claim
76 words
An apparatus as defined in claim 5 wherein said means for converting a negative original density signal comprises means for converting said negative original density signal into a corrected negative density signal corresponding to the density signal that would be obtained by recording with a correct exposure, and for subsequently converting said corrected negative density signal into a positive density signal wherein the weight ratio of the three primary colors is equal to a predetermined ratio.
Claim 9
Dependent Claim
13 words
An apparatus as defined in claim 6 wherein said predetermined ratio is 1:1:1.
Claim 10
Independent Claim
78 words
An apparatus for processing an image signal for positive-to-negative conversion in an image output system, which comprises means for converting a density signal representing a positive image suitable for controlling the production of a positive image on a photosensitive material into a modified density signal suitable for controlling the production of a negative image on a photosensitive material, from which negative image a positive image of the desired density may subsequently be produced on a subsequent photosensitive material.
Claim 11
Independent Claim
78 words
An apparatus for processing an image signal for positive-to-negative conversion in an image output system, which comprises means for converting a density signal representing a positive image suitable for controlling the production of a positive image on a photosensitive material into a modified density signal suitable for controlling the production of a negative image on a photosensitive material, from which negative image a positive image of the desired density may subsequently be produced on a subsequent photosensitive material.
Claim 12
Dependent Claim
39 words
An apparatus as defined in claim 8 comprising means for converting said positive density signal into a printing density signal for said subsequent photosensitive material, and means for subsequently converting said printing density signal into said modified density signal.
Claim 13
Dependent Claim
49 words
An apparatus as defined in claim 9 wherein conversion of said positive density signal into said printing density signal is achieved by use of a table memory, and wherein conversion of said printing density signal into said modified density signal is achieved by the application of matrix calculation thereto.
Claim 14
Dependent Claim
345 words
An image processing apparatus adapted for the processing of negative and positive images, which comprises: i) a positive original input signal processing section (2) for converting a positive image signal obtained by photoelectric scanning of a positive original into a density signal representing a positive image; ii) a negative original input signal processing section (3) for converting a negative image signal obtained by photoelectric scanning of a negative original into a density signal representing a positive image; iii) a color processing section (4) provided with processing means for conducting color processing of said density signal representing a positive image from said positive or said negative original input signal processing section and for producing as an output signal a color-processed density signal capable of being converted into a positive image on a photosensitive material or alternatively into an intermediate negative image on a photosensitive material which intermediate negative image is capable of subsequent conversion into a positive image on a photosensitive material, said positive image on a photosensitive material in either case having a desired density; iv) a positive image output section (5) for converting said output signal of said color processing section into a control signal for a light emitting source (7) which emits light to which a photosensitive material capable of having formed thereon a positive image is exposed; v) a negative image output section (6) for converting said output signal of said color processing section into a density signal representing a negative image, for converting said density signal representing a negative image into a control signal for a light emitting source (7) which emits light to which a photosensitive material capable of having formed thereon a negative image is exposed; and vi) selection means whereby said color processing section may be caused to color process the density signal representing a positive image output by either of said positive and negative original input signal processsing sections and whereby the color-processed density signal output by said color processing section may be caused to be processed by either of said positive and negative image output sections.
Claim 15
Dependent Claim
345 words
An image processing apparatus adapted for the processing of negative and positive images, which comprises: i) a positive original input signal processing section (2) for converting a positive image signal obtained by photoelectric scanning of a positive original into a density signal representing a positive image; ii) a negative original input signal processing section (3) for converting a negative image signal obtained by photoelectric scanning of a negative original into a density signal representing a positive image; iii) a color processing section (4) provided with processing means for conducting color processing of said density signal representing a positive image from said positive or said negative original input signal processing section and for producing as an output signal a color-processed density signal capable of being converted into a positive image on a photosensitive material or alternatively into an intermediate negative image on a photosensitive material which intermediate negative image is capable of subsequent conversion into a positive image on a photosensitive material, said positive image on a photosensitive material in either case having a desired density; iv) a positive image output section (5) for converting said output signal of said color processing section into a control signal for a light emitting source (7) which emits light to which a photosensitive material capable of having formed thereon a positive image is exposed; v) a negative image output section (6) for converting said output signal of said color processing section into a density signal representing a negative image, for converting said density signal representing a negative image into a control signal for a light emitting source (7) which emits light to which a photosensitive material capable of having formed thereon a negative image is exposed; and vi) selection means whereby said color processing section may be caused to color process the density signal representing a positive image output by either of said positive and negative original input signal processsing sections and whereby the color-processed density signal output by said color processing section may be caused to be processed by either of said positive and negative image output sections.
Claim 16
Dependent Claim
15 words
An apparatus as defined in claim 11 and any one of claims 1 to 10.
References Cited (Backward Citations)
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