Patent EP0243974A2 successfully refreshed from Google Patents.
EP0243974A2
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EP
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Scanner set-up simulation apparatus
Assignee: Toppan Inc
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Filing: 1987-04-30
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Granted: —
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Expires: 2007-04-30
Abstract
Abstract A scanner set-up simulation unit (110) is connected to a color scanner (20) which comprises a reading head (32) for reading an image information of the color original (2) wound on a reading drum (30) and for producing color separation signals, a first gradation correction circuit (44) for correcting a gradation of the color separation signals, and an exposure head (66) for exposing color separation films (6) wound on a recording drum (70) based on the corrected color separation signals output from the first gradation correcting circuit (44). The simulation unit (110) comprises a level adjusting circuit (120) for adjusting the white and black levels of the color separation signals, an IC memory (142) for storing the color separation signals from the level adjusting circuit (120), a second gradation correction circuit (146) for correcting a gradation of the color separation signals read out from the IC memory (142), and a color display (152) for simulating and displaying a printed reproduction based on the corrected color separation signals from the second correcting means (144). After the gradation correction is ended, the corrected color separation signals from the second correcting means (144) are supplied to the exposure head (66) of the color scanner (20).
Inventors
- 👤 Tetsuji Utsuda
- 👤 Taketo Sato
- 👤 Takeo Onga
- 👤 Hideo Sugimoto
- 👤 Yasuo Oki
- 👤 Tuyoshi Suwa
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 11:36
CPC Classifications
H; H04; H04N; H04N1/00; H04N1/46; H04N1/56; H04N1/60; H04N1/6011
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
107 words
A scanner set-up simulation apparatus, which is connected to a color scanner (20) for color-separating a color original (2) for a color printing, for producing color separation signals, and for forming color separation films (6) based on the color separation signals, characterized by comprising: means (120) for receiving the color separation signals from the color scanner (20); means (142) for storing the received color separation signals; means (146) for correcting a color-separation condition of the color separation signals read out from said storing means (142), said condition including at least gradation; and means (152) for simulating and displaying a printed reproduction based.on the corrected color separation signals.
Claim 2
Dependent Claim
107 words
A scanner set-up simulation apparatus, which is connected to a color scanner (20) for color-separating a color original (2) for a color printing, for producing color separation signals, and for forming color separation films (6) based on the color separation signals, characterized by comprising: means (120) for receiving the color separation signals from the color scanner (20); means (142) for storing the received color separation signals; means (146) for correcting a color-separation condition of the color separation signals read out from said storing means (142), said condition including at least gradation; and means (152) for simulating and displaying a printed reproduction based.on the corrected color separation signals.
Claim 3
Dependent Claim
56 words
An apparatus according to claim 1, characterized by further comprising means (180, 182) for bypassing said storing means (142) thereby the received color separation signals are directly supplied to said correcting means (146) and means (184) for supplying the corrected color separation signals to the color separation film exposing section (62) of said color scanner (20).
Claim 4
Dependent Claim
65 words
An apparatus according to claim 1, characterized by further comprising means (124), connected between said receiving means (120) and said storing means (142), for averaging said received color separation signals, an averaging process being in accordance with a size of said color original (2) and a diameter of a reading drum (30) of said color scanner (20) to which the color original (2) is wound.
Claim 5
Dependent Claim
81 words
An apparatus according to claim 3, characterized in that said averaging means (124) comprises a low-pass filter whose cut-off frequency is determined in accordance with the size of said color original (2) and the diameter of the reading drum (30) and means (140) for sampling an output signal of said low-pass filter (124), a sampling frequency of said sampling means (140) being determined in accordance with the size of said color original (2) and the diameter of the reading drum (30).
Claim 6
Dependent Claim
35 words
An apparatus according to claim 1, characterized in that said receiving means (120) comprises means (172) for adjusting a white level and a black level of said color separation signals from said color scanner (20).
Claim 7
Dependent Claim
55 words
An apparatus according to claim 5, characterized in that said receiving means (120) comprises an oscilloscope (160) for monitoring the white level and the black level of said color separation signals and means (176, 178), connected between said adjusting means (172) and said oscilloscope (160), for increasing a repetition rate of said color separation signals.
Claim 8
Dependent Claim
61 words
An apparatus according to claim 1, characterized in that said storing means (142) comprises: memory means (142) for storing the color separation signals of one frame; and address controller means (126) for controlling a write address and a read address of said memory means (142) according to a rotation mode, thereby the simulated color print is displayed in a rotated manner.
Claim 9
Dependent Claim
196 words
A scanner set-up simulation system characterized by comprising: color scanner means (20) for color-separating a color original for printing; and simulation unit means (110), connected to said color scanner means (20), for simulating and displaying a printed reproduction, said color scanner means (20) comprising: reading means (32) for reading an image information of a color original (2) and for reading an image information of a color original (2) and for producing color separation signals; first correcting means (44) for correcting a color-separation condition of the color separation signals, said condition including at least gradation; and means (66) for exposing color separation films (6) based on the corrected color separation signals output from said first correcting means (44), and said simulation unit means (110) comprising: means (120) for receiving the color separation signals from said correcting means (44); means (142) for storing the received color separation signals; second correcting means (146) for correcting a color-separation condition of the color separation signals read out from said storing means (142), said condition including at least gradation; and means (152) for simulating and displaying a printed reproduction based on the corrected color separation signals from said second correcting means (144).
Claim 10
Dependent Claim
196 words
A scanner set-up simulation system characterized by comprising: color scanner means (20) for color-separating a color original for printing; and simulation unit means (110), connected to said color scanner means (20), for simulating and displaying a printed reproduction, said color scanner means (20) comprising: reading means (32) for reading an image information of a color original (2) and for reading an image information of a color original (2) and for producing color separation signals; first correcting means (44) for correcting a color-separation condition of the color separation signals, said condition including at least gradation; and means (66) for exposing color separation films (6) based on the corrected color separation signals output from said first correcting means (44), and said simulation unit means (110) comprising: means (120) for receiving the color separation signals from said correcting means (44); means (142) for storing the received color separation signals; second correcting means (146) for correcting a color-separation condition of the color separation signals read out from said storing means (142), said condition including at least gradation; and means (152) for simulating and displaying a printed reproduction based on the corrected color separation signals from said second correcting means (144).
Claim 11
Dependent Claim
71 words
An apparatus according to claim 8, characterized in that said simulation unit means (110) further comprises means (180, 182) for bypassing said storing means (142) thereby the received color separation signals are directly supplied to said correcting means (1 4 6) and means (184) for supplying the corrected color separation signals output from said second correcting means (146) to the color separation film exposing section (62) of said color scanner (20).
Claim 12
Dependent Claim
72 words
An apparatus according to claim 8, characterized in that said simulation unit means (110) further comprises means (124), connected between said receiving means (120) and said storing means (142), for averaging said received color separation signals, an averaging process being in accordance with a size of said color original (2) and a diameter of a reading drum (30) of said color scanner means (20) to which the color original (2) is wound.
Claim 13
Dependent Claim
81 words
An apparatus according to claim 10, characterized in that said averaging means (124) comprises a low-pass filter whose cut-off frequency is determined in accordance with the size of said color original (2) and the diameter of the reading drum (30) and means (140) for sampling an output signal of said low-pass filter (124), a sampling frequency of said sampling means (140) being determined in accordance with the size of said color original (2) and the diameter of the reading drum (30).
Claim 14
Dependent Claim
35 words
An apparatus according to claim 8, characterized in that said receiving means (120) comprises means (172) for adjusting a white level and a black level of said color separation signals from said color scanner (20).
Claim 15
Dependent Claim
55 words
An apparatus according to claim 12, characterized in that said receiving means (120) comprises an oscilloscope (160) for monitoring the white level and the black level of said color separation signals and means (176, 178), connected between said adjusting means (172) and said oscilloscope (160), for increasing a repetition rate of said color separation signals.
Claim 16
Dependent Claim
63 words
An apparatus according to claim 8, characterized in that said storing means (1 4 2) comprises: memory means (142) for storing the color separation signals of one frame; and address controller means (126) for controlling a write address and a read address of said memory means (142) according to a rotation mode, thereby the simulated color print is displayed in a rotated manner.
Claim 17
Dependent Claim
90 words
An apparatus according to claim 8, characterized in that said color scanner means (20) further comprises a rotating drum (30) on which the color original (2) is wound and a photo-electric head (32) for shifting a predetermined pitch in an axial direction of said rotating drum (30) for each rotation of said rotating drum (30), the pitch being determined by a size and an aspect ratio of said color original (2) and a rotation mode representing whether or not said simulated printed reproduction is displayed with an inverted aspect ratio.
Claim 18
Dependent Claim
67 words
An apparatus according to claim 8, characterized in that said color scanner means (20) further comprises a calibration circuit (38) connected to said reading means (32), a masking circuit (40) connected to said calibration circuit (38), and an under color removal circuit (42) connected to said masking circuit (40), an output signal from said under color removal circuit (42) being supplied to said first correcting means (44).
References Cited (Backward Citations)
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