EP0515162A2
Expired / Lapsed
EP
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Image processing method and apparatus
Assignee: Canon Inc
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Filing: 1992-05-20
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Granted: —
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Expires: 2012-05-20
Abstract
Abstract An image processing apparatus for processing gradation images is disclosed. The apparatus includes a pattern forming circuit (29) for forming a predetermined pattern on a medium, a detecting device for detecting the predetermined pattern on the medium and generating a detection signal, a processing circuit for processing input image signal in accordance with the detection signal and outputting a reproduction signal, and a setting device for manually setting an image signal processing condition of the processing circuit, thereby accomplishing the optimization of image processing.
Inventors
- 👤 Nobuatsu C/O Canon Kabushiki Kaisha Sasanuma
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-10 00:56
CPC Classifications
H; H04; H04N; H04N1/00; H04N1/46; H04N1/56; H04N1/60; H04N1/603; H04N1/6033; H04N1/40; H04N1/407; H04N1/4076; H04N1/4078
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
64 words
An image processing apparatus comprising: pattern forming means for forming a predetermined pattern on a medium; detecting means for detecting the predetermined pattern on the medium and generating a detection signal; processing means for processing input image signals in accordance with the detection signal and outputting a reproduction signal; and setting means for manually setting an image signal processing condition of said processing means.
Claim 2
Dependent Claim
17 words
An image processing apparatus according to Claim 1, wherein said pattern forming means includes a photosensitive body.
Claim 3
Dependent Claim
23 words
An image processing apparatus according to Claim 1, wherein said detecting means comprises means for irradiating near infrared light, and a CCD sensor.
Claim 4
Dependent Claim
15 words
An image processing apparatus according to Claim 1, wherein said processing means includes γ-correction means.
Claim 5
Dependent Claim
17 words
An image processing apparatus according to Claim 4, wherein said γ-correction means is composed of a look-up-table.
Claim 6
Dependent Claim
29 words
An image processing apparatus according to Claim 1, wherein said processing means processes the input image signals to obtain a plurality of chrominance component signals, and outputs reproduction signals.
Claim 7
Dependent Claim
19 words
An image processing apparatus according to Claim 6, wherein said setting means sets processing condition for said chrominance components.
Claim 8
Dependent Claim
17 words
An image processing apparatus according to Claim 1, further comprising display means for indicating the processing condition.
Claim 9
Dependent Claim
22 words
An iamge processing apparatus according to Claim 8, wherein said display means indicates processing condition every a plurality of chrominance component signals.
Claim 10
Dependent Claim
53 words
An image processing method comprising the steps of: forming a predetermined pattern on a medium; detecting the predetermined pattern on the medium and generating a detection signal; processing input image signals in accordance with the detection signal and outputting a reproduction signal; manually setting an image signal processing condition of said processing step.
Claim 11
Dependent Claim
101 words
An image processing apparatus comprising: input means for inputting image data; converting means for converting a density characteristic of the image data; generating means for generating pattern data representing a predetermined pattern; image forming means for forming an image on a recording medium in accordance with the converted image data and pattern data; detecting means for detecting the predetermined pattern on the recording medium and generating a detection signal; setting means for manually setting a parameter for conversion by said converting means; and control means for controlling conversion characteristic of said converting means based on the detection signal and the parameter.
Claim 12
Dependent Claim
21 words
An image processing apparatus according to Claim 11, wherein said input means is an image reader comprising a CCD line sensor.
Claim 13
Dependent Claim
16 words
An image processing apparatus according to Claim 11, said converting means is composed of a look-up-table.
Claim 14
Dependent Claim
23 words
An image processing apparatus according to Claim 11, wherein said detecting means comprises means for irradiating near infrared light, and a CCD sensor.
Claim 15
Dependent Claim
17 words
An image processing apparatus according to Claim 11, further comprising display means for indicating the processing condition.
Claim 16
Dependent Claim
22 words
An image processing apparatus according to Claim 15, wherein said display means indicates processing condition every a plurality of chrominance component signals.
Claim 17
Dependent Claim
105 words
An image processing apparatus comprising pattern forming means for forming a predetermined pattern on a medium, density detecting means for detecting the density of the pattern formed by said pattern forming means, and gradation control means for performing gradation control according to the density detected by said density detecting means, to be characterized in that said density detecting means comprises a light source and light reception elements, measures the reflected light of the pattern formed on said medium, and performs arithmetic processing for conversion according to a gradation reproduction method for said gradation control means, upon converting the measured value into the corresponding density value.
Claim 18
Dependent Claim
16 words
An image processing apparatus according to Claim 17, said gradation control means performs pulse width modulation.
Claim 19
Dependent Claim
28 words
An image processing apparatus according to Claim 18, said gradation control method is of such a nature that a screen angle is formed in the pulse width modulation.
Claim 20
Dependent Claim
20 words
An image processing apparatus according to Claim 17, further comprising memory means for storing a table for said arithmetic processing.
Claim 21
Dependent Claim
38 words
An image processing method or apparatus in which a predetermined pattern is formed on a medium and detected, and an operational parameter of an image forming operation is adjusted in response to a characteristic of the detected pattern.
References Cited (Backward Citations)
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