Patent US5125896A successfully refreshed from Google Patents.
EP0401023A2
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EP
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Image recording system and apparatus therefor
Assignee: Canon Inc
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Filing: 1990-05-31
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Granted: —
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Expires: 2010-05-31
Abstract
Abstract In order to record excellent gradient image by using ink of different densities, image data for dark ink and that for light ink are generated in accordance with the received image data. The generated data for dark ink is converted into a binary signal which is suitable for reproducing the resolution, while data for light ink is converted to another binary signal which is suitable for expressing gradient. In accordance with these binary signals, the discharge of each ink is controlled so as to record the image.
Inventors
- 👤 Hiroshi Tajika
- 👤 Noribumi Koitabashi
- 👤 Atsushi Arai
- 👤 Hiromitsu Hirabayashi
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-24 14:18
CPC Classifications
H; H04; H04N; H04N1/00; H04N1/40; H04N1/40087; H04N1/405
Claims Analysis
Total Claims: 31
Claim 1
Independent Claim
41 words
An image recording method for recording a gradient image by combining dots of different density, comprising the step of: recording is performed in such a manner that resolution for high density dots is raised with respect that for low density dots.
Claim 2
Dependent Claim
41 words
An image recording method for recording a gradient image by combining dots of different density, comprising the step of: recording is performed in such a manner that resolution for high density dots is raised with respect that for low density dots.
Claim 3
Dependent Claim
28 words
An image recording method according to claim 1, wherein said low density dots are recorded with said gradient raised with respect to that for said high density dots.
Claim 4
Dependent Claim
77 words
An image recording method for recording a gradient image by combining dots of different density, comprising: a process in which image data is received; a process in which data corresponding to dots of each density is generated in accordance with the value of said received image data; and a process in which data corresponding to the thus generated dots of each density is converted so as to have resolution which corresponds to said dots of each density.
Claim 5
Dependent Claim
77 words
An image recording method for recording a gradient image by combining dots of different density, comprising: a process in which image data is received; a process in which data corresponding to dots of each density is generated in accordance with the value of said received image data; and a process in which data corresponding to the thus generated dots of each density is converted so as to have resolution which corresponds to said dots of each density.
Claim 6
Dependent Claim
19 words
An image recording method according to claim 3, wherein each of said processes is provided for recording color components.
Claim 7
Dependent Claim
84 words
An image recording apparatus for recording a gradient image by combining dots of different density, comprising: receiving means for receiving image data; data generating means for generating data which corresponds to said dots of each density in accordance with the value of said image data received by said receiving means; and conversion means for converting each data which corresponds to said dot of each density generated in said data generating means so as to have resolution which corresponds to said dots of each density.
Claim 8
Dependent Claim
84 words
An image recording apparatus for recording a gradient image by combining dots of different density, comprising: receiving means for receiving image data; data generating means for generating data which corresponds to said dots of each density in accordance with the value of said image data received by said receiving means; and conversion means for converting each data which corresponds to said dot of each density generated in said data generating means so as to have resolution which corresponds to said dots of each density.
Claim 9
Dependent Claim
72 words
An image recording apparatus according to claim 5, wherein said conversion means comprises: first binary means for binarizing data of said image data generated by said data generating means which corresponds to said high density dots so as to raise its resolution; and second binary means for binarizing data of said image data generated by said data generating means which corresponds to said low density dots so as to raise its resolution.
Claim 10
Dependent Claim
35 words
An image recording apparatus according to claim 6, wherein said first binary means is binary means employing a bayer dither matrix, while said second binary means is binary means employing a half tone dither matrix.
Claim 11
Dependent Claim
36 words
An image recording apparatus according to claim 6, wherein said first binary means is binary means based on an error diffusion method, while said second binary means is binary means basing upon a density pattern method.
Claim 12
Dependent Claim
31 words
An image recording apparatus according to claim 6, wherein said receiving means, said data generating means and said conversion means are respectively provided for components of color image to be recorded.
Claim 13
Dependent Claim
124 words
An image recording apparatus for recording a gradient image by combining dots of different density, comprising: receiving means for receiving image data; data generating means for generating data which corresponds to said dots of each density in accordance with the value of said image data received; compensating means for compensating data which corresponds to said dots of each density generated in said data generating means in a proportion which bases upon the resolution of each of said densities; recording means for recording the image in accordance with said resolution for each of said densities; and control means for controlling in such a manner that data which corresponds to said dots of each density compensated by said compensating means is recorded by said recording means.
Claim 14
Dependent Claim
124 words
An image recording apparatus for recording a gradient image by combining dots of different density, comprising: receiving means for receiving image data; data generating means for generating data which corresponds to said dots of each density in accordance with the value of said image data received; compensating means for compensating data which corresponds to said dots of each density generated in said data generating means in a proportion which bases upon the resolution of each of said densities; recording means for recording the image in accordance with said resolution for each of said densities; and control means for controlling in such a manner that data which corresponds to said dots of each density compensated by said compensating means is recorded by said recording means.
Claim 15
Dependent Claim
31 words
An image recording apparatus according to claim 10, wherein said compensating means compensates data for said dots of each density generated in said data generating means in accordance with each resolution.
Claim 16
Dependent Claim
29 words
An image recording apparatus according to claim 10, wherein said recording means records said high density dots with large resolution and records said low density dots with small resolution.
Claim 17
Dependent Claim
49 words
An image recording apparatus according to claim 10, wherein said recording means comprises recording heads by the number corresponding to the number of types of ink having different densities and each of said recording heads has nozzles for discharging ink and disposed at intervals which correspond to their resolution.
Claim 18
Dependent Claim
159 words
An image recording apparatus for recording a gradient image by combining dots of at least two different densities, comprising: receiving means for receiving image data; first data generating means for generating image data for dark ink in accordance with the value of said image data received by said receiving means; second data generating means for generating image data for light ink in accordance with the value of said image data received by said receiving means; first conversion means for converting said image data for dark ink generated by said first data generating means into a binary signal with the resolution made critical; second conversion means for converting said image data for light ink generated by said second data generating means into a binary signal with the gradient made critical; and recording means for controlling the discharge of ink of each density in accordance with said binary signal converted by said first and second conversion means and recording the image.
Claim 19
Dependent Claim
159 words
An image recording apparatus for recording a gradient image by combining dots of at least two different densities, comprising: receiving means for receiving image data; first data generating means for generating image data for dark ink in accordance with the value of said image data received by said receiving means; second data generating means for generating image data for light ink in accordance with the value of said image data received by said receiving means; first conversion means for converting said image data for dark ink generated by said first data generating means into a binary signal with the resolution made critical; second conversion means for converting said image data for light ink generated by said second data generating means into a binary signal with the gradient made critical; and recording means for controlling the discharge of ink of each density in accordance with said binary signal converted by said first and second conversion means and recording the image.
Claim 20
Dependent Claim
58 words
An image recording apparatus according to claim 14, wherein image data for dark ink generated by said first data generating means is generated when the density of said received image data by said receiving means exceeds a predetermined density value, said image data for dark ink being generated in proportion to the density of said received image data.
Claim 21
Dependent Claim
74 words
An image recording apparatus according to claim 14, wherein image data for light ink is generated by said second data generating means in proportional to the density of said received image data when the density of said received image data is lower than a predetermined density level, while the same is generated in proportional to the density of said received image data when said density of said received image data exceeds a predetermined level.
Claim 22
Dependent Claim
35 words
An image recording apparatus according to claim 14, wherein said first conversion means is binary means employing a bayer dither matrix, while said second conversion means is binary means employing a half tone dither matrix.
Claim 23
Dependent Claim
36 words
An image recording apparatus according to claim 14, wherein said first binary means is binary means basing upon an error diffusion method, while said second binary means is binary means based on a density pattern method.
Claim 24
Dependent Claim
31 words
An image recording apparatus according to claim 14, wherein said receiving means, said data generating means and said conversion means are respectively provided for components of color image to be recorded.
Claim 25
Dependent Claim
155 words
An image recording apparatus for recording a gradient image by combining dots of a plurality of different densities, comprising: receiving means for receiving image data; data generating means for generating image data which corresponds to ink of each density in accordance with the value of said image data received; compensating means for compensating image data generated by said data generating means in such a manner that image data for high density ink is subjected to higher compensation rate; conversion means for converting image data for each ink of each density compensated by said compensating means into a binary signal; recording means for recording ink in such a manner that the higher the density of said ink is, the larger said resolution becomes; and control means for controlling in such a manner that said recording means performs the recording in accordance with said binary signal for each ink of each density converted by said conversion means.
Claim 26
Dependent Claim
155 words
An image recording apparatus for recording a gradient image by combining dots of a plurality of different densities, comprising: receiving means for receiving image data; data generating means for generating image data which corresponds to ink of each density in accordance with the value of said image data received; compensating means for compensating image data generated by said data generating means in such a manner that image data for high density ink is subjected to higher compensation rate; conversion means for converting image data for each ink of each density compensated by said compensating means into a binary signal; recording means for recording ink in such a manner that the higher the density of said ink is, the larger said resolution becomes; and control means for controlling in such a manner that said recording means performs the recording in accordance with said binary signal for each ink of each density converted by said conversion means.
Claim 27
Dependent Claim
29 words
An image recording apparatus according to claim 20, wherein said recording means records said high density dots with large resolution and records said low density dots with small resolution.
Claim 28
Dependent Claim
49 words
An image recording apparatus according to claim 20, wherein said recording means comprises recording heads by the number corresponding to the number of types of ink having different densities and each of said recording heads has nozzles for discharging ink and disposed at intervals which correspond to their resolution.
Claim 29
Dependent Claim
34 words
An image recording apparatus according to claim 20 further comprising said receiving means, said data generating means, said conversion means and said control means respectively provided for components of color image to be recorded.
Claim 30
Dependent Claim
47 words
An image recording apparatus or method in which an image is recorded by forming dots of a first optical density, and forming dots of a second optical density, the dots of the first optical density having a finer resolution than the dots of the second optical density.
Claim 31
Dependent Claim
47 words
An image recording apparatus or method in which an image is recorded by forming dots of a first optical density, and forming dots of a second optical density, the dots of the first optical density having a finer resolution than the dots of the second optical density.
References Cited (Backward Citations)
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