Halftone image recording apparatus
First Claim
1. A halftone image recording apparatus comprising:
- signal generating means for generating an m-bit density signal representing a density of an image;
level signal generating means for generating a level signal;
converting means for forming a resultant signal using said m-bit density signal and said level signal and for converting the resultant signal into an n-bit density signal, where n is less than m; and
recording means for recording an image to be reproduced in response to said n-bit density signal, said recording means including image pattern selecting means for selecting an image pattern in correspondence with said n-bit signal.
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Abstract
A halftone image recording apparatus has a photoelectric converter for generating a density signal representing the density level of an image, a periodical or random signal generator for periodically or randomly generating level signals, an adder for adding the density signal and the level signals, a memory for storing the addition signal from the adder, a pattern generator for generating an image pattern, and an ink jet head or the like to record the image pattern. Pseudooutlines are eliminated without requiring an increase in the reading resolution and without imparing the resolution during recording. Input image data is compressed and a memory of smaller capacity can be used.
48 Citations
21 Claims
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1. A halftone image recording apparatus comprising:
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signal generating means for generating an m-bit density signal representing a density of an image; level signal generating means for generating a level signal; converting means for forming a resultant signal using said m-bit density signal and said level signal and for converting the resultant signal into an n-bit density signal, where n is less than m; and recording means for recording an image to be reproduced in response to said n-bit density signal, said recording means including image pattern selecting means for selecting an image pattern in correspondence with said n-bit signal. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A halftone image recording apparatus comprising:
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image data generating means for generating m-bit data of an image; selecting means for forming resultant data using said m-bit data and for selecting the upper n significant bits of the resultant data to form an n-bit image data, where n is less than m; and pattern generating means for generating an image pattern having a plurality of dots, representing a halftone reproduction of the image, in correspondence with said n-bit image data. - View Dependent Claims (8, 9, 10, 11, 12, 13)
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14. A halftone image recording apparatus comprising:
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density signal generating means for generating an m-bit density signal representing a density level of an image; level signal generating means for generating a level signal; operation means for forming an n-bit density signal using said m-bit density signal and said level signal, where n is less than m; and dot recording signal generating means for generating a dot recording signal in response to said n-bit density signal. - View Dependent Claims (15, 16, 17, 18)
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19. A halftone image recording apparatus comprising:
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density signal generating means for generating an m-bit density signal representing a density level of an image; operation means for forming a resulatnt signal using said m-bit density signal and for selecting the upper n significant bits of said resultant signal to form an n-bit density signal, where n is less than m; and dot recording signal generating means for generating a dot recording signal in response to said n-bit density signal. - View Dependent Claims (20, 21)
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Specification