US5075780A
Expired / Lapsed
US
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Method of reproducing gradations according to a ratio of fine pixels turned on to fine pixels turned off
Assignee: Kyocera Mita Industrial Co Ltd
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Filing: 1990-03-22
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Granted: 1991-12-24
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Expires: 2010-03-22
Abstract
Abstract Disclosed is a method of reproducing gradations wherein a reference matrix pattern is configured by arranging a plurality of unit pixels like a matrix, each unit pixel is formed with a predetermined plurality of fine pixels, the fine pixels in number according to the gradations of an image signal are turned on, and the gradations are reproduced in accordance with the ratio of the fine pixels turned on to the fine pixels turned off in the reference matrix pattern, comprising steps of choosing the fine pixel to become a kernel, sequentially and alternatively growing the fine pixels adjacent to both sides of the fine pixel of the kernel therearound, and assigning serial ranks according to density of the image signal until all the fine pixels in the unit pixel are turned on at the region in which the image signal has the high density.
Inventors
- 👤 Kenji Shibahara
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 13:51
CPC Classifications
H; H04; H04N; H04N1/00; H04N1/40; H04N1/405; H04N1/4055; H04N1/4058; H04N1/4056
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
198 words
A method of reproducing gradations according to an image signal wherein a reference matrix pattern is configured by arranging a plurality of unit pixels, each unit pixel being formed with a predetermined plurality of fine pixels, a number of the fine pixels being turned on according to the image signal so that the gradations are reproduced in accordance with a ratio of fine pixels turned on to fine pixels turned off in the reference matrix pattern, said method comprising the steps of: (a) alternately selecting every other unit pixel; (b) choosing, as kernels, the fine pixels at an end of each unit pixel thus selected in step (a), respectively; (c) turning on each kernel fine pixel in predetermined ranks according to a density indicated by the image signal; and (d) when all the kernel fine pixels are turned on in step (c), alternately turning on the fine pixels in the unit pixels selected in step (a) adjacent to the fine pixels already turned on, and turning on fine pixels in unit pixels not selected in step (a) adjacent to the fine pixels already turned on, in a predetermined rank according to the density indicated by the image signal.
Claim 2
Independent Claim
198 words
A method of reproducing gradations according to an image signal wherein a reference matrix pattern is configured by arranging a plurality of unit pixels, each unit pixel being formed with a predetermined plurality of fine pixels, a number of the fine pixels being turned on according to the image signal so that the gradations are reproduced in accordance with a ratio of fine pixels turned on to fine pixels turned off in the reference matrix pattern, said method comprising the steps of: (a) alternately selecting every other unit pixel; (b) choosing, as kernels, the fine pixels at an end of each unit pixel thus selected in step (a), respectively; (c) turning on each kernel fine pixel in predetermined ranks according to a density indicated by the image signal; and (d) when all the kernel fine pixels are turned on in step (c), alternately turning on the fine pixels in the unit pixels selected in step (a) adjacent to the fine pixels already turned on, and turning on fine pixels in unit pixels not selected in step (a) adjacent to the fine pixels already turned on, in a predetermined rank according to the density indicated by the image signal.
Claim 3
Dependent Claim
22 words
A method according to claim 1, wherein the unit pixels selected from the reference matrix pattern have the fine pixels arranged therein.
Claim 4
Dependent Claim
25 words
A method according to claim 1, wherein the predetermined ranks to turn on the kernel fine pixels are distributionally assigned in the reference matrix pattern.
Claim 5
Dependent Claim
46 words
A method according to claim 1, wherein the predetermined ranks to alternately turn on the fine pixels adjacent to both sides of the fine pixels, which are turned on, according to the density indicated by the image signals are distributionally assigned in the reference matrix pattern.
Claim 6
Dependent Claim
232 words
In a method of reproducing gradations according to an image signal wherein a reference matrix pattern is configured by arranging a plurality of unit pixels, each unit pixel being formed with a predetermined plurality of fine pixels, a number of the fine pixels being turned on according to the image signal so that the gradations are reproduced in accordance with a ratio of fine pixels turned on to fine pixels turned off in the reference matrix pattern, said method including the steps of: (a) selecting a plurality of fine pixels which are arranged in the reference matrix pattern; (b) distributionally assigning ranks to turn on the fine pixels selected in step (a) within the reference matrix pattern at a region in which the image signal indicates as having low a density; (c) dividing fine pixels not selected in step (a) into groups, each of the groups consisting of adjacent fine pixels; (d) assigning ranks to turn on the groups selected in step (c) within the reference matrix pattern at a region which the image signal indicates has a high density, the improvement comprising a step of: (e) turning on one of the groups defined in step (d) by serially, in succession, turning on adjacent fine pixels in said one group in accordance with the density indicated by the image signal until all the fine pixels in said one group are turned on.
Claim 7
Dependent Claim
232 words
In a method of reproducing gradations according to an image signal wherein a reference matrix pattern is configured by arranging a plurality of unit pixels, each unit pixel being formed with a predetermined plurality of fine pixels, a number of the fine pixels being turned on according to the image signal so that the gradations are reproduced in accordance with a ratio of fine pixels turned on to fine pixels turned off in the reference matrix pattern, said method including the steps of: (a) selecting a plurality of fine pixels which are arranged in the reference matrix pattern; (b) distributionally assigning ranks to turn on the fine pixels selected in step (a) within the reference matrix pattern at a region in which the image signal indicates as having low a density; (c) dividing fine pixels not selected in step (a) into groups, each of the groups consisting of adjacent fine pixels; (d) assigning ranks to turn on the groups selected in step (c) within the reference matrix pattern at a region which the image signal indicates has a high density, the improvement comprising a step of: (e) turning on one of the groups defined in step (d) by serially, in succession, turning on adjacent fine pixels in said one group in accordance with the density indicated by the image signal until all the fine pixels in said one group are turned on.
Claim 8
Dependent Claim
28 words
A method according to claim 5, comprising a step of repeating step (e) for another group of adjacent fine pixels in accordance with ranks assigned in step (d).
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-12-23 | 1995-06-24 | 1995-12-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-12-23 | 1999-06-24 | 1999-12-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-12-23 | 2003-06-24 | 2003-12-24 | $7700.00 | Window Closed / Lapsed |