Patent EP0428356B1 successfully refreshed from Google Patents.
EP0428356B1
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Pattern generation method and pattern generation apparatus
Assignee: Canon Inc
•
Filing: 1990-11-12
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Granted: 2004-05-19
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Expires: 2010-11-12
Abstract
No abstract record available.
Inventors
- 👤 Tsuneaki Kurumida
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 12:29
CPC Classifications
H; H04; H04N; H04N1/00; H04N1/40; H04N1/40068; G; G06; G06K; G06K15/00; G06K15/02; G06K15/12; G06K15/1204; G06K15/1223; G06K15/128; G09; G09G; G09G5/00; G09G5/22; G09G5/24; G09G5/28; H04N1/40075; G06K2215/00; G06K2215/0002; G06K2215/004; G06K2215/0042; G06K2215/0045; G06K2215/006
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
193 words
A pattern generating apparatus comprising: converting means (2) for converting vector data
representing an image into a binary bit map of the image; means (4) for storing the binary bit image; and output means (8) having G grey scale levels and
adapted to output the binary bit map data as grey scale
data; and characterised in that the converting means
generate the binary bit map with a resolution of m x n
which is greater than the output resolution of the output
means, where m and n are integers by means of which the
output resolution of the output means in the respective
x and y axes have been multiplied to generate the
resolution of the binary bit map, where (m x n) + 1 ≥ G;
and in that there is additionally provided dividing means
(6) for dividing the binary bit map into areas
corresponding to the output resolution of the output
means; and density detector means (7) for detecting the
densities in each of the areas generated by the dividing
means to generate grey scale data in accordance with the
detected densities but at the output resolution of the
output means.
Claim 2
Dependent Claim
52 words
Apparatus as claimed in claim 1, and including means
(778) adapted to convert said binary bit map into an
analog image signal, and means (778) adapted to compare
the analog image signal with a triangular wave having a
predetermined period to modulate the analog image signal
and generate a pulse-width modulated signal.
Claim 3
Dependent Claim
25 words
Apparatus as claimed in claim 2, and including
output means (711) adapted to generate a gradation image
in response to the modulated analog image signal.
Claim 4
Dependent Claim
20 words
Apparatus as claimed in claim 2 or 3, wherein the
output means are adapted to generate a colored gradation
image.
Claim 5
Dependent Claim
19 words
Apparatus as claimed in either claim 3 or claim 4,
wherein the output means is a laser output device.
Claim 6
Dependent Claim
18 words
Apparatus according to any preceding claim, wherein
said output means (8) comprises a display device or a
printer.
Claim 7
Dependent Claim
18 words
Apparatus according to claim 6, wherein said printer
comprises a laser beam printer or an ink jet printer.
Claim 8
Independent Claim
196 words
A method of generating a pattern comprising: a step of converting (2) vector data representing
an image into a binary bit map of the image; a step of storing (4) the binary bit image; and
utilising output means (8) having G grey scale levels to
output the binary bit map data as grey scale data; and characterised in that the converting step generates the
binary bit map with a resolution of m x n which is
greater than the output resolution of the output means,
where m and n are integers by means of which the output
resolution of the output means in the respective x and y
axes have been multiplied to generate the resolution of
the binary bit map, where (m x n) + 1 ≥ G; and in that there is additionally provided a step of dividing (6) the
binary bit map into areas corresponding to the output
resolution of the output means; and a step of.detecting
the densities in each of the areas generated by the step
of dividing the binary map to generate grey scale data in
accordance with the detected densities but at the output
resolution of the output means.
Claim 9
Dependent Claim
50 words
A method according to claim 8, and including
converting (778) said binary bit map into an analog image
signal, and comparing the analog image signal with a
triangular wave having a predetermined period to modulate
the analog image signal to provide a pulse-width
modulated signal for controlling the output means.
Claim 10
Dependent Claim
15 words
A method according to claim 9, wherein the output
means provide a coloured gradation image.
Claim 11
Dependent Claim
17 words
A method according to claim 10, wherein the output
means is a display device or a printer.
Claim 12
Dependent Claim
19 words
A method according to claim 11, wherein the printer
comprises a laser beam printer or an ink jet printer.
References Cited (Backward Citations)
No citation records indexed.
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