Patent EP0458571A2 successfully refreshed from Google Patents.
EP0458571A2
Expired / Lapsed
EP
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Image processing method and apparatus
Assignee: Canon Inc
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Filing: 1991-05-20
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Granted: —
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Expires: 2011-05-20
Abstract
Abstract An image processing apparatus to form an outline shape of a character or a figure comprises: a memory to store a shape of pattern as outline information; a reading circuit to read out the outline information stored in the memory; a forming circuit for assigning one of a plurality of brighnesses to each pixel on the basis of the read-out outline information and for forming an image; and an output device to output the formed image to the outside. With the apparatus, a difference between the outline after the modification and the shape of the image which is formed by the outline can be reduced.
Inventors
- 👤 Isao C/O Canon Kabushiki Kaisha Migishima
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 13:15
CPC Classifications
G; G06; G06T; G06T11/00; G06T11/10
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
70 words
An image processing apparatus comprising: memory means for storing a shape of pattern as outline information; reading means for reading out the outline information stored in the memory means; forming means for assigning one of a plurality of brightnesses to each pixel on the basis of the outline information which has been read out and for forming an image; and outputting means for outputting the formed image to an outside.
Claim 2
Dependent Claim
47 words
An apparatus according to claim 1, wherein said forming means has assigning means for assigning one of the two kinds of brightnesses for pixel positions excluding pixel positions which overlap the outline and for assigning one of said brightnesses for the pixel positions which overlap the outline.
Claim 3
Dependent Claim
37 words
An apparatus according to claim 2, wherein said assigning means includes means for deciding one brightness for the pixel positions which overlap the outline in accordance with a ratio of the occupation on a pixel unit basis.
Claim 4
Dependent Claim
27 words
An apparatus according to claim 1, further comprising forming means for forming modification outline information on the basis of the outline information which has been read out.
Claim 5
Dependent Claim
61 words
An apparatus according to claim 4, wherein said forming means includes assigning means for assigning one of said plurality of brightnesses for pixel positions excluding pixel positions which overlap the outline in inner areas of the outline which is formed by the outline information and for assigning one of said plurality of brightnesses for the pixel positions which overlap the outline.
Claim 6
Dependent Claim
44 words
An apparatus according to claim 5, wherein said assigning means includes means for deciding one of said plurality of brightnesses for the pixel positions which overlap the outline in accordance with a ratio of occupation by said internal areas on a pixel unit basis.
Claim 7
Dependent Claim
33 words
An apparatus according to claim 1, wherein said forming means includes means for forming a dot pattern on the basis of the outline information which has been read out by said reading means.
Claim 8
Dependent Claim
37 words
An image processing method comprising the steps of: assigning one of a plurality of brightnesses on the basis of outline information indicative of a shape of pattern; forming a dot pattern; and outputting the formed dot pattern.
Claim 9
Dependent Claim
35 words
A method according to claim 8, wherein said brightness is determined on the basis of a ratio of occupation by internal areas on a pixel unit basis for pixel positions which overlap an outline portion.
Claim 10
Dependent Claim
24 words
A method accoring to claim 8, wherein said brightness is assigned after the dot pattern was formed on the basis of the outline information.
Claim 11
Independent Claim
56 words
A method or apparatus for processing image outline information into image pixel density information in which pixel densities are established for pixels which are partly occupied by the image as defined by the image outline information from a range of possible pixel densities including a maximum density, a minimum density and at least one intermediate density.
References Cited (Backward Citations)
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