EP0610928A2
Expired / Lapsed
EP
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Image data enlarging/smoothing processor
Assignee: Fujifilm Business Innovation Corp
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Filing: 1994-02-10
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Granted: —
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Expires: 2014-02-10
Abstract
Abstract Input image data is stored in a register matrix of 7 × 7 in a successive manner. A pattern detecting section detects a black- or white-pixel connective pattern of the reference pixels of a marked pixel. When the reference pixel pattern is a black-pixel connective pattern of 1 : n (n = 1, 2, 3, ...), an enlarging/smoothing processor section interpolates a part of the enlarged marked pixel with black pixels. When it is a white-pixel connective pattern of 1 : n (n = 1, 2, 3, ...), the enlarging/smoothing processor erases a part of the enlarged marked pixel. As a result, the oblique line can be smoothed. The line that is made thick by the smoothing process can be shaped into a thin line. Thus, a high-quality image can be produced.
Inventors
- 👤 Kenichi Sonobe
- 👤 Toshifumi Nakamura
- 👤 Takashi Okabe
- 👤 Takenori Obara
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 12:45
CPC Classifications
G; G06; G06T; G06T3/00; G06T3/40; G06T3/4007
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
101 words
An image data enlarging/smoothing processor for carrying out an interpolation process of pixels simultaneously with a pixel density conversion of binary image data, comprising: connective pattern detecting means for detecting a form of a connective pattern of reference pixels adjoining to a marked pixel; and enlarging/smoothing processing means operating such that said processing means enlarges the marked pixel on the basis of enlargement ratios in fast and slow scan directions, whereby enlarging and smoothing the marked pixel on the basis of the form of the connective pattern of the reference pixels and processing positions in the fast and slow scan directions.
Claim 2
Dependent Claim
82 words
The image data enlarging/smoothing processor according to claim 1, wherein said connective pattern detecting means detects forms of four directions of a black-pixel connective pattern of 1 : 1 and forms of eight directions of black-pixel connective patterns of 1 : 2 to 1 : n (n is a positive integer), and wherein said enlarging/smoothing processing means enlarges the marked pixel in accordance with an enlargement ratio, and interpolates the enlarged pixel in accordance with the detected form of the connective pattern.
Claim 3
Dependent Claim
71 words
The image data enlarging/smoothing processor according to claim 1, wherein said connective pattern detecting means detects forms of four directions of a white-pixel connective pattern of 1 : 1 and forms of eight directions of white-pixel connective patterns of 1 : 2 to 1 : n (n is a positive integer), and wherein said enlarging/smoothing processing means erases the marked pixel in accordance with the detected form of the connective pattern.
Claim 4
Dependent Claim
55 words
The image data enlarging/smoothing processor according to claim 2, wherein said connective pattern detecting means determines whether or not the connective pattern of the reference pixels impairs the image quality, and if it is determined that the connective pattern impairs the image quality, said connective pattern detecting means does not carry out the interpolation process.
Claim 5
Dependent Claim
55 words
The image data enlarging/smoothing processor according to claim 3, wherein said connective pattern detecting means determines whether or not the connective pattern of the reference pixels impairs the image quality, and if it is determined that the connective pattern impairs the image quality, said connective pattern detecting means does not carry out the erasure process.
Claim 6
Dependent Claim
52 words
The image data enlarging/smoothing processor according to claim 2, wherein said connective pattern detecting means determines whether or not the connective pattern of the reference pixels is an orthogonal pattern, and if it is determined that the connective pattern is the orthogonal pattern, said connective pattern detecting means weakens the interpolation process.
Claim 7
Dependent Claim
52 words
The image data enlarging/smoothing processor according to claim 3, wherein said connective pattern detecting means determines whether or not the connective pattern of the reference pixels is an orthogonal pattern, and if it is determined that the connective pattern is the orthogonal pattern, said connective pattern detecting means weakens the interpolation process.
Claim 8
Dependent Claim
130 words
An image data enlarging/smoothing processor comprising: enlargement ratio determining means for determining enlargement ratios in fast and slow scan directions, which lead to a resolution of an output image, in accordance with a resolution of input image data; enlargement processing means for developing a pixel area occupied by a marked pixel after said marked pixel is enlarged in accordance with the enlargement ratios determined by said enlargement ratio determining means, said pixel area consisting of a plurality of pixels; detecting means for detecting a connective pattern of reference pixels adjoining to the marked pixel in the input image data; and black/white determining means for determining whether or not the respective pixels of said pixel area are black or white in accordance with the connective pattern detected by said detecting means.
Claim 9
Dependent Claim
58 words
The image data enlarging/smoothing processor according to claim 8, wherein when the connective pattern detected by said detecting means is an orthogonal pattern consisting of black pixels, said black/white determining means reduces the number of interpolated pixels in said pixel area to be smaller than that when said connective pattern is a nonorthogonal pattern consisting of black pixels.
Claim 10
Dependent Claim
83 words
The image data enlarging/smoothing processor according to claim 9, wherein when the connective pattern of the reference pixels in the fast and slow scan directions, which is detected by said detecting means, is an orthogonal pattern consisting of black pixels, said black/white determining means renders black only one pixel located at a corner where a train of the reference pixels extending in the fast scan direction intersects another train of the reference pixels extending in the slow scan direction within said pixel area.
Claim 11
Dependent Claim
28 words
The image data enlarging/smoothing processor according to claim 8, wherein the number of pixels in said pixel area is determined depending on the resolution of the output image.
References Cited (Backward Citations)
No citation records indexed.
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