EP0422544A2
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EP
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Color image data processing apparatus
Assignee: Fujitsu Ltd
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Filing: 1990-10-08
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Granted: —
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Expires: 2010-10-08
Abstract
Abstract A color image data processing apparatus (1) processes hue information of picture elements read out sequentially. The apparatus comprises a chromatic color detection unit (4) for detecting a chromatic color picture element series that is a consecutive succession of chromatic color picture elements in a main scanning line, a replacing unit (5) for replacing the hue value of each picture element of the chromatic color picture element series with the hue value of a picture element located approximately at the center position of the detected chromatic color picture element series. The apparatus may further include an averaged hue value switching unit for switching the replaced hue value of each of the picture elements with the average of the replaced hue values of each picture element and picture elements located in a nearby region of said each picture elements.
Inventors
- 👤 Yasuhiko Nakano
- 👤 Shigeru Yoshida
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 18:23
CPC Classifications
G; G06; G06T; G06T11/00; G06T11/10; H; H04; H04N; H04N1/00; H04N1/46; H04N1/56; H04N1/60; H04N1/62
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
89 words
A color image data processing apparatus for processing hue information of picture elements read out sequentially, said apparatus comprising: a chromatic color detection means for detecting a chromatic color picture element series that is a consecutive succession of chromatic color picture elements in a main scanning line; and a replacing means for replacing the hue value of each picture element of the chromatic color picture element series with the hue value of a picture element located approximately at the center position of the detected chromatic color picture element series.
Claim 2
Dependent Claim
89 words
A color image data processing apparatus for processing hue information of picture elements read out sequentially, said apparatus comprising: a chromatic color detection means for detecting a chromatic color picture element series that is a consecutive succession of chromatic color picture elements in a main scanning line; and a replacing means for replacing the hue value of each picture element of the chromatic color picture element series with the hue value of a picture element located approximately at the center position of the detected chromatic color picture element series.
Claim 3
Dependent Claim
55 words
The color image data processing apparatus according to claim 1 further comprising: an averaged hue value switching means for switching the replaced hue value of each of the picture elements with the average of the replaced hue values of each picture element and picture elements located in a nearby region of said each picture elements.
Claim 4
Dependent Claim
123 words
The color image data processing apparatus according to claim 2 wherein said chromatic color detecting means comprises: a first detecting means for detecting a change in a picture element whose data have been inputted sequentially according to the main scanning line, from an achromatic color to a chromatic color; a second detecting means for detecting a change in a picture element whose data are inputted sequentially according to the main scanning line, from a chromatic color to an achromatic color; and a counter means for starting a count of a clock means for indicating the inputted picture element according to the detecting result of said first detecting means and for stopping the count according to the detecting result of said second detecting means.
Claim 5
Dependent Claim
99 words
The color image data processing apparatus according to claim 3, wherein said replacing means comprises: a hue value setting means for setting the hue value of a picture element positioned at a location of a half of the value counted by said counter from the picture element on the main scanning line from which said counter started the counting as the hue value of said chromatic color picture element series; and a hue value replacing means for replacing the hue value of said chromatic color picture element series with the hue value set by said hue value setting means.
Claim 6
Dependent Claim
58 words
The color image data processing apparatus according to claim 2, wherein said averaged hue value switching means comprises: a line memory means for memorizing the data for n main scanning lines, an average computing means for computing the average of the hue value of the n x m picture elements in said line memory as one window worth.
Claim 7
Dependent Claim
19 words
The color image data processing apparatus according to claim 5, wherein said n x m is 5 x 15.
Claim 8
Dependent Claim
51 words
A color image data processing apparatus comprising: in a color identification device comprising an HSV conversion means for outputting an original image signal in signals of hue, saturation and value, and a hue averaging means for averaging the hue within a window compartment comprising multiple picture elements of an original image.
Claim 9
Dependent Claim
51 words
A color image data processing apparatus comprising: in a color identification device comprising an HSV conversion means for outputting an original image signal in signals of hue, saturation and value, and a hue averaging means for averaging the hue within a window compartment comprising multiple picture elements of an original image.
Claim 10
Dependent Claim
89 words
A color image data processing apparatus comprising: an HSV conversion means for converting an original image signal into signals of hue, saturation and value in a picture element unit; a hue averaging means for calculating the average of the hue values of the picture elements whose saturation is over a certain threshold, in a unit of one of multiply divided regions; and a conversion means for converting the hue of the picture elements whose saturation is over said certain threshold into the hue calculated by said hue averaging means.
Claim 11
Dependent Claim
89 words
A color image data processing apparatus comprising: an HSV conversion means for converting an original image signal into signals of hue, saturation and value in a picture element unit; a hue averaging means for calculating the average of the hue values of the picture elements whose saturation is over a certain threshold, in a unit of one of multiply divided regions; and a conversion means for converting the hue of the picture elements whose saturation is over said certain threshold into the hue calculated by said hue averaging means.
Claim 12
Dependent Claim
126 words
The color image data processing apparatus according to claim 8, wherein said hue averaging means comprises: a comparison means for comparing the saturation inputted from said HSV conversion means with a certain inputted value; a gate circuit means for outputting 0 and the hue value outputted from said HSV conversion means, respectively when said comparing means judges that the inputted saturation value is smaller or larger than the certain value; an accumulator means for accumulating the value outputted from said gate circuit means; a counter means for counting the number of picture elements whose saturation values are greater than said certain value of said comparison means; and an operation means for dividing the result of said accumulator means by the count value of said counter means.
Claim 13
Dependent Claim
120 words
The color image data processing apparatus according to claim 9, wherein said accumulator means comprises: an adder means for adding an output from said gate circuit means inputted to one of its input terminals to the value inputted to its other input terminal; a line memory means, having a memory capacity for one scanning of picture elements comprising an image, for memorizing the output from said adder means corresponding to the location of the picture element in one scanning; and a register means for reading and memorizing the value of the picture element corresponding to the output from the gate circuit means inputted to said adder means and adding the value to the other input terminal of said adder means.
References Cited (Backward Citations)
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