EP0269334A2
Expired / Lapsed
EP
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Color image processing apparatus
Assignee: Canon Inc
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Filing: 1987-11-13
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Granted: —
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Expires: 2007-11-13
Abstract
Abstract A color image processing apparatus such as a color copying machine has a color appointing device for enabling an operator to appoint any desired color involved in an original image, a color range changing device for manually or automatically changing the size of range of the colors which can be regarded as being the same as the predetermined color, a target color appointing for appointing a color to which the predetermined color is to be converted, and a color image forming device such as a laser beam printer for forming a color image with the predetermined color and colors in the color range converted into the target color.
Inventors
- 👤 Yasumichi Suzuki
- 👤 Yoshinori Ikeda
- 👤 Koichi Katoh
- 👤 Tetsuya Ohnishi
- 👤 Toshihiro No 325 Kakinokidairyo Kadowaki
- 👤 Toshio Honma
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-24 21:20
CPC Classifications
G; G06; G06F; G06F3/00; G06F3/01; G06F3/03; G06F3/033; H; H04; H04N; H04N1/00; H04N1/40; H04N1/401; H04N1/46; H04N1/56; H04N1/60; H04N1/6027; H04N1/62; H04N1/622
Claims Analysis
Total Claims: 28
Claim 1
Independent Claim
86 words
A color image processing apparatus comprising: color appointing means for appointing any desired color involved in an original image; color range changing means for changing the size of range of the colors which can be regarded as being the same as said predetermined color; target color appointing means for appointing a color to which said predetermined color is to be converted; and color image forming means for forming a color image with said predetermined color and colors in said color range converted into said target color.
Claim 2
Dependent Claim
86 words
A color image processing apparatus comprising: color appointing means for appointing any desired color involved in an original image; color range changing means for changing the size of range of the colors which can be regarded as being the same as said predetermined color; target color appointing means for appointing a color to which said predetermined color is to be converted; and color image forming means for forming a color image with said predetermined color and colors in said color range converted into said target color.
Claim 3
Dependent Claim
25 words
A color image processing apparatus according to Claim 1, wherein said color range changing means enables said size of said range to be set manually.
Claim 4
Dependent Claim
31 words
A color image processing apparatus according to Claim 1, wherein said color range changing means enables said size of said range to be determined from a plurality of sample color data.
Claim 5
Dependent Claim
33 words
A color image processing apparatus according to Claim 3, further comprising position appointing means for appointing a plurality of sample points from which said plurality of sample color data are to be obtained.
Claim 6
Dependent Claim
44 words
A color image processing apparatus according to Claim 3, wherein said color range changing means enables said size of said range to be determined from the maximum and minimum values of the respective color component signals obtained from said plurality of sample color data.
Claim 7
Dependent Claim
116 words
A color image forming apparatus comprising: input means for inputting original color image data which includes at least three color component signals; region appointing means for appointing a predetermined region of said original color image data; color appointing means for appointing a predetermined color in said region appointed by said region appointing means; target color appointing means for appointing. a target color to which said predetermined color is to be converted; and color image forming means operative in accordance with the outputs of said region appointing means, said color appointing means, and said target color appointing means, so as to form a color image with said predetermined color in said region converted into said target color.
Claim 8
Dependent Claim
116 words
A color image forming apparatus comprising: input means for inputting original color image data which includes at least three color component signals; region appointing means for appointing a predetermined region of said original color image data; color appointing means for appointing a predetermined color in said region appointed by said region appointing means; target color appointing means for appointing. a target color to which said predetermined color is to be converted; and color image forming means operative in accordance with the outputs of said region appointing means, said color appointing means, and said target color appointing means, so as to form a color image with said predetermined color in said region converted into said target color.
Claim 9
Dependent Claim
28 words
A color image forming apparatus according to Claim 6, wherein said target color appointing means appoints any desired color in said original color image as said target color.
Claim 10
Dependent Claim
28 words
A color image forming apparatus according to Claim 6, wherein said target color appointing means appoints, as said target color, one of colors stored in a predetermined memory.
Claim 11
Dependent Claim
24 words
A color image forming apparatus according to Claim 8, further comprising registration means for allowing any desired color to be registered in said memory.
Claim 12
Dependent Claim
88 words
A color image processing apparatus comprising: input means for inputting an original color image data including at least three color component signals; color appointing means for appointing any desired color in said original color image data; averaging means for determining average of the color image data carried by a plurality of adjacent pixels constituting said original color image data; and executing means for executing a predetermined process upon judging that the color image data averaged by said averaging means is the same as that of said predetermined color.
Claim 13
Dependent Claim
88 words
A color image processing apparatus comprising: input means for inputting an original color image data including at least three color component signals; color appointing means for appointing any desired color in said original color image data; averaging means for determining average of the color image data carried by a plurality of adjacent pixels constituting said original color image data; and executing means for executing a predetermined process upon judging that the color image data averaged by said averaging means is the same as that of said predetermined color.
Claim 14
Dependent Claim
22 words
A color image processing apparatus according to Claim 10, wherein said predetermined process includes conversion of a color into a target color.
Claim 15
Dependent Claim
36 words
A color image processing apparatus according to Claim 10, further comprising color range changing means for changing the size of range of the colors which can be regarded as being the same as said predetermined color.
Claim 16
Dependent Claim
28 words
13 A color image processing apparatus according to Claim 12, wherein said averaging means employ smaller number of averaging pixels as said size of said range is widened.
Claim 17
Dependent Claim
94 words
A color image forming apparatus comprising: input means for inputting an original color image data including at least three color component signals; color appointing means for appointing any desired color in said original color image data; component ratio detection means for detecting color component ratios of the respective color components of said original color image data; and executing means for executing a predetermined process upon judging that the color image data averaged by said averaging means is the same as that of said predetermined color on the basis of the detected color component ratios.
Claim 18
Dependent Claim
94 words
A color image forming apparatus comprising: input means for inputting an original color image data including at least three color component signals; color appointing means for appointing any desired color in said original color image data; component ratio detection means for detecting color component ratios of the respective color components of said original color image data; and executing means for executing a predetermined process upon judging that the color image data averaged by said averaging means is the same as that of said predetermined color on the basis of the detected color component ratios.
Claim 19
Dependent Claim
22 words
A color image forming apparatus according to Claim 14, wherein said predetermined process includes conversion of a color into a target color.
Claim 20
Dependent Claim
36 words
A color image forming apparatus according to Claim 14, further comprising color range changing means for changing the size of range of the colors which can be regarded as being the same as said predetermined color.
Claim 21
Dependent Claim
27 words
A color image forming apparatus according to Claim 16, wherein said averaging means employ smaller number of averaging pixels as said size of said range is widened.
Claim 22
Dependent Claim
75 words
A color image processing apparatus comprising generating means for generating at least three color signals of different colors; gamma conversion means for effecting different gamma conversions on the respective color signals; and color image forming means for forming a color image in accordance with the output from said gamma conversion means; said gamma conversion means being adapted to repetitionally change the gamma conversion characteristics for the successive lines from which said color signals are obtained.
Claim 23
Dependent Claim
75 words
A color image processing apparatus comprising generating means for generating at least three color signals of different colors; gamma conversion means for effecting different gamma conversions on the respective color signals; and color image forming means for forming a color image in accordance with the output from said gamma conversion means; said gamma conversion means being adapted to repetitionally change the gamma conversion characteristics for the successive lines from which said color signals are obtained.
Claim 24
Dependent Claim
40 words
A color image processing apparatus according to Claim 18, wherein said color image forming means varies pulse width in accordance with the output from said gamma conversion means and forms said image with a density corresponding to said pulse width.
Claim 25
Dependent Claim
25 words
A color image forming apparatus according to Claim 19 wherein said color image forming means modulates a laser beam in accordance with said pulse width.
Claim 26
Dependent Claim
82 words
A color image forming apparatus comprising: means for providing a plurality of color component signals; extracting means for extracting black component signal from said plurality of color component signals; means for effecting undercolor removal in accordance with said black component signal; means for forming a color image in accordance with the respective color component signals after the undercolor removal and also with said black component signal; and means for varying the signal level of said black component signal in accordance with instruction.
Claim 27
Dependent Claim
82 words
A color image forming apparatus comprising: means for providing a plurality of color component signals; extracting means for extracting black component signal from said plurality of color component signals; means for effecting undercolor removal in accordance with said black component signal; means for forming a color image in accordance with the respective color component signals after the undercolor removal and also with said black component signal; and means for varying the signal level of said black component signal in accordance with instruction.
Claim 28
Dependent Claim
51 words
A color image forming apparatus according to Claim 21, further comprising means for allowing the signal level of said black component signal independently for different regions, said changing means being adapted to change the signal level of said black component signal in accordance with the appointment made by the allowing means.
References Cited (Backward Citations)
EP0004078A2
Cited
US4868674A
Cited
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