EP0220903A2
Expired / Lapsed
EP
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Image-processing apparatus
Assignee: Konica Minolta Inc
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Filing: 1986-10-20
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Granted: —
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Expires: 2006-10-20
Abstract
Abstract The present invention relates a color image processing apparatus in which color information read from a document is separated into colors of more than two kinds, the separated color information are photoelectricaliy converted to electric signals, the photoelectrically converted signals are operated by predetermined arithmetic processing steps, color gamuts of the color information are detected based on the operated signals, image data per each color gamut are outputted, and a plurlity of threshold values per each color gamut are set during multiple-coding of the above image data.
Inventors
- 👤 Hiroshi Niki
- 👤 Masahiko Matsunawa
- 👤 Hiroyuki Yamamoto
- 👤 Yoshinori Abe
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-26 17:54
CPC Classifications
H; H04; H04N; H04N1/00; H04N1/46; H04N1/54
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
138 words
A color image processing apparatus comprising ; optical means for obtaining a plurality of optical color information from a original color image, photo-electric conversion means for converting said optical color information into electric signals respectively, color extraction means for extracting color information signals based on said electric signals, selecting means for generating selection signals to select said extracted color information signals, control means for outputting said selected color information signals based on said extracted color information signals and said selection signals, and multiple coding means for coding said outputted color information signals into multiple coded signals comparing with a threshold value, wherein said control means capable of outputting a luminance signals being comprised in said color information signals to said multiple coding means in resposive to a monochrome mode order which express said color image in monochrome image.
Claim 2
Dependent Claim
138 words
A color image processing apparatus comprising ; optical means for obtaining a plurality of optical color information from a original color image, photo-electric conversion means for converting said optical color information into electric signals respectively, color extraction means for extracting color information signals based on said electric signals, selecting means for generating selection signals to select said extracted color information signals, control means for outputting said selected color information signals based on said extracted color information signals and said selection signals, and multiple coding means for coding said outputted color information signals into multiple coded signals comparing with a threshold value, wherein said control means capable of outputting a luminance signals being comprised in said color information signals to said multiple coding means in resposive to a monochrome mode order which express said color image in monochrome image.
Claim 3
Dependent Claim
24 words
The color image processing apparatus of claim 1, wherein said extracting means comprises color information storage means for storing a predetermined color extraction data.
Claim 4
Dependent Claim
41 words
The color image processing apparatus of claim 1, wherein said extracting means comprises color extraction information generation means for generating color extraction information signals based on said electric signals and color information storage means for storing a predetermined color extraction data.
Claim 5
Dependent Claim
118 words
A color image processing apparatus comprising ; optical means for obtaining a plurality of optical color information from a original color image, photo-electric conversion means for converting said optical signals into electric signals respectively, color extraction means for extracting color information signals based on said electric signals, selecting means for generating selection signals to select said extracted color information signals, control means for outputting said selected color information signals based on said extracted color information signals and said selection signals, and multiple coding means for coding said outputted color information signals into multiple coded signals comparing a threshold value, wherein said threshold values are provided for respective color gamut. 5. The color image processing apparatus of claim 4,
Claim 6
Dependent Claim
23 words
wherein said multiple coding means comprises a threshold value storage means for storing plural sets of said threshold values for respective color gamut.
Claim 7
Dependent Claim
23 words
wherein said multiple coding means comprises a threshold value storage means for storing plural sets of said threshold values for respective color gamut.
Claim 8
Dependent Claim
20 words
The image processing apparatus of claim 5, wherein said threshold value storage means can be addressed by said selection signals.
Claim 9
Dependent Claim
99 words
A color image processing apparatus comprising ; optical means for obtaining a plurality of optical color information from a original color image, photo-electric conversion means for converting said optical signals into electric signals respectively, color extraction means for extracting color information signals based on said electric signals, selecting means for generating selection signals to select said extracted color information signals, control means for outputting said selected color information signals based on said extracted color information signals and said selection signals, and multiple coding means for coding said outputted color information signals into multiple coded signals comparing a threshold value.
Claim 10
Dependent Claim
99 words
A color image processing apparatus comprising ; optical means for obtaining a plurality of optical color information from a original color image, photo-electric conversion means for converting said optical signals into electric signals respectively, color extraction means for extracting color information signals based on said electric signals, selecting means for generating selection signals to select said extracted color information signals, control means for outputting said selected color information signals based on said extracted color information signals and said selection signals, and multiple coding means for coding said outputted color information signals into multiple coded signals comparing a threshold value.
Claim 11
Dependent Claim
119 words
An color image processing apparatus comprising ; optical means for scanning a document having color image information and obtaining a plurality of optical signals therefrom, color extraction means for extracting color information signals based on said electric signals, selecting means for generating selection signals to select said extracted color information signals, control means for outputting said selected color information signals based on said extracted color information signals and said selection signals, and multiple coding means for coding said outputted color information signals into multiple coded signals comparing a threshold value, wherein said apparatus further comprises a means for obtaining a color gamut information existing on said original image and a density information of said color gamut during first scanning.
Claim 12
Dependent Claim
119 words
An color image processing apparatus comprising ; optical means for scanning a document having color image information and obtaining a plurality of optical signals therefrom, color extraction means for extracting color information signals based on said electric signals, selecting means for generating selection signals to select said extracted color information signals, control means for outputting said selected color information signals based on said extracted color information signals and said selection signals, and multiple coding means for coding said outputted color information signals into multiple coded signals comparing a threshold value, wherein said apparatus further comprises a means for obtaining a color gamut information existing on said original image and a density information of said color gamut during first scanning.
Claim 13
Dependent Claim
30 words
The apparatus of claim 8, wherein said apparatus comprises a means for judging a number of scanning said document based on both said color gamut information and said density information.
Claim 14
Dependent Claim
13 words
The apparatus of claim 8, wherein said first scanning is a preliminary scanning.
Claim 15
Dependent Claim
16 words
The apparatus of claim 8, wherein said first scanning is a scanning for an first color.
Claim 16
Dependent Claim
31 words
The apparatus of claim 8, wherein said apparatus comprises a means for judging a threshold value for multiple coding based on both said color gamut information and said color density information.
Claim 17
Independent Claim
121 words
A method of processing a color image, which comprises the steps of; (1) scanning and providing a plurality of optical color information from an original color image, (2) photoelectrically converting the optical color information into electric signals, (3) processing the electric signals in accordance with predetermined way to generate a color extraction signal, (4) addressing a color information storing means by the color extraction signal, the color information storing means storing a density corresponding data corresponding to a predetermined color gamut on a color map, (5) selecting the addressed density corresponding data in accordance with a color selection signals which designates a color gamut to be coded, and (6) coding the selected density corresponding data by comparing with a threshold value.
Claim 18
Independent Claim
121 words
A method of processing a color image, which comprises the steps of; (1) scanning and providing a plurality of optical color information from an original color image, (2) photoelectrically converting the optical color information into electric signals, (3) processing the electric signals in accordance with predetermined way to generate a color extraction signal, (4) addressing a color information storing means by the color extraction signal, the color information storing means storing a density corresponding data corresponding to a predetermined color gamut on a color map, (5) selecting the addressed density corresponding data in accordance with a color selection signals which designates a color gamut to be coded, and (6) coding the selected density corresponding data by comparing with a threshold value.
Claim 19
Dependent Claim
21 words
The method of claim 13, wherein said method comprises a step of discriminating a color gamut existing on said original image.
Claim 20
Dependent Claim
26 words
The method of claim 14, wherein said method comprises a step of creating a thershold value corresponding to a density information of the existing color gamut.
Claim 21
Dependent Claim
72 words
The method of claim 13, wherein said method carry out a step of preliminally scanning for discriminating a color gamut exsisting on the original image and for creating threshold values for each of the existing color gamut, thereby controlling said color selection signals to repeat the step from (1) to (6) the number of the existing color gamut and to code the selected density corresponding data by using said created threshold values.
Claim 22
Dependent Claim
17 words
The method of claim 16, wherein the existing color gamut is discriminated by using a density histgram.
Claim 23
Dependent Claim
70 words
The method of claim 13, wherein the method firstly carry out the step from (1) to (6) for specific color gamut and discriminates a color gamut existing on said original image by counting number of picture elements belonging in each color gamut and comparing the counted values with predetermined values, thereby controlling said color selection signals to repeat the step from (1) to (6) for the existing other color gamut.
Claim 24
Dependent Claim
51 words
The method of claim 13, wherein, in the processing step, said color extraction signals comprising a color difference signal and a luminance signal, and wherein, in a monochromatic mode which expresses all color image by one specific color, said method codes the luminance sinals in place of the density corresponding data.
Claim 25
Dependent Claim
30 words
The method of claim 13, wherein, in a monochromatic mode which expresses all color image by one specific color, said method codes a logiclal products of the density corresponding data.
References Cited (Backward Citations)
JPS5062320A
Cited
JPS5844825A
Cited
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