Facsimile and static presentation processing – Static presentation processing – Attribute control
Patent
1988-09-27
1990-06-26
Groody, James J.
Facsimile and static presentation processing
Static presentation processing
Attribute control
358 80, 358461, H04N 146
Patent
active
049376624
DESCRIPTION:
BRIEF SUMMARY
RELATED TECHNICAL FIELD IN THE INDUSTRY
This invention generally relates to a color image processing apparatus for processing color image signal, and specially relates to a color image processing apparatus applicable to a simple electrophotographic color copying machine in order to obtain satisfactory color image.
BACKGROUND OF THE INVENTION
The color image processing apparatus optically reads color image information on a document, identifies the information as one of predetermined multiple colors including black, red and blue, and record a color image on a record sheet on the basis of the information by using a color recording device. This type of color image processing apparatus is disclosed in Japanese Patent Publication Open to Public Inspection Nos. 147374/82 and 62769/83.
FIG. 76 shows part of a key assembly of the said color image processing apparatus.
In this figure, color image information is separated into white and cyan colors, each of which is projected onto image sensors 104 and 105 for electrophotographic conversion.
More specifically, white and cyan color signals are supplied to the subtracter 2 where red color is separated. These white, cyan and red colors are gain-controlled by the AGC circuits 3, 4 and 5, respectively, and then are coded by the binary coding circuits 6, 7 and 8, respectively. The coded output is again converted into red and black color signals by the arithmetic circuit 9, for example, and these signals are supplied to the color copying machine as image signals for color reproduction of the original.
With a color image processing apparatus capable of recording such a color image, when subjecting an image signal undergone photoelectric conversion to various processing such as resolution correction, and enlarging/reducing, it is necessary to provide processing means per color identified by color separation means or color discrimination means. More specifically, as shown in FIGS. 77 and 78, one image processing circuit is required per color signal, disadvantageously resulting in increased cost, as well as a large processing circuit.
Japanese Patent O.P.I. Publication No. 163980/1984 described a technique for representing the image signal reading using color codes.
This patent, however, merely describes a technique for converting an image signal into color codes, and discloses nothing about an effective image processing based on color codes.
Additionally, this technique incurs another problem: the image signal does not contain data indicating image density, and density processing is impossible.
There is another color image processing technique where a specific region on a document designated with a marker of a specific color is detected, and the so-detected are is subjected to a specific image processing operation.
For example, as shown in FIG. 79, once a portion of a black-and-white document is marked with a colorant of a specific color (for example, red), the image information on inside the color-marked region is recorded as converted from black into red that is a color of the marker.
Japanese Patent O.P.I. Publication Nos. 89371/1982 and 196658/1982 discloses apparatuses that are capable of detecting a marker-designated region.
These apparatuses discriminates and read a color different from that of a document, and photoelectrically convert it to generate an image signal, thereby based on the image signal, the apparatuses detect a region defined by a color marker. These apparatuses can discriminate and read a region that has a color different from that of a document, wherein the apparatuses feed an image signal based on the so-separated information, and detect a marker-designated region.
With these apparatuses, however, the so-separated information does not include color information, and the image signal photoelectrically converted from the separated information. Accordingly, there is a problem; the apparatuses can read only one specific color different from that of a document.
According to the present invention, to solve the problem, an image being read is identified to
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Abe Yoshinori
Hasebe Takashi
Katoh Hiroshi
Kimoto Tetsuo
Matsunawa Masahiko
Bierman Jordan B.
Groody James J.
Konica Corporation
Vu Kim Yen
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