JPS63286069A - Color picture processing unit - Google Patents

Abstract

PURPOSE:To attain area designation surely by applying color separation without modifying a multi-value data and a fluorescent sign pen for a color marker. CONSTITUTION:A signal from signal extraction circuits 5, 6 are separated into a color code data represented in 2-bit and a density data represented in 6-bit at a color separation circuit 7. An area extraction circuit 11 extracts an area designated by using a color marker being a fluorescent sign pen in advance onto a color original. A color designation signal BBR and a processing designation signal A are given to a color data selector 12 and the color designating an area and the processing corresponding thereto are preset in the inside. A binarization circuit 14 binarizes a data outputted from a binarization ROM 15 by using a threshold value selection data or a data from an EE circuit 14 for automatic density setting.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an apparatus that reads a color image of a document and performs image processing.

[Prior Art] For example, Japanese Patent Laid-Open Nos. 57-147374 and 1982-62769 are known as apparatuses that image a document, separate the images into colors such as black, red, and blue, and then make copies. These are the second
As shown in the figure, image sensors 21 and 22 such as COD
The obtained analog signal is operated by an operational amplifier 23 and AGC circuits 24 to 26, binarized by binarization circuits 27 to 29, and the binarized data is operated by an arithmetic circuit 30 to perform color separation. Is going. Therefore, in such a device, processing of image data (for example, MTF correction, enlargement/
If you want to perform reduction, γ correction, etc.), you must perform it on the analog image signal group before color separation, or perform binarization on the 1' image data group after color separation, which can only be processed in a limited manner. There are only two ways to do it.

However, in the former case, multiple circuits are required, and processing is difficult because analog signals are used. On the other hand, in the latter case, although processing such as enlargement and reduction is possible, the possible processing is limited by the fact that it is binary image data, and it is difficult to obtain high image quality.

Additionally, it has been known that unnecessary colors exist in image data after color separation, which causes image quality deterioration.
The method for removing these unnecessary colors is based on color-separated binary information. Therefore, in the conventional color separation method, it is very difficult to perform image processing after color separation.

If processing is performed before color separation, various dispersion factors will be affected by each process, making color separation difficult or removing unnecessary colors.

Therefore, in order to solve the above-mentioned drawbacks, a method has been proposed in which, instead of performing color separation after binarization, color separation is performed as is in multi-valued data, and various image processing is performed after the color separation.

[Purpose of the invention]

An object of the present invention is to enable processing regarding a designated area to be performed using the above-described processing method.

〔Example〕

Examples of the present invention will be described below. FIG. 1 is a diagram showing one embodiment thereof. The color image information (optical image) of the original is separated into two colors (red and cyan) by a dichroic mirror and read by CCD1.2.
Each of them undergoes shading correction simultaneously with A/D conversion processing by the A/D converter 3.4. 5.6 is a signal extraction circuit consisting of a gate, which extracts only the signal of the maximum document width. The signal from the signal extraction circuit 5.6 is separated by the color separation circuit 7 into color coat data represented by 2 bits and density data represented by 6 bits. Then, the color-separated image data is corrected for color ghosts in the main scanning direction (horizontal scanning direction) in the main scanning color ghost correction circuit 8, and then in the sub-scanning direction (horizontal scanning direction) in the next sub-scanning color ghost correction circuit 9. Color ghosting in the direction of drum rotation of the electrostatographic reproduction device is corrected. These are intended to improve image quality by removing unnecessary color ghosts that occur during color separation, especially around black characters.

Reference numeral 10 denotes an MTF correction circuit for correcting resolution, and reference numeral 11 denotes an area extraction circuit that extracts an area specified in advance with a color marker made of a fluorescent pen on a color original.The color code and area signal of the extracted area are extracted here. , is input to the color pig selector 12. A color designation signal BBR and a process designation signal A are input to this color data selector 12, and a color designated for an area and a corresponding process are preset inside.

That is, for example, if the color marker is red, enlargement, reduction processing,
The marker color and image processing function are set in a one-to-one relationship in advance, such as trimming (extracting only the image in the specified area) for yellow, and masking (not importing the image within the specified area) for blue. It is set. 13 is an 88 circuit for automatic density setting, 14 is a binarization circuit, and this binarization circuit 14 is a binary ROM 1 based on dark value selection data
The data output from the EE circuit 14 or the data output from the EE circuit 14 is subjected to binarization processing. 16 is an interface for a laser printer. Note that the image information regarding the portion of the marker color may not be sent to the printer interface 16. In this case, the information regarding the marker color may be deleted last. Furthermore, when copying a document whose area is designated by a marker color, it is also possible not to record the color marker portion.

〔Effect of the invention〕

In this way, in the present invention, since a fluorescent pen is used as a color marker, area designation can be performed reliably.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram of a color image processing apparatus according to an embodiment of the present invention, and FIG. 2 is a block diagram of conventional image processing. Agent: Patent Attorney Tsuneaki Nagao Procedural Amendment Form 1. Display of the case Patent Application No. 121739 No. 121739 of 1988 2, Name of the invention Color image processing device 3, Person making the amendment Relationship to the case Patent applicant address 1-26-2 Nishi-Shinjuku, Shinjuku-ku, Tokyo Name
Name (127) Roku Konishi Photo Industry Co., Ltd. 4, Agent 5, Date of amendment order July 28, 1988 6, Number of inventions increased by amendment None 7, Subject of amendment
Drawing 8, Contents of amendment All drawings will be corrected as shown in the attached sheet.

Claims (3)

[Claims] (1) An apparatus capable of specifying a specific area of a document with a color marker and performing image processing within or outside the specified area after color separation and before binarization, wherein the color marker A color image processing device characterized in that a fluorescent pen is used as a color image processing device. (2) The color according to claim 1, characterized in that when recording is performed after processing the inside or outside of the area designated by the color marker, the color marker portion is not recorded. Image processing device. (3) A color image processing apparatus characterized in that the color marker portion is not recorded when copying a document whose area is designated by the color marker.