JPS63286068A - Color picture processing device - Google Patents

Abstract

PURPOSE:To improve the operability by applying color separation without modifying multi-value data and making the processing relating to a designation area correspondent to a marker color. CONSTITUTION:A signal from signal extraction circuits 5, 6 is separated into a color code data representing in 2-bit and a density data represented in 6-bit at a color separation circuit 7. An area designated in advance by a color marker is extracted from a color original by using an area extraction circuit 11. A color designation signal BBR and a processing designation signal A are inputted to a color data selector 12 and the color designating the area and the processing corresponding thereto are preset in the inside. That is, when the color marker is, e.g., a red color, the magnification/reduction processing is applied, in case of the yellow marker, the trimming (only a picture of a designated area is extracted) processing is applied and in case of blue color marker, the masking is applied. In this way, the marker color and the picture processing function are preset corresponding each other by 1:1.

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.

[Conventional technology]

2. Description of the Related Art Japanese Patent Laid-Open Nos. 57-147374 and 1982-62769 are known as apparatuses that image a document, separate it into colors such as black, red, and blue, and then make copies. These are the second
As shown in the figure, an image sensor 21J22 such as a CCD
The obtained analog signal is calculated by the operational amplifier 23 and the AGC circuits 24 to 26, converted to 2 degrees by the binarization circuits 27 to 29, and the data after the binarization is calculated by the calculation circuit 30 to convert the color. Separation is taking place. Therefore, when processing image data (for example, MTF correction, enlargement/reduction, γ correction, etc.) in such a device, it must be performed on a group of analog image signals before color separation, or only a portion of the image data must be processed. There are only two options available: to perform the processing on a group of binarized image data after color separation, which can only be processed in a limited manner.

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 use the above-described processing method to make processing related to designated areas correspond to marker colors.

〔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 graphical mirror and read by a 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.

10 is an MTF correction circuit that corrects the resolution; 11 is an area extraction circuit that extracts an area specified in advance with a color marker on a color document; the color code and area signal of the area extracted here are sent to the color pig selector 12; Enter. This color data selector 12 receives a color designation signal BBR and a process designation signal A, and has a color designated for an area and a corresponding process set therein in advance. That is,
For example, if the color marker is red, it will be enlarged or reduced; if it is yellow, it will be cropped (extracts only the image in the specified area); if it is blue, it will be masked (the image in the specified area will not be imported). and the image processing function are preset in a one-to-one relationship. 13 is an EE circuit for automatic density setting, and 14 is a binarization circuit. This binarization circuit 14 converts the data output from the binarization ROM 15 or the data from the EE circuit 14 into binary values according to the dark value selection data. processed. 16 is an interface for a laser printer. Note that the above-described one-to-one setting between the color of the color marker and the image processing function can be similarly set for density change, MTF correction, and the like.

〔Effect of the invention〕

In this way, in the present invention, the color of the color marker and the image processing function are set in a one-to-one relationship, so that the operability is significantly improved.

[Brief explanation of 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 (Gagen 0□□□ 71, Jll #B Eka Showa 6
August 6, 2015 1, Display of the case Patent Application No. 121738 of 1988 2, Title of the invention Color image processing device 3, Person making the amendment Relationship to the case Patent applicant address 1 Nishi-Shinjuku, Shinjuku-ku, Tokyo Chome 26-2 Name
Name (127) Konishiroku Photo Industry Co., Ltd. 4, Agent address 4-12-1, Ginza, Chuo-ku, Tokyo 8104
No. Mizuho Daiichi Building 3rd floor ffi 03-545-81
506, Number of inventions increased by amendment None 7, Subject of amendment Drawing 8, Contents of amendment All drawings shall be corrected as shown in the attached sheet.

Claims (1)

[Claims] (1) In a device that captures color images and performs image processing, a specific area of the document is designated with a color marker, and after color separation, 2
A color image processing device, characterized in that before conversion, image processing is performed within or outside the designated area, and the color of the marker and the image processing function are in one-to-one correspondence.