JPS63141448A - Color picture editing device - Google Patents

Abstract

PURPOSE:To designate a print color at each small area by writing attribute information relating to edition into an attribute storage means and executing various editions in real time so as to apply monochroic print at plural small areas. CONSTITUTION:Each color signal of an original read by a CCD 1 is converted into a digital value by A/D converters 4a, 4b, 4c and after shading correction processing is applied by shading circuits 5a, 5b, 5c, the result is inputted to a color processing circuit 7. Signals Y, M, C signals after the masking correction processing in matching with the ink characteristic of an output printer in the color processing circuit 7 are generated. Any of the Y, M, C signals is outputted as a color mode signal and a signal being the average of color density of red, green and blue is outputted as the monochroic mode signal. The signals enter a selector 9, are selected based on the attribute information stored in an attribute RAM 8 and the result is sent to a comparator circuit 12.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a color image editing device capable of image editing.

(Prior Art and Problems to be Solved by the Invention) A digital color copying apparatus reads a color document using a color sensor and prints the document.

Since color originals are read as digital values, data processing becomes easier. Therefore, it is essential that the digital color copying device be equipped with the ability to perform various editing operations.

Some of the black and white image leagues are equipped with attribute memory in order to be able to perform various editing functions without having to have a large image memory (patent application filed by the applicant in 1983-24).
(See No. 836). Attributes of image data are stored in an attribute memory, and various edits are performed in real time by editing this attribute data. Color images cannot be edited with this image reader.

For color images, there is a method that specifies an area on the document using a specified color for each scanning line, and performs image editing (masking, black/red color conversion) within that area in real time (
(See Japanese Unexamined Patent Publication No. 58-60875). However, complex editing such as changing the editing mode for each area is not possible.

An object of the present invention is to provide a color image editing device that can edit a color image using an attribute memory.

(Means for Solving the Problems) A color image editing apparatus according to the present invention includes a color density reading means for reading the color density of a color document separated into three colors using an image sensor, and an attribute related to a specified color and a fixed color or a fixed color. Attribute setting means for setting image editing attributes including attributes for specifying printing for each predetermined area of the image; attribute storage means for storing the editing attributes set by the attribute setting means; and storage in the attribute storage means. and image editing means for editing the data of the color original read by the color density reading means in accordance with the edited attributes.

(Operation) Attribute information regarding editing is written into the attribute storage means, and various edits are executed in real time. At this time, single-color printing can be performed on a plurality of small areas, and furthermore, the printing color can be specified for each small area.

(Example) Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

(a) Color image editing using attribute memory In this embodiment, an image is divided into areas of, for example, 1 mm x 1 mm, and attributes such as binary/halftone for each area are written in the attribute memory for editing.

The attribute data written to the attribute memory is 8 bits (d7.
d6. ..., do), and each bit does not indicate the attribute information shown in Table 1. That is, d7 is
Instructs to fill with a single color. d6 instructs to invert the output signal. d5 instructs whether to perform binary processing or dither processing depending on the color density of the read pixel. d4 is
Specify whether to print in single color mode. d3 to d1 are d7. This is used to specify colors related to d4, and the color correspondence shown in Table 2 is performed. do requests the output device to prohibit recording on the recording medium.

Table 1 Attribute information d7 - Invalid pixel/valid pixel d6: Inverted/non-inverted d5, binary/halftone d4: Fixed color/normal Table 2 Single color specification (color code) d3 d2
d, Specified color 0 0 0 'White 001 Yellow 0 1 0 Magenta 011 Red 1 0 0 Cyan 101 Green IIO Blue III Black Using the attribute memory explained above, masking, trimming, specified color single color mode, full color halftone mode etc. can be edited. An example will be explained using FIGS. 2 and 3.

Now, read a color original as shown in Figure 2, and
Suppose we want to process and output each part of F as follows. That is, part A is a full-color halftone part.

Portion B is a single-color halftone portion, and here blue is specified as the color, so even if the intermediate portion of the document is a full-color photograph, it is reproduced as a blue halftone.

Part 0 is a multicolor character part, and one of the eight colors shown in the color code is selected for each pixel. This mode is effective for reproducing text in multicolor printing.

Part 0 is a monochrome character part, and here black is selected as the specified color.

Part E is a part that reproduces white characters. Here, red is selected as the background color.

Section F is a section filled with a designated color, in which yellow is selected here.

At this time, it is sufficient to write data into the attribute memory as shown in FIG.

When outputting, as will be explained later, part A is subjected to full-color halftone processing, part 0 is not subjected to binary processing, etc.]
mmX] Processes and outputs an area in mm units corresponding to the data in the attribute memory.

(b) Color Image Editing Apparatus FIG. 4 schematically shows image reading by the color image editing apparatus. Light emitted from a fluorescent lamp (2) serving as an exposure source illuminates the document (+02) on the document glass (101), and the reflected light enters C0D(]) through an optical system (not shown). The CCD (1) is equipped with a filter that selectively transmits the three colors of red, green, and blue for each pixel, and the C0D (1) is equipped with a filter that selectively transmits the three colors of red, green, and blue.
Outputs the reflected light intensity as a result of color separation.

These fluorescent lamps (2), optical system, and C0D (+) are one unit, and a drive system (scanner) (not shown)
The scanner moves as shown by the arrow, keeping a constant distance from the original glass (101), and scans the original (+02). Control of this drive system may be performed by the CPU (3) shown in FIG. 1, or a separate CPU may be provided.

A reference white plate (103) is provided on the original glass (101) outside the original area.

The color signal information regarding the original document (102) obtained in this way is outputted to the image memory device of the color printer device 2, which serves as a recording medium, through a processing system having a block configuration as shown in FIG.

Image editing attributes are instructed by the operation panel (I5), and the attribute data is stored in the attribute memory (8) via the CPU (3).
). An output signal is obtained from the color signal obtained from C0D(+).

First, the reference white plate (+0
3) While obtaining the output of C0D(+), the CPU
(3) instructs the line RAM (6a, 6b, 6c) to write the image signal. The CPU (3) refers to this content and converts the A/D converters (4a, 4a, 4. b, 4. c) reference voltage (V
refRlvrefG, VrefB).

After setting VrerR, G, and B, line RAM (6a
, 6b.

The data written in 6c) is held as reference data for shading correction. Now, when the scanner enters the document area, the CPU (3) uses the fluorescent lamp (10
1) Set the exposure amount. Each color signal under such exposure amount is transmitted to an A/D converter (4a, 4b,
4c), the data is converted into a digital value by shading circuits (5a, 5b, 5c), and then subjected to edding correction processing, and then input to a color processing circuit (7). In the color rendering processing path (7), the signals Y, M, and C are processed after performing mass ink correction processing that matches the ink characteristics of the output printing device.
generate. If the output device is a printer that performs side-by-side printing, it is advantageous in terms of memory reduction to repeat the scan for the number of print colors and output the necessary output signal (Y, M, or C for each scan). (Here, the explanation is given in the form of "-" sequential output, but Y, M
, C at the same time, it is sufficient to parallelize the color processing circuit and subsequent circuits for each printing color, so there is essentially no restriction by the printing method. ) Among the output signals of the color processing circuit (7), any one of Y, M, and C is shown as a "color mode signal" in FIG. Additionally, the color density average (or weighted average) of red, green, and blue is calculated simultaneously and output as a "monochrome mode signal." This corresponds to the density signal when the original is treated as monochrome. Both the ``color mode signal'' and the ``monochrome mode signal'' are input manually to the selector (9).

The selector (9) is given a bit d4 indicating attribute memory information of the position corresponding to the current document reading position as a select signal, and in the case of d4-φ, a monochrome mode signal is transmitted downstream, and d,= In the case of t, a color mode signal is transmitted.

The dither ROM (11) generates halftone threshold values, and the threshold values are generated at a matrix period of (mXn). The selector (10) selects the data from the dither ROM (]I) and the binary threshold value information according to the singability information d5, and sends them to the comparison circuit (12). A comparison circuit (12) compares the signal (image signal) from the selector (9) and the signal (threshold information) from the selector (10). Also, the comparison circuit (I2)
, d7 and d4 to dl are input as control signals. Here, (1) d7-φ.

If d4-φorl, the output of the comparison circuit (12) will always be a constant value according to the color code. For example, if scanning is currently being performed to obtain a Y signal, if d,=1, the output of the comparator circuit will be "B", and if d, -φ, the output will be "φ°'. (2) If d7 = I, d, -φ, bit h of the color code related to the print color to be scanned. If the bit is h month, the comparison result is output as is, and if the same bit is φ, The output becomes "φ".

(3) If d,=I, d4=1, output the comparison result as is. The inverted data is also sent to the selection output circuit (14) via the inverter (13). The selection output circuit (I4) outputs inverted or non-inverted data according to d6 in synchronization with the effective image signal from the CPU (3).
The data is output to a printer device and a memory device (not shown).

(Effect of the invention) Color images can be edited in real time using only the attribute memory without wasting the memory of the full screen size. At this time, a wide variety of editing is possible, such as being able to simultaneously output an area that reproduces the original image in full color and multiple small areas that reproduce it in specified colors.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of an image data processing circuit. FIG. 2 is a diagram of an example of color image editing. FIG. 3 is a diagram of attribute data stored in the attribute memory. FIG. 4 is a diagram of an optical system for reading a document. 1...CCD, 3...CPU, death/attribute memory,
15 Operation panel.

Claims (1)

[Claims] (1) A color density reading means that uses an image sensor to read the color density of a color document separated into three colors; Attribute setting means for setting each region; Attribute storage means for storing the editing attributes set by the attribute setting means; and Color density reading means for reading out the editing attributes stored in the attribute storage means 1. A color image editing device comprising: image editing means for editing data of a color original.