JPS639272A - Digital color picture editing device - Google Patents

Abstract

PURPOSE:To replace a color of an original into an optional color in red, green and blue components in an optional designated region in the original by designating an optional region in the original and outputting the red, green and blue component selectively between boundary points. CONSTITUTION:A device 3 designating the edition region and content and a circuit 302 representing the boundary point of the region in the main scanning direction at each line decided by the data are provided. A processing data selection circuit 304 obtains an L signal at the boundary point of the region and selects and outputs a signal from the data red R, green G and blue B to be processed at each boundary point signal. In applying partial color change, the row of the output color R is set in a selection circuit 304r as R, G, R, A, B. The R data is outputted at first, the G data by the L signal of the boundary point, the R data by the next L signal and then the R, B, R data are outputted as the red data. Similarly, an output color is set respectively to selection circuits 304g, 304b and 1 the setting value to the selection circuits 304 is revised by the setting value of new line depending on the line signal.

Description

Detailed Description of the Invention (Technical Field) The present invention is a digital color image that separates a color image, converts it into digital signals, writes each color on a photoreceptor with a laser, and superimposes the color images on a recording paper. The present invention relates to an image editing device such as a partial color changing device.

(Prior Art) Various devices and methods have been proposed in the past for specifying 61 areas of a document image to specify a specific area to be edited in the document image.

For example, there is a method of displaying the original image on the display screen and then using a light ben or the like to specify the area to be edited, but this method makes the entire device complicated and large. There are drawbacks.

In addition, as a simple means for easily specifying a specific area in a document image, two positions in the X-Y coordinates of the document placed on the contact glass on the document table are designated as addresses. It is also known to provide a lever mechanism that can be used to designate an area surrounded by a set line on the X-axis and a line on the Y-axis as an area to be image edited. but,
In such a method of specifying a specific area in a document image, there is a large deviation in the specified values, and it is difficult to simultaneously specify and judge a plurality of areas. Furthermore, when a scanner separates and reads a document image pixel by pixel (or when recording an image in blocks), the document surface is divided into pixels or integral multiples of pixels, and the divided main There is also a method in which two arbitrary points on the document surface are specified based on each address in the scanning and sub-scanning directions, and a rectangle with the two specified points as diagonals is treated as a specific area to be edited. It is publicly known.

However, in this case, the only image editing area that could be specified was a rectangle that could be represented by two diagonal points, so when editing a polygonal area that could be represented by a set of rectangles, it would have to be specified multiple times. Ta.

Furthermore, in the past, changing colors within a specified area was done using software processing, which made it impossible to process in real time and required a frame memory to store the entire screen.

(Purpose) The present invention solves the drawbacks of the conventional example, and uses a digital color imaging device to specify an arbitrary area in a document and store the RGB components (red, green, and blue components) in the area in a frame memory. The purpose of this is to make it possible to replace any color in RGB without any color.

(Structure) To achieve this, the present invention includes a device for specifying the editing area and contents, a circuit for indicating the boundary points of the area in the main scanning direction for each line determined from the data, and red and red lines to be processed between the boundary points. , green, and blue components and output them as red, green, and blue components.

An embodiment of the present invention will be described below.

FIG. 1 is a general configuration diagram of a digital color image device having an editing function. 1 is an image output device, and 2 is an image reading device. 3 is an area specifying device, which determines a point or area on the document by the distance from a certain reference point on the area specifying device 3.
- It is specified by the y coordinate. 4 is an input device for specifying a point on the area specifying device 3; Image reading device 2
Then, the color density of the original is separated into three colors, RGB, and measured for each pixel. The measured data is sent to the image output device 1, and after being subjected to various processing, it is converted into Bk (black), Y (
The data is converted into data of (yellow), M (magenta), and C (cyan) and output to a laser.

The latent images of each color written on the photoreceptor by a laser are B
It is developed into K, YXM, and C colors and becomes a visible image, which is then printed on transfer paper.
Obtain a collage copy by being superimposed on it.

FIG. 2 is a block diagram of the system.

Pixel data input from CCD 100 101 to 10
In the block not shown in 3, shading correction and γ correction are performed, and the image editing circuit (11104)
Editing processing such as partial color change is performed to exchange B data in an arbitrary combination. After the sheep, subtractive color mixture data Y, M, C, and Bk are created by the complementary color generation circuit 105, the masking processing circuit 106, and the OCR processing circuit 107.
This is converted into binary data by the halftone processing circuit 108 and stored in the line memory 109.

The image processing circuit (21110 is a circuit that performs movement, mirror image processing, and other image processing) masks part of the data in the line memory 109 and changes the timing and address for reading data in the line memory 109. Laser driver 112 is driven according to the data, and laser 113 is controlled.

Note that the CCD 100, line memory 109, laser driver 112, laser 113, etc. are provided for each color.

114 is a circuit that controls the period of 101 to 112.

Further, the external interface circuit 117 is an interface circuit for inputting data from an external input device other than the input from the ccn.

201 to 206 are control and arithmetic circuits including a CPU;
Data from the area specifying device 3 shown in FIG. 1 is input to the input port of the I10 port 201.

The present invention relates to an editing function regarding partial color change by an image processing circuit (11104).

FIG. 3 shows an area in which partial color change of a document is performed. Let the main scanning direction be X, the sub-scanning direction be y, and the scanning start point 0 be the origin (0, O). Color change processing is performed in the shaded areas p, q, and r. Now, if in area p, RED
and GRF, EN, and in region q, G RE E N
,! = B L U E, and B L U E in region r
Suppose we want to change the UE and REDO colors.

That is, in the area p, an image that was red in the document is output as green, and an image that was green in the original is output as red. Similarly, consider regions q and r. This information is provided by the area specifying device 3 in Fig. 1.
7 is input and sent to the image output device 1. These pieces of information are determined by the CPTJ 202 in FIG. 2, and a code is set in the image editing circuit (11104).

Assume now that line 1 in FIG. 3 is to be scanned. CPtJ202 by y data indicating the address of the line.
sets the addresses in the X direction of points S, A, BC, D, and F, which indicate the boundaries of the area, in the image editing circuit (1)]04.

Also, SA for each RGB color.

The colors of data to be processed between AB, BC, CD, r)E, and EF are set in the image editing circuit fl) 104 in the order of scanning. This is shown in a table in FIG. In this case, the output of RED is R, G, R, R, B every time the boundary area comes on the main scan.
, R is processed and output. Similarly, the output of GREEN is G, R, G, B.

G, G data are processed and output, and Blue output is 13. This is the result of processing B, B, G, R, and B data. By setting this for each line, an image with different colors in areas p, q, and r in FIG. 3 is output. 'Also, if O data that does not output anything is processed instead of the color change data in Figure 4, masking and trimming that do not output an image within or outside the specified area can also be processed using the same circuit. can.

Examples are shown below.

FIG. 5 shows the image editing circuit full in FIG. 2.

4 is shown. According to the editing information manually inputted from the area specifying device 3, the CPU calculates the address in the main scanning direction of each boundary point of the area through the comparators (1 to n) through Ilo.
Set to 3Q2. On the other hand, the address counter 301 is
The data CLK is counted and the main scanning direction IS address of the pixel being input is given to the comparator (1 to n) 302.

Address counter 301 is reset and initialized by a line signal. At the same time, a comparator (1 to n
) 302 is set with the address of the boundary point of the new line. However, the area is specified so that the number of boundary points is n or less. The comparators (1 to n) 302 give a low signal of one clock (data CLK) to the OR circuit 303 when the boundary point is reached.

As a result, the processing data selection circuit 304 obtains a LOW signal at the boundary point of the area. Data to be processed for each region is set in the processing data selection circuit 304 in order in the main scanning direction, and data R, G to be processed is set for each boundary point signal.
, B data is selected and output.

When changing the color of a portion as shown in FIG.
, R, B, R) are set, the first is R data, the low signal at the boundary point is G data, and the next Low signal is R data.
Data, hereafter, R, B, R data is T? Output as data of Er). Similarly, the processing data selection circuit 304
In g, line G in Figure 4 (G, R, G, B, c, c)
, 304b has B rows (B, B, B, G,
R, B) are set.

The setting value to the 304 processing data selection circuit is changed to the setting value of a new line by the line signal.

An example of the processing data selection circuit 304 is shown in FIG. 6.The set values are as shown in FIG.

The lower bits of the set values of the shift registers 401, 402, and 403 are shown in the lower part of the diagram, and only the lowest bit of the output is taken and used for the gate. In this case, one 8-bit shift register is used for each shift register, so the boundary point is 8
You can only set up to These set values are set by C and PtJ through I/('). 304 similar circuits
g, used for 304b. Further, when erasing an image by masking or trimming, all the corresponding bits of each shift register may be shifted to I and OW.

FIGS. 7 and 8 are flowcharts showing the above-mentioned control operation.

In the figure, Xn-Yn are both values obtained by increasing the distance between dots in the main scanning direction and the sub-scanning direction.

In addition, N indicates the number of vertices of the region, and Min(X, ,
) indicates the smallest of the boundary points X, , on the line fl2.

(Effect) According to the present invention, RGB in a specified area in a document
Since the components can be converted to any RGB component color, free color editing is possible. Furthermore, masking and trimming can be performed using the same circuit.

[Brief explanation of the drawing]

FIG. 1 is an external perspective view of a digital color image device having an editing function, and FIG. 2 is a system block diagram according to the present invention.
Figure 3 is a diagram showing the area where partial color change is performed on the original, Figure 4 is a diagram showing RGB output data for each color change area, and Figure 5 is a diagram showing the RGB output data for each color change area.
The figure is a block diagram of the image &li collection circuit (1) in Figure 2, Figure 6 is a diagram showing an example of the processing data selection circuit in Figure 5, and Figures 7 and 8 are related to the control operation of the present invention. It is a flowchart. 3rd cause 7th figure

Claims (1)

[Claims] A device for specifying editing areas and contents in a digital color image device that separates a color image and converts it into digital signals, writes each color on a photoreceptor with a laser, and superimposes the color image on recording paper. A circuit that indicates the boundary points of the area in the main scanning direction for each line determined from the data, and selects the red, green, and blue components to be processed between the boundary points and outputs them as red, green, and blue components. A digital color image editing device having a circuit.