JPH05130373A - Original area designation device - Google Patents

Abstract

PURPOSE:To reduce an area discrimination processing time by discriminating whether or not a coordinate position corresponding to coordinate position information read by an area discrimination means is in existence in a designated area sectioned by a locus. CONSTITUTION:An original placing port 102 is used to enter a locus of an area and its locus discrimination data is stored in a bit map memory 111. Locus discrimination data A0 for each coordinate and locus discrimination data A1 read just precedingly are read. Moreover, main scanning area data A2 whose value is kept as it is till locus discrimination data representing a succeeding locus are read in the main scanning direction, the preceding line locus discrimination data A3 being locus discrimination data of coordinate position in the same main scanning direction at one preceding line and locus discrimination data representing locus are read. In this case, whether or not a coordinate position corresponding to the data A0 in a discrimination block of an area changeover 112 is within the designated area is discriminated based on the line area data A4 whose value is kept as it is in the coordinate position in the same main scanning direction.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a manuscript area designating apparatus used for designating a particular area of a digital image processing apparatus and editing an image of the particular area.

[0002]

2. Description of the Related Art In recent years, in digital copying machines, copying machines for editing (eg, trimming, masking, reversing, painting, etc.) a specific area of an original have been commercialized. The area designation method in such a copying machine is to designate a rectangular area by designating two points or a combination of the rectangles, or a polygonal area configured by sequentially designating three or more points. .. In such an apparatus, for example, a quadrangle can be designated by coordinates of only two points, and there is an advantage that a memory for storing coordinate data is small.

However, on the other hand, it is almost impossible for such a device to specify a complicated shape.

Therefore, Japanese Patent Laid-Open No. 1-212072 proposes a document area designating apparatus for designating a complicated shape, the outline of which will be described below. That is, in this conventional technique,
A document mounting board for detecting the coordinate position by pressing, a non-rectangular designation mode setting means for designating an area using a continuous line, and a bit map for storing the coordinate position by pressing when the non-rectangular designation mode is set. It has a memory and stores the coordinate position pressed by the original placement board by the non-rectangular area designating operation in the bit map memory, and sequentially reads the stored data from the bit map memory at the end of the non-rectangular designating operation. , Check whether the continuous line is connected or not connected,
If not connected, the stored data in the bit map memory at that position is cleared. Then, when it is finally determined that the continuous line stored in the bit map memory forms a closed loop, the area designating operation is terminated and a predetermined image processing is performed on this closed loop. If it is determined that the closed loop is not formed, a display for instructing re-input is displayed.

It should be noted that 3 × 3 with the position of interest within the continuous line as the center
The matrix is formed, and the case where there is no designated position other than the center is not connected. In addition, when determining whether or not to form a closed loop, all designated positions other than the unconnected position are 2
It is connected to the above specified position (3 x centering on the position of interest)
There are two or more designated positions other than the center of matrix 3).

A document mounting board is shown in FIG. In FIG. 2, 301 is a document receiver, 302 is a stylus pen for designating coordinates, 303 is a mode select area for designating a non-rectangular mode, 304 is a document reference position mark, 30
5 is an interface cable with the main body of the image processing device,
Reference numeral 306 is a coordinate plate on which a document is placed. That is, the area is designated by the document reference position mark 3 on the document mounting board 102.
The document is set on the coordinate plate 306 in accordance with 04. Then, the non-rectangular mode is selected from the mode select area 303, the area designation start switch is pressed, and the area is designated by the stylus pen 302. Document mounting board 10
Resistors are arrayed in a grid pattern in the X and Y directions inside 2. When a part of the coordinate plate 306 is pressed by the stylus pen 302, the detection device detects the voltage between the resistors, The detection data is transmitted to the main body of the image processing apparatus as coordinate position data. When the area designation is completed, the area designation end switch in the mode select area 303 is pressed.

Now, when it is judged that the continuous line is a closed loop,
Data is sequentially read from the bit map memory. That is, the data is sequentially read in the direction perpendicular to the scanning direction of the reading unit for reading the original, that is, in the main scanning direction.
When one line is completed, the process moves to the next line (scanning direction of the reading unit, that is, sub-scanning direction). When the data 1 is detected for each line and then the next data 1 is detected, the space between them is filled with the data 1. Further, when the data 1 is detected next and the next data 1 is detected, the process of filling the space between the data 1 is similarly performed. Hereinafter, this process is repeated until one line is completed. When one line is completed, it moves to the next line and the same processing is performed.

The area of the data 1 written in the bit map memory after the above processing is the designated area for image editing. As described above, in the conventional technique, the data in the bit map memory is read twice and the writing process is performed.

FIG. 3 shows an example of the locus in which the area is designated by the above procedure.

FIG. 4 shows a state in which the locus designated in FIG. 3 is written in the bit map memory.

In FIG. 4, data 0 is written in advance in blank portions other than data 1.

[0012]

As a result of performing the processing of filling the area in the locus with the data 1 using this locus data,
An example is shown in FIG. In the conventional method, as shown in FIG. 21, data 1 may be filled up outside the desired area, or data 1 may be left unfilled within the desired area. Furthermore, by reading the data written in the Bitmap memory,
The data in the designated area surrounded by the locus has to be rewritten, which requires rewriting processing time.

The present invention has been made on the basis of such a background, and when an original is traced on a document placing board by a pen or the like to form a closed loop and an area is designated, an extra burden is imposed on the operator. It is an object of the present invention to provide an original document area designating apparatus which can form an accurate closed loop and easily specify an area without being applied.

[0014]

The above-mentioned object is to trace a document mounting board which detects a coordinate position corresponding to a predetermined position of a document by pressing, and a non-rectangular boundary of a designated area on the document mounting board. In a document area specifying device including a locus information storage unit that stores coordinate position information of a locus pressed by
When the area designation mode is selected, the coordinate position information stored in the locus information storage means is sequentially read line by line in the main scanning direction, and the read coordinate position information and the last read coordinate position information. When the coordinate position information and the coordinate position information indicating the locus are read,
In the main scanning direction, the main scanning area information in which the coordinate position information indicating the locus is maintained as it is and the same main scanning direction coordinate position one line before are read out until the coordinate position information indicating the next locus is read. When the front line coordinate position information which is the coordinate position information and the coordinate position information indicating the locus are read, the coordinate position indicating the next locus is in the line direction and at the same main scanning direction coordinate position. Based on the line area information in which the coordinate position information representing the locus is maintained as it is until the information is read, a designated area in which the coordinate position corresponding to the read coordinate position information is divided by the locus. This is achieved by having an area discriminating means for discriminating whether or not it is inside.

[0015]

When the area designation mode is selected, the non-rectangular boundary of the designated area is traced and pressed on the original placement board to store the coordinate position information of the trajectory in the trajectory information storage means, and then the trajectory information in the storage means. During the read operation of sequentially reading the stored coordinate position information line by line in the main scanning direction, the read coordinate position information, the immediately preceding coordinate position information, the main scanning area information, the previous line coordinate position information, and the line area information. Based on the above, the area discriminating means discriminates whether or not the coordinate position corresponding to the read coordinate position information is in the designated area divided by the locus.

[0016]

1 is a control block diagram of a digital color copying machine according to an embodiment of the present invention. The entire control of this device is performed by the system controller 100 including a microcomputer. Timing circuit 10
3 is a synchronization signal CLK for transmitting an image signal of 1 pixel,
A line synchronization signal LSYNC indicating the beginning of a line for reading an image described later is generated. Line sync signal LSYNC
Is generated based on the main scanning synchronization signal PLSYNC that appears in synchronization with the scanning position of the polygon mirror of the laser printer 109.

The image scanner 104 has a pixel resolution of 1
6 dots / mm photoelectric conversion element (CCD) R, G, B
Read the image signal of each color. When reading the image,
A document is placed on an image scanner 104 similar to the document placing board 200 of the conventional example shown in FIG. 2, and the CCD is mechanically moved in the Y direction (sub scanning direction) perpendicular to the X direction (main scanning direction) in FIG. The color image is read by driving and scanning. The image scanner 104 A / D-converts the color image signal read by the CCD, performs shading correction, and outputs each as 8-bit color image (pixel) information.
This image information is output to the laser printer 109 after undergoing various processes in the image processing unit.

The image processing unit includes a density conversion unit 10.
5, color correction / UCR (under color removal) unit 106, filter 1
07 and each unit of the editing unit 108 are provided.
The density conversion unit 105 converts the R, G, B color image information into density information. In the color correction / UCR unit 106,
As shown in the formula of FIG. 19, the color information of R, G, B is converted into the information of each color of C, M, Y.

The parameters ri, gi, b are added to the equation of FIG.
By appropriately setting i, ki (i: 1 to 3), it is possible to convert to any color.

Then, the black component included in the color obtained by combining all the Y, M, and C components obtained by the equation of FIG. 19 is extracted and output as BK, or from each of the Y, M, and C components. The color information obtained by subtracting the BK component is output. Which color information is output is instructed by the system controller 100. That is, the color image data that has been input in parallel up to this point is converted into frame-sequential image data for each color of Y, M, and C here. Therefore, when printing in full color, four exposure scans are performed. The filter 107 performs edge enhancement or smoothing processing on each image. Editorial department 1
In 08, processing such as scaling in the main scanning direction, italics, and mirroring is performed.

Area switching unit 112 according to the main part of the present invention
From this, a switching signal is input to the density conversion unit 105, the color correction / UCR unit 106, and the filter 107. This is used to switch the processing of each area to the specified processing when the processing content is changed inside and outside the area specified by the area specification described later. That is, the density conversion unit 10
5. In the color correction / UCR unit 106 and the filter 107, since the processes are switched in real time, the processes are performed in parallel, and the process result selected by the area signal is output.

For example, the density conversion unit 105 can simultaneously perform the conversion and the negative / positive inversion processing. In addition, color correction
The UCR unit 106 can simultaneously perform the full color mode and the process of converting to an arbitrary color. In addition, the filter 107
Can perform edge enhancement and smoothing processing simultaneously.

The document mounting board 102 can specify the area of the A3 document (302 mm in the X direction and 438 mm in the Y direction in FIG. 2) and has a coordinate resolution of 0.5 mm. That is, 8 × 8 pixels are the unit for specifying the area. Therefore, the bit map memory 111 only needs to secure an area of 530 kilobits, but has a memory of 1 megabit (a field of 1024 in the X direction and 1024 in the Y direction) for easy addressing. In addition, the memory management unit 110 controls the writing and reading of the trajectory determination data in the bit map memory 111.

When the operator sets the number of copies, sets an area-specified inner process, or performs an operation such as copy start, the operation board 101 outputs such operation information.

Original setting board 1 when the non-rectangular mode is set
Bit map memory 1 of the coordinate data read from 02
The area designation processing from the writing to 11 to the removal of the non-coordinated coordinate data in the written trajectory determination data will be described with reference to the flowchart shown in FIG. In the present embodiment as well, it is assumed that the area designation is performed according to the locus shown in FIG.

Now, at S1 (step 1; the same applies below).
The starting point coordinates (x₀，
y₀) Is read. Then, in S2, the coordinates [of FIG.
(X₀, Y ₀)] Corresponding to the bit map memory 111
Write 1 to the address. Writing ends in S3
And the next coordinate (x₁, Y₁) Together with the counter
Increment i (i = 1). Same as S2 in S4
This coordinate [(x in Figure 5₁, Y₁)] Write 1 in the area
Imprint Next, in S5, the coordinates (x₀, Y₀) Connection
I will When the connection check is completed, enter the coordinates in S6.
Check the end of. Enter coordinates if not finished
The processing of S3 to S5 is repeated until the end of. Therefore, i
It is incremented each time this loop passes. So
As a result, as shown in FIG.
1 is sequentially written in the address area. Specify the above area
In the example of the locus of, it is stored in the unconnected coordinate storage memory.
The coordinates are (x₀, Y₀) And (x_n, Y_n) And only two
It When the coordinate input is completed, the data of the non-coordinated coordinate is obtained in S7.
Perform removal processing.

Next, in S8, it is checked whether or not a closed loop exists. To detect the presence / absence of a closed loop, the counter i is checked, and if i ≦ 0, it is determined that there is no closed loop.
In this case, an error message is displayed in S9, and re-input of the area designation is waited for. If i> 0, it is determined that there is a closed loop, and the registration is completed.

The connection check process will be described below. Figure 7 is a coordinate, that is, attention coordinates for a checking the connection _- shows the the matrix M of _{(x i 1, y i -1} ) 3 × 3 centered at. First, eight pieces of locus determination data corresponding to coordinates other than the coordinates of interest (coordinates 1 to 8 in FIG. 7) are read from the bit map memory 111. When the reading is completed, the read data of the coordinates 1 to 8 are sequentially checked. As a result, if there is no 1 data, or if there is 1 data, or if there are 2 data, and they are adjacent to each other, they are not connected, and the coordinate of interest (x _{i -1}
, Y _{i -1} ) is stored in the uncoordinated coordinate storage memory.

In the present specification, “adjacent to each other” means that the coordinates of data 1 are adjacent to each other vertically or horizontally.

Therefore, when the first reading is performed,
The coordinate of interest is (x ₀ , y ₀ ), that is, the starting point, and only 2 points of the 3 × 3 matrix M (FIG. 7) extracted from FIG. 5 are 1, that is, 1 is written in the bit map memory 111. The coordinates (x ₀ , y ₀ ) and (x ₁ ,
There are only two points, y ₁ ). Therefore, according to the above definition of connection, the coordinate (x ₀ , y ₀ ) becomes unconnected, and this coordinate is stored in the unconnected coordinate storage memory.

Next, the data removal processing of the unconnected coordinates will be described. First, among the coordinates [in this case, two points (x ₀ , y ₀ ) and (x _n , y _n )] stored in the unconnected coordinate storage memory, the first stored coordinate (x ₀ , y ₀ ) Eight locus determination data corresponding to coordinates (coordinates 1 to 8 in FIG. 7) other than the coordinate of interest of the 3 × 3 matrix M centered at are read from the bit map memory 111.

FIG. 8 shows the locus determination data read in association with the matrix M. Coordinates of interest (x
₀ , y ₀ ) has one other coordinate with data 1 and is not connected, so the trajectory determination data of the address of the bit map memory 111 corresponding to this target coordinate is cleared, and the counter i is reset. Decrement.

Then, the locus determination corresponding to the coordinates (coordinates 1 to 8 in FIG. 7) other than the target coordinates of the 3 × 3 matrix M centered on the coordinate (x ₁ , y ₁ ) read out the second time. Eight pieces of data are read from the bit map memory 111.

FIG. 9 shows the read result. Also in this case, since the matrix M has the same shape as that in FIG. 8, the matrix M is not connected, and the locus determination data of the address of the bit map memory 111 corresponding to the coordinate of interest (x ₁ , y ₁ ) is cleared. Similarly, eight pieces of locus determination data corresponding to coordinates other than the coordinates of interest of the 3 × 3 matrix centered on the next input coordinates (x ₂ , y ₂ ) are stored in the bit map memory 111.
Read from.

FIG. 10 shows the result. Since this is also the same as in FIG. 9, the same data removal processing as above is performed. FIG. 11 shows the result of reading out the matrix corresponding to the next coordinate (x ₃ , y ₃ ). In this case, there are two coordinates having data 1, but since they are adjacent, it is determined that they are not connected, and the trajectory determination data of the address of the bit map memory 111 corresponding to the coordinate of interest (x ₃ , y ₃ ). Is cleared. Then, the next coordinate (x ₄ , y
_In the matrix M of ₄ ), since there are a plurality of coordinates of which the data is 1, check from the coordinate with the smaller number shown in FIG.

FIG. 12 shows a matrix M centered on the coordinates (x ₄ , y ₄ ). As can be seen from FIG. 12, the coordinate of interest (x ₄ , y ₄ ) has a coordinate of 1 for data and a coordinate of 3 for data of 1.
Since there are individual items, it is determined that they are connected.

Next, the coordinate with the larger x coordinate (x _{3 + 1} ,
y _{3- 1)} to a checking for. FIG. 13 shows a matrix M centered on the coordinate of interest (x _{3 +1} , y _{3 -1} ). Also in this case, since there are three coordinates of which the data is 1, it is determined to be connected.

[0038] Since the point at coordinates (x _0, y ₀₎ is ceased unconsolidated coordinates of neighboring ends of Deda removal process of unconsolidated coordinates for the coordinate (x _0, y _0). The data removal process is performed for all the coordinates stored in the non-coordinated coordinate storage memory.

FIG. 14 shows the storage state of the trajectory determination data in the bit map memory 111 which has been subjected to the data removal processing of the non-coordinated coordinates.

Next, an area switching process for reading out the locus determination data recorded in the bit map memory 111 and switching the locus determination data of the designated area in the locus to high data will be described.

FIG. 15 and FIG. 16 are detailed circuit blocks of the memory management unit 110 and the area switching unit 112, respectively.

The bit map memory 111 has a one bit word structure and has a memory capacity of one mega bit. The bit map memory 111 stores the frame synchronization signal SEL1 /
When SEL2 = 0/0, it is connected to the CPU of the system controller 100 via the address bus and the data bus. In this state, the system controller 100 can write / read data to / from the bit map memory 111. In the modes other than the area designation mode, the contents of the bit map memory 111 are all erased.

In order to generate the area switching signal, first, the mode selection signal SEL3 = 0 is set, the processing data corresponding to the contents of the data processing processing in the area is written in the register 200, and when the writing is completed, the mode selection signal SEL3.
= 1 and hold the processed data. The held processing data is output from the output terminals A, B and C. For example, if it is desired to switch the filter 107, 3 bit data [10
0] B (Binary: binary number) is written. Then,
Since A / B / C = 0/0/1 is output from the output terminal, the selector 210 for switching the filter 107
The data 1 is input only to the A input terminal of the above, and only the output of the selector 210 can be set to 1 (when the select signal A / B is 1, high data 1 is output). Each switching signal CH1, CH2, CH3 is 0,
When the normal mode or the area designation mode is selected, the processing mode outside the designated area is selected, and the switching signals CH1, CH
When either 2 or CH3 is 1, the processing mode inside the designated area is selected.

Next, waiting for the start of copying, when copying is started, SEL1 / synchronous with the line synchronizing signal LSYNC at the timing of reading the leading edge of the document.
SEL2 = 1/1. Along with this, the connection of the address of the bit map memory 111 is switched from the CPU to the X / Y address counter 201. A line sync signal LSYNC is input to the Y address counter, and a divided clock signal CLK8 obtained by dividing the clock signal CLK by 1/8 is input to the X address counter. Y address, X
Each of the addresses becomes the upper address and the lower address of the bit map memory 111. The Y address counter is reset every frame synchronization signal SEL1 = 0, and the X address counter is reset every line synchronization signal LSYNC = 0. Therefore, the Y address becomes the sub-scanning address and the X address becomes the main scanning address. In synchronization with the reading of the leading edge of the document read by the scanner, the area map data is sequentially output from the bit map memory 111 to the area switching unit 112.

When the area designation mode is not set, the area designation mode signal SEL4 = 0 is set and the area switching unit 1
All 12 output signals CH1, CH2, and CH3 are set to 0.

The locus determination data A1, A2, A3, A4 input to the discrimination block 202 are as follows, where the address of the locus determination data A0 read from the bit map memory 111 is (x _i , y _i ). become that way.

A1: (x _i , y _{i -1} ) trajectory determination data, that is, trajectory determination data of the same main scanning position (x _i ) one line before A2: The same main scanning position (x _i ) one line before Of the determination data J1 A3: (x _{i -1} , y _i ) immediately before the appearance of the data 1 of 1, i.e., the determination of the trajectory of the coordinate immediately before the same line A4: 1 of the same line (y _i ). The J1 line memories 203 and 204 immediately before the appearance of the data of
The trajectory determination data is written bit by bit in synchronism with 8, and is output bit by bit in the written order. Also,
Clear terminal CLR of built-in I / O address counter
Since the line synchronization signal LSYNC is input to
The address counter is reset for each line. That is, the timing of the output data is delayed by one line with respect to the input data. For example, the line memory 203
In the case of, the data of (x _i , y _i ) is written and the data of (x _i , y _{i -1} ) is read at the same time. Therefore, the locus determination data of the same main scanning position one line before is input to the input terminal 1.

If the locus judgment data A0 is 0, the judgment data J1 is input to the input terminal 2, the output data of the line memory 204 is fed back to the line memory 204, and the output data of the line memory 204 is input to the input terminal 2. .. That is, the line memory 204 is rewritten only when the locus determination data A0 is 0. Therefore, the discrimination data J1 immediately before the data 1 of the same main scanning position one line before appears at the input terminal 2.

The divided clock signal C is applied to the input side of the input terminal 3.
Since the latch circuit 205 synchronized with LK8 is included,
The locus determination data of the coordinate immediately before the same line is input. Since the latch circuit 206 synchronized with the change of the locus determination data A0 to 1 is provided on the input side of the input terminal 4, the judgment data J1 immediately before the change of the locus determination data A0 to 1 is input.

FIG. 20 shows a correspondence relationship between input / output data of the discrimination block 202, and FIG. 17 shows a detailed circuit of the discrimination block 202.

The discrimination block 202 has seven comparators, and each input terminal A has an input terminal 1,
The input data of 2, 3, and 4 are input to the input terminal B, and the output data of each comparator is 1, and the 5th, 6th, 7th, 9th, 10th, and 13th 4-bit data shown in FIG. ing. The output data of each comparator is 1 when A = B, and further the logical sum of all the output data is taken and output from the output terminal Q.

The discriminating data J1 is 1 if the locus discriminating data A0 is 1, and is data of the discriminating result by the discriminating block 202 if it is 0. Switching signals CH1, CH2, and CH3 output from the area switching unit 112 are AND circuits 2
According to the output data J2 of 07, that is, if the determination data J1 is 1, the processed data held in the register 200 is output, and if the determination data J1 is 0, the data of all 0 is output.

FIG. 18 shows a state in which the area switching unit 112 has performed area switching processing on the locus data representing the specified area boundaries shown in FIG. As shown in FIG. 16, the inside of the closed loop written in the bit map memory 111 is all converted to data 1, and the inside of the closed loop becomes the designated area.

[0054]

As described above, according to the present invention, the read coordinate position information, the immediately preceding coordinate position information, the main scanning area information, the previous line coordinate position information, and the line area information are read during the reading operation. On the basis of the above, the area discriminating means discriminates whether or not the coordinate position corresponding to the read coordinate position information is within the designated area divided by the trajectory. Since it is possible to determine whether or not the read coordinate position is within the designated area without rewriting the stored coordinate position information, the time required for exchanging the coordinate position information with the trajectory information storage means is saved, and the area determination is performed. The processing time can be shortened.

According to the second aspect of the invention, when the area discriminating means discriminates the coordinate position information of the first coordinate position, the immediately preceding coordinate position information is used as the coordinate position information representing the outside of the designated area. Can be prevented from becoming indistinguishable.

[Brief description of drawings]

FIG. 1 is a control block diagram of a digital copying machine according to an embodiment of the present invention.

FIG. 2 is a perspective view of a document placing board.

FIG. 3 is an explanatory diagram showing an example of a locus in which an area is designated.

FIG. 4 is an explanatory diagram showing a state in which the locus determination data of the designated area shown in FIG. 3 is written in a bit map memory by a conventional method.

FIG. 5 is an explanatory diagram showing coordinates of trajectory determination data stored in a bit map memory.

FIG. 6 is a flow chart of area designation processing according to an embodiment of the present invention.

FIG. 7 is an explanatory diagram showing a matrix composed of a target coordinate and its surrounding coordinates.

FIG. 8 is an explanatory diagram showing a matrix whose center is a start point coordinate.

FIG. 9 is an explanatory diagram showing a matrix centered on the coordinates read out for the second time.

FIG. 10 is an explanatory diagram showing a matrix centered on the coordinates read out for the third time.

FIG. 11 is an explanatory diagram showing a matrix centered on the coordinates read out for the fourth time.

FIG. 12 is an explanatory diagram showing a matrix centered on the coordinates read out for the fifth time.

FIG. 13 is an explanatory diagram showing a matrix centered on the coordinate to the right of the coordinate read out for the fifth time.

FIG. 14 is an explanatory diagram showing a storage state of trajectory determination data subjected to data removal processing of unconnected coordinates.

FIG. 15 is a detailed circuit diagram of a memory management unit.

FIG. 16 is a detailed circuit diagram of an area switching unit.

FIG. 17 is a detailed circuit diagram of a discrimination block.

FIG. 18 is an explanatory diagram showing a storage state of trajectory determination data obtained by performing area switching processing on trajectory data.

FIG. 19 is a diagram illustrating a color conversion formula.

FIG. 20 is a chart showing the relationship between input and output data of a discrimination block.

FIG. 21 is an explanatory diagram showing a state of a bit map memory in which data conversion processing of a designated area in a locus is performed.

[Explanation of symbols]

 100 System Controller 101 Operation Board 102 Document Placement Board 103 Timing Circuit 104 Image Scanner 105 Density Converter 106 Color Correction / UCR 107 107 Filter 108 Editing Unit 109 Laser Printer 110 Memory Management Unit 111 Bitmap Memory 112 Area Switching Unit 202 Discrimination Block

Claims (2)

[Claims] 1. A document mounting board for detecting a coordinate position corresponding to a predetermined position of a document by pressing, and coordinate position information of a trajectory traced by tracing a non-rectangular boundary of a designated area on the document mounting board. In a document area designating apparatus having a locus information storing means for storing the locus information, the coordinate position information stored in the locus information storing means is sequentially read line by line in the main scanning direction when the area designating mode is selected. When the coordinate position information, the immediately preceding coordinate position information that is the previously read coordinate position information, and the coordinate position information that represents the locus are read, the coordinate position information that represents the next locus in the main scanning direction is displayed. The main scanning area information in which the coordinate position information indicating the locus is maintained as it is until the reading is performed, and the coordinate position information of the same main scanning direction coordinate position one line before. When the previous line coordinate position information and the coordinate position information indicating the locus are read, the locus is read in the line direction and at the same main scanning direction coordinate position until the coordinate position information indicating the next locus is read. Whether the coordinate position corresponding to the read coordinate position information is within the designated region divided by the trajectory based on the line region information in which the coordinate position information indicating A manuscript area designating apparatus having area discrimination means for discriminating. 2. The original document according to claim 1, wherein when the area discriminating means discriminates the coordinate position information of the first coordinate position, the immediately preceding coordinate position information is the coordinate position information indicating the outside of the designated area. Area designation device.