JPH06164892A - Copying machine equipped with editing function - Google Patents

Abstract

PURPOSE:To easily correct a mechanic error between the reference point of a coordinate inputting device and the reference point of a platen glass by storing the coordinates of the vertexes of a polygon indicating an editing area in a storage device by a relative coordinate with the reference point of the coordinate inputting device as a reference, and changing the coordinate of the reference Point. CONSTITUTION:This device is equipped with an editing function which designates the editing area by a coordinate inputting device 14 before the copy of an original, and operates a prescribed picture processing to a picture corresponding to the editing area at the time of the copy of the original. Then, the storage device of a CPU 13 stores the coordinates of the vertexes of the polygon indicating the editing area by the relative coordinate using the reference point of the coordinate inputting device 14 as the reference. When a relative relation between the reference point of the coordinate inputting device 14 and the reference point of the platen glass goes wrong, the coordinate of the reference point of the coordinate inputting device 14 is changed by the operation of a scanning panel 15. Thus, the coordinates of the vertexes of the polygon indicating the editing area can be simultaneously changed, and the error of the position of the coordinate inputting device 14 can be corrected.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention specifies an editing area for an original image and extracts the original image in the editing area.
The present invention relates to a copying machine having an editing function capable of performing image processing such as deletion.

[0002]

2. Description of the Related Art In a copying machine having an editing function, a user designates a desired area in a document image as an editing area and extracts only the image in this editing area.
It is possible to delete and copy. A coordinate input device generally called a digitizer is used as a device for designating an editing area. There are various types of digitizers such as an electrostatic type, an electromagnetic type, a matrix electrode type, and a direct current resistance type, but in any case, the digitizer detects the coordinates of a position designated by a user with a finger or a pen. Generally, the digitizer has a rectangular input surface, and a specified coordinate is detected with a specific position on the input surface, for example, an upper right corner as a reference point.

When an edit area is designated and only that portion is extracted for copying, the document is first placed on the digitizer and the corner of the document is set at the reference point of the digitizer, for example, the upper right corner. Specify the editing area as a rectangle or polygon while looking at the image of the original in the abutted state. The coordinates of the vertices of a rectangle or polygon representing the edit area are stored in the storage device. Next, the original is placed downward on the platen glass of the copying machine, and copying is performed with the corner of the original abutting the reference point of the platen glass, for example, the upper left corner. During this copying operation, the edit area is calculated based on the coordinates stored in the storage device. The coordinates of the editing area in the sub-scanning direction are reversed so as to correspond to the position of the image of the original document on the platen glass, and only the image existing in this editing area is formed on the photoconductor and is developed. Transcribed on.

[0004]

When the reference point of the digitizer and the reference point of the platen glass are coincident with each other, the area specified by the user is accurately edited. Due to mechanical errors such as mounting accuracy,
Since there may be a gap between the reference point of the digitizer and the reference point of the platen glass, an area different from the area intended by the user may be edited.

Therefore, in the conventional copying machine having the editing function, the scanning start position of the document scanning device in the image input device is moved to relatively move the reference point of the platen glass to thereby move the reference point of the digitizer. And the reference point of the platen glass are matched. For example, when the scanning carriage of the document scanning device is driven by a pulse motor, the point where a certain number of drive pulses are supplied after the scanning carriage has crossed the home position sensor is regarded as the reference point of the platen glass and the original document is considered. It controls the operation of the scanning device. However, controlling the operation of the document scanning device for adjusting the reference point may affect the operation of other circuits, which is not preferable. Further, the control of the scanning start position can only adjust the position in the sub-scanning direction. Further, in the conventional reference point adjusting device for the digitizer, some adjustment values are preset and these adjustment values are switched by the switch on the digitizer side. However, there was a problem that the operation was troublesome.

Therefore, an object of the present invention is to make it possible to easily correct a mechanical error between the reference point of the digitizer and the reference point of the platen glass.

[0007]

In order to achieve the above object, the present invention specifies an editing area by a coordinate input device prior to copying an original, and when the original is copied, the editing area is specified in the image of the original. In a copying machine equipped with an editing function that performs predetermined image processing on an image corresponding to an editing area,
A storage device that stores the coordinates of the vertices of a polygon representing the editing area in relative coordinates with respect to a reference point of the coordinate input device; and a means for changing the coordinates of the reference point. To do.

[0008]

In the present invention, the coordinates of the vertices of the polygon representing the editing area are stored in relative coordinates with reference to the reference point of the coordinate input device. If the reference point of the coordinate input device and the reference point of the platen glass are out of alignment, changing the coordinates of the reference point of the coordinate input device will simultaneously change the coordinates of the vertices of the polygon that represents the editing area. The position error of the coordinate input device is corrected.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The features of the present invention will be specifically described below based on embodiments with reference to the drawings.

FIG. 1 shows a block diagram of an embodiment of a copying machine having an editing function according to the present invention. An image signal from an image input device 1 is converted into a digital signal by an A / D converter 2. A halftone image such as a photographic original is supplied to the image processing circuit 5 via the dither processing circuit 3, and a binary image such as a character original is supplied to the image processing circuit 5 via the binarizing circuit 4. The image processing circuit 5 is connected to a RAM (random access memory) table 6 in which function codes indicating the types of processing such as deletion, extraction, color conversion, and back shading are stored in advance.
Each of the above processes is performed according to the function code read from the RAM table 6. Reference numeral 7 is a halftone generating circuit for generating a halftone pattern when back halftone is applied. The image signal processed by the image processing circuit 5 is supplied to an image output device 8 such as a laser printer and output as an image. That is, copying is performed with the image of the original document edited.

Reference numeral 11 is a bit map memory for storing an editing area. This bitmap memory 11
A drawing device 10 for writing data to the bitmap memory 11 at high speed is connected to.

The drawing device 10 draws a straight line on the bitmap memory 11 and fills an editing area at high speed by externally supplying coordinate data, a type of processing, and the like. The filling of the edit area means setting the bit of the address corresponding to the edit area of the bitmap memory 11 to a specific state, for example, "1".

A CPU (Central Processing Unit) 13 is connected to the drawing apparatus 10 via a gate 12. The gate 12 is closed while the image input device 1 is scanning, and is open during other periods.

The CPU 13 writes the function code into the RAM table 6 and controls the drawing device 10, and the RAM based on the instruction from the digitizer 14.
The drawing device 10 is instructed to rewrite the contents of the table 6 and which region of the bit map memory 11 should be filled. The output of the RAM table 6 is supplied to the image processing circuit 5. Further, the CPU 13 is connected to an operation panel 15 including a copy start button for causing the copying machine to perform a copy operation, a copy number setting button (neither is shown), a correction button described later, and the like.

The above-mentioned image input device 1 is a document (not shown) placed on the platen glass 1a as shown in FIG.
The light source 1b to irradiate the reflected light from the document with the mirror 1c,
The light is reflected by 1d and 1e, and an image is formed on the image sensor 1g by the lens 1f, and an image signal is obtained from the image sensor 1g. The light source 1b and the mirror 1c are attached to the full-speed carriage 1h, and the mirrors 1d and 1e are attached to the half-speed carriage 1i. Then, the full-speed carriage 1h is moved in the arrow direction along the lower surface of the platen glass 1a, and the half-speed carriage 1i is moved in the same direction at half the speed of the full-speed carriage 1h.
I am trying to read the image of the original.

The digitizer 14 has a flat surface having the same size as the platen glass 1a, and obtains the position pressed by a pen or the like as coordinate data. For example, the platen glass of the image input apparatus 1 is used. The platen cover 1j is provided on the upper surface of the platen cover 1j to open and close it. As shown in FIG. 3, the digitizer 14 is provided with a region designation area E _R for designating a region to be edited and a function designation area E _F for designating the type of processing. In the function designation area E _F, there are a plurality of windows 1 corresponding to the types of processing.
4a to 14f are formed. For example, each window 14
a to 14f correspond to "polygon designation", "rectangle designation", "area setting", "delete", "extraction", and "end". When the area designation area E _R is pressed,
The CPU 13 processes the coordinate data as the area information, and processes the coordinate data as the function information when any of the windows 14a to 14f of the function designation area E _F is pressed.

Next, regarding the editing operation in the copying machine having the editing function, the flow chart of FIG. 4 will be described by taking as an example the case where the edit area is designated by a polygon and the extraction processing is designated for this edit area. It will be described with reference to FIG.

First, a document D to be edited (indicated by a broken line) is placed on the area designation area E _R (see FIG. 3) of the digitizer 14 with the image surface facing upward, and the upper right corner of the document is set to the digitizer 14. It is made to coincide with the upper right corner which is the reference point P0.
Next, the window portion 14a corresponding to the "polygon designation" in the function designation area E _F of the digitizer 14 is pressed. As a result, the vertex number n is initialized to 1 (step 10
1). After this, the first vertex P1 of the polygon corresponding to the editing area is designated and the coordinates (x ₁ , y ₁ ) are input (step 102). Coordinates (x ₁ , y ₁ ) of this first vertex P1
Is the shape of the difference from the coordinate (x ₀ , y ₀ ) of the reference point P0 (x ₁
−x ₀ , y ₁ −y ₀ ), which is stored as relative coordinate data in a memory incorporated in the CPU 13, for example.
(Steps 103 and 104). The initial value of the coordinates of the reference point P0 is (0,0).

Next, the coordinates (x ₂ , y ₂ ) of the second vertex P2
Is input, the difference (x ₂ −x ₁ , y ₂ ) from the coordinates of the immediately previous vertex, in this case, the coordinates (x ₁ , y ₁ ) of the first vertex P1.
-Y ₁ ) is obtained by calculation by the CPU 13, and the value of this difference is stored in the memory as relative coordinate data (steps 105 and 106). The difference between the coordinate of the first vertex P1 and the coordinate P0 of the reference point is stored, and
Regarding the coordinates after the vertex P2, the difference from the coordinates with the immediately preceding vertex is stored in the digitizer 1 as described later.
This is because it is easy to correct the coordinates of the vertices of the editing area when the reference points of No. 4 are corrected. Further, when the difference is stored, it is possible to reduce the amount of data of the coordinates of the vertices and reduce the memory capacity required to store the coordinate data.

Similarly, the coordinate data after the coordinates of the third vertex P3 are sequentially stored in the memory as relative coordinate data each time the vertex number n increases (steps 102, 1).
03, 105, 106, 107). This process is repeated until the area setting button is pressed.

When the vertex P5 is the last vertex, the coordinates of the vertex P5 are input, and then the window portion 14c corresponding to "area setting" is pressed, whereby the polygonal vertex representing the editing area is determined. Further, for example, by pressing the window portion 14e corresponding to "extraction" (step 108), the type of editing, that is, the function is determined and stored in the memory (step 109).

Finally, by pressing the window portion 14f corresponding to "end" (step 110), the coordinates of the reference point P0 expressed in absolute coordinates and the vertices P1 expressed in relative coordinates of the editing area are calculated. The coordinates of P5 and the data of the editing function are stored in the memory in the structure as shown in Table 1, for example. The editing functions 00, 01, 10, 11
Corresponds to, for example, deletion, extraction, color conversion, back shading.

[0023]

[Table 1] Next, the platen cover 1 provided on the image input device 1
After opening j, the original is placed on the platen glass 1a of the image input apparatus 1 with the image surface facing downward, and the upper left corner of the original is aligned with the upper left corner which is the reference point of the platen glass 1a, and then the platen cover 1j. Close.

By operating a copy start switch (not shown) provided on the operation panel 15 of the image processing apparatus, first, the coordinates of the reference point and the coordinates of each vertex stored in the built-in memory of the CPU 13 are first described. The data of the editing function is transferred to the drawing device 10 via the gate 12, and the drawing device 10 fills the bitmap memory 11 corresponding to the editing area based on these data. That is, first, each vertex P1, P2, P3, P4, P
The straight lines L ₁₂ , L ₂₃ , L ₃₄ , L ₄₅ and L ₅₁ connecting 5, 5 are obtained, and then these straight lines L ₁₂ , L ₂₃ , L ₃₄ ,
1 is written in the area in the bitmap memory 11 corresponding to the area surrounded by L ₄₅ and L ₅₁ .

At this time, the data of the type of processing designated by the digitizer 14 is also stored in the bitmap memory 11. This area corresponds to the area to be processed in the image processing circuit 5.

Next, scanning for reading the image of the original is performed by the image input device 1 shown in FIG. In the figure, the arrow indicates sub-scanning. The drawing device 10 is operated in synchronization with the synchronization signal S _SYNC generated at the time of reading this image, the bit pattern in the bitmap memory 11 is read in bit units, and the serial-parallel conversion circuit 9 causes, for example, a 3-bit address signal. Is supplied to the RAM table 6.

In the RAM table 6, as described above, the correspondence relationship between the function number and the function code representing the above-mentioned processing type is written in advance by the CPU 13. Therefore, the function code is read from the RAM table 6 in bit units corresponding to the filled area of the bitmap memory 11.

In the image processing circuit 5, processing corresponding to the function code from the RAM table 6 is performed. When the type of processing is extraction, for example, the image signal of only the portion corresponding to the editing area of the image of the document passes. The image signal after the image processing is supplied to the image output device 8, and an output image in which the image of the portion corresponding to the editing area is extracted is obtained.

Next, the operation of correcting the reference point of the digitizer in the copying machine having the above-mentioned editing function will be described.

When the edit area designated by the digitizer 14 and the area actually extracted in the output image are different, the reference point of the digitizer 14 and the reference point of the platen glass 1a do not match. . In order to correct this mismatch of reference points, in the present embodiment,
As shown in FIG. 5, on the operation panel 15 of the copying machine, correction buttons 16a to 16 for instructing the correction direction and amount.
d and a correction value display unit 16 for displaying the correction amount
e, 16f are provided. The correction button 16a is for X-axis positive direction correction, the correction button 16b is for X-axis negative direction correction,
The correction button 16c is for Y-axis positive direction correction, and the correction button 16c
d is for Y-axis negative direction correction. In addition, the correction value display unit 16
e is for displaying the X coordinate correction value, and the correction value display portion 16f is for displaying the Y coordinate correction value.

For example, when the correction button 16a is pressed once (steps 201 and 202 in FIG. 6), the X coordinate of the reference point stored in the memory is moved in the positive direction by the amount Δx corresponding to 0.1 mm on the original. (Step 203), the changed value is stored in the memory as the coordinates of the new reference point (step 207), and "+0.1" is displayed on the correction value display section 16e, and the correction value is displayed. "0.0" is displayed on the section 16f (step 208). For example, if the actual extraction area in the output image is 1 mm to the right of the editing area specified by the user, it means that the reference point of the digitizer is relatively 1 mm to the right. When the correction button 16a for X-axis positive direction correction is pressed 10 times from the state, the X coordinate of the reference point becomes (x
₀ + 10Δx), and the reference point moves to the positive side, that is, the left side on the document, and the specified edit area and the actual extraction area completely match. At this time, "+1.0" is displayed on the correction value display portion 16e. The same applies to the X-axis negative direction correction, the Y-axis positive direction correction, and the Y-axis negative direction correction (steps 204, 205, 206), and the coordinates of the corrected reference point are generally (x ₀ + mΔx, y ₀ + nΔy). expressed. However, m and n are integers, and Δy is the correction button 16
This is the amount of change in the Y-axis direction when c or 16d is pressed once.

After the coordinates of the reference points are corrected as described above, when the image is edited and the copying operation is performed, the bitmap memory 11 is filled based on the corrected coordinates of the reference points. At this time, the coordinates of each vertex of the polygon that represents the editing area are stored in the memory in the form of relative coordinates based on the coordinates of the reference point, so simply changing the coordinates of the reference point The coordinates can be changed at the same time.

[0033]

As described above, in the present invention, the reference point of the digitizer can be easily corrected,
The mechanical error of the digitizer can be absorbed.

[Brief description of drawings]

FIG. 1 is a block diagram of an embodiment of a copying machine having an editing function according to the present invention.

FIG. 2 is a schematic sectional view of an image input device used in the copying machine shown in FIG.

FIG. 3 is a front view showing an example of a digitizer used for designating an editing area.

FIG. 4 is a flowchart showing a flow of processing when an area is designated.

FIG. 5 is a front view showing an example of a correction device for correcting a reference point.

FIG. 6 is a flowchart illustrating a process of correcting a reference point.

[Explanation of symbols]

1: Image input device, 2: A / D converter, 3: Dither processing circuit, 4: Binarization circuit, 5: Image processing circuit, 6: RAM
Table, 7: halftone generation circuit, 8: image output device, 9: serial-parallel conversion circuit, 10: drawing device, 11: bitmap memory, 12: gate, 13: CPU, 14: digitizer, 14a to 14f: window part. , 15: Panel, 16a-1
6d: correction button, 16e, 16f: correction value display section, E
_R : Area designation area, E _F : Function designation area, L ₁₂ , L
₂₃ , L ₃₄ , L ₄₅ , L ₅₁ : straight line P0: reference point, P1 to P5: first to fifth vertices

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification code Office reference number FI technical display location // G03G 15/00 302

Claims (1)

[Claims] 1. An editing area is designated by a coordinate input device prior to copying an original, and predetermined image processing is performed on an image corresponding to the editing area in an image of the original when copying the original. In a copying machine having an editing function as described above, a storage device that stores the coordinates of the vertices of a polygon representing the editing area in relative coordinates with respect to the reference point of the coordinate input device, and the coordinates of the reference point A copying machine having an editing function, characterized in that it is provided with a changing means.