JPS63121359A - Picture processor - Google Patents

Abstract

PURPOSE:To form a picture in an appropriate position on a recording member by image-forming an original picture based on a read picture signal and providing a means for designating the forming position of the picture on the recording member. CONSTITUTION:The original picture is read in a CCD read part 301 and temporarily stored in a shift memory part 303 through a shading correction part 302. A variable power/shift processing part 304 changes a write clock in a memory, a read clock from the memory and read timing and executes variable power and shift processing. The picture signal outputted form the memory part 303 is processed in a density processing part 305 and a trimming processing part 306, and is transmitted to a printer. An original position detecting part 307 detects an original position, and the size of the recording member which is set in the printer is given to a reader through a connector JR1. A CPU308 controls the scan on the recording member in accordance with the recording member and the picture, and it can form the picture in a shift position which an operation part 310 designates.

Description

DETAILED DESCRIPTION OF THE INVENTION (Technical Field) The present invention relates to an image processing apparatus such as a copying machine, and more particularly to an image processing apparatus equipped with an image editing function.

(Prior art) In conventional analog copiers, by arbitrarily changing the document scanning timing and paper conveyance timing,
Although the image was moved in the sub-scanning direction, it was not easy to move the image in the main scanning direction.

On the other hand, with digital copying machines, it has become possible to compensate for this drawback and move the image to any position on the paper in both the main scanning and sub-scanning directions, but a moving function has been developed that takes into account operability. It is desirable to provide an automation mode for

(Objective) The present invention aims to improve the operability of the movement function, and aims to provide an image processing device equipped with a practical automated movement function.

〔Example〕

The present invention will be explained below based on preferred embodiments.

FIG. 1 shows an external view of a document reading device used in an image processing apparatus to which the present invention is applied, and FIG. 2 shows an internal configuration diagram of the document reading device shown in FIG.

The document is placed face down on document table glass 3, and is pressed onto the glass by document cover 4. The document glass side of the document cover 4 is mirror-finished for document detection, which will be described later. The document is illuminated by a fluorescent lamp 2, and the reflected light is focused via a mirror 5.7 and a lens 6 onto the surface of a CCDI having a plurality of light receiving elements on one line.

Mirrors 7 and 5 move at a relative speed of 2:1 in the sub-scanning direction indicated by the arrow in the figure. These optical systems are moved at a constant speed by a DC servo motor while applying PLL.

The maximum document size that can be processed is A3 size and the resolution is 40.
Since it is 0 dot/inch, 1 bit of CCD is required.

Therefore, this device uses a 5000-bit CCD. Also, main scanning synchronization is therefore 180mm/s for the optical system at 1x magnification.
It moves in the sub-scanning direction at a speed of ea.

In this way, the original image is read and scanned line by line, and an image signal representing the image is supplied bit serially to a printer to be described later.

FIG. 3 shows a sectional view of the printer. The image signal processed bit-serially by the document reading device shown in FIG. 1 is manually inputted to the laser scanning optical system unit 25. This unit 2
5 consists of a semiconductor laser collimator lens, a rotating polygon mirror, an Fθ lens, and a tilt correction optical system. Hara'fI4
A laser beam modulated according to an image signal from a reading device is irradiated via a collimator lens to a polyhedral mirror rotating at high speed, and the reflected light is incident on a photoreceptor 8 and scanned.

Process components that enable image formation on the photoreceptor 8 include a pre-static eliminator 9, a pre-static eliminator lamp 10, and a charger 1.
1. Secondary charger 12) Front exposure lamp 13, developer 14
, paper feed cassette 15, paper feed roller 16, paper feed guide 17
, registration roller 18, transfer charger 19, separation roller 2
0, a conveyance guide 21, a fixing device 22) and a tray 23 are arranged. Photoreceptor 8 and conveyance system speed is 180 mm/se
It is c. Printer B is a so-called laser printer that forms an electrostatic latent image on a uniformly charged photoreceptor 8 by scanning laser light, develops this latent image, and transfers it onto a recording material. I'll omit the explanation.

The image processing device in this example has intelligence such as image editing, variable image magnification in 1% increments in the range of 0.35x to 4.0x, cropping to extract only an image of a designated area, and the ability to perform cropping to extract only an image from a specified area, and the entire document. Alternatively, it has a function of moving the trimmed image to an arbitrary position on the paper, a function of detecting the position and size of the document placed on the document table, etc.

FIG. 4 shows a detailed view of the operation section provided in the document reading device shown in FIG. 1, and will be described below. Reference numeral 101 is a return key in the standard code of the processing format, 102 is a stop key for stopping processing, 103 is a start key for starting processing, 10
4 is a numeric keypad group for instructing the number of copies, 105 is a copy number display area, 106 is a density display area, 107 is a density up/down key, 108 is a paper size selection key, and each time you press this key, the printer information is displayed on the display 109. Either the upper/lower paper feed tray or automatic paper selection will be displayed sequentially, and display 11
Its size is displayed at 0. 111 increases magnification/
113 is a key to repeatedly select automatic magnification and equal magnification, 112 is a magnification display section, 114 is a key to select a movement mode, and the selected mode is displayed in display 115. Consisting of LEDs a to i, all lights are off when the power is turned on, and the mode does not move the image, and each time the key 114 is pressed, e → a → d →
The lights turn on one by one in the order of g→h→i→f→C→b to change the mode of Mu Qin, which will be described later, and press the key 114 again.
When you press , all lights go out again, and the above display repeats every time you press the key.

FIG. 5 shows a system block diagram of the first illustrated document reading device.

The CCD reading section 301 includes a CCD, a clock driver for the CCD, and a signal amplifier from the COD.

It has a built-in A/D converter that converts it A/D. Image data converted into a 6-bit digital signal is output from the CCD reading section 301 and input to the shading correction section 302 .

After the shading correction unit 302 detects and corrects the shading amount of the light source, lens, etc., the image signal is temporarily stored in the shift memory unit 303. 30
3 has a shift memory for two lines, and when writing the Nth line image data to the first memory, the second shift memory
A part of the shift memory that reads the N-1th line image data from the memory also has a write address counter for writing image data to the shift memory, a read address counter for reading it, and addresses from these two counters. There is an address selector circuit for switching signals. The detailed configuration is shown in FIG.

Further, the scaling/movement processing unit 304 performs scaling and movement in the main scanning direction by changing the clock at which the image signal is written to the shift memory, the clock at which the image signal is read from the shift memory, and the timing at which the image signal is read.

The image signal output from the shift memory unit 303 is input to the density processing unit 305, where it is subjected to binarization processing and dither processing to become a binary code, and is output to the trimming processing unit 306. The trimming processing unit 306 forcibly processes an arbitrary section of the main scanning line image data into "0" or "1" to enable trimming and masking of the image.

The binary code output from the density processing section 305 is also input to the document position detection section 307 . Here, the position coordinates of the document on the document table glass are detected using a binary code.

The CPU section 308 includes a CPU, ROM, and RAM.

It is composed of a timer circuit and 10 interfaces, controls the operating section 310, controls the reader according to settings from the operator, and also controls the printer through serial communication.

311 is a DC servo motor driver, and the CPU section 30B prints and sets speed data according to the magnification. 3!2 is a fluorescent lamp driver, 0N10FF of fluorescent lamp.
313 and 314 are position sensors for the CPU unit 308 to know the position of the optical system. It is connected to the printer via connector JRI and printer connector JPI, and image data communication, serial communication such as commands, and necessary control signals are exchanged. Also,
As a result, the size signal of the recording material set in the printer is supplied to the document reading device.

A clock generator 309 generates a CCD signal transfer lock, a shift memory read/write clock, etc. in synchronization with a horizontal synchronization signal BD that is synchronized with the recording operation of each line from the printer.

FIG. 6 shows a circuit diagram related to the shift memory section 303.

The write address counter 904 is an address counter when writing data to the shift memory 907, and the read address counter 905 is an address counter when reading data from the shift memory 907. The address selector 906 sends commands from the CPU section 308 to the I10 port 90.
1 and selects either the address signal of the write address counter 904 or the address signal of the read address counter 905 to address the shift memory.

The I10 registers 902 and 903 are registers used by the 020 unit 308 to give preset values to the write address counter 904 and read address counter 905, respectively.

Both the write address counter 904 and the read address counter 905 are down counters, and the WST and RST signals that command the start of counting operations are input to each, and the write clock WCLK to the shift memory and the read clock RCLK from the shift memory are input. is input.

915.916 is an exclusive OR gate for determining the image area, OF is a signal that controls it, and when it is 1, the ST counter 912. Mask the area determined by the EN counter 913,
The area outside the frame is set as the output image, the area inside the 0 time frame is set as the output image, and the area outside the frame is masked.

910 is output from the shift memory and sent to the density processing section 90.
917 is an AND gate that controls the output of the image data that has been converted into a binary signal after passing through 8, and 917 is an AND gate that determines whether the masked portion described above is output as white or black; BB controls it. The signal outputs the time of 1 and the time and date of 0.

911 is an OR gate that outputs the image output from gates 910 and 917 as VIDEO; 909 is an exclusive OR gate that controls black and white inversion of image data; IN is a signal that controls it; when it is 1, the image is as original;
When it is 0, it is inverted.

Each signal is output by the CPU according to the mode specified by the operator.

Since the ST counter 912 and the EN counter 913 each output an image only to a predetermined area, (7) START
BiT C0UNTER and BiT C0UN
TEItl? , to which the CPU presets count data for the gates via Ilo.

The flip-flop 914 is set when the ST counter 912 counts up, and is reset when the EN counter 913 counts up.

FIG. 7 shows its operation.

FIG. 8 shows the configuration of the document position detection section 307 that detects the coordinates. Further, FIG. 9 shows the state of the original placed on the original table.

The main scanning counter 851 is a down counter and represents the scanning position in one main scanning line. This counter 8
51 is a horizontal synchronization signal HSY which is a synchronization signal for each line.
It is set to the maximum value in the main scanning direction (X direction) by NC, and 1
A countdown is performed each time the image data clock CLK for each pixel is input. The sub-scanning counter 852 is an up counter and is reset to "0" at the rising edge of VSYNC (image leading edge signal) indicating the image section of one screen.
It is counted up by the YNC signal and represents the scanning position in the sub-scanning direction.

Image data VI that is binarized by pre-scanning before reading the original
DEO is input to the shift register 801 in 8-bit units. When the 8-bit input is completed, the gate circuit 802
checks whether all 8-bit data is a white image,
If YES, 1 is output to the signal line 803. When the first 8-bit white appears after scanning the original, F/F 80
4 is set. This F/F is reset in advance by VSYNC. After that, the setting remains until the next VSYNC comes. When the F/F 804 is set, the main scanning counter 851 at that time is stored in the latch F/F 805.
The value of is loaded.

This becomes the xI coordinate value. Further, the value of the sub-scanning counter 850 at that time is loaded into the latch 806, and this becomes the Y coordinate value. Therefore, Pl(X+, Y+) can be found.

Also, each time 1 is output to the signal 803, the main scanning counter 85
Load the value from 1 into latch 807. Once the value from the main scan counter when the first 8-bit white appears is loaded into latch 807, latch 810 (which is VSY
A comparator 809 compares the data with the data (set to the maximum value in the X direction at the time of NC). If the data in latch 807 is smaller, the data in latch 807 is loaded into latch 810.

Also, at this time, the value of the sub-scanning counter is loaded into the latch 811. In this operation, the next 8 bits are transferred to shift register 80.
It is processed until it reaches 1. If the data of the latch 80 and the latch 810 are applied to the entire image area in this way, the minimum value of the document area in the X direction remains in the latch 810, and the Y
The coordinates of the direction will remain in latch 811. Since the main scanning counter 851 is a down counter, the coordinate corresponding to the minimum value in the X direction represents the farthest coordinate from the reference point SP of the document table in the main scanning direction. This is P.

(Xs, Ys).

F/F812 is an F/F that is set when 8-bit white appears for the first time in each main scanning line, and the horizontal synchronization signal HSY is set.
It is reset by NC and the first 8 bits are set to white and held until the next HSYNC. At the time when the F/F 812 is set, the value of the main scanning counter corresponding to the position of the first white signal appearing in one line is set in the latch 813. Then, a latch 815 and a comparator 816 compare the magnitude. The minimum value "O" in the X direction is set in the latch 815 at the time VSYNC occurs. If latch 81
If the data in latch 813 is less than or equal to the data in latch 813, signal 817 becomes active and latch 813
data is loaded into latch 815. This action is H
This is done between SYNC and HSYNC.

When the above comparison operation is performed for the entire image area, the latch 81
5 remains the maximum value of the document coordinates in the X direction, that is, the X coordinate of the white signal of the point closest to the scanning start point in the main scanning direction. This is X2. Also, when signal line 817 is output, the value from the sub-scan is loaded into latch 818.

This becomes Y2 and the Pz (X2, Y2) coordinate is obtained.

Each time 8-bit white appears in the entire image area, the latches 819 and 820 are loaded with the main scanning counter value and sub-scanning counter value at that time.

Therefore, when the document pre-scanning is completed, the count value at the time when 8-bit white appears last remains on the counter. This is P4 (X4°Y4).

The above eight latches (806, 811, 82o, at8
, 805, 810, 815, 819) are connected to the pass line BUS of the 020 unit 308 in FIG. 5, and the 020 unit 308 reads this data at the end of the previous scan.

FIG. 9(a) shows four corners PI, P2. P3. This shows how the coordinates of P4 are detected. In reality, it is not placed diagonally like this,
As shown in FIG. 9(b), since it is placed parallel to or against the side of the document table OP, the coordinates X2, Xs, Yr,
It is practical to adopt Y4.

Further, as shown in FIG. 9(b), the size of the original ORG is given by the following formula: X3-X2, DY=Y4-Y+.

The interface signal timing with the printer will be explained with reference to FIGS. 10 and 11.

The BEAM-DETECT signal BD is used to synchronize the rotation of the polygon scanner of the printer when connected to the printer, and corresponds to the leading edge signal of each main scanning line.

VIDEO is an image line signal, and 4,678 pixels are output per line, each having a width of about 56 ns. 'V I D
EO is output in synchronization with the BD when connected to a printer.

VIDEOENABLE is a section signal in which 4678 pieces of image data are output, and is output in synchronization with BD.

VSYNC is a signal indicating the section of the drawing line in the sub-scanning direction.

The PRINT REQUEST signal is a signal indicating that the printer is ready to feed paper. In response, the original reading device issues a paper feeding command using the PRINT signal, and then after a time T1 in which the magnification, trimming area, and amount of work are taken into account, VSY is output.
Outputs V IDEO along with NC.

OHP and VTOP are input signals from fifth sensors 313 and 314, respectively, which indicate the position of the optical system of the document reading device.

BACK and FORWA RD are CPU section 30 in Figure 5.
8 to the optical system drive motor driver 311 for controlling backward movement and forward movement.

In FIG. 11, s, DATA, S, CLK.

CBUSY and 5BUSY are signal lines for communication between the document reading device and the printer. S.

DATA, S, and CLK are all 8-bit serial data and a clock, and all are bidirectional lines. C.B.U.
SY is output when the document reading device outputs data and a clock, and 5BUSY is output when the printer outputs data and a clock.

An example of the content communicated serially is a copy start or copy stop command from the document reading device to the printer as shown in the timing chart in FIG.

The principle of image movement will be explained using FIGS. 12 and 13.

The sub-scanning direction is realized by changing the original image line scanning and VSYNC output timing to the printer, as shown in FIG. When the optical system reaches the position Δ with respect to the original, output VIDEO with VSYNC.■
As shown in the figure, an output that does not shift 8 times is obtained, and when the optical system reaches the position Δ, if VSYNC is output together with VIDEO, an output that moves backward as shown in ■ is obtained, and the optical system reaches the position Δ. If you output VSYNC and VIDEO at this time, you will get an output that moves forward as shown in ■.

Regarding the main scanning direction, as shown in FIG. 13, this is done by relatively changing the down count start address given to the write address counter 904 and read address counter 905 via the Z10 registers 902 and 9.03 in FIG. .

For example, write start address W to shift memory 90
If the read start address for ADR is RADRI, VIDEOENAB is output during main scanning as shown in Figure 13 (■).
LE&: Image data X corresponding to address WADR
It can be seen that 0 is moving to the right. Furthermore, if the read start address is RADR2, data X corresponding to the shift memory address φ is also V as shown in FIG.
It can be seen that it is moving to the left with respect to IDEOENABLE. The effective image section signal shown in FIG. 13 is the ST counter 912, EN counter 913, and F counter in FIG.
/F914 Gate 915, 916, 917, 910.9
This is a trimming section signal consisting of 11, and is necessary in order to make a white signal for the invalid image line outside the area between address φ and WADR in the shift memory of FIG.

FIG. 14 shows a conceptual diagram of an example of editing processing.

FIG. 14(R) shows a state in which the original ORG is placed face down on the original platen glass OP.

Copy output examples (a) to (i) and (J) are examples of copy outputs obtained by performing the above-described movement process on the original ORG in such a state.

When the 6th shift mode a is selected in the upper left direction using the key 114 in FIG.
Output (a) in FIG. 14 is obtained, and the same holds true up to (i). Further, when a state in which all nine LEDs of the display 115 are turned off is selected using the key 114, the output shown in FIG. 14(j), that is, the original ORG placed on the original platen glass OP is obtained. Note that all of the examples shown in FIG. 14 are taken at the same size. As can be seen from the example in FIG. 14, modes a, b, and c move the top edge of the document placed to the edge of the paper, and modes g, h,
Similarly, i moves the bottom edge to the edge of the paper, and mode d,
e and f are center-shifted in the main scanning direction.

Also, in modes a, d, and g, the left edge of the document is
In modes i, the right edge of the document is shifted eight times to the paper edge, and in modes b, e, and h, the center is shifted in the sub-scanning direction.

FIG. 15 shows the control flow of the editing described above, and will be explained.

For example, for a document as shown in FIG. 14(R), a document position coordinate detection scan is performed (SP900), and based on the above-mentioned logic, the four corner positions 1DXo and DX+ are detected.

Detect DYo, DY+ and size DX, DY, CPU
Set it in the area on the RAM in the unit 308 (SP90
1) Set the paper (recording material) sizes PX and PY selected by the keys 108 of the operation unit in the area on the RAM (SP902).

Next, according to the movement mode selected with the key 114, the distance IsFY from the front edge of the paper to the image in the sub-scanning direction is calculated and set in the area on the RAM (SP903, 9
04,905).

The set values of 5P903, 5P904, and 5P905 are as shown in FIG. Similarly, according to the 6th shift mode, the distance SF from the paper edge to the image in the main scanning direction
Calculate X and set it in the area on RAM. (SP9
06,907°908). This 5P906,907,9
Each set value of 08 is also illustrated in FIG.

When the document positioning movement amount is determined as described above, the write address counter WADR to the shift memory 907 and the read address counter RADR from the memory are set (S
P909). WADR is 297 during main scanning maximum reading
Set the number of dots equivalent to 400 dpi in mm, 4678, multiplied by MX'. Here, MX' means MX≧1
．． 0, that is, when the main scanning magnification is 100% or more, MX' = 1
and when MX<1.0, that is, reduction, MX' = MX
It is. Although this will not be explained in detail, this is because scaling in the main scanning direction is performed when writing to the shift memory 907 during reduction, and when reading from the shift memory 907 during enlargement.

If the same value as the WADR value is set as RADR, for example, at the same magnification, an image with no 8-fold image as shown in FIG. 1-4 (j) can be obtained. Therefore, for the WADR value, S
It is clear from the above explanation of the principle of movement that if FX/MX=-DXO·MX' is set, an image moved by SFX from the edge of the paper can be obtained.

Here, MX" means MX'-MX when MX≧1.0
, when MX<1.0(7), the value is M X″=1,
The reason for providing this coefficient is also based on the principle of variable magnification described above. With the above steps, the preparation for eight lines in the main scanning direction is completed.

Next & mRAM top no area T, S FY-MY.

In the case where DYO is set (SP910) and T+≧0(7), as explained in FIG.
This is the case where the timing of NCON is earlier by Ts I time (SP912-915), and the opposite is the case when TI<O (SP918-921).

Detailed explanations of both cases are as described above with reference to FIG.

In the case of T, ≧0, MY-DYO after the optical system starts moving forward.
After time (SP916, 917), TI < (1) case is after SFY time after VSYNCON (SP922, 92
3), since the effective image area is reached, S for cropping
T column 912) Set the EN counter 913 (
SP924.925).

Thereafter, after counting the time corresponding to the length of the effective image area in the sub-scanning direction (SP926, 927), the ST counter 912 and EN counter 913 are set to 0 in order to again prohibit document image output (SP928). Part 17) After PSY-(SF
Y+MY-DY) After time count (SP929.5P9
30), Set VSYNC to 0FFL/stop the optical system (
SP931), and as a result, VSYNC is output as a total PSY, that is, a section signal corresponding to the length of the paper size in the sub-scanning direction. Thereafter, the optical system returns to the reference position eight times and finishes scanning (SP932).

As explained above, by specifying the 8th shift position using the key 114, a total of 9 positions in the center and both ends of the recording material in each direction of main scanning and sub-scanning can be set according to the image size and the size of the recording material. This makes it possible to easily move to the destination without requiring any complicated operations.

Although this embodiment describes an example in which a read image is recorded on a recording material, the present invention is not limited to this, and the read image may be electronically filed or recorded via a line. It can also be transmitted.

〔effect〕

As described above, according to the present invention, by specifying the formation position on the recording material, it is possible to form an image at an appropriate position on the recording material.

[Brief explanation of the drawing]

Figure 1 is an external view of the document reading device, Figure 2 is an internal configuration diagram of the document reading device, Figure 3 is an internal configuration diagram of the printer, Figure 4 is an external view of the operation section, and Figure 5 is the document reading device. 6 is a circuit diagram of the shift memory section, FIG. 7 is a timing chart showing the operation of the shift memory section,
FIG. 8 is a circuit diagram of the document position detection section, FIG. 9 is a diagram showing the document position detection operation, FIGS. 10 and 11 are timing charts showing signals between the document reading device and the printer,
12, 13, and 14 are diagrams showing 9 images, and FIG. 15 is a flowchart showing a control procedure regarding the image shift. 1 is a CCD, 2 is a fluorescent lamp, 11
4 is a movement mode selection key, 115 is a display, 303 is a shift memory section, and 30 is a document position detection section.

Claims (2)

[Claims] (1) An image reading device that reads a document image and outputs it as an image signal, an image forming device that forms an image on a recording material based on the image signal, and a designation device that designates the position where the image is to be formed on the recording material. What is claimed is: 1. An image processing device comprising: an image processing device that forms a read image at a position corresponding to a recording material and an image. (2) The image processing apparatus according to claim (1), wherein one of a plurality of predetermined positions is specified by the specifying means.