JPH09149172A - Facsimile equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve reliability by selecting multilevel image data processed in a binary/multilevel conversion and multilevel smoothing means and read multilevel image data corresponding to an operating mode and sharing an image recording data processing part. SOLUTION: An image read part 20 directly outputs the multilevel image data obtained by a photoelectric sensor or the like by a data bus 52 and outputs binary image data obtained by performing a dither processing or the like in a binary image processing part 24 through a DMA-IF part 25 to a CPU bus 50. The binary image data at the time of facsimile reception and at the time of memory copying are sent through the DMA-IF part 34 to a binary/multilevel conversion and multilevel smoothing processing part 37, converted to the multilevel image data there and outputted to a data selector 38. The selector 38 selects the direct multilevel image data inputted through the bus 50 or the converted multilevel image data inputted through the processing part 37 corresponding to the operating mode. The selected image data are gradation corrected in a gamma processing part 39, an LD 43 is driven through an LD modulation part 40 or the like and recording is performed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a facsimile machine having a copy function.

[0002]

2. Description of the Related Art As a conventional facsimile apparatus of this type, image data is directly transferred between an image reading section (scanner) and an image recording section (printer), as disclosed in, for example, Japanese Patent Laid-Open No. 5-252327. By providing a bypass for transfer, and transferring the image data through the bypass in the copy mode to perform multi-gradation image recording, the data transfer load on the CPU bus is reduced and the image processing of the facsimile apparatus is accelerated. What you have done is known.

[0003]

However, in such a conventional apparatus, in the copy mode, the gamma conversion is performed by the multi-valued image processing section 24 of the image reading section or the gradation correction section 67 provided on the bypass line 66. Although the recorded image data processing such as (gradation correction) is performed, in the facsimile reception mode or the memory copy mode in which copying is performed via the memory, the image data must be recorded on the paper without gradation correction. Therefore, the image quality is worse than that of a copy image obtained by direct multi-valued image transfer. In order to solve this, the scaling unit 37 of the recording unit is provided with a gradation correction function to perform recording image data processing at the time of facsimile reception or memory copy. Because the processing has to be done separately,
There is a problem that the system configuration becomes complicated and the reliability decreases. In memory copy mode,
Image data read by scanning an original is stored in a page memory using a page memory used when transmitting and receiving a memory of a facsimile, and the stored image data is read and recorded. Therefore, as many sheets can be copied by one time of scanning the original, a plurality of copies can be made from one original at high speed (called multi-copy). At this time, if the multi-valued image data is stored in the memory, a large amount of memory capacity is required. Therefore, like the facsimile transmission / reception data, the binary image data is stored.

The present invention has been made in order to solve such a problem, and makes it possible to share the processing portion of recorded image data regardless of the operation mode, thereby facilitating the system configuration and improving the reliability. It is an object of the present invention to provide a facsimile device that can be improved.

Another object of the present invention is to improve the image quality at the time of facsimile reception and memory copy.

[0006]

In order to achieve the above-mentioned object, the invention according to claim 1 of the present application reads a multi-valued image of a document and performs predetermined multi-valued image processing to generate multi-valued image data. In addition, an image reading unit that converts the multi-valued image data into binary image data and outputs the binary image data, and an image recording unit that records the received image data or the image data read by the image reading unit on a recording sheet. By controlling the image reading unit and the image recording unit in accordance with the set operation mode, the binary image data output from the image reading unit is transmitted via the communication line and transmitted from the communication line. Facsimile transmission / reception function of receiving incoming binary image data and outputting it to the image recording unit, and copy function of recording multivalued image data read by the image reading unit and subjected to multivalued image processing in the image recording unit When 2 output from the image reading unit
In a facsimile device having a control unit having a memory copy function for temporarily storing the value image data in a memory and outputting the binary image data stored in the memory to the image recording unit, the facsimile device is sent from the control unit. Binary multi-value conversion for performing binary multi-value conversion and multi-value smoothing processing on incoming binary image data.
Any of multivalued smoothing processing means, multivalued image data processed by the binary / multivalued conversion / multivalued smoothing means, and multivalued image data read by the image reading unit and subjected to multivalued image processing. A selection means for selecting one of them according to the operation mode is provided, and a recording image data processing means for processing the recording image data on the multi-valued image data selected by the selection means is provided after the selection means. It is a thing.

According to a second aspect of the present invention, in the facsimile apparatus according to the first aspect, the multivalued image data read by the image reading unit and subjected to the multivalued image processing is directly input to the image recording unit. A transfer unit for transferring and a synchronization unit for controlling the reading operation timing of the image reading unit in synchronism with the recording operation timing of the image recording unit, and the control unit includes the synchronization unit in the copy mode. The operation timing of the image reading unit is controlled in synchronization with the operation timing of the image recording unit using the multi-valued image data, and the multi-valued image data is directly transferred from the image reading unit to the image recording unit via the transfer unit and via the selection unit. Recording image data processing is performed by the recording image data processing means and recording is performed on recording paper.

According to a third aspect of the present invention, in the facsimile apparatus according to the first aspect, the control unit is
In the facsimile transmission mode, the operation timing of the image reading unit is set independently to process the transmission image data.

According to a fourth aspect of the present invention, in the facsimile apparatus according to the first aspect, the control section is
In the facsimile reception mode or the memory copy mode, based on the operation timing of the image recording unit, the binary image data is transferred to the image recording unit, and binary multi-value conversion / multi-value smoothing processing means performs multi-value conversion and multi-value conversion. The value smoothing process is performed, and the recording image data processing unit performs the recording image data processing via the selecting unit to record on the recording paper.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

FIG. 1 is a block diagram of a facsimile apparatus according to an embodiment of each invention of the present application. This facsimile apparatus includes a main body control unit 1 and an image reading unit (scanner unit) 2
0 and an image recording unit (plotter unit) 30. Further, the main body control unit 1 includes a CPU (central processing unit) 2, R
OM (read only memory) 3, RAM (readable / writable memory) 4, I / O (input / output) section 5, electrical components 6 such as motors, clutches and solenoids, DMA (direct memory access) control section 7, DCR (Compression / playback unit) 8, operation display unit 9, communication control unit 10, NCU (network control unit) 11
And each unit is connected to the CPU bus 50.

The CPU 2 controls each part in accordance with a basic program as a facsimile machine stored in the ROM 3 and a control program of the present invention which will be described later to execute a sequence as a facsimile machine and a process of the present invention. The ROM 3 stores in advance a basic program as a facsimile device and a control program of the present invention.

The RAM 4 forms a memory area for temporarily storing various data when executing a sequence as a facsimile apparatus, and a page in which binary image data is temporarily stored during transmission / reception of a facsimile memory or during memory copy. A memory is formed.

Electrical components 6 such as motors, clutches and solenoids are connected to the I / O unit 5, and signals input from the electrical components 6 and control signals output from the CPU 2 are transmitted via the CPU bus 50. Give and receive.

The DMA control unit 7 controls the DMA transfer in which data is exchanged between the memory and each unit without passing through the CPU 2, and the data processing of the CPU 2 can be executed even during the data transfer process.

The DCR 8 encodes and compresses the image data according to a predetermined encoding method, and decodes and reproduces the encoded image data. The operation display unit 9 includes various operation keys such as a numeric keypad and a start key, and also includes a display such as a liquid crystal display. Various commands such as a transmission operation are input from the operation keys, and the operation keys are input to the display. The input command contents and various information notified to the operator from the facsimile device are displayed. Further, the operation display unit 9 is provided with a mode key for instructing and operating the facsimile mode and the copy mode.

The communication control unit 10 controls the facsimile communication
Facsimile control signals are exchanged with the partner facsimile machine via the NCU 11 to set communication functions and exchange various control information, and execute a facsimile control procedure. A communication line L such as a telephone line is connected to the NCU 11 and automatically receives an incoming call from the line L and performs an automatic outgoing call process to the line L.

On the other hand, the image reading section 20 comprises a sensor unit 21, an A / D converter 22, a multi-valued image processing section 23, 2.
Value image processing unit 24, S / P conversion / DMA-I / F unit 25
And the operation control timing generator 26.

The sensor unit 21 is a CCD (Charge C
Oupled Device) and a photoelectric sensor such as a contact sensor.
It is output to the / D converter 22, and its reading timing is controlled by a timing signal output from the operation control timing generation unit 26.

The A / D converter 22 converts the analog image signal input from the sensor unit 21 into a predetermined multivalued digital signal and outputs it to the multivalued image processing section 23. The multi-valued image processing unit 23 corrects the shading of the multi-valued digital signal input from the A / D converter 22 and MTF.
The multi-valued image data that has undergone multi-valued digital image processing such as correction and scaling processing is output to the binary image processing unit 24. Also,
A direct-connection multi-valued image data path 52 is provided as a transfer unit according to claim 2, wherein the output line of the multi-valued image processing unit 23 is connected to the image recording unit 30 and the multi-valued image data is directly transferred to the image recording unit 30. There is.

The binary image processing unit 24 is a multi-valued image processing unit 2.
The binary image data obtained by performing binary digital image processing such as black and white inversion including binary processing such as tether processing and error diffusion processing and isolated point removal on the multi-valued image data input from
It outputs to the P conversion DMA-I / F unit 25. S / P conversion D
The MA-I / F unit 25 performs S / P (serial / parallel) conversion processing of binary image data input from the binary image processing unit 24 and transfer processing of image data to the DMA control unit 7.

Operation control timing generator 26
Determines the operation timing of each unit of the image reading unit 20 in accordance with an instruction from the CPU 2, generates various operation timing signals, and generates a reference clock signal according to a reference clock signal input from an image recording unit 30 described later. A read operation timing signal that is synchronized with.

The image recording section 30 includes a sync signal detecting section 31, an operation control timing generating section 32, and a DMA.
-I / F units 33 and 34, DAM control unit 35, RAM3
6, binary multi-value conversion / multi-value smoothing processing unit 37, data selector 38, gamma (γ) conversion unit 39, LD modulation unit 40, L
It is composed of a D-I / F section 41, an LD driver 42, a laser diode (LD) 43, and a photodiode 44.

The sync signal detector 31 detects the laser emission of the laser diode 43 by the photodiode 44, detects the line sync signal of the laser printer, and outputs it to the operation control timing generator 32. The operation control timing generation unit 32 determines the operation timing of each unit of the image recording unit 30 according to an instruction from the CPU 2,
While generating various operation timing signals, a reference operation clock signal according to the line synchronization signal is selected and output to the operation control timing generation unit 26 in the image reading unit 20. Therefore, the control signal line 51 for exclusively outputting the reference operation clock signal is provided. With these, the synchronization means according to claim 2 is configured.

The DMA-I / F section 33 transfers the multi-valued image data input from the multi-valued image processing section 23 in the image reading section 20 via the direct-coupled multi-valued image data path 52 to the DMA control section 3.
Transfer processing to 5. In addition, the DMA-I / F unit 34 has a C
S / P conversion in the image reading unit 20 via the PU bus 50
The binary image data input from the DMA-I / F unit 25 is transferred to the DMA control unit 35. DMA control unit 35
Controls DMA transfer processing of image data in the image reading unit 30. The RAM 36 forms a memory area for temporarily storing the image data before recording.

The binary / multivalue conversion / multivalue smoothing processing unit 37
Binary image data sent via the PU bus 50 is subjected to binary multi-value conversion and multi-value smoothing processing, which will be described later, based on a predetermined algorithm, and the obtained multi-value image data is sent to the data selector 38. It is to be output, and 2 according to claim 1.
It corresponds to a multi-value conversion / multi-value smoothing means. The data selector 38 is the multi-valued image data input from the multi-valued image processing unit 23 in the image reading unit 20 via the direct connection multi-valued image data path 52, or the binary multi-value conversion / multi-value smoothing processing unit 37.
One of the multi-valued image data input from the above is selected based on the operation mode and output to the gamma conversion unit 39, which corresponds to the selecting means according to claim 1.

The gamma converter 39 has a data selector 38.
The multi-valued image data selected and output from is subjected to a predetermined gradation correction and output to the LD modulator 40. The LD modulator 40 is
The LD drive signal is modulated based on the gradation-corrected multivalued image data from the gamma conversion unit 39, and the LD-I / F unit 4
1 to the LD driver 42. The LD driver 42 drives the laser diode 43 based on an LD drive signal input from the LD modulation unit 40 via the LD-I / F unit 41 to perform multi-valued image recording on recording paper. With these, the recorded image data processing means according to claim 1 is configured.

The feature of this embodiment is that the multivalued image data from the multivalued image processing unit 23 of the image reading unit 20 is transferred to the image recording unit 3.
Directly connected multi-valued image data path 52 for direct transfer to 0
And a control signal line 51 for controlling the reading operation timing in synchronization with the recording operation timing,
Binary multi-value conversion that performs binary multi-value conversion and multi-value smoothing processing on binary image data during facsimile reception and memory copy
A multi-value smoothing processing unit 37 and a data selector 38 for selecting either one of the multi-valued image data which is the output thereof or the multi-valued image data processed by the multi-valued image processing unit 23 of the image reading unit 20 based on the operation mode. That is, the recording image data processing part such as the gamma conversion part 39 and the LD modulation part 40 is provided in the subsequent stage of the data selector 38.

Binary image data at the time of facsimile reception and memory copy is subjected to binary multi-value conversion / multi-value smoothing processing 2
By providing the multi-value conversion / multi-value smoothing processing unit 37 and the recording image data processing unit such as the gamma conversion unit 39 and the LD modulation unit 40 at the subsequent stage of the data selector 38, copying, facsimile, etc. Since the recorded image data processing portion can be shared regardless of the operation mode, the system configuration can be facilitated and the reliability can be improved.

Next, regarding the embodiment of claim 2,
This will be described with reference to the flowchart shown in FIG. In addition,
According to a second aspect of the present invention, in the device configuration of FIG.
It is realized by the CPU 2 executing the program shown in the flowchart of FIG.

In the flowchart of FIG. 2, first, it is checked whether the operation mode instructed and set by the operation display unit 9 is the copy mode (decision 101). In the copy mode (Y in judgment 101), the operation timing of the image recording unit (plotter unit) 30 is set to the optimum value for the plotter: T
Set to p (process 102). The operation timing referred to here is one line cycle (the time required to record one line of image data), and can be calculated based on the following equation.

Tlp = 1 / (vp.Rsp) Tlp: One line cycle (S / l) vp: Moving speed of the photoconductor surface in the sub-scanning direction (mm / S) Rsp: Writing density in the sub-scanning direction (dot / mm) That is, one line period is determined by the moving speed of the photoconductor surface in the sub-scanning direction and the writing density in the sub-scanning direction.

Next, the operation timing of the image reading section (scanner section) 20 is synchronized with the operation timing of the plotter: Tp (process 103). The above processing 10 until synchronization
Repeat steps 2 and 103, and if synchronization is OK (decision 1
(Y of 04), the multi-valued image data output from the multi-valued image processing unit 23 is directly transferred page by page from the scanner unit 20 to the plotter unit 30 (process 105). The multi-valued image data transferred to the plotter unit 30 is input to the gamma conversion unit 39 via the data selector 38, subjected to predetermined gradation correction, and based on the gradation-corrected multi-valued image data, the LD modulation unit. The laser diode 43 is driven through the 40, the LD-I / F unit 41, and the LD driver 42, and the multivalued image data is recorded on the recording paper.

The above recording operation is repeated until the page end is reached (N of decision 106 → loop of process 105). When the page end is reached (Y of decision 106), the scanner operation is stopped (process 107), and thereafter. , The plotter operation is stopped (process 108).

On the other hand, when the operation mode is facsimile reception or memory copy (N in judgment 101 → judgment 10)
9), the plotter operation timing is set to the optimum value for the plotter: Tp (process 110), the image data temporarily stored in the page memory is transferred to the plotter unit 30 in page units (process 111), and the recording paper is used. To record. When the page end is reached (Y at decision 112), the plotter operation is stopped (process 113).

As described above, in the copy mode, the operation timing of the scanner is controlled in synchronization with the optimum operation timing for the plotter, and the multivalued image data is directly transferred from the scanner unit 20 to the plotter unit 30 at the optimum timing of the plotter. By doing so, the DMA transfer load of the system can be reduced. Therefore, the system load due to the image data transfer in the copy mode can be reduced. Further, since image data can be transferred to the plotter unit 30 without intermittent operation of the scanner, in motor control,
It is possible to eliminate the slew-up and slew-down operations in the high-speed operation and simplify the motor control circuit. Therefore, the system configuration can be further simplified and the reliability can be improved.

Next, regarding the embodiment of claim 3,
This will be described with reference to the flowchart shown in FIG. In addition,
According to a third aspect of the present invention, in the device configuration of FIG.
It is realized by executing the program shown in the flowchart of FIG.

In the flowchart of FIG. 3, first, it is checked whether the operation mode instructed and set by the operation display unit 9 is the copy mode (decision 201). If it is in the copy mode (Y in judgment 201), the operation timing of the scanner is controlled in synchronization with the operation timing of the optimum value of the plotter, as in the copy mode of the above-described embodiment, to control the DMA transfer load of the system. Is reduced (Processing 2
02-Process 208).

If the operation mode is the facsimile transmission mode (N in judgment 201 → Y in judgment 209), the scanner operation timing is set to the optimum value for the scanner: Ts (process 210), and the read image data is read in page units. Then, the data is transferred from the scanner unit 20 to the page memory (process 211).
When the page end is reached (Y in determination 212), the scanner operation is stopped (process 313). The image data transferred to the page memory is subjected to processing such as encoding / compression by the DCR 8 and sent to the communication line L via the communication control unit 10 and NCU 11.

The scanner operation timing is one line cycle (the time required to read one line of image data), as in the plotter one line cycle of the above embodiment.
And can be calculated based on the following equation.

Tls = 1 / (vs.Rss) Tls: 1 line cycle (S / l) vs: moving speed of original in the sub-scanning direction (mm / S) Rss: reading density in the sub-scanning direction (dot / mm) One line cycle is determined by the moving speed of the document in the sub-scanning direction and the reading density in the sub-scanning direction.

As described above, when the operation mode is the facsimile transmission mode, the scanner can be controlled at the optimum operation timing. For example, when image data is transmitted, time is required for image compression. In addition, intermittent operation may occur during direct transmission. Therefore, by setting one line cycle in advance to a larger value than during copy operation, it is possible to operate at low speed in motor control, so that applied pulse settings for slew up and through down can be set. It becomes easier and the motor control circuit can be simplified. Therefore, the system configuration can be further simplified and the reliability can be improved.

Next, regarding the embodiment of claim 4,
This will be described with reference to the flowchart shown in FIG. In addition,
According to a fourth aspect of the present invention, in the device configuration of FIG.
It is realized by the CPU 2 executing the program shown in the flowchart of FIG.

In the flowchart of FIG. 4, first, it is checked whether the operation mode instructed and set by the operation display unit 9 is the facsimile reception or memory copy mode (decision 301). If the operation mode is the facsimile reception or memory copy mode (Y in judgment 301), the operation timing of the plotter is set to the optimum value for the plotter: Tp (process 302). The operation timing mentioned here is one line cycle of the plotter, as in the above embodiment.

Next, the binary image data temporarily stored in the page memory is transferred from the page memory to the plotter unit 30 in page units via the CPU bus 50 (process 30).
3). Then, for the transferred binary image data, 2
The multi-value conversion / multi-value smoothing processing unit 37 performs binary multi-value conversion and multi-value smoothing processing. Binary multi-value conversion / multi-value smoothing processing unit 3
The multi-valued image data output from 7 is the data selector 3
8 is input to the gamma conversion unit 39, predetermined gradation correction is performed, and based on the gradation-corrected multivalued image data,
LD modulation section 40, LD-I / F section 41, LD driver 4
The laser diode 43 is driven via 2 and multi-valued image data is recorded on the recording paper (process 304).

The above recording operation is repeated until the page end is reached (N in decision 305 → loop of processing 303 and 304), and when the page end is reached (Y in decision 305).
The plotter operation is stopped (process 306).

The above-mentioned binary / multi-value conversion / multi-value smoothing processing will be briefly described. FIG. 5 shows an example of correspondence between image density and multi-value gradation values. In FIG. 5, the code is 0 to F
Ordinary 2 values out of 16 values, and 3 values as multi-valued,
An example of a multi-value gradation value code and image density when selecting 4-value or 5-value is shown.

FIG. 6 shows an example of the multilevel smoothing method. In FIG. 6, 3 of 200 dpi × 200 dpi
Image data of × 3 matrix is 400d per pixel
This is an example of binary and ternary values when the pixel density is reset for each divided pixel by dividing the pixel into four pixels of pi × 400 dpi. The binary multi-value conversion / multi-value smoothing process can be realized by referring to the peripheral pixel pattern of the pixel of interest and replacing it with a predetermined conversion pattern based on a predetermined algorithm.

As described above, during facsimile reception or memory copy, as shown in FIG. 6, the diagonal lines of the original image, which is a binary image, are subjected to binary multi-value conversion / multi-value smoothing processing, resulting in unevenness. It becomes less noticeable and the image quality can be improved. Furthermore, the image quality can be further improved by performing gradation correction by the gamma conversion unit 39.

In the embodiments of the inventions of claims 2 to 4, the respective characteristic parts have been described separately for each mode in order to clarify the correspondence.
These are used in combination, and thus, in addition to the individual effects, a synergistic effect due to the combination can be expected.

[0051]

As described above, according to the invention of claim 1 of the present application, a multi-valued image of a document is read, and predetermined multi-valued image processing is performed to generate multi-valued image data, and at the same time, the multi-valued image data is generated. An image reading unit that converts the value image data into binary image data and outputs the binary image data, an image recording unit that records the received image data and the image data read by the image reading unit on a recording sheet,
By controlling the image reading unit and the image recording unit according to the set operation mode, the binary image data output from the image reading unit is transmitted via the communication line, and the binary image data transmitted from the communication line is transmitted. Facsimile transmission / reception function of receiving image data and outputting it to the image recording unit, copy function of recording multivalued image data read by the image reading unit and subjected to multivalued image processing in the image recording unit, and image reading unit And a controller having a memory copy function for temporarily storing the binary image data output from the memory in the memory and outputting the binary image data stored in the memory to the image recording unit. Binary multi-value conversion / multi-value smoothing processing means for performing binary multi-value conversion and multi-value smoothing processing on the binary image data sent from Multi-valued image A selection means is provided for selecting either one of the data and the multi-valued image data read by the image reading unit and subjected to the multi-valued image processing according to the operation mode, and the selection means is provided at a stage subsequent to the selection means. Since the recorded image data processing means for processing the recorded image data on the multi-valued image data selected in step 1 is provided, the recorded image data processing portion can be shared regardless of the operation mode such as copying or facsimile, so that the system configuration can be improved. There is an effect that the reliability can be improved easily.

Further, according to the invention described in claim 2, in the facsimile apparatus according to claim 1, the multivalued image data read by the image reading unit and subjected to the multivalued image processing is directly input to the image recording unit. A transfer unit for transferring and a synchronization unit for controlling the reading operation timing of the image reading unit in synchronization with the recording operation timing of the image recording unit,
In the copy mode, the control unit controls the operation timing of the image reading unit in synchronization with the operation timing of the image recording unit by using the synchronization unit, and transfers the multivalued image data from the image reading unit to the image recording unit. The recording image data is directly transferred via the means, and the recording image data processing means performs the recording image data processing via the selecting means to record the recording paper. Therefore, the same effect as that of claim 1 can be obtained. The system load due to image data transfer in the copy mode can be reduced. Further, since the image data can be transferred to the image recording section without intermittent operation of the image reading section, the motor control circuit can be simplified, the system configuration can be further simplified, and the reliability can be improved. effective.

According to a third aspect of the present invention, in the facsimile apparatus according to the first aspect, the control section independently sets the operation timing of the image reading section in the facsimile transmission mode to transmit image data. Since the processing is performed, the same effect as that of claim 1 can be obtained, and in the facsimile transmission mode, the operation is performed at the optimum operation timing for the image reading section regardless of the operation timing of the image recording section. Therefore, it is possible to easily realize the system configuration for realizing the intermittent operation at the time of direct transmission, and further simplify the system configuration.
There is an effect that the reliability can be improved.

According to a fourth aspect of the present invention, in the facsimile apparatus according to the first aspect, the control section is set to 2 based on the operation timing of the image recording section in the facsimile reception mode or the memory copy mode. The value image data is transferred to the image recording unit, the binary multi-value conversion / multi-value smoothing processing means performs the binary multi-value conversion and the multi-value smoothing processing, and the recording image data processing means further selects the recording image via the selecting means. Since the data is processed and recorded on the recording paper, the same effect as in claim 1 can be obtained, and
There is an effect that the image quality at the time of facsimile reception and memory copy can be improved.

[Brief description of the drawings]

FIG. 1 is a block configuration diagram of a facsimile apparatus according to an embodiment of each invention of the present application.

FIG. 2 is a flowchart showing an embodiment of the invention according to claim 2;

FIG. 3 is a flowchart showing an embodiment of the invention according to claim 3;

FIG. 4 is a flowchart showing an embodiment of the invention according to claim 4;

FIG. 5 is an explanatory diagram showing an example of correspondence between image densities and gradation values.

FIG. 6 is an explanatory diagram showing an example of smoothed image data.

[Explanation of symbols]

 1 main body control unit 2 CPU 3 ROM 4, 36 RAM 5 I / O unit 6 electrical equipment 7, 35 DMA control unit 8 DCR 9 operation display unit 10 communication control unit 11 NCU 20 image reading unit 21 sensor unit 22 A / D converter 23 multi-valued image processing unit 24 binary image processing unit 25 S / P conversion / DMA-I / F unit 26, 32 operation control timing generation unit 30 image recording unit 31 synchronization signal detection unit 33, 34 DMA-I / F unit 37 two-value multi-value conversion / multi-value smoothing processing unit 38 data selector 39 gamma conversion unit 40 LD modulation unit 41 L / D-I / F unit 42 LD driver 43 laser diode 44 photodiode 50 CPU bus 51 control signal line 52 direct connection Multi-valued image data path

Claims (4)

[Claims] 1. A multi-valued image of a document is read, predetermined multi-valued image processing is performed to generate multi-valued image data, and
An image reading unit that converts the multi-valued image data into binary image data and outputs the image data, and an image recording unit that records the received image data or the image data read by the image reading unit on a recording sheet are set. By controlling the image reading unit and the image recording unit according to the operation mode, the binary image data output from the image reading unit is transmitted via the communication line, and the binary image data transmitted from the communication line is transmitted. A facsimile transmission / reception function of receiving image data and outputting it to the image recording unit; a copy function of recording multivalued image data read by the image reading unit and subjected to multivalued image processing in the image recording unit; And a control unit having a memory copy function for temporarily storing the binary image data output from the image reading unit in a memory and outputting the binary image data stored in the memory to the image recording unit. In the facsimile apparatus, binary multi-value conversion / multi-value smoothing processing means for performing binary multi-value conversion and multi-value smoothing processing on the binary image data sent from the control unit; The multi-valued image data processed by the value smoothing means and the selection means for selecting one of the multi-valued image data read by the image reading unit and subjected to the multi-valued image processing according to the operation mode are provided. A facsimile apparatus, characterized in that a recording image data processing means for processing the recording image data on the multi-valued image data selected by the selecting means is provided after the selecting means. 2. The facsimile apparatus according to claim 1, further comprising: a transfer unit for directly transferring the multi-valued image data read by the image reading unit and subjected to the multi-valued image processing to an image recording unit; The control unit is provided with a synchronization unit for controlling the reading operation timing of the image reading unit in synchronization with the recording operation timing of the recording unit, and the control unit synchronizes with the operation timing of the image recording unit using the synchronization unit in the copy mode. By controlling the operation timing of the image reading unit, the multi-valued image data is directly transferred from the image reading unit to the image recording unit via the transfer unit, and the recorded image data processing unit is processed by the recording image data processing unit via the selecting unit. A facsimile machine characterized by carrying out the above and recording on a recording paper. 3. The facsimile apparatus according to claim 1, wherein the control section independently sets the operation timing of the image reading section in the facsimile transmission mode to process the transmission image data. 4. The facsimile apparatus according to claim 1, wherein the control section is based on an operation timing of the image recording section in the facsimile reception mode or the memory copy mode.
Transfer binary image data to image recording unit
A facsimile characterized in that multi-value smoothing processing means performs binary multi-value conversion and multi-value smoothing processing, and further, recording image data processing means performs recording image data processing through selection means and records on recording paper. apparatus.