JP3238698B2 - Facsimile machine - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a facsimile apparatus, and more particularly, to a facsimile apparatus having a copy mode in which an image read by a reading unit is formed in a storage unit of the same apparatus and output.

2. Description of the Related Art In a conventional facsimile apparatus having a copy mode, the facsimile apparatus operates as a digital copier when the copy mode is set in the facsimile apparatus.

[Problems to be Solved by the Invention] In a facsimile apparatus having a copy mode, when the apparatus is set in the copy mode, data processing of an image read according to the resolution and halftone expression characteristics of the reading device and the recording device. And an image is formed with an optimum dot diameter.

On the other hand, in the facsimile mode, an image is output based on the data transmitted at the resolution and gradation specified by the standard, but the transmitted image data is different from the performance and density characteristics of the recording device on the receiving side. Since it is irrelevant, if the image is formed with the same dot diameter as in the copy mode, the image read on the sending side cannot be reproduced faithfully.For example, the density of the halftone image is reproduced higher than the optimum density. In addition, the line image in a text image mainly composed of characters becomes thin or cut off, making it difficult to read.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a facsimile apparatus having a copy mode, which can faithfully reproduce a received image read on a transmission side. Aim.

Means for Solving the Problems An image reading section and an image forming section according to the present invention are provided, and an image is formed by the image forming section based on a signal received from a communication line and a read signal from the image reading section. The facsimile apparatus has control means for changing a recording dot size in an image forming unit depending on whether an image is formed based on a reception signal or a read signal.

Preferably, when the image is formed based on the received signal, the control unit determines whether the received signal is a text image, and further changes the recording dot size in the image forming unit.

[Operation] In the facsimile apparatus according to the present invention, the recording dot size in the image forming unit is changed depending on whether the image is formed based on the received signal or the read signal.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

FIG. 1 shows a document reading section 1 for transmission of a laser facsimile apparatus capable of performing a copying operation and a printing section 11 for reception.
It is a schematic sectional drawing which shows the outline of.

In the document reading unit 1, the scanner 4 moves and scans the document while irradiating the document on the platen 2 with the light source 3. The light reflected from the original is reflected by a mirror, passes through a lens 5 and enters a linear CCD sensor (for example, 8 pixels / mm) 6. The output signal of the linear CCD sensor 6 is digitized as described later, and then binarized. When reading is performed by the original moving type, the configuration is simplified.

In the printing unit 11, the light emission of the laser diode is controlled by the laser optical system 12 in accordance with the received signal, and the laser light enters the photoconductor 13. And development, transfer,
The fixing is performed, and the received signal is printed on plain paper.

Since the contents of the above reading and printing operations are the same as those of the conventional laser printer, detailed description thereof will be omitted.

Next, an outline of the operation of the facsimile machine will be described with reference to FIG. First, the operation at the time of transmission will be described. The original is converted into an electric signal by the photoelectric conversion unit 31 including the linear CCD sensor 6 of the reading unit 1. Next, the converted electrical signal is subjected to predetermined binarization processing (such as dither processing) by the processing unit 32, and is converted into a binarized time-series signal.
Next, the data is encoded by the compression unit 33 using a method such as MH or MR. Next, the encoded signal is stored in the code memory 34. The transmission control unit 35 establishes connection with the called side, and signals in the memory 34 are transmitted to the line through the line connection unit 36 in a predetermined procedure.

Next, the operation at the time of reception will be described. Line connection part 36
When the transmission control unit 35 receives a connection request from the calling side through, the line is connected, a signal is received, and the signal is stored in the code memory. The expansion unit 37 decodes the signal in the code memory 34, and converts the decoded signal into a signal that can be output by the recording unit 38. The page memory 40 temporarily stores this signal. The image mode detection unit 41 determines whether the expanded image is a text image or a halftone image by looking at the expanded white and black image strings. Details of this content will be described later. The image data stored in the page memory 40 is stored in the recording unit 38.
The recording unit 38 forms an image on a sheet based on the image data.

Next, the operation in the copy mode will be described with reference to FIG. 1 and FIG. Linear CCD sensor 6 of reading unit 1
The original is converted into an electric signal by the photoelectric conversion unit 31 including the. Next, predetermined binarization processing (such as dither processing) is performed by the processing unit 32, and the signal is converted into a binarized time-series signal. Then, it is recorded by the recording unit 38.

Next, the operation in the management report output mode will be described. When a management report key 56 (see FIG. 3) for creating a management report, which will be described later with reference to FIG. 3, is depressed, the data that has been recorded for each facsimile transmission and reception is stored in the facsimile apparatus. It is represented by the character font stored in the ROM. It is transferred to the page memory 40 and output as a management report via the recording unit 38.

Note that the control unit 39 processes the above signals in accordance with the instruction of the operation display unit 51.

FIG. 3 is a plan view showing the operation display unit 51. The transmission key 52 is a key for starting transmission. STOP key 53
Is a key for stopping transmission halfway. Various keys (“1”, “2” ..., “9”, “0”, “*”,
"#") 54 is a key used for setting, clearing and registering a telephone number.

The halftone key 58 is a key for selecting whether to perform binarization processing of an image by reading during copying or transmission, or to perform halftone processing (dither processing). The copy key 57 is a key for starting a document copy. The management report key 56 is a key for starting to output data at the time of sending and receiving, for example, time, telephone number, number of sheets, etc. in the form of a list.

FIG. 4 is a block diagram of the CPU 71 for controlling the facsimile machine. The CPU 71 is connected to a working RAM 72 and a clock IC 73 for a timer.

The CPU 71 is provided with a key matrix 52 of the operation display section 51.
To 58, the LCD display unit 59, and each control unit (see FIG. 2).

I. First Embodiment Next, the operation of the facsimile apparatus according to the first embodiment of the present invention will be described with reference to FIGS. 5A and 5B. In the first embodiment of the present invention, the dot size of the dots forming the image is switched between reception and copy mode.

At the time of reception, it is automatically determined whether the image is a halftone image or a text image based on the received data, and in the case of a halftone image, the dot diameter is set smaller so that the image density can be faithfully reproduced. In the case of a text image, the dot diameter is set large so that characters and the like can be clearly reproduced without the line image being too thin or broken.

On the other hand, in the copy mode, the dot diameter can be switched and the density of the image can be set freely by operating the keys on the operation panel as judged by the operator.

FIG. 5A is a block diagram of a switching circuit for switching a dot size according to a mode and an image type, and FIG.
5A is a timing chart of the circuit shown in FIG. 5A.

Referring to FIG. 5A, a switching signal is output from CPU 71 depending on whether the facsimile apparatus is in the reception mode or the copy mode, and thereby switch 116 is switched. When the facsimile apparatus is in the reception mode, the switch 112 is switched according to the dot size determination signal from the image mode detection unit 41.
The switch 115 is switched by the dot size switching signal from. Therefore, the settings of the resistance values 110 and 113 are different between the copy mode and the reception mode, and the setting of the comparison voltage is different. As a result, the dot size is switched.

In FIG. 5B, a waveform a indicates a clock, and the clock is used to synchronize the reading of the print data from the page memory 40 with the triangular wave generating circuit used to control the dot size. The waveform b is a triangular waveform generated in synchronization with the clock. A waveform c is a waveform of the print data read out in synchronization with the clock. When the value of the waveform c is 1, it corresponds to black, and when it is 0, it corresponds to white.

Waveforms d and f are pulse waveforms indicating the dot size.
The switch 116 is set to the copy mode by a signal from the CPU 71, and when the dot size switching signal is "1", the switch 11
When 5 is turned off, the output waveform of the comparator 108 becomes the waveform d.
When the switch 116 is set to the receiving mode side and the dot size determination signal is “1” and the switch 112 is turned off, the comparator 108
The comparison voltage inputted to the comparator 108 increases, and the output waveform of the comparator 108 becomes a waveform f. Waveform c and d or f are AN
It is calculated by the D gate 109, and when the waveform d is input,
When the waveform e is output from the D gate 109 and the waveform f is input, the output waveform of the AND gate 109 becomes the waveform g. This controls the energization time to the semiconductor laser 101,
Then, the dot size is controlled.

In this embodiment, the dot diameter is set to be larger in the copy mode than in the reception mode, but may be set in reverse according to the characteristics such as the resolution of the facsimile apparatus.

The dot size switching signal is a signal sent from the CPU 71 in accordance with the designation of the operator in the copy mode, and when this signal becomes “0”, the switch 115 is turned on.
, And the dot size is set further larger by lowering the comparison voltage. As the dot size increases, the overall image density increases and the reproducibility of the halftone image decreases, but the text image is clearly reproduced and becomes easier to read.

When the dot size determination signal from the image mode detection unit 41 is “0” in the reception mode, the switch 112 is turned on,
The dot size is set larger than when the dot size determination signal is “1”.

FIG. 6 is a flowchart showing a main flow of the CPU 71 for controlling the facsimile. In step S1, CPU7
Initial setting after reset of 1 is performed. Step S2
Thus, the input / output processing of the CPU 71 is generally performed. Also,
In particular, it is determined whether or not to perform halftone processing. In step S3, the control mode indicating the control state is checked, and the program branches according to the value. If the control mode value is 0, step S4; if 1, the step
Go to S5, if 2 go to step S6. In the standby mode of step S4, an incoming signal due to key operation or reception is waited for. When the device is performing reception processing, the program proceeds to the reception mode in step S5. If the mode is the copy mode, the process proceeds to step S6, and the copy is executed. In the management report output mode, the program proceeds to step S7, and a management report is output. At the time of processing other than the reception mode, for example, at the time of transmission mode or registration of one-touch dialing, the program proceeds to other processing of step S8. After each process, the program returns to step S2.

FIG. 7 is a flowchart showing the flow of the input / output processing (step S2). In step S301, the halftone flag is checked. This flag is set to “0” by default, and selects execution of halftone processing described later. When the halftone flag is “0”, the program proceeds to step S302, and when the halftone flag is “1”, the program proceeds to step S304 to accept a change of selection or non-selection of halftone processing. Step S302
Then, the ON edge (change from the OFF state to the ON state) of the halftone key 58 is checked. When the ON edge is detected, the program proceeds to step S303, sets the halftone flag to “1”, and proceeds to step S306. If no ON edge is detected, the program proceeds directly to step S306. In step S304, the ON edge of the halftone key 58 is checked. When an ON edge is detected, the program proceeds to step S3.
Go to 05, set the halftone flag to “0”, and step S306
Proceed to. If no ON edge is detected, the process proceeds directly to step S306. In step S306, input processing of other keys and sensors and output processing to a load are performed.

FIG. 8 is a flowchart showing the flow of processing in the standby mode (step S4). Steps S101, S103, S1
05: incoming signal, copy mode key 57, management report key
Check 56 inputs. When an incoming signal is input,
The program proceeds to step S102, sets the control mode to 1, and returns. When the management report key 56 is pressed, the program proceeds to step S105, sets the control mode to 3, and returns. If the copy key 57 has been pressed, the program proceeds to step S104, sets the control mode to 2, and returns.
When both keys 56 and 57 are not pressed, and when there is no incoming signal, the program proceeds to step S107, performs other processing, and returns.

FIG. 9 is a flowchart showing the operation in the reception mode. In step S200, the value of the internal state in the reception mode is determined.
The process branches to one of 01, S211, S221, S231, and S241. When the internal state is 0, the program proceeds to step S201, and a facsimile connection procedure is executed. Step S2
In 02, it is determined whether or not the connection is completed. If the connection is not completed, the program returns as it is, and if completed, the program updates the internal state in step S203 and returns.

If the internal state is 1, the program proceeds to step S2
Proceeding to 11, the transmitted image data is transferred to the code memory. In step S212, it is determined whether the transfer has been completed. If the transfer has not been completed, the program returns as it is, and if completed, the program updates the internal state in step S213 and returns.

If the internal state is 2, the program proceeds to step S2
Proceed to 21 to perform the disconnect procedure. In step S222, it is determined whether or not the disconnection has been completed. If the disconnection has not been completed, the program returns as it is, and if completed, the program updates the internal state in step S223 and returns.

When the internal state is 3, the program proceeds to step S2
Proceed to 31 to determine the number of remaining pages that need to be output. If the remaining pages are 0, the program proceeds to steps S232 and S2.
At 33, the internal state is set to 0 and the control mode is set to 0, and the process returns to the standby mode S4. Step S231
If the remaining pages are not 0, the program proceeds to S234 and S235, where the contents of the code memory 34 are expanded and transferred to the page memory 40. Here, the image is expanded for each line, and details of the content will be described later. Next step
In step S235, it is determined whether or not the expansion has been completed. If the expansion has been completed, the program sets the switch 116 to the reception mode in step 236, executes printing in steps S237 and S238, and updates the internal state. If the extension has not been completed in step S235, the program returns.

When the internal state is 4, the program proceeds to step S2
Proceeding to 41, it is determined whether or not printing has been completed. If printing has not been completed, the process returns as it is. When completed, the program returns the internal state to 3 in step S252.

FIG. 10 is a flowchart showing the operation in the copy mode. In step S400, the value of the internal state of the copy mode value is determined, and the program proceeds to step S4 according to the value.
The process branches to one of 01, S411, S421, and S431. When the internal state is 0, the presence or absence of a document is determined. If there is no original, the program proceeds to steps S402 and S403, sets the internal state and control mode to 0, and returns. If there is a document, it is determined in step S404 whether or not the halftone mode is set. If the mode is the halftone mode, halftone processing such as dither processing is performed and reading is performed. If not, the original is read by simple binarization, the internal state is updated in step S405, and the routine returns.

When the internal state is 1, the program proceeds to step S4
Proceeding to 11, it is determined whether the reading has been completed. If not finished, the program returns as it is, and if finished, the internal state is updated in step S412 and the process returns.

If the internal state is 2, the program proceeds to step S4
Proceeding to 21, it is determined whether the halftone flag is "1" or "0".
If "1", the program sets the dot size switching signal to "1" in step S422, and if "0", the program sets the dot size switching signal to "0" in step S423. And step
At 424, the switch 116 shown in FIG. 5A is switched to the copy mode, printing is executed at steps S425 and S426, the internal state is updated, and the program returns.

When the internal state is 3, it is determined whether the printing is completed. If not, the process returns as it is. When the process is completed, the internal state is set to 0 in step S432 and the process returns.

FIG. 11 is a flowchart showing the operation in the management report output mode. In step S500, the value of the internal state of the management report output mode is determined, and the step is performed according to the value.
The process branches to one of S501, S511, and S521.

When the internal state is 0, the management data is transferred to the page memory 40 in step S501, and the internal state is updated in step S502.

If the internal state is 1, it is determined in step S511 whether the transfer has been completed. If not finished, the program returns as it is.
Then, the copy mode is switched to the dot mode by switching the switch 116, the process proceeds to step S513, the dot size switching signal is set to "0", printing is executed in step S514, and the internal state is updated in step S515.

If the internal state is 2, the program proceeds to step S5
Proceeding to 12, it is determined whether printing has been completed.
If the printing is not completed, the process returns as it is. When the printing is completed, the internal state and the control mode are set to 0 in steps S522 and S523, and the process returns.

Next, a method of determining the image mode will be described with reference to FIG. FIG. 12 is a block diagram showing details of the image mode detection unit 41. Referring to FIG. 12, image mode detecting section 41
Is connected to the decompression unit 37, and outputs counters A to D that count up in response to a synchronization signal for each line, and outputs a signal that determines the type of image in response to signals from the counters C and D. It includes a gate 75 and a determination result memory 76 for recording the determination result of the type of image based on the signal from the NAND gate 75. The counter A counts the number of continuous black pixels in response to a synchronization signal for each line. However, it is cleared when a white pixel is input. It is also cleared by a one-line synchronization signal. When the number of black pixels exceeds a predetermined value, a black pixel continuous signal is generated.

The counter B performs the same operation as the counter A for white pixels.

The counter C is connected to the counter A, and counts the black pixel continuous signal output from the counter A. Counter C is 1
It is also cleared by the line synchronization signal. When the count value becomes equal to or more than a predetermined value, a first signal is output.

The counter D outputs the second signal by the same operation as the counter C.

Based on the first and second signals from the counters C and D, the NAND gate 75 outputs a dot size determination signal, which will be described later with reference to FIG. 13, according to the type of image.

The determination result memory 76 records a value indicating whether the image is a halftone image or a text image for each line based on the output signal from the NAND gate 75. At the time of image output, a dot size determination signal is output for the line currently being recorded by the image output line synchronization signal.

The image mode detection method shown in FIG. 12 distinguishes a halftone image and a text image by the following features.

In a halftone image, black and white pixels are hardly continuous. Generally, when halftone processing is performed by the dither method, a matrix size of at most 8 × 8 is used. For this reason,
If the reproduced image has a high density, the probability of continuous white pixels will be very low, and if the reproduced image has a low density, the probability of continuous black pixels will be very small.

On the other hand, in a text image, black and white images are likely to be continuous. In the case of a character pixel, there is a very high probability that white will continue for a long time unless black and white inversion occurs. In addition, even if it is a character, when an image signal is read at 8 lines / mm, about 4 pixels (0.5 mm) of black pixels continue even in a vertical line, and further black pixels continue in a horizontal line.

The counter C and the counter D generate a signal "1" when the probability of continuous black or white pixels is high. FIG. 13 shows the values of the image type determination and the dot size determination signal based on the output signals from the counters C and D and the output signal from the NAND gate 75 at that time.

In the above embodiment, the type of the image is determined from the probability that the black pixels and the white pixels are continuous as the method of the image mode detection unit. In addition, the following determination method can be considered.

(1) The image mode is determined based on whether the probability that white pixels continue more than a predetermined value is high or low. In the determination method using only one of the embodiments shown in FIG. 12, the accuracy of the determination result is low but the cost is low.

(2) The image mode is determined based on whether the probability that the black pixel continues beyond a predetermined value is high or low. This also has the same characteristics as the above (1).

(3) The above (1) and (2) for a two-dimensional block
Alternatively, the determination shown in FIG. 12 is performed.

(4) The determination may be made for each page instead of for each line.

Figures corresponding to FIGS. 2 and 9 of the above embodiment in this case are shown in FIGS. 14 and 15. Referring to FIG. 14, the image mode detecting section 41 determines the type of image (halftone image or text image) for each page, and the result of the determination is input to the CPU 71. The CPU 71 outputs a dot size switching signal to the recording unit 38 based on the determination result. In this case, since the image mode is detected for each page, after the image mode is detected for each page, the control unit 39 detects the image mode.
, And an image is recorded. The other parts are the same as those of the embodiment shown in FIG. 2, and therefore the same parts are denoted by the same reference numerals and description thereof will be omitted.

FIG. 15 is a flowchart in the case where the image mode is determined for each page. The difference from Fig. 9 is that the internal state
Parts 13 and 14. In step S334, the code memory 34
Is expanded and transferred to the page memory 40,
The image mode is detected by the above-described image mode detection method (S335), and it is determined in step S336 whether or not image expansion has been completed for one page. If not completed, the program returns as it is. In S337, the internal state is updated and the routine returns.

If the internal state is 14, the program proceeds to step S341
Then, it is determined whether the decompressed image is a text image or a halftone image, and a dot size switching signal is output accordingly (S342, S343), and a print command is issued to the recording unit 38 to execute printing (S344). . Then, in step S345, the internal state is updated, and the program returns. The contents other than the above are the same as those described in FIG. 9 and therefore the description thereof is omitted.

In the above embodiment, the detection of the image mode is performed in units of lines or pages. More than this, image determination may be performed in pixel units. Next, an embodiment in that case will be described with reference to FIGS. 16 and 17. FIG. In this embodiment, image discrimination is performed using a pattern of a 3 × 3 pixel matrix, and a result of determining whether the center pixel of the matrix is halftone or binary is obtained. An example of the pattern in this case is shown in FIG. 17. In the case of the halftone, the pixels are appropriately dispersed, and in the case of the character, the pattern is set because the pixels are continuous.

FIG. 16 is a block diagram showing a judgment circuit. Referring to FIG. 16, the image data to be output to the recording unit is input to FIFO1 and also to an F / F (flip-flop), and after being delayed by one pixel by an image clock, the F / F of the next stage is output. The image data for three pixels is input to the address of the ROM in the main scanning direction after being input to F and further delayed by one pixel. The image data input to the FIFO 1 is taken in internally by the image clock, and the previously stored data (data for one line before the line cycle signal is input) is output, so that the image data is input in the sub-scanning direction. The data delayed by one line is taken out. This output outputs data of three pixels by passing through the F / F stage as before.

The FIFO is reset by the line synchronization signal, and the previous data is output at the same time as reading data from the beginning. By passing through the FIFO of one more stage, the main scanning
Pixel data for three pixels × sub-scanning lines is extracted. The data for the nine pixels is input to the ROM, and outputs a determination signal in a dot size according to the pattern. FIG. 17 shows an example of a pattern stored in the ROM. In the pattern shown in (1) of FIG. 17, the pixel is determined to be halftone, and (2)
In such a case, the signal is determined as a text image.

As described above, the center pixel is 2 from 3 × 3 9 pixels.
Whether the value is halftone or halftone is determined, and a dot size determination signal is output for each pixel.

II. Second Embodiment In the first embodiment, the size of the recording dots was changed according to the image mode. In the second embodiment, instead of changing the size of the recording dot, the density of the recording dot is changed.

FIG. 18 corresponds to FIG. 5A of the first embodiment, and is a block diagram of a circuit in which the density of recording dots is switched by controlling the power of a semiconductor laser.
The data to be recorded is read from the page memory 40 by the reading circuit 106 in synchronization with the clock, and is applied to the driver 115. The power of the semiconductor laser 101 is
Limited by At this time, if the switch 102 is turned on by the dot density switching signal, the switching is limited only by the resistor 104, and if the switch 102 is turned off, the switching is limited by the resistors 103 and 104. When the power of the semiconductor laser changes, the potential on the photosensitive drum changes, and the density of dots when developed by the developing device changes.

FIGS. 19 and 20 show circuits for judging image data for each line in the second embodiment. Since these contents are the same as those in FIGS. 12 and 13 described in the first embodiment, the description of the contents will be omitted.

In the second embodiment, the density of the recording dots was switched by controlling the power of the semiconductor laser. Alternatively, the density of the dot size may be switched by, for example, switching the bias voltage during development.

[Effects of the Invention] As described above, according to the present invention, in a facsimile apparatus having a copy mode, recording dots in an image forming unit depend on whether an image is formed based on a received signal or an image based on a read signal from an image reading unit. The size changes. as a result,
There is an effect that a facsimile apparatus having a copy mode capable of faithfully reproducing a received image read on the transmission side can be provided.

[Brief description of the drawings]

FIG. 1 is a schematic cross-sectional view schematically showing a laser facsimile apparatus, FIG. 2 is a block diagram schematically showing the operation of the facsimile, FIG. 3 is a plan view of an operation display unit,
FIG. 4 is a block diagram of a CPU for controlling the facsimile apparatus. FIGS. 5A and 5B are a block diagram and a timing chart of a dot size switching circuit according to the first embodiment of the present invention. Is the CPU that controls the facsimile
7 is a flowchart showing an input / output process, FIG. 8 is a flowchart showing a standby mode, FIG. 9 is a flowchart showing a reception mode, and FIG. 10 is a flowchart showing a copy mode. FIG. 11 is a flowchart showing a management report output mode, and FIGS. 12 and 13 are diagrams showing an image mode detection unit and its output signals, and FIGS.
FIG. 17 is a diagram showing a case where image discrimination is performed in units of pages and pixels, and FIGS. 18 to 20 are diagrams for explaining the operation contents of the facsimile apparatus according to the second embodiment of the present invention. is there. 31 is a photoelectric conversion unit, 32 is a processing unit, 33 is a compression unit, 34 is a code memory, 35 is a transmission control unit, 36 is a line connection unit, 37 is a decompression unit,
38 is a recording unit, 39 is a control unit, 40 is a page memory, 41 is an image mode detection unit, 51 is an operation display unit, 56 is a management report key, 57 is a copy key, 58 is a halftone key, 101 is a semiconductor laser, 106 is a readout circuit, 107 is a triangular wave generation circuit, 109 is AND
The gate. In the drawings, the same reference numerals indicate the same or corresponding parts.

Continuation of the front page (56) References JP-A-62-216475 (JP, A) JP-A-62-91078 (JP, A) JP-A-60-194472 (JP, A) JP-A-54-23535 (JP) JP-A-61-4874 (JP, A) JP-A-63-305671 (JP, A) JP-A-1-258555 (JP, A)

Claims (2)

(57) [Claims] 1. A facsimile apparatus having an image reading unit and an image forming unit, wherein the facsimile machine creates an image by the image forming unit based on a signal received from a communication line and a read signal from the image reading unit. A facsimile apparatus comprising a control unit that changes a recording dot size in the image forming unit depending on whether an image is formed based on a signal or an image based on the read signal. 2. An image forming apparatus according to claim 1, wherein said control means determines whether the received signal is a text image or not in a case of image formation based on said received signal, and further sets a recording dot size in said image forming unit according to a result of the determination. 2. The method according to claim 1, wherein the change is performed.
A facsimile apparatus according to claim 1.