JPH0918696A - Facsimile terminal - Google Patents

Abstract

PURPOSE: To provide a facsimile terminal in which the processing efficiency is not deteriorated by reading the image of a transmission original with a resolution matching a resolution of the printer of a receiver side equipment and sending the resulting data. CONSTITUTION: In the case of a receiver side, as a nonstandard function of the facsimile equipment, the opposite party has a printer resolution notice function notifying a resolution X of a printer 10 of its own equipment. In the case of a transmitter side, the transmitter has a transmission image resolution notice function informing the resolution Y of a transmission image when an opposite station has a printer resolution notice function. An NSF signal sent from the receiver facsimile terminal is a signal having facsimile control fields a, b, c, d of 4-octet and the information of the resolution X of its own printer is recognized by the code. On the other hand, the transmitter side sends setting information of the resolution Y of the transmission image by the transmission code. The transmission signal with the resolution suitable for the printer performance of the receiver facsimile equipment is sent by using both functions.

Description

Detailed Description of the Invention

[0001]

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

[0002]

2. Description of the Related Art In a general facsimile apparatus equipped with a document reading section for optically reading a screen of a transmission document and a printer for printing out a received image on a recording sheet, the image of the transmission document is decomposed into pixels. The so-called scanning line density at the time of so-called transmission scanning and the so-called scanning line density at the time of so-called receiving scanning for assembling pixels sent by an electric signal to reproduce a transmission image are 3.85 lines / mm, 7.7 lines. / Mm, 15.4 lines / mm
Are standardized to the values such as.

On the other hand, recently, there is provided an interface capable of connecting a computer or the like online, so that an image created by the computer or the like can be input through this interface and the image can be printed out on a recording paper by a printer. A facsimile machine with a printer function has been commercialized.

By the way, as a printer connected to a computer, a page printer is currently the mainstream, and the page printer generally determines the resolution in inches. Therefore, in the above-described facsimile apparatus with a printer function, in order to print out an image created by a computer or the like with high quality, the unit of inch unit higher than the scanning line density standardized in the transmission scanning and the reception scanning is used. Resolution (for example, 400 dpi, 600 dpi)
Etc.) are generally used.

[0005]

However, even if the resolution of the printer is increased so that an image created by a computer or the like can be printed out with high quality, the resolution of the image received by facsimile from the other station is determined by transmission scanning and Since the resolution of the scanning line density standardized in the reception scanning is lowered, the resolution of the printer is not effectively utilized. In addition, this type of facsimile device can input an image created by a computer or the like as bit image data and send it by facsimile to another facsimile device. In this case, the resolution of the image input from the computer or the like is standardized. Even if the receiving side device is a facsimile device having a high resolution printer, the pixels are decimated to reduce the resolution corresponding to the scanning line density, and then the facsimile transmission is performed.
After all, I was not able to make full use of the resolution of the printer.

Although it is possible to print the image received by facsimile with high resolution by increasing the scanning line density in the sending scan and the receiving scan above the standard value, the printer included in the receiving side facsimile apparatus can If the resolution is not high, it is meaningless to increase the scanning line density, and the processing efficiency only decreases.

The present invention has been made under such circumstances, and an object of the present invention is to always be able to perform facsimile transmission of an image having a resolution suitable for the resolution of the printer of the facsimile receiving side device, and to process it. It is an object of the present invention to provide a facsimile apparatus that can effectively utilize the resolution of the printer of the facsimile receiving apparatus without lowering the efficiency.

[0008]

According to the first aspect of the present invention, a line to a destination station designated as a destination is connected, and an image of a transmission original read by a document reading unit according to a facsimile transmission control procedure is transmitted to the other side. In a facsimile apparatus for transmitting to a station, the resolution of the printer of the partner station is detected by a predetermined information signal received from the partner station in the preprocessing process of the facsimile transmission control procedure, and the partner station has this resolution means. When the resolution of the printer is detected, the reading control means for controlling the image reading of the transmission original by the original reading unit is provided according to the resolution.

Further, the invention according to claim 2 of the present application is a facsimile apparatus for connecting a line to a partner station designated as a destination and transmitting a transmission image input by the image input means to the partner station according to a facsimile transmission control procedure. In the above, when the resolution of the printer owned by the partner station is detected by a predetermined information signal received from the partner station in the pre-process of the facsimile transmission control procedure, and the resolution of the printer owned by the partner station is detected by this detection means. A resolution comparing unit that compares the resolution of the transmission image input by the image input unit, and if the resolution of the printer of the other station is lower than the resolution of the transmission image by this comparison unit, the resolution of the transmission image of the printer of the other station After matching the resolution,
When the resolution of the printer owned by the partner station is equal to or higher than the resolution of the transmitted image by the first transmission control means for transmitting the transmitted image after the resolution change to the partner station, the transmitted image is not changed. Second to send to the other station
And a transmission control means of the above.

[0010]

In the facsimile apparatus according to the first aspect of the present invention, at the time of facsimile transmission, after the line with the partner station designated as the destination is connected, the transmission original read by the original reading unit according to the facsimile transmission control procedure is transmitted. Send image data to the partner station. In this case, when the resolution of the printer of the partner station is detected by the predetermined information signal received from the partner station in the pre-processing process of the facsimile transmission control procedure, the image of the transmitted document is read by the document reading unit in accordance with this resolution. Control. Therefore, since the image of the transmission original read according to the resolution of the printer of the partner station is transmitted from the facsimile device, the partner station can receive the received image at the resolution of the printer without changing the resolution of the received image. It can be printed out.

Further, in the facsimile apparatus of the invention corresponding to claim 2 of the present application, at the time of facsimile transmission, after the line with the partner station designated as the transmission destination is connected, the transmission input by the image input means according to the facsimile transmission control procedure. Send the image to the other station. In this case, when the resolution of the printer owned by the partner station is detected by the predetermined information signal received from the partner station in the pre-process of the facsimile transmission control procedure, the resolution of the printer owned by the partner station and the transmission input by the image input means. Compare with image resolution.
If the resolution of the printer of the partner station is lower than the resolution of the transmitted image, the resolution of the transmitted image is changed to match the resolution of the printer of the partner station, and then the transmitted image after this resolution change is transmitted to the partner station. Send. On the other hand, when the resolution of the printer of the partner station is equal to or higher than the resolution of the transmission image, the transmission image is transmitted to the partner station without changing the resolution of the transmission image. Therefore, if the resolution of the printer of the partner station is equal to or higher than the resolution of the transmitted image, the facsimile machine transmits the transmitted image as it is, and the resolution of the printer of the partner station is lower than the resolution of the transmitted image. In this case, the transmission image is transmitted with the resolution lowered to the resolution of the printer of the partner station, so the partner station should print the received image at the resolution of the printer without changing the resolution of the received image. You can

[0012]

An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram of a facsimile apparatus according to this embodiment. That is, this facsimile apparatus is equipped with the modem 2 connected to the telephone line 1. Also, a CPU (central processing unit) is used as the control unit main body.
3, a ROM (read only memory) 4 and a RAM as main storage units controlled by the CPU 3
(Random access memory) 5 is installed. Fixed data such as a program for controlling the CPU 3 is stored in the ROM 4 in advance. In addition, the RAM5
In the memory, various memory areas for temporarily storing various data are formed.

Further, this facsimile apparatus has a reading control for controlling the driving of a clock section 6 for measuring the date and time, a data compression / expansion circuit 7 for compressing and expanding image data, and an original reading section 8 for optically reading a transmission original. Section 9, printer control section 1 for controlling drive of printer 10 for printing on recording paper
1. Sending and receiving signals to and from the operation panel 12 provided with keys and a display for inputting the telephone number of the facsimile destination I
An interface 16 for removably connecting a computer 15 such as a personal computer through an / O port 13 and an interface cable 14 is mounted.
Then, the CPU 3, the modem 2, the ROM 4 and the RAM
5, clock unit 6, data compression / expansion circuit 7, read control unit 9,
The printer control unit 11, the I / O port 13, and the interface 16 are connected by a bus line 17 such as an address bus and a data bus.

Therefore, the facsimile apparatus having such a structure reproduces the original image based on the image data received from the partner station through the telephone line 1 according to the facsimile transmission control procedure, and prints out on the recording paper by the printer 10. Facsimile reception processing and document reading unit 8
A FAX (facsimile) mode for performing a facsimile transmission process of transmitting an image of a transmission original read in step 1 to a partner station through the telephone line 1 according to a facsimile transmission control procedure;
An image created by the computer 15 is input to the interface 16 via the cable 14, and the online mode for selectively transmitting the image data to the partner station through the telephone line 1 according to the facsimile transmission control procedure is executed. The operation panel 12 is provided with a mode selector switch 18 for selectively switching between the FAX mode and the online mode.

Here, the outline of the facsimile transmission control procedure will be described with reference to the signal sequence diagram of FIG. That is, when the receiving facsimile machine responds to the call from the transmitting facsimile machine and the line is connected, first, as a preprocessing step for confirming the status of the partner station and the transmission line, the receiving facsimile machine makes a digital identification. Signal (hereinafter,
DIS signal), called terminal identification signal (hereinafter C
SI signal), non-standard function identification signal (hereinafter N)
An SF signal is abbreviated, and in response to this, a digital command signal (hereinafter referred to as DCS) is sent from the sending facsimile machine.
A signal), a transmission terminal identification signal (hereinafter abbreviated as TSI signal), and a non-standard function setting signal (hereinafter abbreviated as NSS signal). Next, a training check signal (hereinafter abbreviated as TCF signal) is transmitted from the transmission side facsimile machine, and a reception preparation confirmation signal (hereinafter abbreviated as CFR signal) is transmitted from the reception side facsimile machine if image data communication is possible. Send.

Then, the image data is transmitted from the facsimile machine on the transmitting side. Then, when the transmission of the image data is completed, a procedure end signal (hereinafter abbreviated as an EOP signal) is transmitted from the transmitting side facsimile device. In response to this, the receiving side facsimile apparatus transmits a message confirmation signal (hereinafter, abbreviated as MCF signal), and the transmitting side facsimile apparatus transmits a disconnection command signal (hereinafter, DCN signal is transmitted) to connect the line. Disconnect. This completes one facsimile transmission / reception sequence.

As a non-standard function, such a facsimile apparatus has a printer resolution notifying function for notifying the other party of the resolution X of the printer 10 of its own when it is a receiving side facsimile apparatus. Further, the transmission side facsimile apparatus has a transmission image resolution notifying function for notifying the resolution Y of the transmission image when the partner station has the printer resolution notifying function.

Specifically, as shown in FIG. 3A, the NSF signal transmitted from the facsimile machine on the receiving side is a facsimile control field (hereinafter abbreviated as FIF) a, b, c, of at least 4 octets, as shown in FIG. The first FIFa indicates the country code, the next FIFb indicates the manufacturer code, the next FIFc indicates the classification of the non-standard function, and the next FIFd indicates the specific content of the non-standard function. Is shown. Then, particularly when FIFc is [00] H, it is shown that the next FIFd is the information of the resolution X of the printer 10 of the own machine, for example, F
If the first bit b1 of the 8 bits forming the IFd is "1", it is possible to print at a resolution of 200 dpi, and if the second bit b2 is "1", it is possible to print at a resolution of 400 dpi, then the third bit. If b3 is "1", resolution 6
It is assumed that printing is possible at 00 dpi. The other bits of FIFd are reserved and are fixed to "0". That is, if the printer 10 of the printer itself can print at a resolution of 600 dpi, the FIFd is [07] H = [00000
111] 2, the FIFd is [03] H = [00000011] 2 when printing is possible at a resolution of 400 dpi, and the FIFd is [01] H = [00000001] 2 when printing is possible at a resolution of 200 dpi.

On the other hand, the NSS signal transmitted from the transmitting side facsimile machine upon receiving the NSF signal is also the NSF signal.
Similar to the signal, it is a signal having at least 4 octets of FIFa, b, c, d as shown in FIG.
The first FIFa indicates the country code, and the second FIFb indicates the manufacturer code. Further, the classification of the non-standard functions set by the next FIFc is shown, and the specific content of the non-standard functions is shown by the next FIFd. Then, in this embodiment, when the FIFc is [00] H, the next FIF
d indicates the setting information of the resolution Y of the transmission image. If the first bit b1 of the 8 bits forming the FIFd is "1", it indicates that the image of 200 dpi resolution is transmitted, and the second bit b2 is "1". If the third bit b3 is "1", it means that the image having the resolution of 400 dpi is transmitted, and if the third bit b3 is "1", the image having the resolution of 600 dpi is transmitted. The other bits of FIFd are reserved and are fixed to "0". That is, when transmitting an image with a resolution of 200 dpi, the FIFd is [01] H = [0000000
1] 2, the FIFd is [02] H = [00000010] 2 when transmitting an image with a resolution of 400 dpi, and FId when transmitting an image with a resolution of 600 dpi.
Fd is [04] H = [00000100] 2.

However, the CPU 3 is programmed to execute the processing shown in the flow charts of FIGS. 4 and 5 when the FAX mode is selected by the mode changeover switch 18. That is, as shown in FIG. 4, the CPU 3 determines whether or not there is an incoming call in ST (step) 1, and if there is no incoming call, determines whether or not there is an outgoing call in ST2. Then, if no call is made, the process returns to ST1.

When it is detected in ST1 that there is an incoming call from the partner station (corresponding to the facsimile apparatus on the transmitting side in FIG. 2) via the modem 2, the facsimile receiving process concretely shown in FIG. 4 is started. That is, first, the DIS signal, the CIS signal, and the NSF signal are transmitted to the partner station via the modem 2. In this case, the CPU 3 sets the resolution X of the printer 10 of the own machine preset in the RAM 5 or the like as ST3.
Is embedded in the NSF signal and transmitted.

Next, the signal from the partner station is awaited and ST4
When the NSS signal is received together with the DCS signal and the TSI signal, the NSS signal is analyzed and the transmission image resolution Y
It is determined whether or not the setting information of is included. If ST5 includes the setting information of the transmission image resolution Y, ST5
The training check is performed as 6, and when the preparation for reception is completed, the CFR signal is transmitted.

After that, when the image data is received through the modem 2 in ST7, the image data received by the data compression / expansion circuit 7 is expanded, and in ST8, the resolution X of the printer 10 and the transmission image of the own printer are stored. Compare with resolution Y. If they match, S
As T9, the pixels are assembled from the expanded image data without changing the resolution to reproduce the transmission image, and the transmission image is printed out on the recording paper by the printer 10.

On the other hand, if the resolution Y of the transmitted image does not match the resolution X of the printer in ST8, the pixels are thinned (X <Y) or supplemented from the image data expanded to match the resolution X of the printer in ST10. While performing (X> Y), the pixels are assembled to reproduce the transmission image, and the transmission image is printed out on the recording paper by the printer 10.
This completes one sequence of facsimile reception processing.

If the NSS signal is not received in ST4 or the NSS signal received in ST5 does not include the setting information of the resolution Y, the other station is a facsimile apparatus having no transmission image resolution notification function. A conventionally known facsimile reception process is executed.

Further, in ST2, when it is detected that there is a call to the other station (corresponding to the facsimile machine on the receiving side in FIG. 2) by the key input from the operation panel 12, the facsimile transmission process concretely shown in FIG. 5 is started. To do. That is, first, S
As T11, the destination station of the facsimile transmission destination is called via the modem 2. If it is confirmed in ST12 that the line with the partner station has been connected within the predetermined time, ST12
When the NSF signal from the partner station is awaited as 13 and the NSF signal is received together with the DIS signal and the CSI signal, the NSF signal is analyzed to determine whether or not the notification information of the printer resolution X is included. When the notification information of the printer resolution X is included in ST14, the printer resolution X is detected (resolution detecting means).

Next, in ST15, it is determined whether or not the document reading unit 8 can read the image of the transmission document at the printer resolution X. Note that resolution information of an image that can be read by the document reading unit 8 is preset in the ROM 4 or the RAM 5, and the determination is made by collating with the setting information. If it is readable, the printer resolution X is determined as the resolution Y of the transmitted image in ST16. On the other hand, if the image cannot be read, the readable resolution closest to the printer resolution X is determined as the resolution Y of the transmitted image in ST17. And ST18
NS which incorporates the setting information of this transmission image resolution Y as
The S signal is transmitted to the partner station together with the DCS signal and the TSI signal.

Next, when the training check is completed in ST19, the reading control section 9 is controlled in ST20 to read the image of the transmission original set in the original reading section 8 at the resolution Y determined in ST16 or ST17. (Reading control means). Thereafter, in ST21, the image of the transmission original is decomposed into pixels without changing the resolution, compressed by the data compression / expansion circuit 7, and then transmitted as image data to the partner station via the modem 2. Then, after the transmission of the image data is completed, the EOP signal is transmitted, and if the MCF signal is received, the DCN signal is transmitted in ST22 to disconnect the line. This completes one sequence of facsimile transmission processing.

After calling the partner station in ST11,
In ST23, if there is no response from the partner station within a predetermined time and the line is not connected, a line connection error occurs, and this process ends. Further, if the NSF signal is not received in ST13 or the notification information of the printer resolution X is not included in the NSF signal received in ST14, the partner station is a facsimile machine having no printer resolution notification function. A known facsimile transmission process is executed.

On the other hand, the CPU 3 is programmed so as to execute the processing shown in the flowchart of FIG. 6 when the online mode is selected by the mode changeover switch 18. That is, the CPU 3 determines ST31.
When the computer 15 connected to the interface 16 by the cable 14 waits for data input, and the computer 15 inputs bit image data of an image to be facsimile-transmitted, dial data for designating a facsimile destination, etc., the facsimile is performed as ST32. Call the destination station. Then, if it is confirmed in ST33 that the line with the partner station is connected within the predetermined time, in ST34, the NSF signal from the partner station is awaited,
When the NSF signal is received together with the DIS signal and the CSI signal, the NSF signal is analyzed to determine whether the notification information of the printer resolution X is included. When the notification information of the printer resolution X is included in ST35, the printer resolution X is detected (resolution detection means).

Next, at ST36, the printer resolution X is compared with the image resolution Y1 input from the computer 15 (resolution comparing means). The resolution Y1 of the image input from the computer is registered in the RAM 5 in advance by the user based on the specifications of the computer.

When the printer resolution X is lower than the input image resolution Y1, the printer resolution X is determined as the transmission image resolution Y in ST37, and the NSS signal incorporating the setting information of the transmission image resolution Y is incorporated. And D
It is transmitted to the partner station together with the CS signal and the TSI signal. Next, if the training check is completed, ST3
The pixel Y is thinned out to change the resolution Y1 of the input image to the transmission image resolution Y and compressed by the data compression / expansion circuit 7, and then transmitted as image data to the partner station via the modem 2. After that, when the EOP signal is transmitted and the MCF signal is received, the DCN signal is transmitted in ST39 to disconnect the line (first transmission control means).

On the other hand, when the printer resolution X is equal to or higher than the resolution Y1 of the input image in ST36, the resolution Y1 of the input image is determined as the resolution Y of the transmission image in ST40, and the setting information of the transmission image resolution Y is combined. Intricate NSS
The signal is transmitted to the partner station together with the DCS signal and the TSI signal. Next, when the training check is completed, the bit image data of this input image is compressed by the data compression / expansion circuit 7 without changing the resolution in ST41, and then transmitted as image data to the other station via the modem 2. After that, when the EOP signal is transmitted and the MCF signal is received, the DCN signal is transmitted in ST42 to disconnect the line (second transmission control means). Note that ST
After calling the partner station at 33, if there is no response from the partner station within a predetermined time and the line is not connected, a line connection error occurs and this process ends.

In the case of performing facsimile communication between the facsimile apparatuses of the present embodiment thus configured, when the transmitting side facsimile apparatus calls the receiving side facsimile apparatus in the FAX mode and the line is connected, the receiving side is connected. The facsimile machine has a printer 1 that it has.
The resolution X of 0 is used as the non-standard function information to notify the transmitting side facsimile apparatus using the NSF signal.

Now, assuming that the resolution X of the printer of the receiving side facsimile device is 600 dpi, the receiving side facsimile device has a third octet FIFc of [0
0] H, the FIFd of the 4th octet is [07] H =
The [00000011] 2 NSF signal is transmitted to the transmitting side facsimile apparatus.

On the other hand, in the facsimile apparatus on the transmitting side which has received the NSF signal, the NSF signal is analyzed to detect the resolution X of the printer of the facsimile apparatus on the receiving side, and the image of the transmission original is formed at the resolution X of the printer. Determine whether it is possible to send. When it is confirmed that the image can be transmitted, the resolution Y of the image of the transmission original is set to the resolution X of the printer, and the setting information of the transmission image resolution Y = X is used as the non-standard function setting information by using the NSS signal. Send to a fax machine.

Now, the resolution X of the printer of the facsimile machine on the receiving side is 600 dpi, and the printer itself has a resolution of 60 dpi.
Assuming that an image of 0 dpi can be transmitted, the transmission image resolution Y is determined to be 600 dpi. Then, the transmitting side facsimile apparatus has the third octet FIFc of [00] H.
, The fourth octet FIFd is [04] H = [0
0000100] 2 NSS signal is transmitted to the facsimile apparatus on the receiving side.

When the transmission image resolution Y is determined, the transmission side facsimile device controls the driving of the document reading portion 8 so that the image of the transmission document is read with this resolution Y. Specifically, the document reading unit 8 activates the scanner at a predetermined reading interval while moving the document or the scanner at a predetermined speed along the sub-scanning direction of the transmission document and outputs image data of one line in the main scanning direction. Since the image is read, when the moving speed in the sub-scanning direction is constant, the reading interval of the scanner is variably controlled to obtain an image with a desired resolution Y. Alternatively, when the reading interval of the scanner is constant, the moving speed in the sub-scanning direction is variably controlled to obtain an image with a desired resolution Y.

The following table shows the correspondence between the scanner reading interval and the resolution (scan line density) when the moving speed in the sub-scanning direction is constant at 0.1 m / s.

[0040]

[Table 1]

That is, when controlling the image reading of a transmission original at a resolution of 600 dpi, the original reading unit 8 is set so that the scanner is activated once every 0.423 ms to read the image data of one line in the main scanning direction. Control. By doing so, the image of the transmission original can be read at a resolution of 600 dpi.

In this way, if the image of the transmission original is read at the resolution X of the printer 10 of the reception facsimile, the transmission facsimile transmits the image of the transmission original to the reception facsimile according to the normal facsimile transmission control procedure. To do. On the other hand, in the receiving side facsimile apparatus, when the image data of the transmission original is received, since this image data is the image data of the resolution that matches the resolution X of the printer 10 of the own machine, the image data is expanded without changing the resolution, The data is output to the printer 10 and printed out on recording paper.

As described above, according to the present embodiment, the transmission side facsimile apparatus detects the resolution of the printer 10 of the reception side facsimile apparatus, reads the image of the transmission original with the resolution, and transmits by facsimile. Therefore, in the receiving side facsimile apparatus, the received image can be printed out with the resolution of the printer 10 without changing the resolution of the received image.

Therefore, when the sending facsimile machine can read the image of the transmission original at a resolution of, for example, 600 dpi, if the printer of the receiving facsimile machine has a high resolution of 600 dpi, this receiving Since the reproduced image of the transmitted original can be printed out at a high resolution of 600 dpi in the facsimile apparatus on the side, the resolution of the printer of the facsimile apparatus on the receiving side can be effectively utilized.

Also, when transmitting image data from the computer 15 to which the sending facsimile machine is online connected to the receiving facsimile machine, the sending facsimile machine calls the receiving facsimile machine in the online mode and the line is connected. Then, the receiving-side facsimile device notifies the transmitting-side facsimile device of the resolution X of the printer 10 of the receiving-side device by using the NSF signal as the non-standard function information.

On the other hand, in the transmitting side facsimile apparatus which has received the NSF signal, the NSF signal is analyzed to detect the resolution X of the printer of the receiving side facsimile apparatus, and the resolution Y of the image input from the computer 15 is detected.
Compare with 1. When the printer resolution X is lower than the input image resolution Y1, the printer resolution X is determined as the transmission image resolution Y, and the transmission image resolution Y =
The setting information of X is transmitted to the receiving side facsimile apparatus by using the NSS signal as the non-standard function setting information. After that, when the resolution Y1 of the input image is changed to the transmission image resolution Y, the transmitting side facsimile device transmits the image data from the computer 15 to the receiving side facsimile device according to a normal facsimile transmission control procedure. As a result, in the receiving-side facsimile apparatus, the received image is data having a resolution that matches the resolution X of the printer 10 of its own machine, so it is expanded without changing the resolution, output to the printer 10, and printed out on recording paper. To do.

If the resolution X of the printer 10 of the receiving side facsimile device and the resolution Y1 of the image input from the computer 15 are equal, the transmitting side facsimile device facsimiles without changing the resolution of the input image. Send. Even in this case, in the receiving side facsimile apparatus, since the received image is the data of the resolution that matches the resolution X of the printer 10 of the own machine, the received image is expanded without changing the resolution and the printer 10
Output to and print out on recording paper.

Even when the resolution Y1 of the image input from the computer 15 is higher than the resolution X of the printer 10 of the receiving side facsimile apparatus, the resolution of the input image should be changed in the transmitting side facsimile apparatus. Send without fax. In this case, in the receiving side facsimile apparatus, since the received image is data having a resolution higher than the resolution X of the printer 10 of the own apparatus,
The resolution is reduced to the printer resolution X and expanded by thinning out the pixels, and the result is output to the printer 10 and printed out on recording paper.

As described above, according to this embodiment, the resolution of the printer is detected by the resolution of the printer 10 of the reception-side facsimile apparatus in the transmission-side facsimile apparatus and compared with the resolution of the input image from the computer 15. If the resolution of the input image is lower than the resolution of the input image, the resolution of the input image is changed to the printer resolution and then sent to the facsimile machine on the receiving side. If the resolution of the printer is equal to or higher than the resolution of the input image, the resolution of the input image is changed. Since the image data is transmitted to the receiving facsimile device, the receiving facsimile device can always print out the received image with the resolution of the printer 10.

Therefore, when the resolution of the printer of the receiving side facsimile device is a high resolution of, for example, 600 dpi, the receiving side facsimile device sends an image input from the computer 15 to the transmitting side facsimile device at 600 dpi. Since it can be printed out at a high resolution, the resolving power of the printer of the receiving side facsimile device can be effectively utilized.

Moreover, if the resolution of the printer of the facsimile apparatus on the receiving side is equal to the resolution of the image input from the computer 15, the image can be transmitted and received without changing the resolution on the transmitting side and the receiving side. ,
The processing efficiency is significantly improved compared to the conventional one.

Further, the scanning line density during the transmission / reception scanning is 1
For a 5.4 line / mm facsimile machine, the resolution is 40
Although it is almost equal to 0 dpi, since the base of millimeter unit is different from that of inch unit, conventionally, an image may be distorted due to resolution conversion. On the other hand, in the present embodiment, even if the scanning line density is 15.4 lines / mm, if the receiving side facsimile device has a printer of 400 dpi, the image is read at 400 dpi, so the resolution is converted. Image distortion can be reliably prevented.

The present invention is not limited to the above-mentioned embodiments, and it goes without saying that various modifications can be made without departing from the spirit of the present invention.

[0054]

As described in detail above, according to the invention according to claim 1 of the present application, the image of the transmission original can be read and transmitted at a resolution that matches the resolution of the printer of the facsimile receiving side device. Provided is a facsimile device capable of effectively utilizing the resolution of the printer of the facsimile reception side device without lowering efficiency, and capable of transmitting a delicate image in accordance with the high resolution of the printer of the facsimile reception side device. can do.

According to the invention according to claim 2 of the present application,
Since an image from a computer connected online can be transmitted at a resolution that matches the resolution of the printer of the facsimile reception side device, the resolution of the printer of the facsimile reception side device can be effectively utilized, and the facsimile reception side device can be effectively used. If the resolution of the printer included in the printer is high, it is possible to provide a facsimile apparatus capable of transmitting a delicate image accordingly.

[Brief description of the drawings]

FIG. 1 is a block configuration diagram of a facsimile apparatus that is an embodiment of the present invention.

FIG. 2 is a diagram showing a signal sequence of a facsimile transmission control procedure used in the embodiment.

FIG. 3 is a diagram showing formats of an NSF signal and an NSS signal shown in FIG.

FIG. 4 is a flowchart specifically showing a facsimile reception process executed by the CPU of the facsimile apparatus of the embodiment.

FIG. 5 is a flowchart specifically showing a facsimile transmission process executed by the CPU.

FIG. 6 is a flowchart specifically showing an online mode process executed by the CPU.

[Explanation of symbols]

 1 ... Telephone line 2 ... Modem 3 ... CPU 8 ... Original reading unit 10 ... Printer 12 ... Operation panel 15 ... Computer 16 ... Interface

Claims (2)

[Claims] 1. A facsimile apparatus for connecting a line to a destination station designated as a destination and transmitting an image of a transmission document read by a document reading unit to the destination station according to a facsimile transmission control procedure, wherein the destination station is Resolution detecting means for detecting the resolution of the printer possessed by the predetermined information signal received from the partner station in the pre-processing step of the facsimile transmission control procedure, and the resolution when the resolution of the printer possessed by the partner station is detected by this detecting means. And a reading control unit for controlling the image reading of the transmission original by the original reading unit. 2. In a facsimile apparatus for connecting a line to a destination station designated as a destination and transmitting a transmission image input by an image input means to the destination station according to a facsimile transmission control procedure, a printer included in the destination station. Resolution detecting means for detecting the resolution of the printer according to a predetermined information signal received from the partner station in the preprocessing of the facsimile transmission control procedure, and the image input means when the resolution of the printer of the partner station is detected by this detecting means. The resolution comparing means for comparing the resolution of the transmitted image input by the above, and if the resolution of the printer owned by the partner station is lower than the resolution of the transmitted image by the comparing means, the resolution is matched with the resolution of the printer owned by the partner station. After changing the resolution of the sent image, send the sent image after changing the resolution to the partner station And a second transmission control means for transmitting the transmission image to the partner station without changing the resolution when the resolution of the printer of the partner station is equal to or higher than the resolution of the transmission image by the comparison means. And a transmission control means of the facsimile machine.