JPH04150160A - Facsimile equipment - Google Patents

Abstract

PURPOSE:To avoid the deterioration in picture quality in the case of reducing a picture by reading the picture with a reduction rate based on the information of a recording paper width of a destination receiver. CONSTITUTION:When the original transmission mode is set, the recording paper width of a destination receiver is recognized and the recording paper width information is stored in a predetermined area of a RAM 3. Then a main scanning reduction rate to match the width of the original to be sent with the recording paper width of the destination receiver. Moreover, in the case of read and transmission of a picture data, the original information is sent in response to the subscanning reduction rate for each read of one main scanning line and the read data of one line is stored in a line memory 6. Thus, the reduction at memory transmission is executed at reading based on preceding recording width information to prevent the deterioration in the picture quality.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a facsimile device.

[Prior Art] Conventionally, facsimile machines have been known that have a memory storage and transmission mode in which an image read from a document is temporarily stored in a memory, and then a facsimile procedure is executed with the other party's machine to transmit the image. There is.

By the way, in general, in memory storage transmission, the printable recording paper width of the other receiver is unknown until a pre-procedure is executed with the other receiver, so when reading the document mentioned above, the width of the printable recording paper is always equal. The method used was to read the image at double magnification, and then reduce the size of the transmitted image as necessary during actual transmission, based on the printable recording paper width of the recipient's receiver.

Next, this operation will be specifically explained.

First, when memory transmission to the other party is instructed from the operation console, the reading section is operated to read the image at the same size, the image data is encoded, and the entire document is temporarily stored in the storage memory. After this, execute a call to the specified party,
Perform the previous steps.

Then, at the point of transmitting the image data to the other party, the image data accumulated in the storage memory is once decoded, reproduced as an original image in the line memory for transmission, and again encoded in a code acceptable to the other party's receiver. Recode and transmit according to the mode.

At this time, if the document width is larger than the recording paper width of the other receiver, the transmitter side performs the reduction process as described above. Scanning is performed by thinning out lines or the like.

[Problems to be Solved by the Invention] However, in the conventional example described in L, an image that has already been binarized and stored in memory is reduced, resulting in image distortion, missing thin lines, etc., and deterioration of image quality. There was an unavoidable drawback.

In addition, especially when a halftone image based on binary data is reduced, the distribution of the binary pixels, which were originally expressed in a pseudo manner, becomes uneven, resulting in moire fringes, vertical fringes, horizontal fringes, etc. This has the disadvantage that image quality deteriorates more significantly due to reduction than with non-gradation images.

The present invention can reduce the image size according to the recording paper width of the destination device during memory storage and transmission.
An object of the present invention is to provide a facsimile device that can avoid deterioration in image quality.

[Means for Solving the Problems] The present invention provides a storage means for storing information regarding the recording paper width of the other receiver, which is obtained from the other receiver during one communication, in a memory in correspondence with telephone number information of the other receiver, and a memory. When transmission is instructed and an image stored in the image memory is read, the image is read at a reduction rate based on the recording paper width information of the destination receiver stored in the memory.

[Function] In the present invention, when performing transmission, information regarding the recording paper width obtained from the other party is stored together with the other party's telephone number information, so that when a memory transmission to the other party is subsequently instructed, Information regarding the width of the recording paper is read out, compared with the width of the document to be read this time, and if necessary, a reduced image is read and stored in the image memory. Thereby, there is no need to perform reduction after binarization, and deterioration in image quality can be avoided.

[Embodiment] FIG. 1 is a block diagram showing a facsimile machine according to an embodiment of the present invention.

This facsimile machine includes a system control unit 1 that controls the operation of this system, a ROM 2 that stores programs executed by the system control unit 1, a RAM 3 that stores data for other parties such as wanta, chikey, etc., and a numeric keypad. , an operation console 4 equipped with input buttons such as one-touch keys and a display, a reading unit 5 that reads a document and outputs binary image data to the system bus, and a line buffer memory that stores image data in pixel data format. 6, an encoding/decoding unit 7 that reads out and encodes the pixel data in the line buffer memory 6, or decodes the encoded data and stores it in the line buffer memory 6, and a large unit that encodes and stores the image data. It has a storage memory 8 with a large capacity, a modem unit 9 that modulates and demodulates line signals, and a network control unit (NCU) 10 that controls connection to the line.

The operation of this embodiment will be explained below.

FIG. 2 is a flowchart showing the operation in document transmission mode.

First, in this document transmission, the telephone number of the recipient is instructed (Sl) using the one-touch keys provided on the console 4, and when the start of the document transmission mode is instructed (S2), the NCUlo A calling operation is performed to the corresponding party (S3).

The next time a call is established with the other party's facsimile machine, the CC
A pre-procedure according to ITT Recommendation T, 30 is performed (S4)
. At this time, this facsimile machine can know the recording paper width of the other party's receiver, so if the called party is registered in the facsimile machine's Wanta 2,000 dial 1 speed dial, etc. Paper width information, R
It is stored in a predetermined area within AMa (S5).

Furthermore, in order to match the width of the document to be transmitted to the recording paper width of the destination receiver, a main scanning reduction rate is specified to the reading unit 5 (S6).

When reading and transmitting image data, each time one main scanning line is read, the reading unit 5 feeds the document according to the sub-scanning reduction ratio, and the read data of one line is stored in the line memory 6 (S7 ).

On the other hand, the encoder/decoder 7 operates as an encoder at this time, reads out the read image data line from the line memory 6, and performs encoding processing (S8).

The encoded data is modulated by the modem 9 and sent to the NC
It is sent to the line by the UIO (S9).

When all the originals have been sent as described above (S
10) The post-procedure is executed and the communication ends (
S11).

Next, FIG. 3 is a flowchart showing the operation in the memory storage transmission mode.

In this memory storage transmission, after inputting the destination phone number (521) and instructing the start of memory storage transmission (S
22) Prior to reading the image, it is determined whether the currently specified destination is registered in one-touch dialing, speed dialing, etc. (S23). If it is registered, refer to the recipient's recording paper width information obtained during the previous transmission to that destination (S24).
, if reduction is required, reading is performed according to the reduction rate, encoded, and stored in the storage memory 8 (S25).

Note that if the destination is not registered in S23 or if reduction is not required in S24, the image is read at the same size, encoded, and stored in the storage memory 8 (S26).

Then, after the storage path Y of all images, a calling operation is performed (S27
), the pre-procedure is performed (S28).

Next, when transmitting an image, one line of data is read out from the storage memory 8, decoded, and reproduced as an original image in the line memory 6 (S29), and then encoded again according to the encoding mode allowed by the recipient receiver. and send it (≦30
~533).

In this way, even in the memory storage transmission of this embodiment, as explained in the conventional example above, encoding and re-encoding processing is required to match the encoding mode to the destination receiver when transmitting an image. However, in this embodiment, reduction can be performed before the read image signal is binarized, and deterioration in image quality can be prevented.

During the above re-encoding, if the destination is unregistered (S23) or the function of the recipient's receiver has changed, etc., the data will be reduced as necessary and transmitted as before. I will do it.

In this way, it is possible that the recording paper width of the other party's receiver differs between the previous transmission and the current transmission, but this only happens on rare occasions, and in most cases it is due to image reduction. The effect of the present invention of avoiding deterioration in image quality can be fully achieved.

When all the originals have been sent as described above (S
34), the post-procedure is executed and the communication ends (S3
5).

FIG. 4 is a schematic diagram showing registration areas provided in the RAM 3 corresponding to the one-touch dials on the console 4.

As shown in the figure, the recording paper width and telephone number of the other party are stored for each want and dial. Note that a similar configuration is also provided for speed dialing.

Figure 85 shows image data processing from document reading to transmission, including document transmission (a), conventional memory transmission (b),
FIG. 7 is a schematic diagram separately explaining memory transmission (C) of the present embodiment.

(a) Analog read data read by a reading device such as a document transmission COD has pixel data thinned out at predetermined intervals according to the reduction rate.

In the binarization process, analog data already obtained by the reduction method is binarized according to the brightness difference between the pixel of interest and surrounding pixels.

The binary data is encoded and temporarily stored in a transmitter buffer defined in the RAM 3, and the modem sequentially reads the encoded data from the transmitter buffer 7 and sends it to the line.

(b) Conventional memory transmission As mentioned above, up to the storage memory are treated as same-size pixels,
When transmitting from storage memory, decoding → reduction → re-encoding is performed.

(C) Memory transmission of this embodiment Depending on the recording paper width of the destination receiver obtained during previous transmission, M
When storing the data in the product memory, it is reduced in size in the same way as when transmitting the original, and when transmitting the data, decoding and re-encoding are performed.

However, at this time, if the recording paper width of the other party's receiver is smaller than the previous transmission and reduction is required, as in the conventional example, as shown in the flowchart above, decoding → reduction →
Perform re-encoding.

Note that when sending for the first time to a destination registered for one-touch, shortcut, etc., the recording paper width is set to A4 as the default value.
It may be a width or may be unlimited.

In addition, although the above embodiment has been explained only when sending a memory message to a destination registered in one-touch, shortcut, etc., even when directly specifying the destination phone number using the numeric keypad, seven calls The effect of the present invention can be obtained by recording the number and recording paper width, and when a destination telephone number is directly input and there is a matching destination in this past communication information, the recording paper width is referred to. be able to.

Additionally, when a transmission is instructed, a message indicating that the document will be reduced based on the document width and the recipient's recording paper width may be displayed on a display to inform the operator that it cannot be sent at the same size. good.

Furthermore, when sending a circular, reading can be performed at a reduction rate that matches the minimum recording paper width of the recipient of the circular.

Furthermore, when outputting a report of registered data such as one-touch or shortcut, the operator can be alerted by printing the recording paper width of the other party along with the registered telephone number.

[Effects of the Invention] As described above, according to the present invention, reduction during memory transmission can be performed during reading based on the previous recording paper width information, thereby eliminating data loss due to thinning of image data. This has the effect of preventing deterioration of image quality.

Particularly, for halftone images, since the image data can be reduced in the form of analog signals, a remarkable effect can be obtained that does not result in an unnatural reduced image.

Furthermore, the amount of image data itself is reduced at the time of reading, which contributes to improving the usage efficiency of the image memory.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing a facsimile machine according to an embodiment of the present invention. FIG. 2 is a flowchart showing the operation in the document transmission mode in the same embodiment. FIG. 3 is a flowchart showing the operation of the memory storage transmission mode in the same embodiment. FIG. 4 is a schematic diagram showing a registration area provided in the RAM corresponding to the one-touch dial on the console in the same embodiment. FIGS. 5(a) to 5(c) are schematic diagrams illustrating image data processing from document reading to transmission, divided into document transmission, memory transmission in the conventional example, and memory transmission in the above embodiment. . DESCRIPTION OF SYMBOLS 1...System control part, 4...Operation console, 5...Reading part, 6...Line memory, 7...Encoding/decoding part, 8...Storage memory, 9...Modem , 10...NCU. Patent applicant: Gyanon Co., Ltd. Agent: Arata Yokubo Figure 1 Figure 2 Figure 3

Claims (1)

[Scope of Claims] A storage means for storing in a memory information regarding the recording paper width of the other party's receiver obtained from the other party's receiver during communication in correspondence with telephone number information of the other party's receiver; and memory transmission is instructed; A facsimile apparatus characterized in that when reading an image stored in an image memory, the image is read at a reduction rate based on information about the recording paper width of a destination receiver stored in the memory.