JPH0563961A - Transmission method in facsimile equipment - Google Patents

Abstract

(57) [Summary] [Object] The present invention relates to a transmission method in a facsimile apparatus, and an object thereof is to reduce deterioration of resolution in facsimile transmission / reception as much as possible. [Structure] When sending a facsimile, if the resolution capability of the receiver is lower than the resolution you want to send and the recording size capability of the receiver is larger than the paper size you want to send (S43), the resolution degradation is minimized. It is configured to be enlarged (S44, S45) and transmitted.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transmission system in a facsimile machine. In recent years, the use of facsimiles has rapidly increased in place of mail and the like for communication of electronic messages or images that require immediacy. For this reason, it is required that even fine characters or figures can be transmitted clearly.
The present invention has been made to meet this demand.

[0002]

2. Description of the Related Art In the transmission method of a conventional facsimile apparatus, when the resolution capability of a receiver is lower than the resolution to be transmitted, it is transmitted in a reduced size according to the resolution capability of the receiver. It was For example, if the resolution of the document to be transmitted by the transmitting terminal is 400 dpi (dots per inch) and the recording resolution capability of the receiver is 200 dpi, the transmitting terminal converts from 400 dpi to 200 dpi and transmits. It was

[0003]

For the reasons described above,
When sending small characters, for example, A3 size is reduced to A4 size or 400dpi to 200dpi
When converted into, the resolution was deteriorated on the receiving side and the characters could not be read in some cases (see FIGS. 2 and 3, hereinafter, dots are indicated by white circles). Therefore, it is an object of the present invention to reduce the deterioration of resolution in facsimile transmission / reception as much as possible.

[0004]

According to one embodiment of the present invention, as illustrated in FIG. 1, when transmitting a facsimile, the resolution capability of the receiver is lower than the resolution to be transmitted, and the paper to be transmitted. When the recording size capability of the receiver is larger than the size (S43), the transmission size is expanded to the recording size with the minimum resolution deterioration (S44, S45), and the transmission method in the facsimile apparatus is provided.

In another form of the present invention, FIG.
As illustrated in, when sending a facsimile,
When the resolution capability of the receiver is lower than the resolution to be transmitted (S52), resolution conversion is not performed and the transmission original is divided and transmitted (S53, S54).

[0006]

According to the present invention, when the resolution capacity of the receiver is lower than the resolution to be transmitted and the recording size capacity of the receiver is larger than the paper size to be transmitted, the deterioration of the resolution is minimized by enlarging the transmission. It becomes possible to suppress to. Further, when the resolution capability of the receiver is lower than the desired resolution to be transmitted, the resolution of the transmitted characters or graphics can be prevented from deteriorating by dividing and transmitting the transmission original.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A block diagram of an apparatus for carrying out a transmission method in a facsimile apparatus as a first embodiment of the present invention is shown in FIG. 6 and its partial block diagram is shown in FIG. This device includes a control unit 21, a reception function determination unit 11, a size expansion unit 12, a transmission / reception unit 13, a program memory unit 22, an operation unit 23, a display unit 24, a reading unit 25, and a recording unit 26. These elements are connected to the control unit 21 by a bus.

FIG. 5 shows a main part of the elements shown in FIG. 6 in order to explain the present invention. The reception function determination unit corresponds to the reception function determination unit 11 in FIG. 6, determines the resolution to be transmitted at the time of transmission, the paper size and the resolution of the receiver, and the recording size, and determines the enlargement size that minimizes resolution deterioration. It is a part. The size enlargement unit corresponds to the size enlargement unit 12 in FIG. 6 and is a unit that enlarges the size based on the determination result of the reception function determination unit and includes an image data compression / conversion / decompression unit. The transmission / reception unit 13 includes an NCU unit and a modem unit, and performs a facsimile procedure and actual transmission / reception.

A control unit 21 in FIG. 6 is a control unit for controlling the entire facsimile apparatus, and a program memory unit 22 stores a program. The operation unit 23 is an operation unit that is operated by an operator, and the display unit 24 displays the operation content and the operation status of the device. The reading unit 25 reads the transmission document and the recording unit 26 records the reception document.

In the facsimile apparatus of the first embodiment, the resolution and the paper size to be transmitted are designated, and the transmission is performed so that the deterioration of the resolution is minimized by comparing with the reception function at the time of transmission. For example, the resolution is specified by the operation unit 23, and the paper size is automatically recognized by the reading unit 25. The determination of the reception function at the time of transmission can be found by the transmission / reception unit 13 during the facsimile procedure.
The reception capability determination unit 11 determines the resolution and size of the enlarged transmission. Based on this information, the size enlarging unit 12 performs enlarging processing and transmits.

Next, an example of transmitting an A4 (A4 size) document at 400 dpi will be described. FIG. 2 is a dot image (shown by white circles) when an A4 size document is read at 400 dpi. When transmitting, the receiver's capability is 200 dp
If i is A3 size, the resolution is 1/2 = [200dpi / 400 when transmitted in A4 size with this device.
dpi]. FIG. 3 is a dot image in the case of using simple thinning (simply remove one dot from two dots) at this time. However, if the present embodiment is used, the reception capability is expanded to the A3 size, so the resolution can be suppressed by a deterioration of about 7/10. This relationship is expressed by the following equation. Also, the dot image enlarged to A3 above is shown in FIG.
It is illustrated in. Resolution = (RR / TR) × (RS / TS) where RR is the receiver resolution, TR is the desired resolution,
RS is the paper size of the receiving capacity and TS is the paper size of the transmitting capacity. The image illustrated in FIG. 4 is a simple thinning-out, that is, 3 dots are extracted from 10 dots (with a resolution of 7/10).

FIG. 1 shows a flow chart of the processing steps of the apparatus of this embodiment from steps S41 to S46. First, in S41, the resolution and the document size desired to be transmitted are determined. In S42, the capability of the other device (receiver) is determined by the facsimile procedure at the time of transmission. That is, the resolution and recording size of the receiver are determined. In S43, it is determined whether the resolution to be transmitted exceeds the resolution of the partner machine and the recording size of the receiver is larger than the paper size to be transmitted.
If the condition is not satisfied, the process shifts to normal transmission, and if the condition is satisfied, the enlargement size is obtained in S44 and S45.
In step S46, the size is enlarged, and in step S46, the size is transmitted.

FIG. 10 is a block diagram of an apparatus for performing a transmission method in a facsimile apparatus as a second embodiment of the present invention.
Shown in. This device includes a microprocessor unit (MPU) 31, a key 32, a key input control circuit 33 that receives an output from the key 32, an LCD display screen 34, an LCD.
A display control circuit 35 for controlling the display screen 34, a file memory 36 as a memory for storing encoded image data, a communication controller 37 connected to a line, and a program ROM 3
8, program work memory 39, data table memory 40, font data memory 41, compression / decompression circuit 42, printer 44, recording control circuit 43 for controlling printer 44, scanner 46, and reading control circuit for controlling scanner 46 45 is provided.

The above-mentioned elements are the same except for the key 32, the LCD display screen 34, the printer 44, and the scanner 46.
It is connected to the MPU 31 via a bus. In this device, one page of image data can be expanded in the font data memory 41 and transmitted according to the capability of the partner terminal.

A flow chart of the processing steps in this embodiment is shown in steps S52 to S55 of FIG. First, A4
If you want to start sending the original of 400 size at 400dpi, S5
In step 2, it is judged whether the partner device has the capability of 400 dpi. If it has the capability, the normal transmission is performed (S5).
5). If it does not have the capability, the left half of the A4 size document (see the letter A in FIG. 8, the dot portion is shaded) is transmitted as the first page (S53). The transmission result is doubled in the vertical direction and the horizontal direction and transmitted and output, as shown by the letter A in FIG. Next, the right portion character B (FIG. 8) of the A4 size transmission original is enlarged and transmitted as the second page (S54) (see character B in FIG. 9). When S54 ends, the transmission ends. In such a process, it becomes possible to transmit an original document while suppressing deterioration of resolution to a minimum.

[0016]

According to the present invention, in facsimile transmission / reception, deterioration of resolution can be suppressed as small as possible.

[Brief description of drawings]

FIG. 1 is a flowchart showing a process of a transmission method in a facsimile apparatus as a first embodiment of the present invention.

FIG. 2 is a diagram showing an example of a 400 dpi, A4 size dot image.

FIG. 3 is a diagram showing an example of a 200 dpi, A4 size dot image.

FIG. 4 is a diagram showing an example of a dot image of 200 dpi and A3 size.

FIG. 5 is a partial view of an apparatus for performing the method of the first embodiment for explaining the present invention.

FIG. 6 is a block diagram of an apparatus that performs the system of the first embodiment.

FIG. 7 is a flowchart showing a processing process of the system of the second embodiment of the present invention.

FIG. 8 is a diagram showing an example of A4 size, 400 dpi image dots.

FIG. 9 is a diagram showing an example of image dots received at A4 size and 200 dpi.

FIG. 10 is a block diagram of an apparatus for performing the method of the second embodiment.

[Explanation of symbols]

 11 ... Receiving function determining unit 12 ... Size expanding unit 13 ... Transmitting / receiving unit 21 ... Control unit 22 ... Program memory unit 23 ... Operating unit 24 ... Display unit 25 ... Reading unit 26 ... Recording unit 31 ... MPU 32 ... Key 33 ... Key Input control circuit 34 ... LCD display screen 35 ... Display control circuit 36 ... File memory 37 ... Communication control unit 38 ... Program ROM 39 ... Program work memory 40 ... Data table memory 41 ... Font data memory 42 ... Compression / decompression Circuit 43 ... Recording control circuit 44 ... Printer 45 ... Read control circuit 46 ... Scanner

Claims (3)

[Claims] 1. When a facsimile is transmitted, if the resolution capability of the receiver is lower than the resolution to be transmitted and the recording size capability of the receiver is larger than the paper size to be transmitted (S43), resolution deterioration is minimal. A transmission method in a facsimile apparatus, characterized in that the transmission is enlarged to the size (S44, S45) and transmitted. 2. When the receiver resolution is RR, the resolution to be transmitted is TR, the receiving capacity paper size is RS, and the transmitting capacity paper size is TS, (RR / TR) × (RS / TS) is 1 as much as possible. 2. The transmission method in the facsimile apparatus according to claim 1, wherein the recording size is enlarged by selecting the paper size ratio (RS / TS) so as to be closer to the above. 3. When the resolution capability of the receiver is lower than the resolution to be transmitted during facsimile transmission (S5).
2) A transmission method in a facsimile apparatus in which a transmission original is divided and transmitted without resolution conversion (S53, S54).