JPS62252273A - Facsimile equipment - Google Patents

Abstract

PURPOSE:To prevent the occurring of an image nonuniformity even at the time of reducing recording and to obtain the recording picture of full size even when the device is used as a copying machine by making the line density of the printer of a recording part larger than the line density of the scanner of a reading part and adding a function to execute the expansion only reversely several times as much as the reducing scale factor. CONSTITUTION:At a receiving side, a sent picture signal is received by a receiving control part 5, and in such a usual case, after a necessary signal processing is executed, the picture signal is outputted to a recording part 10. In such a case, the line density of a recording device 8 is set larger than that of a recording part 3. Consequently, an output picture 9 is reduced from an original 1. At such a time, since picture information is not thinned, an image nonuniformity will not occur. Not only when the device is to be used as a copying machine but also when the reproducing picture of full size with an original picture is desired, a changeover switch 7 is changed over, receiving data are once inputted to a picture information expanding part 6, the expanding reversely several times as much as the reducing magnification of the abovementioned reducing recording is executed and the data are given to the recording part 10.

Description

Detailed Description of the Invention [Field of Industrial Application] The present invention relates to a facsimile machine, and in particular to control of image information in a facsimile machine recording unit suitable for a facsimile machine having a recording device for plain paper such as a laser beam printer. Regarding.

[Conventional technology]

Plain paper recording facsimile 'J uses an electrostatic recording method using cut paper such as a laser beam printer.

In order to prevent image information from being lost in the periphery of the paper, the image information may be previously reduced to a size slightly smaller than the paper size and recorded.

This reduction recording method involves making the linear density of the printer larger than the scanner of the reading section, thereby reducing all output images, or assuming that the linear density of the printer is the same as that of the scanner of the reading section, and then Two methods are known for reducing image size by thinning out image information on the side.

[Problem that the invention seeks to solve]

The conventional technology described above, which achieves reduction by making the line density of the printer larger than that of the reading section scanner, can only obtain reduced images even if you want the original image and the original size of the sickle image, such as when you want to use the facsimile machine as a copying machine. There were drawbacks.

Further, in the conventional technique in which image information is thinned out on the receiving side to realize reduction, there is a drawback that image unevenness occurs because the dither pattern is disturbed by thinning out the K image information during halftone recording (during dither information recording).

It is an object of the present invention to be able to control image information so that image unevenness does not occur even when reducing the size of the image, and when desired, such as when using the machine as a copying machine, the image can be recorded in the original size. Its purpose is to provide facsimile machines.

[Means to solve problem skin]

The above purpose is to make the linear density of the printer in the recording section of the facsimile machine higher than the linear density of the scanner in the reading section, and to add an image information enlargement function that enlarges the reduced recording by the reciprocal of the reduction magnification. This is achieved by

[Effect]

Since a reduced image can be obtained without thinning out image information by using a printer in the recording section whose linear density is a little higher than that of the scanner in the reading section, single-image unevenness will not occur.

In addition, the single-image information enlargement function enlarges the output image by the reciprocal of the reduction rate of the reduction recording before outputting it to the printer in the recording section, making the resulting image the actual size.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a simplified perspective view of a reading section and a recording section, and a block circuit diagram of a signal processing section, showing one embodiment of the present invention.

At R in FIG. 1, in the sending facsimile machine, a document 1 is sequentially read by a reading sensor 2 of a scanner of a reading section 3 including a single sheet feeding mechanism. The read image signal is sent from the transmission control section 4 to the receiving facsimile machine via a telephone line or the like.

On the receiving side, the received image signal is received by the reception control unit 5, and in normal cases where a full-size output image is not required, the image signal is output to the printer in the recording unit 10 after performing the necessary signal processing. do. In the recording section 10, recording is performed on recording paper 9 by the recording device 8.

Here, the linear density of the recording device 80, that is, the number of pixels per unit length, is set larger than that of the reading section 6. That is, the number of pixels per unit length of the recording device 8 is m, fd
f, if we take that of take part 5 as le.

The values of m and n are respectively selected to be m ) 3. Therefore, the output image 9 is reduced to - with respect to the original 1.

FIG. 2 shows the relationship between the original 1 and the output image 9 in this case. In FIG. 2, the original 1 is somewhat reduced on the output image 9 and is contained within the range of the output drawing paper.

At this time, since the image information is not thinned out in any way, image unevenness does not occur even if it is used during halftone recording (dither information recording).

In the above example, the sending side and the receiving side are connected by a telephone line, but when a facsimile machine is used as a copying machine, operations from reading to recording are performed within the same device.

Next, when the facsimile machine is used as a copying machine, or when the original image and the original size are desired to be reproduced, image reproduction is performed in the following manner.

That is, in FIG. 1, when the selector switch 7 is switched in the opposite direction to that shown, the output signal from the reception control section 5 does not directly enter the printer 10, but is temporarily input to the image information enlarging section 6.

FIG. 3 is an explanatory diagram illustrating the operation of the image information enlarging section 6. As shown in FIG.

The figure shows the case where the original image (α) is enlarged 574 times, and by adding the same pixel every 4 pixels as shown by diagonal lines in (b), the number of pixels is increased by 1 and enlarged. be able to.

In the case of halftone recording, if the dither pattern is created after the image information is enlarged, the recorded image will not be disturbed by the enlargement.

By enlarging the image sent to the printer 10 in advance using the image information enlarging function having the above-mentioned functions, it is possible to obtain the original 1 and an output image of the original size. That is, if the linear density of the scanner 5 on the reading side, that is, the number of pixels per unit length = 4, and the number of pixels per unit length of the recording device d on the recording side = 5, then the changeover switch 7
If it is as shown in Figure 1, the output image 9 is 41 for the original 1Vc.
5, but if the changeover switch is switched in the opposite direction to that shown in the figure, and the signal from the reception control section 5 is input manually to the image information enlarging section 6, the image is enlarged, and then output to the printer. The image is once enlarged to 5/4, then sent to the printer 10 and reduced to 415. As a result, the output image 9 has the same size as the original 1, and a reproduced image of the original size is obtained.

〔Effect of the invention〕

According to the present invention, a reproduced image in actual size can be obtained when desired, such as when using it as a copying machine.

In addition, when performing normal reception as a facsimile, a reduced image without image unevenness can be obtained even when receiving halftones. There are five effects.

[Brief explanation of drawings]

FIG. 1 shows an example of actual winding of the present invention;
Figure 2 is an explanatory diagram showing the reduction of the output image, Figure 3 is a diagram showing the output image reduction.
The figure is an explanatory diagram showing an example of a method for enlarging image information. 1... Original document, 5... Reading section, 4... Transmission control section,
5... Reception control unit, 6... Image information enlarging unit, 7... Selector switch, 8... Recording device, 9... Output image, 10.
...Record Department. , / '% Patent attorney Katsuo Ogawa (' Figure I

Claims (1)

[Claims] 1. An original reading section, an image recording section having a linear density greater than that of the original reading section, and an image information enlarging section that enlarges in advance image information input to the image recording section. A facsimile machine having a 2. In claim 1, the image information enlarging section:
A facsimile device configured to magnify input image information by the reciprocal of the linear density ratio between the document reading section and the image recording section.