JPH06205191A - Pdl facsimile equipment - Google Patents

Abstract

PURPOSE:To send the original requiring a capacity larger than a reception capability of a receiver terminal equipment without degrading the quality. CONSTITUTION:The facsimile equipment is provided with a PDL controller 5 expanding PDL data to bit map data and printing out the data. When the reception capability of the receiver terminal equipment is known and PDL data to be sent are an original whose capacity is larger than the reception capability of the receiver terminal equipment, the PDL data are expanded while the expansion resolution is decreased. Furthermore, when the reception capability of the receiver terminal equipment is unknown and the PDL data to be sent require larger capacity than a prescribed size, two kinds of picture data (the original data being expansion of PDL data as they are and the expanded PDL data while the expansion resolution is decreased) are stored before calling the receiver terminal equipment and the receiver terminal equipment is called and the data are sent.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a PDL (Page Description Language) facsimile machine, and more particularly to a facsimile machine for transmitting an original having a size exceeding the receiving capability of a receiving side terminal.

[0002]

2. Description of the Related Art In a conventional PDL facsimile machine, P
If the original created by DL (Page Description Language) is larger than the receiving capability of the receiving terminal, the transmitting side expands the image once to the original size and then the expanded image data is received by the receiving terminal. I tried to reduce the size to fit and send. The PDL (page description language) is a language for instructing a print image to the printer when a document is printed by a page printer, and a typical PDL is “PostScript”. A "PDL facsimile machine" is a printer part of a facsimile machine or a PD controller as a printer controller.
A page printer that can interpret L is used. That is, the PDL facsimile apparatus receives the PDL code instead of the image data, and has the merit that high quality print quality can be obtained by expanding the image data on the receiving side.

[0003]

In the conventional PDL facsimile apparatus, when the original to be transmitted has a size larger than a predetermined size such as A4 size,
Depending on the receiving side terminal, there are some which cannot receive the original of that size. In that case, as described above, the transmission original is reduced to an original having a size that can be received by the receiving terminal. In that case, in the conventional facsimile apparatus, the original is reduced by performing linear density conversion or scaling on the image data. Therefore, the transmission original is P
Even if it is described in DL, it has once been developed into bitmap data, and linear density conversion and scaling have been performed on it, so there is a drawback that the printing quality is degraded. SUMMARY OF THE INVENTION It is an object of the present invention to provide a PDL facsimile apparatus which eliminates these drawbacks and can transmit a document having a size larger than the capability of the receiving terminal without degrading the quality.

[0004]

P to which a PDL controller having a function of expanding PDL (Page Description Language) data into bitmap data and printing it out is added.
In the DL facsimile machine, when the receiving capability of the receiving side terminal is registered in a telephone directory or the like and is known, a PD to be transmitted
If the L data is a document larger than the receiving capability of the receiving side terminal, the development resolution is lowered and the PDL data is developed to reduce the size of the image data that can be received by the receiving side terminal and transmit the transmitted document. I am trying to do it.

If the receiving capability of the receiving terminal is unknown or if the PDL data to be transmitted is larger than a predetermined size, the original document in which the PDL data is expanded as it is before the call is made, and the expansion resolution is lowered to reduce the PDL data. The data is expanded, two types of image data of a document reduced to a predetermined size are stored, a call is made, and the document having the receiving capability of the other party is transmitted. Further, when the image data is received in the PDL format and the size of the received document is larger than the size of the document of the own terminal,
By expanding the PDL data with a lower expansion resolution, the paper size of the terminal is reduced to a printable size for output.

[0006]

According to the present invention, when the receiving capability of the receiving side terminal is known in a PDL facsimile apparatus to which a PDL controller having a function of expanding PDL (page description language) data into bitmap data and printing it out is added. , If the PDL data to be transmitted is a document larger than the receiving capability of the receiving side terminal, the development resolution is lowered and the PD
By expanding the L data, the transmission original is reduced to the size of the image data that can be received by the receiving terminal and is transmitted. Therefore, a large original that exceeds the capability of the receiving terminal without impairing the print quality. Can be sent.

Further, according to the present invention, when the receiving capability of the receiving side terminal is unknown, and when the PDL data to be transmitted is larger than a predetermined size, the original document in which the PDL data is unfolded before calling and the unfolding resolution are set. Since the PDL data is expanded to a low level, two types of image data of a document reduced to a predetermined size are saved, a call is made, and the document having the receiving capability of the other party is transmitted. That is,
Since two types of images are created and stored in advance before calling the receiving side terminal, an image suitable for the receiving capability of the receiving side terminal can be immediately transmitted without impairing the quality. Further, according to the present invention, when the image data is received in the PDL format and the received original is larger than the original having the paper size of the own terminal, the development resolution is lowered and the PD is reduced.
By expanding the L data, the data is reduced to a printable size with the paper size of the own terminal and is output. Can be printed.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a block diagram of the overall configuration of a facsimile apparatus according to an embodiment of the present invention. In FIG. 1, reference numeral 1 denotes a system control unit that controls the entire facsimile apparatus, and 2
Is a storage device for storing transmitted or received originals, 3 is a communication control unit having an interface with an ISDN or PSTN line, and 4 is a communication controller for inputting originals to be transmitted by PDL data or bitmap data An input unit 5 is a PDL controller that interprets PDL data and develops it into bitmap data, and 6 is a printer that outputs PDL data that has been bitmap expanded and a received document.

FIG. 2 is a flow chart of the first embodiment of the present invention. The first embodiment is carried out when the receivable document size of the transmission destination terminal (reception side terminal) is already known, for example, as described in a telephone directory or individually notified. Here is an example. The first embodiment will be described with reference to the flowchart of FIG. In step 10, the size of the document to be transmitted is detected. Step 1
In step 1, the size of the document that can be received by the known destination terminal (reception side terminal) is referred to. For this reference, the size of the receivable document for each destination terminal (reception side terminal) is registered in the storage device 2 (see FIG. 1) of the transmission side terminal and automatically referred to. You may It may be recorded in a notebook or the like, and the user may refer to it and input that fact through a push button or the like.

In step 12, the size of the original document detected in step 11 is compared with the size of the original document that can be received by the destination terminal referenced in step 11, and the original document to be transmitted is the destination terminal (reception side). Terminal) to determine if it can be received. If it is determined in step 12 that the data can be received, the process proceeds to step 14 and the PDL data is expanded. If it is determined in step 12 that reception is not possible, step 13
After calculating the development resolution with, proceed to step 14
Expand to data. In step 15, the other party's terminal is called (calling), and in step 16, the transmission of the original is started.

FIG. 3 is a flow chart for calculating the development resolution executed in step 14 in the flow chart of FIG. The flowchart of FIG. 3 will be described. In step 20, the resolution d of the receiving terminal is detected. In step 21, the size of paper that can be received by the receiving terminal is detected. In step 22, the number of dots in the main scanning of the receiving terminal, that is, the number of pixels (x0) is detected from the resolution d of the receiving terminal detected in step 20 and the receivable paper size. Next, in step 23, the number of dots in the main scanning of the original document of the transmitting terminal, that is, the number of pixels (x1) is detected from the resolution d of the receiving terminal detected in step 20 and the size of the created original document. In step 24, x0 and x obtained in steps 22 and 23
The main scanning magnification (x = x0 / x1) is calculated from 1.

Next, at step 25, the number of sub-scanning lines (y0) of the receiving side terminal is detected. In step 26, the number of original sub-scanning lines (y1) of the transmission side terminal is detected. Then, in step 27, the sub-scanning scaling ratio (y = y0 / y1) is calculated. Then, in step 28, the original magnification (W =
min {x, y}) is calculated. Finally, step 20
The development resolution (D = d * W) is calculated from the resolution d of the receiving terminal detected in step S4 and the original document magnification W calculated in step S28.

When x = y, the overall scaling ratio is W = x, and when developed with a resolution of D = (d * x) times, the original can be reduced to a desired size. When x <y, x
In the case of x> y, the value of y is set to the entire scaling factor, so that the original information to be transmitted can be transmitted without being lost.

For example, from ISO B4 size to ISO
Consider the case of converting to A4 size, 200 dpi (dot per inch). The number of pixels for main scanning in ISO B4 size is 2048 pixels at 200 dpi.
The number of pixels for main scanning in A4 size is 1 at 200 dpi
There are 728 pixels. At this time, the scaling factor is 0.84 times (x = 0.84). For sub-scanning, IS
2780 pixels for O B4 size, ISO A4
Since the size is 2339 pixels, the scaling factor is 0.
It is 84 times (y = 0.84). Therefore, ISO B4
When the size is reduced to ISO A4 size, the expansion resolution is 200 (dpi) * 0.84 = 168 (dp
i).

FIG. 4 is a flow chart of the second embodiment of the present invention. The second embodiment is an embodiment in the case where the receivable document size of the transmission destination, that is, the receiving side terminal is unknown. A second embodiment will be described with reference to the flowchart of FIG. In step 30, the size of the transmission original is detected, and in step 31, it is determined to be a predetermined size (hereinafter, the predetermined size is A4 size).
(It will be explained in the case of size) It is determined whether or not The determination result in step 31 is “not smaller than A4 size”,
That is, in the case of “larger than A4 size”, the development resolution is calculated in step 32. This development resolution is calculated in the same manner as shown in FIG. At this time,
Since the document size that can be received by the receiving terminal is unknown,
A4 200 dpi is calculated as the receiving capability of the receiving side terminal. That is, the scaling factor is calculated from the A4 size and the size of the transmission document, and the expansion resolution is calculated in the same manner as in FIG.

In step 33, the PDL data is expanded into A4 size bitmap data according to the expansion resolution obtained in step 32, and in step 34 it is stored in the storage device 2 (see FIG. 1). The method of expanding PLD data into bitmap data may be a well-known method that is generally used. Further, in step 35, it is expanded into bitmap data at the original size expansion resolution (expansion resolution obtained by the process of the flowchart of FIG. 3 in the size of the actual transmission document), and it is stored in the storage device 2 in step 36. . Even when the determination result in step 31 is “A4 size or less”, the process proceeds to step 35, and the bitmap data expanded at the expansion resolution of the original size is stored in the storage device 2.

Then, in step 37, the other terminal is called. In step 38, it is determined "whether the receiving terminal can receive the original size original". If "receivable", the original size original (bitmap data saved in step 36) is transmitted in step 39. If the result of determination in step 38 is “not receivable”, in step 40, an A4 size original document (bitmap data stored in step 34) is transmitted. That is, the original is A4
If the size is larger than the original size, the original size and A4 size
Two sizes of bitmap data are stored, and either one is transmitted depending on the receiving capability of the receiving side terminal.

FIG. 5 is a flow chart of the third embodiment of the present invention. The third embodiment is a flowchart for printing the received data at the receiving side terminal. A third embodiment of the present invention will be described with reference to FIG. Step 5
At 0, the received document size is detected. Step 51
In, the reference is made to the document size that can be printed on the terminal.
Here, the document size that can be printed by the own terminal is the storage device 2
(See FIG. 1). In step 52, it is determined whether or not the document size received can be printed by the terminal. If the result of determination is that printing is not possible, the flow proceeds to step 53 and the expansion resolution is calculated. The calculation of the development resolution at this time is performed by the same method as in FIG. 3, but the “reception side terminal” in the flowchart of FIG. 3 is replaced with “own terminal”, and the “transmission document” is replaced with “reception document”. Read. In step 54, the bitmap data is expanded into the bitmap data with the expansion resolution calculated in step 53, or the PDL data is expanded into the bitmap data as it is. In step 55, printing of the original is started with the bitmap data obtained in step 54.

In summary, in the third embodiment, when an original is received in the PDL data format, if the received original size is printable by the terminal, the PDL data is directly converted into bitmap data. If the received document cannot be printed on the terminal, the scaling factor is calculated from the document size and the document size that can be printed out, and the expansion resolution is calculated according to the calculated expansion resolution. , PDL data is expanded into bitmap data and the received original is reduced and printed.

[0020]

According to the present invention, the original having a size larger than the receiving capability of the receiving side terminal can be transmitted without degrading the quality by expanding the PDL while lowering the developing resolution.
In addition, by creating and saving data of a plurality of sizes in the sending terminal in advance, it is possible to immediately send a document having a size larger than the receiving capability of the receiving terminal without degrading the quality after making a call. . Furthermore, if the received original is larger than the printable paper size of your terminal, you can print it on your terminal without lowering the print quality by lowering the expansion resolution and expanding the PDL data. It can be printed in any size.

[Brief description of drawings]

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

FIG. 2 is a flow chart of the first embodiment of the present invention.

FIG. 3 is a flowchart for obtaining a development resolution in the present invention.

FIG. 4 is a flow chart of a second embodiment of the present invention.

FIG. 5 is a third flowchart of the present invention.

[Explanation of symbols]

 1 System Control Unit 2 Storage Device 3 Communication Control Unit 4 Original Input Device 5 PDL Controller 6 Printer 7 Other Devices

Claims (3)

[Claims] 1. In a facsimile apparatus to which a PDL controller having a function of expanding PDL data into bit map data and printing out is added, when the receiving capability of a receiving side terminal is known, the PDL data to be transmitted is the receiving side. When the original is larger than the receiving capability of the terminal, the expansion resolution is reduced to expand the PDL data, and the transmission original is reduced to the size of the image data that can be received by the receiving terminal and transmitted. PDL facsimile machine that does. 2. The facsimile device according to claim 1, wherein when the receiving capability of the receiving side terminal is unknown, the PD to be transmitted
If the L data is larger than a predetermined size, the original document in which the PDL data is directly expanded before calling,
Expand the PDL data with a lower expansion resolution, save two types of image data of the original reduced to a predetermined size, make a call, and then send the original with the receiving capability of the other party. Characteristic PDL facsimile machine. 3. The facsimile apparatus according to claim 1, wherein when the image data is received in the PDL format and the received document is larger than the paper size of the own terminal, the expansion resolution is lowered. A PDL facsimile machine characterized in that the PDL data is expanded to be reduced to a printable size with the paper size of its own terminal and output.