JP2002218148A - Facsimile terminal - Google Patents

Abstract

PROBLEM TO BE SOLVED: To allow a personal computer to simply display a document received by a color facsimile terminal without the need for an exclusive tool when the document is transmitted as electronic mail or directly transferred to the personal computer. SOLUTION: When a color document received by an opposite facsimile terminal through color facsimile communication is transferred to the Internet, a DNL(Define number of lines) marker segment used for line designation of a color facsimile terminal is replaced with a parameter Y of an SOF(Start of Frame) marker segment, an APP1(Application 1) marker segment is replaced with an APP0(Application 0) marker segment, a JPEG coded data are once subjected to JPEG decoding to convert the CIELAB color space into the YcbCr color space, the image data subjected to color space conversion are again JPEG coded, obtained coded data are converted into data with a form attached to electronic mail, the electronic mail is created and transmitted to the Internet.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a facsimile apparatus, and more particularly, to a facsimile apparatus having a color facsimile communication function for transmitting and receiving a color document and an Internet facsimile communication function for transmitting a color document by electronic mail.

[0002]

2. Description of the Related Art A color facsimile apparatus for transmitting and receiving a color document in addition to a conventional monochrome document, and an Internet facsimile apparatus for transmitting and receiving a monochrome and color document by connecting to the Internet have been put to practical use.

[0003] A color facsimile apparatus is an ITU-T.
T. 30 Annex E recommends that color documents be transmitted and received. The original read by the image reading unit is JPEG encoded. The color space used is ITU-TT. 42, and C
The IELAB color space is used. Further, since a normal color original is transmitted while being read, the number of lines is not determined until the original is read. Therefore, usually JP
Instead of specifying the number of lines in the parameter Y of the SOF marker segment attached to the beginning of the EG encoded data, the number of lines is designated by attaching the DNL marker segment to the end of the encoded data.

FIG. 9 shows a general format of JPEG encoded data used in a color facsimile machine. JPEG
The encoded data 900 includes an SOI (Start of Image) marker segment 901, various marker segments 902, a frame 903, a DNL (Define number of lines) marker segment 904, and an EOI (End of lmage) marker segment 905.

[0005] An SOI marker segment 901 indicates the start of encoded data.

The various marker segments 902 include APP
1 (Application 1) marker segment 907, COM
(Comment) Marker segment 908, DHT (Define
Huffman table) marker segment 909, DQT (Def
ine quantization table) marker segment 910 and the like.

The APP1 marker segment 907 stores a character string "G3FAX0" indicating that the encoded data is data for color facsimile.

[0008] In the COM marker segment 908, a comment of encoded data is stored as a character string.

The DHT marker segment 909 includes JP
Information for forming a Huffman table used for encoding EG is stored.

[0010] The DQT marker segment 910 stores a quantization table.

The frame 903 has an SOF (Start of Fra).
me) marker segment 911, SOS (Start of Sca
n) It is composed of a marker segment 912 and compressed data 913.

The SOF marker segment 911 includes an SOF marker 915 indicating the beginning of a frame and a frame header 916. The frame header 916 includes a parameter Lf918, a parameter P919, a parameter Y
920, a parameter X921, and a parameter Nf922. The parameter Lf918 indicates the length of the parameter in the frame header. Parameter P919
Indicates the bit precision per pixel of each color component of the input image. Parameter Y920 indicates the number of lines in the image,
In the case of color facsimile, 0 or a value larger than the number of lines of the DNL marker segment 904 is specified. The parameter X921 indicates the number of pixels per line. Parameter Nf922 indicates the number of color components in the frame.

An SOS marker segment 912 indicates the start of a scan.

The compressed data 913 stores the main body of the encoded image data.

In the DNL marker segment 904, the total number of lines of the image is specified. In color facsimile,
Since the total number of lines of an image may not be determined at the start of encoding, a DNL marker code is added to the end of the compressed data, and the number of lines is specified in the next two bytes.

The EOI marker segment 905 indicates the end of the encoded data.

Also, the Internet facsimile apparatus is compatible with RFC (Request for Comments) # 2301, # 2
302, # 2303, # 2304, # 2305, # 23
06, and ITU-TT. 37, and it is possible to send and receive color and monochrome originals via the Internet. Communication with the Internet is performed by connecting to an Internet service provider through a telephone line or directly connecting to a LAN. The color original read by the image reading unit is JPEG-encoded and TIFF-C (Tagged image).
file format Profile C) and then MIME (Multipurpose internet mail extensi)
ons) It is encoded and sent to the Internet as an e-mail as an image file in an e-mail attachment format.

A facsimile apparatus having both a color facsimile communication function and an Internet facsimile communication function is also conceivable. A facsimile apparatus having a function of transferring a document received by a normal facsimile to an electronic mail by the Internet facsimile is also conceivable. FIG. 8 is a schematic block diagram of a facsimile apparatus having both a color facsimile communication function and an Internet facsimile communication function function.

Reference numeral 801 denotes a control unit which controls the entire facsimile apparatus. Generally, a CPU (central control unit) is used.

An operation unit 802 includes a keypad for inputting a telephone number and transmitting a facsimile.

A display unit 803 displays a telephone number, a status of the facsimile apparatus, an operation menu, and the like.

Reference numeral 804 denotes a JPEG decoding unit for JPEG decoding a color document received from a facsimile machine of the other party.

A monochrome decoding unit 805 decodes a monochrome document received from a facsimile machine of the other party. MH, MR, MM
R and JBIG are used.

Reference numeral 806 denotes a RAM, which is mainly a control unit 801.
And is used to store work memory and documents to be sent and received.

Reference numeral 807 denotes a ROM, which is mainly a control unit 801.
And a program and data for controlling the facsimile machine are stored.

Reference numeral 808 denotes a printing unit which performs processing for printing a monochrome document or a color document received from the other party on a sheet.

Reference numeral 809 denotes a communication control unit, which
0 to control the connection to the other party's facsimile machine or to the Internet service provider.

Reference numeral 810 denotes a telephone line, which is a general public line for connecting to a destination facsimile machine.

Reference numeral 811 denotes an e-mail conversion unit which converts image data into a format for transmission as e-mail and adds information for transmission as e-mail to the Internet.

Reference numeral 812 denotes a JPEG encoding unit, which encodes a color original read from the original reading unit 816 by a JPEG encoding method in order to transmit a color original to a facsimile apparatus of the other party.

Reference numeral 813 denotes a monochrome encoding unit which converts a monochrome original read from the original reading unit 816 into MH,
Encoding is performed by MR, MMR, JBIG encoding, or the like.

Reference numeral 816 denotes a document reading unit which reads a monochrome document or a color document in order to transmit the document to a partner facsimile machine.

Reference numeral 819 denotes a TIFF conversion unit which converts encoded data to be transmitted in monochrome into TIFF-S (Tagged image f) when communicating with the Internet facsimile apparatus.
ileformat Profile S) format, color is TIFF-C
It converts the received image data into TIFF-S format or TIFF-C format image data into encoded data.

A communication control unit 809 connects to a facsimile machine via a telephone line 810. The document received from the partner facsimile machine is stored in the RAM 806. When the other party's facsimile machine has the color facsimile function, the received document is a JPEG encoded color document. When printing the received color document, the encoded data stored in the RAM 806 is copied to the JPE
The G decoding unit 804 decodes the data, and the printing unit 808 prints it on recording paper. To print a monochrome document, use R
The encoded data stored in the AM 806 is decoded by the monochrome image decoding unit 805 and printed by the printing unit 808 on recording paper.

When the document received from the other party's facsimile machine is transferred to the Internet facsimile, the encoded data stored in the RAM 806 is converted by the TIFF conversion unit 819 after the communication is completed. In the case of color encoded data, that is, in the case of JPEG encoded data, the data is converted into the TIFF-C format, and the e-mail conversion unit 811 converts the data into the text format, and sets the transfer destination address as the transmission address. The created electronic mail is created, and the communication control unit 809 connects to the Internet service provider via the telephone line 810 and transmits the created electronic mail. TIFF-
The C format image data takes a format in which a header indicating image information is added before the encoded data, and the encoded data itself is JPEG encoded data.

The Internet facsimile communication function is
Basically, it is realized by an e-mail transmission / reception function. It is also possible to transmit as an electronic mail other than the Internet facsimile image data format specified in Recommendation 37.

As described above, in a facsimile apparatus having a function of transferring a document received from a facsimile apparatus to an electronic mail, a color document received from a color facsimile apparatus is JPEG-encoded and transferred to an electronic mail to the Internet. To do so, convert the JPEG-encoded data as is to the email attachment format,
Sending to the Internet by e-mail.

A conventional example of a technique for transmitting a facsimile image to the Internet using the Internet is disclosed in Japanese Patent Laid-Open No. 10-107938 (name:
"Image transmission system and server of image transmission system")
And the technology disclosed in US Pat.

[0039]

However, the JPEG encoding format used in color facsimile uses a DNL marker segment to specify the number of lines and uses a CIELAB color space as a color space. Therefore, when the received JPEG-encoded data is directly transferred to an e-mail, when it is received by a personal computer or the like, there are problems in that the data cannot be decoded or displayed in a correct color.

In addition, a dedicated image display tool is required for correct display, and there is a problem that an image received by e-mail cannot be immediately viewed. For example,
Internet Explorer, a standard OS attached to Microsoft Windows, which is an OS widely used in personal computers, is a tool that can display JPEG encoded images. It cannot be displayed as it is.

Accordingly, a technical problem to be solved by the present invention is to solve the above-mentioned problems of the prior art, and the purpose is to convert a color document received by a color facsimile apparatus into a color document. When transferring to a personal computer by e-mail or transferring to a personal computer connected to a facsimile machine, the transferred personal computer can transfer the transferred color image data without the need of a dedicated tool. , And can be easily and correctly displayed.

[0042]

SUMMARY OF THE INVENTION A facsimile apparatus according to the present invention is configured and operates as follows in order to achieve the above object.

First, a color document is received from a partner facsimile machine via a telephone line. The received color document is encoded data encoded by JPEG, and a DNL marker segment is used to specify the number of lines.
The number of lines included in this DNL marker segment is represented by S
Write to parameter Y in OF marker segment,
Delete the DNL marker. Further, the APP1 marker segment indicating that the encoded data is data for color facsimile is deleted, and instead, a JFIF (JP) which is a data format generally used in personal computers is used.
EG File Interchange Format) is added. Further, the encoded data is once decoded, and the color space is changed from the CIELAB color space to Y.
Conversion to CbCr color space and re-encoding.

The encoded data obtained by the above conversion is
In order to send it by e-mail, it converts it to MIME format data, creates an e-mail as an attached file of the e-mail, creates an e-mail with the destination e-mail address set in advance as a destination address, and connects to an Internet service provider And send the created email.

Further, instead of transferring the encoded data obtained by the above conversion to an electronic mail, the encoded data is transferred to a personal computer connected to a facsimile apparatus.

[0046]

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

FIG. 1 is a block diagram showing a schematic configuration of a facsimile apparatus according to one embodiment of the present invention.

Reference numeral 101 denotes a control unit which controls the entire facsimile apparatus of the present embodiment. Generally, a CPU (central control unit) is used.

An operation unit 102 includes a keypad for inputting a telephone number and transmitting a facsimile.

A display unit 103 displays a telephone number, a status of the facsimile apparatus, an operation menu, and the like.

A JPEG decoding unit 104 JPEG decodes a color document received from the other party's facsimile machine.

Reference numeral 105 denotes a monochrome decoding unit for decoding a monochrome document received from a facsimile machine of the other party. MH, MR, MM
R and JBIG are used.

Reference numeral 106 denotes a RAM, which is mainly a control unit 101.
And is used to store work memory and documents to be sent and received.

Reference numeral 107 denotes a ROM, which is mainly a control unit 101.
And a program and data for controlling the facsimile machine are stored.

Reference numeral 108 denotes a printing unit, which performs a process of printing a monochrome document or a color document received from a partner on a sheet.

Reference numeral 109 denotes a communication control unit, which
0 to control the connection to the other party's facsimile machine or to the Internet service provider.

Reference numeral 110 denotes a telephone line, which is a general public line for connecting to a facsimile machine.

An electronic mail conversion unit 111 converts image data into a format for transmission as electronic mail, and adds information for transmission to the Internet as electronic mail.

Reference numeral 112 denotes a JPEG encoding unit which encodes a color original read from the original reading unit 116 by a JPEG encoding system in order to transmit a color original to a facsimile apparatus of the other party.

Reference numeral 113 denotes a monochrome encoding unit which converts the monochrome document read from the document reading unit 116 into MH,
Encoding is performed by MR, MMR, JBIG encoding, or the like.

A color space conversion unit 114 converts the color space of the color image data from the CIELAB color space to the YCbCr color space.

Reference numeral 115 denotes a marker segment conversion unit.
A process of replacing the DNL marker segment and the APP1 marker segment with the SOF marker segment and the APP0 marker segment is performed.

Reference numeral 116 denotes a document reading unit which reads a monochrome document or a color document for transmission to a facsimile machine of the other party.

Reference numeral 117 denotes a personal computer connection unit which is connected to the personal computer 118 and transmits received image data to the personal computer 11.
8 is performed.

Reference numeral 119 denotes a TIFF conversion unit which converts coded data to be transmitted into a TIFF-S format for monochrome and a TIFF-C format for color, or a received TIFF-C format when communicating with the Internet facsimile apparatus.
A process for converting image data in the S format or TIFF-C format into encoded data is performed.

Next, the flow of processing for transferring a received color document to the Internet by e-mail will be described with reference to FIG.

The process starts from S201 and enters a standby state of S202. The communication control unit 109 checks in step S203 whether there is an incoming call.
2 is in the standby state. If there is an incoming call, the process proceeds to S204, where the communication control unit 109 connects to the other party color facsimile device via the telephone line 110. Normally, it is confirmed here whether the other party is a color facsimile machine or a monochrome facsimile machine, but here, it is assumed that the other party is connected to the color facsimile machine.

After connecting to the other party color facsimile machine,
In step 205, the received color image data is
Save to 6. The color image data stored in the RAM 106 is encoded data encoded by the JPEG encoding method.

At this time, it is checked whether an e-mail transfer setting has been made in S206, and if an e-mail transfer setting has been made, the flow proceeds to S207. Before the communication is started, the setting of the e-mail transfer is performed by the operation unit 102.
To switch between forwarding and non-forwarding, and to set the destination e-mail address.

In step S207, it is checked whether one page of color image data has been received. If the reception of one page has not been completed, the process returns to step S205 to continue receiving the color image data. It is determined whether reception of one page of image data has been completed by determining whether an EOP (End of Page) signal or an MPS (M
ulti Page Signal) signal.

If it is determined in step S207 that the reception of one page of color image data has been completed, the flow advances to step S208.

At S208, the replacement of the DNL marker segment is performed. The replacement of the DNL marker segment is performed by the marker segment conversion unit 115. One page of JPEG encoded data stored in the RAM 106 is extracted and passed to the DNL marker segment converter 115, where
After the conversion of the NL marker segment, the encoded data is written back to the RAM 106 again. The process of replacing the DNL marker segment will be described later.

At S209, the APP1 marker segment is replaced. The replacement of the APP1 marker segment is performed by the marker segment conversion unit 115. APP1
After converting the marker segment into the APP0 marker segment, the encoded data is written back to the RAM 106 again. A
The process of replacing the PP1 marker segment will be described later.

At S210, the marker segment conversion unit 1
15, the DNL marker segment and the APP1 marker segment are replaced, and the JPEG encoded data stored in the RAM 106 is
Performs decryption.

In S 211, the image data decoded by the JPEG decoding unit 104 is converted by the color space conversion unit 114 into a C
The color conversion is performed from the IELAB color space to the YCbCr color space. The color space conversion processing will be described later.

In step S212, the color space conversion unit 114
The image data that has been color space converted to the bCr color space is JPEG encoded again by the JPEG encoding unit 112.

The JPE from S210 to S212
The processing of G decoding, color space conversion, and JPEG encoding is described in JP
In order to save the memory capacity required for storing the image data after EG decoding, the encoded data is divided into decodable units, and JPEG decoding, color space conversion, JPEG encoding are performed for each unit. Shall be repeated. The encoded data after the color space conversion is stored in the RAM 106.
Since the color facsimile JPEG encoded data includes information of a quantization table and a Huffman table necessary for encoding, the same quantization table and Huffman table are also used when re-encoding after color space conversion. use.

In S213, it is determined whether the reception of all pages has been completed. The communication control unit 109 determines whether the reception of all pages has been completed. If reception of all pages has not been completed, the process returns to S205, where reception of the next page is performed.
Steps S205 to S212 are repeated.

If it is determined in step S213 that the reception of all pages has been completed, the process advances to step S214, where the communication control unit 109 disconnects the telephone line 110, and terminates communication with the other party's facsimile machine.

At S220, the JPEG received by the immediately preceding communication and having undergone marker segment replacement and color space conversion
In order to send encoded data to the Internet,
Perform MIME encoding. When sending an e-mail to the Internet, the format of the e-mail must be a text format. Therefore, image data in a binary format is converted to a text format. Usually, a text conversion method called Base64 is used. Email converter 11
At step 1, text conversion of JPEG encoded data stored in the RAM 106 is performed. Since the received decrypted data of a plurality of pages is stored in the RAM 106,
A text conversion process is performed for each page as an attached file.

In S 221, the e-mail converting unit 111 causes the destination information of the transmission destination, the information of the transmission source, the transmission date,
Information such as the format of the image data to be attached is added, and an e-mail with the text-converted JPEG encoded data attached as an attached file is created. As the destination information of the transmission destination, an e-mail address set in advance as an e-mail transfer destination using the operation unit 102 and the display unit 103 is used.

At S222, the communication control unit 109 connects to the Internet service provider (ISP) via the telephone line 110.

In S223, the electronic mail created by the electronic mail conversion unit 111 is transmitted from the communication control unit 109 to the Internet.

When the transmission of the e-mail is completed, S224
Then, the communication control unit 109 disconnects the telephone line 110 and disconnects from the Internet service provider.

At S225, the process of transferring the received color document to the electronic mail to the Internet is completed.

On the other hand, if it is determined in step S206 that e-mail transfer has not been set, the process proceeds to step S215, where JP is set.
It is decoded by the EG decoding unit 104, and the process proceeds to S216,
The printing unit 108 prints the decoded image.

In step S217, the communication control unit 109 determines whether reception of all pages has been completed. If there is a next page, the process returns to step S205, where reception of the next page is performed, and reception of all pages is completed. In this case, the process proceeds to S218, where the line is disconnected.

Next, the process of replacing the DNL marker segment and the process of replacing the APP1 marker segment performed by the marker segment converter 115 will be described.

First, the replacement of the DNL marker segment will be described.

The color document received from the other party's facsimile machine via the telephone line 110 is encoded data encoded by JPEG. This encoded data uses a DNL marker segment to specify the number of lines. FIG. 3 shows the configuration of the DNL marker segment.
The DNL marker segment is composed of a DNL marker code (0x
FFDC) followed by two bytes of data, and the two bytes of data following the DNL marker code indicate the number of lines of image data. In the DNL marker segment 301, 2 of 0xFF and 0xDC
The byte indicates the DNL marker code, and the two bytes y0 and y1 indicate the number of lines of the image.

JFIF commonly used in personal computers
In the image data format (JPEG File Interchange Format), this DNL marker cannot be used, and the parameter Y in the frame header following the SOF marker code is used to specify the number of lines. The number of lines indicated by the DNL marker segment is written in the parameter Y, and the DNL marker is replaced from the encoded data by replacing the DNL marker segment.

FIG. 4 shows an SOF marker segment 4 before conversion.
01 to the SOF marker segment 501 converted to FIG.
Are respectively shown. The SOF marker code is 0xFFC0
This is Baseline among the JPEG encoding methods.
Indicates that the DCT scheme is used. The number of lines of the image is indicated by the parameter Y of the SOF marker segment 401, and before conversion, 0 or a value larger than the number of image lines indicated by the DNL marker segment is stored here. By storing the number of lines y0 and y1 of the DNL marker segment in this parameter Y, the SOF
A marker segment 501 is obtained. After this conversion, the DNL marker segment becomes unnecessary and is deleted.

Next, replacement of the APP1 marker will be described.

JPE received from color facsimile
The G-encoded color document is an APP1 to indicate that the encoded data is for color facsimile.
In the marker segment, the identifier is "G3FAX0"
Is specified. However, an image display tool usually used in a personal computer cannot recognize the APP1 marker segment, and cannot determine that the encoded data is a color facsimile document. Therefore, this APP1 marker segment is deleted,
Furthermore, the character string "JFIF" is specified in the identifier A
By adding the PP0 marker segment to the encoded data, the image data format is changed to JFIF (JPEG File Interc
Hange Format).

FIG. 6 shows a color facsimile apparatus JPE.
5 shows a configuration of an APP1 marker segment used in G encoded data. The APP1 marker segment 601 includes A
It is composed of PP1 marker code 0xFFE1, marker segment length, identifier, and data. Length l0, l
1 designates the length of a marker segment that does not include the APP1 marker code. A character string "G3FAX0" is designated as the identifier, which indicates that the data is color facsimile JPEG encoded data. The data includes version information and resolution.

FIG. 7 shows the configuration of the APP0 marker segment in the JFIF format of the JPEG encoding format generally used in personal computers and the like. APP0
The marker segment 701 includes an APP0 marker code 0x
It is composed of the length, identifier, and data of FFE0 and the marker segment. For the lengths m0 and m1, the length of the marker segment not including the APP0 marker code is specified. The identifier includes a character string “JFIF” and a terminating 0
x00 is designated to indicate that the data is JPEG coded data in JFIF format. The data includes version information and resolution.

The marker segment conversion unit 115 converts APP data from the received JPEG encoded data
After searching for one marker segment and extracting the resolution information, the APP1 marker segment is deleted, and instead, the APP0 marker segment in which the extracted resolution information is embedded is embedded in the JPEG encoded data.

Replacement of DNL marker segment and APP
The JPEG encoded data after the replacement of one marker segment is converted from the color facsimile JPEG image format shown in FIG. 9 to the general JPEG image format shown in FIG.

Next, the color space conversion processing performed by the color space conversion unit 114 will be described.

JPE received from color facsimile
G-coded color documents use the CIELAB color space as the color space. On the other hand, JPEG encoded data usually used in a personal computer uses a YCbCr color space as a color space. Since the JPEG encoded data does not include information on the color space, if the JPEG encoded data in the CLELAB color space is to be displayed on a personal computer, the image display tool of the personal computer is assumed to be in the YCbCr color space. Since the display is regarded as being performed, it cannot be displayed in a correct color.

In order to perform color space conversion, it is necessary to temporarily decode encoded data. Usually, in order to perform color conversion, a converted color component is calculated and obtained from each color component using a conversion formula. However, in order to reduce the calculation time of the color conversion, a look-up table in which the values after the color conversion are calculated in advance is used. The lookup table is configured to obtain three converted color components from the three color components. However, since a large amount of memory is required to convert the values converted from all colors into a table, usually only some representative points are used as a table, and the values between the representative points are calculated by linear interpolation or the like. To get.

For example, consider a case where the values of Y, Cb, and Cr, which are the color components of the YCbCr color space, are obtained from L *, a *, and b *, which are the color components of the CIELAB color space. CIE
Lookup tables for converting the LAB color space to the YCbCr color space include Y_table □□□, Cb_table □□
□, Cr_table □□□, CIELAB
From the value of each color component in the color space, Lp, ap, bp, YCb
It is assumed that the values Yp, Cbp, and Crp of each color component in the Cr color space are obtained. Here, eight representative points on the lookup table, which are vertices of a cube surrounding Lp, ap, and bp, are represented by L
i, ai, and bi (i = 0 to 7), and weights inversely proportional to the distance from the representative point are mYi, mCbi,
Assuming that mCri (i = 0 to 7), the calculation of the color conversion can be performed by the following (formula 1) to (formula 3).

[0103]

(Equation 1) By performing the same calculation for all the color components of the decoded image data, image data in the CIELAB color space can be converted to image data in the YCbCr color space.

In the above example, the color document received from the other party facsimile is converted to the DNL marker segment by the SOF.
Replace with the marker segment, delete the APP1 marker segment and replace with the APP0 marker segment, decode once, and convert the CIELAB color space to the YCbC
In the above example, the color space is converted to the color space, JPEG-encoded again, and sent to the Internet by e-mail. The transfer destination is an Internet fax device or a personal computer that supports Internet fax reception. In such a case, there is no need for such image data conversion processing. For this reason, the operation unit 102 can set whether to transmit as an Internet facsimile or e-mail according to the destination to be transferred. For example, if you select "Forward" when setting "Forwarding / Forwarding" in the forwarding setting menu, you can select either "Forwarding for Internet" or "Forwarding E-mail" in the subsequent menu, or When registering an e-mail address in the phonebook,
What is necessary is just to be able to set whether the address is for an Internet facsimile machine or an e-mail.

When Internet facsimile transfer is selected by the menu setting of the operation unit 102, or when the transfer destination address is registered in the telephone directory as an Internet facsimile machine, the communication control unit 1
09, the JPEG-encoded color document received via the telephone line 110 is temporarily stored in the RAM 106. After the reception of the encoded data, the line is disconnected, and the received encoded data is transmitted to the TIFF conversion unit 119. TIFF-
After the image data is converted into the C-format image data, the electronic mail is converted into MIME-encoded data by the electronic mail conversion unit, and the communication control unit 109 connects to the Internet service provider to transmit the generated electronic mail.

In the example described above, the color space is converted from the CIELAB color space to the YCbCr color space. However, the transfer destination personal computer supports the display of a JPEG image in the CIELAB color space. In this case, there is no need to perform the color space conversion process. In this case, the operation unit 102
In advance, whether or not to perform color space conversion at the time of transfer is set in advance, and when a color document is received, the process of replacing the DNL marker segment and the process of replacing the APP1 marker segment in the example described above are performed. After performing, JPEG decoding and color conversion processing and JPE re-processing
The e-mail converting unit 111 does not perform the G encoding process.
Then, after encoding the encoded data by MIME encoding to create an e-mail, connect to an Internet service provider,
E-mail may be sent to a preset transfer destination.

Further, in the example described above, in the received color JPEG encoded data, the DNL marker segment is replaced with the SOF marker segment, the APP1 marker segment is deleted and replaced with the APP0 marker segment, and the decoding is performed once. Color space conversion from the CIELAB color space to the YCbCr color space,
Although the example in which the image data is G-encoded and transmitted to the Internet by e-mail has been described, the converted image data may be transmitted to a personal computer connected to a facsimile apparatus instead of being transmitted to the e-mail to the Internet. Good. In this case, by issuing an instruction to transfer the received color facsimile document to the personal computer from the operation unit 102, the above-described image conversion processing is performed, and then the encoded data is transmitted to the personal computer 118 via the personal computer connection unit 117. Is transferred.

[0108]

As described above, according to the present invention, when a color document received by a color facsimile apparatus is transferred by e-mail, a color image attached to the received e-mail is transmitted by a destination personal computer. The data can be easily displayed without requiring a dedicated tool.

Further, by setting the switching between Internet facsimile transfer and electronic mail transfer, even if the communication partner is an Internet facsimile machine, the image data can be converted by a method in accordance with the standard of the Internet facsimile machine. If the transfer is possible and the transfer destination is not an Internet fax machine,
By performing the conversion of the encoded data of the present invention, it becomes possible to correctly display an image on the personal computer at the transfer destination.

Also, the YCbCr color space
By making it possible to set whether to perform color space conversion to the color space or not, the transfer destination can be set to CIELA.
When the JPEG encoded data encoded in the B color space can be displayed, the color space conversion processing is not performed, so that the decoding, color conversion, and re-encoding processing accompanying the color space conversion can be omitted. it can.

Further, when the received color document is transferred to a personal computer connected to the facsimile apparatus, the conversion of the coded data of the present invention is carried out, so that the image conversion processing and the exclusive The transferred color image can be displayed without the need for the display tool.

[Brief description of the drawings]

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

FIG. 2 is a flowchart illustrating a flow of transmitting a color fax document by e-mail according to an embodiment of the present invention.

FIG. 3 is a diagram showing a configuration of a DNL marker segment.

FIG. 4 is a diagram showing a configuration before conversion of an SOF marker segment.

FIG. 5 is a diagram showing a configuration after conversion of an SOF marker segment.

FIG. 6 is a diagram showing a configuration of an APP1 marker segment.

FIG. 7 is a diagram showing a configuration of an APP0 marker segment.

FIG. 8 is a schematic block diagram of a facsimile apparatus having a color facsimile communication function and an Internet facsimile communication function.

FIG. 9 is a diagram showing a data structure of a JPEG image used in color facsimile.

FIG. 10 is a diagram showing a data structure of a general JPEG image.

[Explanation of symbols]

 Reference Signs List 101 control unit 102 operation unit 103 display unit 104 JPEG decoding unit 105 monochrome decoding unit 106 RAM 107 ROM 108 printing unit 109 communication control unit 110 telephone line 111 electronic mail conversion unit 112 JPEG encoding unit 113 monochrome encoding unit 114 colors Space conversion unit 115 Marker segment conversion unit 116 Document reading unit 117 Personal computer connection unit 118 Personal computer 119 TIFF conversion unit 301 DNL marker segment 401 SOF marker segment before conversion 501 SOF marker segment after conversion 601 APP1 marker segment 701 APP0 marker segment 801 Control Unit 802 operation unit 803 display unit 804 JPEG decoding unit 805 monochrome decoding unit 806 RAM 807 ROM 808 printing unit 809 communication control unit 10 Telephone line 811 E-mail converter 812 JPEG encoder 813 Monochrome encoder 816 Document reader 819 TIFF converter 900 JPEG encoded data 901 SOI marker segment 902 Various marker segments 903 Frame 904 DNL marker segment 905 EOI marker segment 907 APP1 marker segment 908 COM marker segment 909 DHT marker segment 910 DQT marker segment 911 SOF marker segment 912 SOS marker segment 913 Compressed data 915 SOF marker code 916 Frame header 918 Parameter Lf 919 Parameter P 920 Parameter Y 921 Parameter X 922 Parameter JPEG 950 Coded data 951 SOI Marker segment 952 Various marker segments 953 Frame 95 EOI marker segment 957 APP0 marker segment 958 COM marker segment 959 DHT marker segment 960 DQT marker segment 961 SOF marker segment 962 SOS marker segment 963 Compressed data 965 SOF marker code 966 Frame f parameter 968 Parameter L P 970 Parameter Y 971 Parameter X 972 Parameter Nf

Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat II (Reference) H04N 1/46 H04N 1/46 C (72) Inventor Takayuki Imagawa 22-22 Nagaikecho, Abeno-ku, Osaka-shi, Osaka In-house F-term (reference) 5C062 AA02 AA14 AA25 AA29 AB02 AB22 AB23 AB43 AB44 AC08 AC25 AC29 AC43 AE03 AF03 AF13 BA00 BD00 5C075 AB90 CA14 CA90 CD07 CD20 FF90 5C077 LL17 MP01 MP08 PP31 PQ22 PQ23 RR21 ASA01 DA025 HA13 HB08 HB11 LA01 LA27 LA31 LB11 MA01 MA19 NA27 NA29 PA01

Claims (7)

[Claims] A control unit for controlling the entire facsimile apparatus; an operation unit for inputting a telephone number and operating a menu;
A display unit for displaying the status of a facsimile or a menu, a JPEG decoding unit for decoding a received color image, a monochrome decoding unit for decoding a received monochrome image, and saving of a work memory or an image memory RA for
M, a ROM for storing control programs and data, a printing unit for printing a received document, a communication control unit for connecting to a facsimile machine or a connection to an Internet service provider, text conversion of image data and electronic mail. An e-mail conversion unit for creating a document, a JPEG encoding unit for encoding a color document to be transmitted, a monochrome encoding unit for encoding a monochrome document to be transmitted, and a document reading unit for reading the document to be transmitted. In a facsimile apparatus having a color facsimile communication function and an Internet facsimile communication function, when a color document received from a partner facsimile apparatus by the color facsimile communication is transferred to the Internet, the color document is used to designate a line of the color facsimile. Add DNL marker segment to SOF marker And a marker segment conversion unit that replaces the APP1 marker segment with the APP0 marker segment, and JPEG-decodes the JPEG-encoded data once to convert the color space from the CIELAB color space to the YCbCr color space. A color space conversion unit for converting the color space converted image data into JPEG-encoded image data, creating an e-mail in an e-mail attachment format for the obtained encoded data, and transmitting the e-mail to the Internet. Facsimile machine characterized. 2. The method according to claim 1, wherein information on the number of lines of the image included in the DNL marker segment of the JPEG-encoded color document received from the other party facsimile apparatus is extracted, and the information is extracted using the parameter Y of the SOF marker segment. DNL to the number of lines in the image shown
JPEG storing information on the number of lines of an image extracted from a marker segment and deleting the DNL marker segment
A facsimile apparatus for generating encoded data. 3. A color document according to claim 1, wherein the JPEG-encoded color document received from the other party facsimile apparatus is decoded little by little, and the color space is changed to a CI.
A facsimile apparatus characterized by converting from an ELAB color space to a YCbCr color space and re-encoding. 4. The apparatus according to claim 1, wherein necessary information such as resolution is extracted from an APP1 marker segment of a JPEG-encoded color document received from a facsimile apparatus, and converted into an APP0 marker segment. Facsimile machine. 5. The color document according to claim 1, further comprising means for switching between an electronic mail transfer and an Internet facsimile transfer. Claim 2 or Claim 3 or Claim 4
After performing the encoded data conversion processing described in the above section, and transmitting the data to the Internet as an e-mail, if the Internet facsimile transfer is set, the above-described conversion is not performed, and the data is converted to the TIFF-C format. Facsimile machine for transmitting to the Internet 6. The apparatus according to claim 3, further comprising: means for switching whether or not to perform the color space conversion according to claim 3. 4. A segment and an APP1 marker segment are replaced and JPEG-decoded once.
After performing the color space conversion processing described above, control is performed so that the encoded data that has been JPEG-encoded again is transferred. A facsimile apparatus characterized in that the facsimile apparatus transfers the data in an encoded state without performing JPEG decoding. 7. A control unit for controlling the entire facsimile apparatus, an operation unit for inputting a telephone number and operating a menu,
A display unit for displaying the status of a facsimile or a menu, a JPEG decoding unit for decoding a received color image, a monochrome decoding unit for decoding a received monochrome image, and saving of a work memory or an image memory RA for
M, a ROM for storing control programs and data, a printing unit for printing a received document, a communication control unit for connecting to a facsimile machine, a JPEG encoding unit for encoding a color original to be transmitted, and a transmission unit. A facsimile machine having a monochrome facsimile device having a monochrome facsimile communication function having a monochrome encoding unit for encoding a monochrome document to be transmitted, and a document reading unit for reading a document to be transmitted, transmits the color document received from the partner facsimile device to a personal computer. It has a transfer function, replaces the received JPEG encoded color document with a DNL marker segment used for color facsimile line designation with a parameter Y (number of lines) of an SOF marker segment, and furthermore, an APP1 marker. Replace the segment with the APP0 marker segment. G decoding,
A facsimile apparatus which converts a color space from a CIELAB color space to a YCbCr color space, performs JPEG encoding again, and transmits obtained encoded data to a personal computer.