JPH03229566A - Image data convertion method - Google Patents

Abstract

PURPOSE:To realize the real-time conversion and transmission of image data by converting beforehand text data into the image data by utilizing the timing of the command/response of a transmitting side and a receiving side. CONSTITUTION:The conversion from a 1-page encoded image 10A into a 1-page decoded image 10B and the overlay of the TEXT data converted into dot data to the 1-page decoded image 10B are executed previously by utilizing the timing of the command/response of the transmitting side and the receiving side. Thus, the 1-page decoded image 10B is converted into a signal adaptive to the receiving side, and the 1-page encoded image (after conversion) 10C is obtained. The contents of this 1-page encoded image 10C is read out by every one line, and is transmitted to the receiving side. As the result, at the time of the actual transmission of the image data, since the text data is converted before into the image data, the real time image data transmission can be realized.

Description

[Detailed Description of the Invention] [Summary] Regarding an image data conversion method for converting and transmitting image data, the purpose is to convert image data in real time, and to add text data to image data to perform pig transfer. In this case, prepare an image memory to store one page of image data and a character font table to convert text pigs to dot data, and adjust the timing of command/response (transmission procedure signal transmission and reception) on the sending and receiving sides. is used to decode one page of encoded image data and store it in the image memory, convert the text data into dot data using the character font table and superimpose it on the image memory, and then The configuration is configured to perform image data conversion.

[Industrial Application Field] The present invention relates to an image data conversion method for converting and transmitting image data, and more specifically, the present invention relates to an image data conversion method for converting and transmitting image data.
The present invention relates to a method of converting image data when transmitting information such as sender information by overlaying it on the top of a page of facsimile data.

With the recent increase in the use of facsimile communication services and the diversification of required services, there is a demand for devices that implement facsimile mail/broadcast services that transmit accumulated image data to specified destinations. For this reason, image data storage devices are provided, but they overlay text (TEXT) data such as sending/receiving blue information and destination information on the stored image data, and the pixel density of the destination terminal. Data compression method 1: If the device capabilities such as paper size are not compatible and the data needs to be converted to match the terminal's capabilities, it cannot be processed in real time during communication, so convert the data into a compatible format and then send it again. There is a need to.

[Conventional technology] FIG. 5 is an explanatory diagram of a conventional data conversion method.

In conventional image storage devices, if the capabilities of the receiving terminal notified at the start of communication do not match the pixel density of the image data to be transmitted, the data compression method such as MH/MR, or the paper size, the following method is used to store the image. data is transferred.

That is, the image data encoded and stored in one page encoded image (before conversion) 1 is read line by line and decoded. The decoded 1-Iran decoded image 2 is encoded in accordance with the capabilities of the other party's terminal, and converted into a 1-line encoded image 3. The converted coded image line by line is sent as data.

FIG. 6 is a diagram showing the start timing of conventional data conversion processing. First, Dis (identification signal) is sent from the receiving side to the transmitting side (■). When the sending side receives this DIS, it confirms the destination terminal and sends DC3 (reception command signal) to the receiving side (■). Furthermore, the transmitting side sends TCF (+-Learning check signal) to the receiving side.
Send (■). When the receiving side receives this TCP, it returns a CFR (reception preparation confirmation signal) to the sending side (■)
When the transmitting side receives the CFR, it performs data conversion as shown in FIG. 5 and starts sending (■). As a result, image data is sent from the transmitting side to the receiving side (■).

[Invention or Problem to be Solved] When overlaying text data on image data using the conventional method, at least the number of lines for one character of text (for example, if one character is converted to 24x24 dot font data, 24 lines (16 lines in the case of 16×16 dots) must be decoded at once to process. In other words, since text data is code data, it is necessary to convert it to image data.

Therefore, even if text data is overlaid on image data and an attempt is made to transmit the data, real-time data conversion cannot be performed at the time of sending the data, and unless the capabilities of the destination terminal are compatible, the data cannot be transmitted.

The present invention has been made in view of the above problems, and an object of the present invention is to provide an image data conversion method that can process text overlay on an image and pig conversion in real time during communication.

[Means for Solving the Problems] FIG. 1 is a flowchart showing the principle of the system of the present invention. In the present invention, when data is transferred by adding text data to image data, an image memory for storing one page of image data and a character font table for converting text data into dot data are prepared (step 1). ), decodes one page of encoded image data and stores it in the image memory using the command/response timing of the sender and receiver, and also converts the text data into dot data using the character font table. It is characterized in that it is superimposed on the image memory (step 2), and the superimposed image data is subjected to image data conversion (step 3).

[Operation] Text data is converted into image data in advance using the timing of commands/responses (sending and receiving transmission procedure signals) on the sending side and the receiving side. As a result, since the text data has already been converted to image data at the time of actual image data transmission, real-time image data transmission is possible.

[Example] Hereinafter, an example of the present invention will be described in detail with reference to the drawings.

FIG. 2 is an explanatory diagram of the operation of the present invention. First, it is assumed that encoded image data before conversion is stored in the OA (1 page encoded image).

Consider overlaying text data on this encoded image IOA to convert it into an encoded image suitable for the receiving side.

The one-page encoded image IOA is decoded (■),
One-vegetable decoded image is stored in IOB. On the other hand, T
EXT data 11 is font data (dot data)
and is overlaid on the one-vegetable decoded image IOH (■). This conversion from one-page encoded image IOA to one-page decoded image IOB, and TEX
The overlay (2) of the T data converted into dot data onto the one-page decoded image IOB is performed using the command/response timing on the sending side and the receiving side.

The one-page decoded image 10B in which the TEXT data is overlaid on the image data in this way is converted into a code suitable for the receiving side (■), and a one-page encoded image (after conversion) 10C is obtained. The contents of this one-page encoded image IOC are read line by line and transmitted to the receiving side.

FIG. 3 is a diagram showing the data conversion start processing timing according to the present invention. First, the receiving side sends DIS to the sending side.
(identification signal) is sent (■).

When the sending side receives this DIS, it confirms the capabilities of the destination terminal, and therefore knows whether the data is necessary or unnecessary. Therefore, the sending side starts data conversion processing for one facsimile page (Sl).
3 (reception command signal) is sent to the receiving side (■). Furthermore,
The transmitting side sends TCP (1-Learning Check Signal) to the receiving side (■). On the receiving side, this TCP
When the receiver receives the message, it returns a CFR (reception preparation confirmation signal) to the transmitting side (■).

Upon receiving the CFR, the transmitting side checks whether the conversion process is complete (S2). It takes about 6 seconds after starting data conversion to confirming that the conversion is complete. Then check whether the data conversion is complete (S
3). If the process is not completed, the process waits for completion until a time event of the communication timer occurs (up to 6 seconds after receiving the CFR signal), and when the process is completed, pig delivery is started (S4). Then, the converted image data is sent from the transmitting side to the receiving side (■).

As described above, according to the present invention, by utilizing the timing (approximately 6 seconds, maximum 12 seconds) between when the transmitting side receives the DIS signal and when the receiving side transmits the CFR signal, the TEXT data can be transmitted during this period. If the overlay to image data and data conversion processing are completed, the conversion will be completed by the time the image data is sent in the communication procedure (■), so data can be transferred in real time.

In addition, if there are multiple pages of image data, the conversion process starts when the transmission of the previous page is completed, and the process is completed within the time required to send and receive the next page transmission procedure signal, so the conversion process is performed when sending the data. can be completed.

Therefore, if data conversion is required by overlaying TEXT data and communication does not match the capabilities of the terminal at hand, data can be changed in real time during communication and transmitted.

FIG. 4 is a block diagram showing an embodiment of the transmitting side implementing the present invention. In the figure, broken lines indicate the operations of the transmission request image data, thin solid lines indicate the operations of the TEXT code data, and thick solid lines indicate the operations of the overlaid image data. In the figure, 20 is a host computer, 21 is an internal bus, 30 is an image storage and transmission adapter for communication processing,
22 is a line.

In the image storage and transmission adapter 30, 31 is a host interface unit that interfaces with the host computer 20, and 32 is a TEX for transmitting image data/overlay destination information sent from the host computer 20.
An interface memory 33 receives the T code data, and is a character font extractor that converts the overlaid TEXT code data character by character into a dot image (for example, 24×24 dots).

34 holds decoded image data, and
A dedicated memory for decoding images that performs a logical OR with the overlay data converted into an image by the character font extraction unit 33; 35 is an image decoding/encoding conversion unit that decodes/encodes the image; 37 is a line control unit connected to the line 22;

The character font extractor 33 has a function corresponding to the symbol (■) in FIG. 2, and the decoded image dedicated memory 33 holds data indicated by the one-page decoded image IOB in FIG. The image decoding/encoding conversion unit 35 has the functions shown in FIG. Holds image data. The operation of the circuit configured as described above will be explained as follows.

, the host computer 20 in the interface memory 32
The encoded image data passed from the receiver is stored in the encoded image dedicated memory 36. The encoded image data stored in the encoded image dedicated memory 36 is developed into a decoded image by the image decoding/encoding conversion unit 35, and is stored in the decoded image dedicated memory 34.

On the other hand, the TEXT data received from the host computer 20 to the interface memory 32 is expanded into image data character by character by the character font extractor 33, and stored in the decoded image memory 34. In this way, the logical sum of the image data decoded by the image decoding/encoding converting section 35 and the output data of the character font extracting section 33 is obtained. As a result, the character image data is overlaid on the image data in the decoded image dedicated memory 34.

The decoded image data stored in the decoded image dedicated memory 34 is transferred to the image decoding/encoding conversion unit 35.
The data is read out, encoded into a data format compatible with the format of the transmission destination (receiving side) terminal, and stored in the encoded image dedicated memory 36. The encoded data stored in the encoded image dedicated memory 36 is read out line by line,
It is sent out to line 22.

[Effects of the Invention] As explained in detail above, according to the present invention, commands/responses (transmission procedure signal transmission and reception) between the transmitting side and the receiving side
By using this timing to convert text data into image data in advance, the text data will have already been converted to image data when the image data is actually sent, allowing for real-time image data conversion and transmission. I can do it.

[Brief explanation of drawings]

FIG. 1 is a flowchart showing the principle of the method of the present invention. FIG. 2 is a detailed explanation of the present invention. FIG. 3 is a diagram showing the start timing of data conversion processing according to the present invention. FIG. 5 is a block diagram showing one embodiment. FIG. 5 is an explanatory diagram of a conventional data conversion method. FIG. 6 is a diagram illustrating the start timing of conventional data conversion processing. In Fig. 4, 20 is a host computer, 21 is an internal bus, 22 is a line, 30 is an image storage and transmission adapter, 31 is a host interface section, 32 is an interface memory, 33 is a character font extraction section, and 34 is dedicated for decoding images. 35 is an image decoding/encoding conversion unit; 36 is a memory dedicated to encoded images; and 37 is a line control unit. Fig. 4 is a flowchart showing the principle of the method of the present invention.

Claims (1)

[Claims] When data is transferred by adding text data to image data, an image memory for storing one page of image data and a character font table for converting text data into dot data are prepared ( Step 1): Using the command/response timing on the sending side and the receiving side, one page of encoded image data is decoded and stored in the image memory, and the text data is converted into dot data using a character font table. An image data conversion method characterized in that the image data is superimposed on an image memory (step 2), and the superimposed image data is subjected to image data conversion (step 3).