WO2010013287A1 - Information display controller - Google Patents

Abstract

An information display controller on electronic paper by means of steganography. The information display controller encodes information which cannot be recognized by human eyes and embeds it in printed matter, in particular without degrading display design. The controller has a reception part for receiving a pickup image in which the electronic paper containing the information encoded by the steganogrpahy is imaged, a decoding part for decoding the encoded information based on the pickup image, and a transmission part for transmitting the decoded information to the electronic paper to display visible decoded information decoded by the decoding part on the electronic paper.

Description

Information display control device

The present invention relates to an information display control device that displays information on electronic paper using steganography.

Today, electronic paper has begun to be put into practical use, and products that take advantage of the merit of being able to rewrite information as needed, without requiring power for display maintenance, have been proposed. On the other hand, various codes such as a QR code (quick response code), a barcode, and a steganography are used as codes for accessing electronic information from a display object, and are used for various media such as products, magazines, and posters.

Further, Patent Document 1 is an invention of a circulation device that changes display information depending on a person who circulates. A fingerprint input unit is provided in the circulation device, and fingerprint information input from the fingerprint input unit is collated with fingerprint information stored in advance. In the case of coincidence, the information that can be viewed is displayed to the person who performed the fingerprint collation.
JP 2004-185408 A

However, when the above QR code or bar code is used, it becomes clear that additional information linked to electronic information is printed on a magazine or a poster, and the confidentiality of the information cannot be ensured. This also causes information leakage.

Also, when using QR code or barcode, printing space is required. In particular, since QR codes and barcodes are recognized even from a remote location, a large space is required when printing a large size.

Furthermore, in the conventional case, even if the above code is read at any location, the same linked content is accessed, and even when different information needs to be acquired depending on the location, it cannot be handled. In addition, there is a method of embedding a code different depending on a location and acquiring information by an imaging device, but it is not information for a specific individual but information for general people at the location.

Therefore, the present invention provides an information display control device that can encode information by steganography and display it on electronic paper as needed without requiring a display space.

The apparatus of the present invention is configured to capture electronic paper including confidential information encoded by steganography with an imaging device specified in advance and receive the captured image, and the encoding based on the captured image. Decoding means for decoding the received information, and transmission means for transmitting the decoded information to the electronic paper so that the visible information decoded by the decoding means is displayed on the electronic paper. Is displayed on the electronic paper.

The receiving unit also includes an encoding unit that receives a captured image obtained by capturing the information displayed on the electronic paper, encodes the captured image into code information by steganography, and the transmission unit further includes the encoding process. In order to include the code information encoded by the image information of the electronic paper, the code information is transmitted to the electronic paper. With this configuration, the information displayed on the electronic paper is unnecessary. In such a case, it is possible to keep it secret.

Furthermore, the electronic paper is used as an electronic postcard, the display image at the time of reply is encoded as a steganography and written on the electronic postcard, the display image at the time of outgoing communication is displayed and transmitted on the electronic postcard, and the electronic postcard is imaged by an imaging device. The code information is decoded into a reply image, the image information displayed on the electronic postcard is encoded and concealed, and the same electronic postcard is used as a reply postcard.

1 is a system configuration diagram of an information display device according to a first embodiment. It is a flowchart explaining the processing operation of Embodiment 1, and is a figure explaining the process which displays the information concealed on card-type electronic paper. It is a figure demonstrated by the example of a hotel card key as an example of electronic paper. It is a figure which shows the table structure of a use terminal and a user table. It is a figure which shows the table structure of a decoding / encoding table. It is a figure which shows the state in which the image data of "departure date" are not displayed on a hotel card key. It is a figure which shows the state by which "room number" and "departure date" were displayed on the hotel card key. It is a flowchart explaining the processing operation of Embodiment 1, and is a figure explaining the process which conceals the information displayed on the hotel card key. It is a figure which shows the example of the round-trip postcard used today. It is a figure explaining the system configuration | structure of Embodiment 2. FIG. 10 is a flowchart for explaining a processing operation of the second embodiment.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
(Embodiment 1)
FIG. 1 is a configuration diagram of the information display control device of the present embodiment.

In FIG. 1, the information display control device 1 includes a card-type electronic paper 2, an environmental device 3, and a server processing unit 4. The card-type electronic paper 2 includes an image memory 5, an image composition unit 6, an image writing unit 7, and an image display unit 8. The image memory 5 stores image data m corresponding to the use of the card-type electronic paper 2. For example, when the card-type electronic paper 2 is used as a hotel card key, the use of a hotel name or a basic card key is used. Image data such as a method is stored.

The image composition unit 6 performs composition processing of the image data m stored in the image memory 5 and image data (L (i, j)) transmitted from the server processing unit 4 described later. The image writing unit 7 writes the image data (m + (L (i, j))) synthesized by the image synthesizing unit 6. The image display unit 8 displays the image data transferred from the image writing unit 7 on the card-type electronic paper 2.

On the other hand, the environmental device 3 is, for example, a communication device with a camera or an imaging device. The imaging device 10 captures an image displayed on the image display unit 8, and data captured by the imaging device 10 is sent to the server processing unit 4. The transmission unit 11 is configured to transmit.

The server processing unit 4 includes a receiving unit 12, a use terminal determination unit 13, a decode / encode unit 14, and an information acquisition unit 15, and a use terminal / user table 16 is connected to the use terminal determination unit 13 for decoding and encoding. A decoding / encoding table 17 is connected to the unit 14, and an internal storage information storage unit 18 and an external storage information storage unit 19 are connected to the information acquisition unit 15.

The receiving unit 12 receives the image data transmitted from the transmitting unit 11 of the environmental device 3 and sends it to the use terminal determining unit 13. The user terminal determination unit 13 refers to the user terminal / user table 16 based on the transferred image data, reads the corresponding user terminal and user information, and outputs the information to the decoding / encoding unit 14.

The decoding / encoding unit 14 performs a decoding process or an encoding process on the transferred image data with reference to the decoding / encoding table 17 and sends the image data to the information acquisition unit 15. In the information acquisition unit 15, the internal storage information storage unit 18 and the external storage information storage unit 19 are searched based on the decoded or encoded information, and corresponding image data or mask data is acquired. Forward to 6.

In the basic configuration described above, the processing operation of this example will be described below.
FIG. 2 is a flowchart for explaining the processing operation of this example, and the processing for displaying the information concealed on the card-type electronic paper 2 will be explained. Further, the card-type electronic paper 2 used in this example will be described below with an example of a hotel card key shown in FIG. The example shown in the figure is a state where “room number” and “departure date” are encoded in the hotel card key 21 by steganography, and confidential information is not exposed to human eyes. At this time, the above-mentioned image m and “arrival date” are displayed on the hotel card key 21, and the information of “room number” and “departure date” concealed by steganography is a code (Encode-P (i, j Embedded as)). Note that i is information specifying a user of a hotel, for example, and j is an attribute number of an object such as “room number” or “departure date”.

In this state, first, the image display unit 22 of the hotel card key 21 shown in FIG. 3 is photographed by the imaging device 10, and the photographed image data D (k) is transmitted from the transmission unit 11 to the server processing unit 4 (step ( Hereinafter, indicated by S) 1).

Next, when receiving the image data D (k), the receiving unit 12 of the server processing unit 4 transmits the image data D (k) to the use terminal determining unit 13. At this time, the camera information Cam (k) of the imaged imaging device 10 is also input to the receiving unit 12, and the transmitting unit 11 also transmits this information to the using terminal determining unit 13 via the receiving unit 12. The use terminal determination unit 13 uses this information to refer to the use terminal / user table 16 to determine the use terminal and the user (S2).

Here, FIG. 4 shows a table configuration example of the user terminal / user table 16, and the user terminal / user table 16 includes a combination of the user of the hotel card key 21 (card-type electronic paper 2) and the user terminal. For example, an imaging device “Cam (k)” which is a usable terminal corresponding to the ID “EPaper (i)” of the hotel card key 21 is registered. For example, in this example, the imaging device “Cam (3), (5)” is registered as a use terminal that can use the ID “EPaper (1)” of the hotel card key 21, and the ID “EPaper (2) of the hotel card key 21 is used. The imaging device “Cam (1), (2), (3)” is registered as a use terminal that can use “)”.

The correspondence between the hotel card key 21 and the use terminal (camera number) is set when the hotel card key 21 is handed over to the user. For example, in order to display the room number, the use card is provided near the front. , Cam (3) is installed, and Cam (5) is installed in the elevator.

Therefore, for example, in order to know the “room number”, the user having the hotel card key 21 with the ID “EPaper (1)” deceives the hotel card key 21 at the terminal (Cam (3)) near the front, and the image data When D (k) is acquired, information on the imaging device “Cam (3)” is also received by the server processing unit 4 (reception unit 12) together with the image data D (k), and the use terminal determination unit 13 performs determination. . In this case, the determination (S2) is YES. On the other hand, when a use terminal that does not correspond to the ID of the hotel card key 21 is used, the use terminal determination unit 13 determines NO (S2 is NO).

Next, the decoding / encoding unit 14 decodes the image data D (k) imaged by the imaging device 10 (S3). This process is a process for recognizing the code (Encode-P (i, j)) embedded in the image data D (k), and is performed with reference to the decode / encode table 17. Here, FIG. 5 is a diagram showing a configuration example of the decode / encode table 17. When the code (Encode-P (1,1)) is “1”, for example, data (Data (1)) is registered. When the code (Encode-P (1,1)) is “2”, for example, the data (Data (2)) is registered, and the same applies to the code (Encode-P (i, j)). Data is registered.

Here, data (Data (1)), data (Data (2)), etc. are information linked to the specific image data of the object attribute number j, for example, a hotel card key held by user i For data No. 21, data (Data (1)) is link information to “room number” of object number 1 (j = 1), and data (Data (2)) is “departure of object number 2 (j = 2)” Link information to "day".

The decode / encode unit 14 acquires the decoded data P (i, j) corresponding to the code (Encode-P (i, j)) (S4). Then, the information acquisition unit 15 acquires the image data (L (I, j)) indicated by this P (i, j) (S5). This image data (L (i, j)) is acquired by using P (i, j), for example, by searching the internal storage information storage unit 18 or the external storage information storage unit 19 to obtain P (i, j). The image data (L (i, j)) corresponding to is acquired. The image data (L (i, j)) is, for example, specific image data of “room number” and specific image data of “departure date”.

Next, the image data (L (I, j)) acquired by the information acquisition unit 15 is transmitted from the information acquisition unit 15 to the image composition unit 6 of the hotel card key 21 (card-type electronic paper 2). This transmission process is also performed while the user is hesitating the hotel card key 21 to the user terminal (imaging device 10).

The image composition unit 6 performs composition processing of the image m and the image data (L (i, j)) recorded in the image memory 5 (S6). For example, in the case of the example shown in FIG. 3, the image data (L (i, j)) that is “room number” is combined with the original image data and the image data of “arrival date”.

Thereafter, an image writing process is performed by the image writing unit 7 (S7), and a composite image is displayed on the image display unit 8 (S8). The display state of the hotel card key 21 shown in FIG. 6 shows a state in which the image data of “room number” is displayed from the state shown in FIG.

Accordingly, the holder of the hotel card key 21 captures the information on the “room number” necessary for entering the room, for example, by using terminals (Cam (3), Cam (5)) installed near the front or in the elevator. Then, the “room number” can be displayed on the hotel card key 21.

Further, in FIG. 7, the “departure date” code-displayed by steganography is captured by the imaging device 10 in the same manner as described above, and is decoded into corresponding image data (L (i, j)) by the server processing unit 4. Thereafter, the image is combined by the image combining unit 6 and displayed on the image display unit 8.

Therefore, according to the present example, the hotel card key 21 does not display the information required by the user until immediately before, so that the confidential information is securely protected, and according to the user's needs. Information necessary for the hotel card key 21 can be displayed and used.

On the other hand, FIG. 8 is a flowchart for explaining processing for concealing displayed information. For example, conversely to the above, it is a process of concealing the display of “room number” and “departure date” from the display state of FIG. 6 or FIG. 7, and there is information that is not necessary for the user or there are users. This is a process of concealing information that is not necessary at a place.

Also in this case, first, the image display unit 22 of the hotel card key 21 in the display state of FIG. 6 or FIG. 7 is imaged by the imaging device 10, and the captured image data D (k) and information of the imaging device 10 are transmitted from the transmission unit 11. It is transmitted to the server processing unit 4 (hereinafter referred to as ST) 1).

Next, the receiving unit 12 of the server processing unit 4 transmits the above information to the use terminal determination unit 13 and makes a decision on the use terminal and the user with reference to the use terminal / user table 16 (ST2). As described above, in the use terminal / user table 16, combination information of use terminals is registered corresponding to the ID of the hotel card key 21 possessed by the user. For example, the ID “EPaper (1) of the hotel card key 21 is registered. If the user terminal corresponding to “)” is the imaging device “Cam (3)” (YES in ST2), the decoding / encoding unit 14 performs an encoding process of the image data D (k) (ST3).

This process is a process for recognizing the pattern code (Encode-R (i, j)) embedded in the image data D (k) contrary to the above-described decoding process. Refer to. For example, in the example described above, R (i, j) corresponding to the data (Data (1)) of “room number” is acquired in the hotel card key 21 held by a certain user i (ST4). Further, R (i, j) corresponding to the data of “departure date” (Data (2)) is acquired.

This information is transmitted to the information acquisition unit 15 to acquire mask data (Mask-L (i, j)) indicated by R (i, j) (ST5).
Next, the mask data (Mask-L (i, j)) acquired by the information acquisition unit 15 is transferred from the information acquisition unit 15 to the image composition unit 6 of the tricked hotel card key 21 (card-type electronic paper 2). The mask data (Mask-L (i, j)) is overwritten on the image data (L (i, j)) (ST6). Thereafter, an image writing process by the image writing unit 7 is performed, and a composite image is displayed on the image display unit 8 (ST7). For example, in the example shown in FIG. 7, the original image data (L (i, j)) is overwritten with mask data (Mask-L (i, j)), and the display of “departure date” is concealed. The display shown in FIG. In the example shown in FIG. 6, mask data (Mask-L (i, j)) is written in the original image data (L (i, j)), and the display of “room number” is also concealed. 3 can be displayed.

As described above, according to the present example, information is kept secret in the hotel card key 21 until the user needs it, the image is picked up by the imaging device 10 according to the user's need, and the necessary information is displayed in the hotel card key 21. Is displayed.

That is, according to this example, in electronic paper such as a hotel card key, it is concealed as code information by steganography until the user needs it, and it is captured by the imaging device as needed by the user, and the necessary information is decoded. And displayed on the electronic paper. By configuring in this way, information is normally kept secret and can be displayed and used when necessary.

In addition, a use terminal (imaging device 10) is provided in the card mounting section of the room to conceal the information of the “room number”, and to the hotel card key 21 the blame route required after entering the room, the facility guidance information in the hall, etc. It can also be configured to display.

The card-type electronic paper 2 (hotel card key 21) is written to the card-type electronic paper 2 at the timing when the card-type electronic paper 2 (hotel card key 21) is brought close to the imaging device 10, and the card-type electronic paper 2 is released from the card-type electronic paper 2 imaging device 10 at the timing. A configuration may be adopted in which the information in the electronic paper 2 is erased and the default display by steganography is restored. The card-type electronic paper 2 is configured to hold written information in a state where the imaging device 10 is separated.

In the description of this example, the hotel card key 21 is described as the card-type electronic paper 2, but it may be applied to a credit card or a cash card. In this case, the balance, transfer information, and a code indicating access to electronic transactions are written as steganographic information on a credit card, etc., and if necessary, captured by a camera installed in a mobile phone or PDA (personal digital assistant), etc. Information or information from a link destination may be acquired and the balance, transfer information, or the like may be displayed on a credit card or cash card (card-type electronic paper).

Also, apply electronic paper to rental video membership cards and library rental cards. For example, at the timing of rental video stores and library rental scans, the return date and rental history should be displayed on the above membership cards and rental cards. Also good. Further, when returning, the return date and the rental history may be erased, and a default display or a new video or new book introduction display may be displayed.

Furthermore, you may apply the information display control apparatus of this example to the test | inspection table | surface at the time of the examination around a hospital. In this case, a code indicating personal information may be recorded as stegano information, and a guide map to the next inspection location, a waiting time, etc. may be displayed at the timing when a certain inspection is completed and recorded. In this case, the stegano information may be a doctor or a user's mobile phone registered in advance as a use terminal.
(Embodiment 2)
Next, Embodiment 2 of the present invention will be described.

FIG. 9 is an example of a round-trip postcard used today. FIG. 9A shows the front side of the reply postcard, FIG. 9B shows the back side of the reply postcard, FIG. 9C shows the front side of the outgoing postcard, and FIG. d indicates the reverse side of the outgoing postcard. As described above, the return postcard used today has the address and name of the recipient on the front of the outgoing postcard, the contents on the back, and the address and name of the sender on the front of the reply postcard. The contents of the reply are written on the back side, and the confidentiality of the information is not considered at all. It is also disposable and no consideration is given to ecology.

Therefore, in this example, electronic paper in which the written contents of a postcard such as an address are encoded and embedded by steganography is used for a round-trip postcard.
FIG. 10 is a diagram showing a system configuration of this example. The system of this example includes a source processing unit 30 and a destination processing unit 31, and the source processing unit 30 includes a mode input unit 32, a mode storage unit 33, an input unit 34, a mode determination unit 35, and an encoding & tag addition unit. 36, a tag execution & display unit 37, a display confirmation unit 38, and a transmission unit 39. The destination processing unit 31 includes a receiving unit 40, a display unit 41, an image acquisition unit 42, a stegano recognition unit 43, a decode / encode unit 44, and a display unit 45.

First, the processing of the source processing unit 30 will be described. The mode input unit 32 performs mode input for displaying information on a reciprocating postcard (hereinafter referred to as an electronic postcard) realized by electronic paper. Here, for example, mode 1 (m = 1) is a mode in which information is displayed both at the source and the destination. Mode 2 (m = 2) is a mode in which information is displayed at the source and not displayed at the destination, and mode 3 (m = 3) is a mode in which information is displayed at the destination and not displayed at the source.

FIG. 11 is a diagram showing the configuration of the electronic postcard. FIG. 11A shows a display state at the time of outgoing communication, and FIG. 11B shows a display state at the time of reply. In the configuration of this electronic postcard, the information corresponding to the mode 1 (m = 1) is a title display of “Meeting for the past” displayed on the back side at the time of outgoing and reply. The information corresponding to mode 2 (m = 2) includes the information on the postcard, postal code, postal address, name and address on the back, date and location displayed on the back, and membership fee information. is there. Furthermore, the information corresponding to mode 3 (m = 3) is information such as a reply postcard displayed on the front surface at the time of reply, a postal code, an address and name of the sender, and the presence / absence of attendance. The mode information input from the mode input unit 32 is stored in the mode storage unit 33.

Note that m3 ′ (shaded display) shown in FIG. 6A indicates information at the time of reply embedded as code information that cannot be visually recognized by steganography described later.
The input unit 34 is an information input unit that inputs specific information in correspondence with the above-described mode. For example, the title name, destination address, name, source address, and name of the above-mentioned “Okinoshino Shinkai” The date and place of the meeting, information on the membership fee, etc. are input as the input signal αi.

When the input signal αi is transmitted from the input unit 34, the mode determination unit 35 performs mode determination for each piece of information. For example, it is determined that the title name information of the above-mentioned “Meeting at the time of visiting” mode 1 (m = 1), and the information on the letters of the postcard, the postal code, the address and name of the destination, the date and time, the location, and the membership fee are mode 2. It is determined that (m = 2), and information such as reply postcard characters, postal codes, addresses and names of senders, presence / absence of attendance, etc. are determined as mode 3 (m = 3). Note that the determination performed by the mode determination unit 35 is performed according to, for example, setting a flag for each information, for example, by instructing mode designation when the user inputs each information.

The encode & tag adding unit 36 decodes each piece of information for which mode determination has been performed, and sets the corresponding tag. For example, a tag of TAG-NO (αik) is added to the information of the title name of “Meeting for the Past” determined as mode 1 (m = 1). Further, a tag of TAG-SG (αik) is added to the address, name, date, place, and membership fee information of the destination. Further, a tag of TAG-AF (αik) is added to information such as the address and name of the sender and the presence / absence of attendance.

The tag execution & display unit 37 displays information with the tag added. Information to be executed at this time is information to which TAG-NO (αik) and TAG-SG (αik) are added, and the display shown in FIG. 11A is performed. In other words, a message postcard, a postal code, a destination address, and a name are displayed on the surface of the electronic postcard. In addition, on the back of the electronic postcard, the title name of “Meet the Past”, the date and place of the meeting, and information on the membership fee are displayed.

The display confirmation unit 38 is a process for confirming the display state. For example, when the display state shown in FIG. 11A is confirmed, the outgoing electronic postcard layout is OK and is transmitted to the destination by the transmission unit 39. The

Next, when receiving the electronic postcard, the destination processing unit 31 (receiving unit 40) confirms the display of the electronic postcard (display unit 41), and the image acquisition unit 42 images the front and back surfaces of the electronic postcard, A captured image is acquired. At this time, TAG-AF (αik) encoded as steganography is also read in this captured image, and the stegan code is cut out by the stegan recognition unit 43.

The decoding / encoding unit 44 decodes the TAG-AF (αik) and extracts information such as reply postcard characters, postal code, sender address and name, presence / absence of attendance, and the like. The decoding / encoding unit 44 encodes TAG-SG (αik).

As a result of the above processing, information such as reply postcard characters, postal code, address and name of the sender, presence / absence of attendance, etc. are displayed on the display unit 45 by decoding TAG-AF (αik). The (αik) encoding process erases the postcard characters, postal code, destination address and name, date and location, and membership fee information. Accordingly, the display is as shown in FIG. 11B, where the address and name of the sender are displayed on the front surface of the electronic postcard, and the presence / absence display, address and name are displayed on the back surface.

By processing as described above, when using an electronic postcard for outgoing communications, information such as the address and name of the sender and the presence / absence of attendance are kept secret. When using an electronic postcard for replying, the address and name of the destination The date, place, and membership fee information is kept secret, and only necessary information can be displayed on the electronic postcard.

Also, electronic postcards, which are electronic paper, can be reused, and resources can be effectively used from the viewpoint of ecology in recent years.
In the description of the present embodiment, the stamp portion is not coded by steganography, but can be coded in the same way.

In the description of the present embodiment, an example in which electronic paper is used for a reciprocal postcard has been described. However, in a normal postcard, only the address and name of the destination are displayed, and the text on the postcard is encoded by steganography. The information may be sent to the other party in a concealed state, and the stegano code may be decoded and displayed on the electronic postcard.

Also, a configuration for realizing postcard type direct mail with electronic paper may be adopted. In this case, for example, when it is desired to request a document for the sent electronic paper (direct mail), information encoded by steganography can be displayed and returned to the address of the sender.

Claims (15)

A receiving unit that receives a captured image of electronic paper including information encoded by steganography;
A decoding unit that decodes the encoded information based on the captured image;
A transmission unit that transmits the decoded information to the electronic paper in order to display the visible information decoded by the decoding unit on the electronic paper;
An information display control device comprising: The receiving unit also has an encoding unit that receives a captured image obtained by capturing information displayed on the electronic paper and encodes the captured image into code information by steganography,
The information display control device according to claim 1, wherein the transmission unit transmits the code information to the electronic paper so that the code information encoded by the encoding process is included in the image information of the electronic paper. . The information display control apparatus according to claim 1, wherein the electronic paper has an image memory, and the decoding information is combined with data stored in the image memory and displayed on the electronic paper. 3. The information display control device according to claim 2, wherein the electronic paper has an image memory, and the code information is combined with data stored in the image memory and displayed on the electronic paper. A usable imaging device is set in advance based on user information of the electronic paper, and only a captured image obtained by imaging the electronic paper by the imaging device is valid. 3. The information display control device according to 3 or 4. 6. The information display according to claim 1, wherein the visible information decoded by the decoding unit is acquired from external storage information connected to the apparatus via a network. apparatus. Write information to the electronic paper when the electronic paper is close to the imaging device, and erase the electronic paper information and return to the default display by steganography when the electronic paper is separated from the imaging device. The information display control device according to claim 1, wherein 3. The information display control device according to claim 1, wherein the electronic paper holds the written information in a state where the imaging device is separated. A reception process for receiving a captured image obtained by imaging electronic paper including information encoded by steganography;
A decoding process for decoding the encoded information based on the captured image;
A transmission process for transmitting the decode information to the electronic paper in order to display the visible information decoded by the decoding process on the electronic paper;
The information display control method characterized by performing. The reception process receives a captured image obtained by capturing information displayed on the electronic paper, and performs an encoding process for encoding the captured image into code information by steganography,
10. The information display control method according to claim 9, wherein the transmission process transmits the code information to the electronic paper so that the code information encoded by the encoding process is included in the image information of the electronic paper. . A reception process for receiving a captured image obtained by imaging electronic paper including information encoded by steganography;
A decoding process for decoding the encoded information based on the captured image;
A transmission process for transmitting the decode information to the electronic paper in order to display the visible information decoded by the decoding process on the electronic paper;
For causing an information processing apparatus to execute the program. The reception process receives a captured image obtained by capturing information displayed on the electronic paper, performs an encoding process for encoding the captured image into code information by steganography, and the transmission process is encoded by the encoding process. 12. The program according to claim 11, wherein the code information is transmitted to the electronic paper so that the code information is included in the image information of the electronic paper. A receiving unit that receives a captured image obtained by capturing electronic paper including information on a display image and information encoded by steganography;
A decoding unit that decodes the encoded information based on the captured image;
An encoding unit that encodes information of the display image into code information by steganography;
A transmission unit that transmits the code information and the image information to the electronic paper in order to display the code information decoded by the decoding unit and the image information encoded by the encoding information on the electronic paper;
An information display control device comprising: The electronic paper is an electronic postcard, the information of the display image is a display image at the time of outgoing message displayed on the electronic postcard, and the code information is code information of a display image at the time of reply displayed on the electronic postcard. The information display control apparatus according to claim 13. A receiving unit that receives a captured image obtained by capturing an electronic postcard including information on a display image and information encoded by steganography;
A decoding unit that decodes the encoded information based on the captured image;
An encoding unit that encodes information of the display image into code information by steganography;
A transmission unit that transmits the code information and the image information to the electronic postcard so that the code information decoded by the decoding unit and the image information encoded by the encoding information are displayed on the electronic postcard;
An information display control device comprising:

Images