JP2013125503A - Screen substitution device, screen transfer system and program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To discriminate whether a terminal functions as a server terminal or a client terminal by watching a screen of the terminal.SOLUTION: In a screen substitution device, when inclusion of a determination result by determination means is indicated, first rectangular information indicating rectangular coordinates of substitution source image data coinciding with image data received out of the substitution source image data stored and second rectangular information indicating rectangular coordinates of image data coinciding with the substitution source image data stored out of the image data received are generated. In substitution means of the screen substitution device, image data of a rectangular coordinates portion indicated by the second rectangular information generated out of the image data received is substituted for substitution image data of a rectangular coordinates portion indicated by the first rectangular information generated out of the substitution image data stored.

Description

  Embodiments described herein relate generally to a screen replacement device, a screen transfer system, and a program.

  There is a remote desktop technology for operating a remote server terminal from a client terminal. This remote desktop technology is a technology that enables a client terminal to operate a remote server terminal by transmitting input / output data of the remote server terminal as digital data to the client terminal via a network.

  In this remote desktop technology, while the client terminal operates the server terminal, a notation indicating that the server terminal is operated by the client terminal is displayed on the screen of the server terminal.

JP 2010-250615 A

  However, in the remote desktop technology as described above, while the client terminal is operating the server terminal, the same screen as that of the server terminal is displayed on the screen of the client terminal. For this reason, in a terminal that not only functions as a client terminal but also functions as a server terminal, it is determined whether the terminal operates the server terminal as a client terminal or the client terminal as a server terminal. There is an inconvenience that it cannot be determined just by looking at the screen.

  The problem to be solved by the present invention is to provide a screen replacement device, a screen transfer system, and a program that can determine whether the terminal functions as a server terminal or a client terminal by looking at the screen of the terminal. With the goal.

  The screen replacement device of the embodiment replaces at least a part of the image data transmitted from the screen transfer device with another image data.

  The replacement source image storage means of the screen replacement device is replacement source image data indicating image data that can be replaced with another image data among the image data transmitted from the screen transfer device, wherein the screen transfer device The replacement source image data indicating is stored.

  The replacement image storage means of the screen replacement device stores replacement image data indicating image data that can be replaced with the stored replacement source image data.

  The screen replacement device receives image data transmitted from the screen transfer device.

  In the determination unit of the screen replacement device, the received image data is compared with the stored replacement source image data so that the image data that matches the replacement source image data is the received image. It is determined whether it is included in the data.

  In the screen replacement device, when indicating that the result of determination by the determination means is included, a rectangle of replacement image data that matches the received image data among the stored replacement image data First rectangular information indicating coordinates, and second rectangular information indicating rectangular coordinates of image data that matches the stored replacement source image data among the received image data are generated.

  In the replacement means of the screen replacement device, the image data of the rectangular coordinate portion indicated by the generated second rectangular information in the received image data is replaced with the image data in the stored replacement image data. Replacement is performed with replacement image data of the rectangular coordinate portion indicated by the generated first rectangular information.

  The screen replacement device outputs the image data replaced by the replacement means to a display device.

1 is a schematic diagram illustrating a schematic configuration example of a screen transfer system including a screen replacement device according to an embodiment. It is a schematic diagram which shows the structural example of the screen transfer system containing the screen replacement apparatus which concerns on the embodiment. It is a schematic diagram which shows an example of the replacement original image data memorize | stored in the replacement original image memory | storage part which concerns on the embodiment. It is a schematic diagram which shows an example of the rectangular information produced | generated by the image detection part which concerns on the embodiment. It is a flowchart which shows an example of operation | movement of the screen replacement apparatus which concerns on the same embodiment. An example of the replacement source image indicated by the replacement source image data stored in the replacement source image storage unit according to the embodiment and the replacement image indicated by the replacement image data stored in the replacement image storage unit according to the embodiment It is a schematic diagram which shows an example. It is a schematic diagram which shows an example of the replacement process by the image replacement part which concerns on the embodiment. It is a mimetic diagram for explaining the modification of the screen substitution device concerning the embodiment. It is a schematic diagram which shows an example of the replacement origin rectangle information memorize | stored in the replacement origin rectangle information storage part which concerns on the embodiment. It is a schematic diagram which shows an example of the logic of the coordinate matching process based on the replacement source rectangle information memorize | stored in the replacement source rectangle information storage part which concerns on the embodiment.

  FIG. 1 is a schematic diagram illustrating a schematic configuration example of a screen transfer system including a screen replacement device according to an embodiment, and FIG. 2 illustrates a configuration example of a screen transfer system including a screen replacement device according to the embodiment. It is a schematic diagram. The screen transfer system 1 includes a screen transfer device 10 and a screen replacement device 20, and the screen transfer device 10 and the screen replacement device 20 are connected via a network. In this embodiment, the screen transfer device 10 is a terminal operated by the screen replacement device 20 during remote desktop processing (that is, the terminal on the side where the screen replacement device 20 operates the screen transfer device 10). Is).

  The screen transfer apparatus 10 includes a monitor unit 11, a screen display unit 12, a screen transfer unit 13, and a communication unit 14, as shown in FIG.

  The monitor unit 11 is, for example, a display device such as a liquid crystal display or a cathode ray tube. When the monitor unit 11 receives an input of a video signal output from the screen display unit 12, the monitor unit 11 displays an image corresponding to the video signal.

  When the screen display unit 12 receives image data generated by an application operating on an OS (Operating System) having a graphical user interface (GUI) subsystem, the screen display unit 12 displays the received image data on the screen. The data is output to the transfer unit 13. The screen display unit 12 converts the received image data into a video signal, and then outputs the video signal to the monitor unit 11.

  The image data includes width information indicating the width of the image displayed on the monitor unit 11 using the number of pixels, height information indicating the height of the image using the number of pixels, and the image data. At least pixel information including position information indicating the positions of the plurality of pixels and color information indicating the color tone of each pixel.

  When receiving the input of the image data output from the screen display unit 12, the screen transfer unit 13 converts the image data into a screen transfer message. Specifically, when receiving the input of the image data output from the screen display unit 12, the screen transfer unit 13 compresses (reversibly compresses) the image data and generates a screen transfer message. Further, when the screen transfer unit 13 generates a screen transfer message (that is, when image data is converted into a screen transfer message), the screen transfer unit 13 transmits the screen transfer message to the screen replacement device 20 via the communication unit 14.

  As shown in FIG. 2, the screen replacement device 20 includes a communication unit 21, a transfer screen reception unit 22, a display image replacement unit 23, a screen display unit 24, and a monitor unit 25. An original image storage unit 231, a replacement image storage unit 232, an image detection unit 233, and an image replacement unit 234 are further included.

  The transfer screen receiving unit 22 receives the screen transfer message transmitted from the screen transfer device 20 via the communication unit 21. The transfer screen receiving unit 22 converts the received screen transfer message into original image data (that is, image data output from the screen display unit 12 to the screen transfer unit 13) again, and converts the image data into a display image. The image is output to the image detection unit 233 in the replacement unit 23. Specifically, the transfer screen receiving unit 22 decompresses the received screen transfer message, converts the screen transfer message into the original image data, and then outputs the image data to the image detection unit 233.

  Here, the replacement source image storage unit 231, the replacement image storage unit 232, the image detection unit 233, and the image replacement unit 234 in the display image replacement unit 23 will be described.

  The replacement source image storage unit 231 is replacement source image data indicating image data that can be replaced with other image data among the image data output from the transfer screen reception unit 22, and indicates the screen transfer device 10. Image data is stored in advance.

Incidentally, FIG. 3 shows an example of the replacement source image data stored in the replacement source image storage unit 231, for example, the image indicated by the replacement source image data D _1, the width of the 400 pieces of pixel and pixel 200 It is an image that has a height corresponding to the number of pixels and whose positions and color tones are defined in detail by pixel information “00000000,00ffffff, 00ffffff,...”.

  The replacement image storage unit 232 stores replacement image data indicating image data that can be replaced with the replacement source image data stored in the replacement source image storage unit 231 in advance. Since the replacement image data is stored in the replacement source image storage unit 232 in the same format as the replacement source image data, detailed description thereof is omitted here.

  The replacement source image data stored in the replacement source image storage unit 231 and the replacement image data stored in the replacement image storage unit 232 are associated with each other and stored in the storage units 231 and 232.

  The image detection unit 233 compares the image data output from the transfer screen reception unit 22 with the replacement source image data stored in advance in the replacement source image storage unit 231, thereby matching the replacement source image data. It is detected (determined) whether the data is included in the output image data. When the image detection unit 233 indicates that the determination result is included, the image data output from the transfer screen reception unit 22 among the replacement source image data stored in the replacement source image storage unit 231. First rectangular information indicating the rectangular coordinates of the replacement source image data that matches, and a second rectangle indicating the rectangular coordinates of the image data that matches the stored replacement source image data among the output image data And information.

  Specifically, the image detection unit 233 stores the pixel information (hereinafter referred to as first pixel information) in the image data output from the transfer screen reception unit 22 and the replacement source image storage unit 231 in advance. Whether pixel information that matches the second pixel information is included in the first pixel information by comparing the pixel information in the replacement source image data (hereinafter referred to as second pixel information). Determine whether or not. Further, when the image detection unit 233 indicates that the determination result is included, the replacement source that matches the image indicated by the first pixel information among the replacement source images indicated by the second pixel information. Of the image indicated by the first rectangular information indicating the rectangular coordinates of the image and the first pixel information, the second indicating the rectangular coordinates of the image matching the replacement source image indicated by the second pixel information. Rectangle information is generated.

  Note that when the image detection unit 233 generates the first rectangular information and the second rectangular information, the image detecting unit 233 writes the generated first rectangular information and second rectangular information in a memory (not shown). Specifically, as illustrated in FIG. 4, the image detection unit 233 includes the first rectangular information “(xa0, ya0)-(xa1, ya1)” and the second rectangular information “(xb0, yb0)-( xb1, yb1) ”and write to a memory (not shown).

  The image replacement unit 234 stores, in the replacement image storage unit 232, image data of the rectangular coordinate portion indicated by the second rectangular information generated by the image detection unit 233 among the image data output from the transfer screen reception unit 22. Of the replacement image data stored in advance, replacement with the replacement image data of the rectangular coordinate portion indicated by the first rectangular information generated by the image detection unit 233 is performed. Further, when the replacement process is executed, the image replacement unit 234 outputs the image data after the replacement process is executed to the screen display unit 24.

  Specifically, the image replacement unit 234 is indicated by the second rectangular information generated by the image detection unit 233 among the images indicated by the first pixel information in the image data output from the transfer screen reception unit 22. Among the replacement images indicated by the pixel information in the replacement image data stored in advance in the replacement image storage unit 232, the rectangle indicated by the first rectangular information generated by the image detection unit 233. Replace with the replacement image of the coordinate part.

  When the screen display unit 24 receives the input of the image data output from the image replacement unit 234 in the display image replacement unit 23, the screen display unit 24 converts the image data into a video signal and then outputs the video signal to the monitor unit 25.

  The monitor unit 25 is, for example, a display device such as a liquid crystal display or a cathode ray tube. When the monitor unit 25 receives an input of a video signal output from the screen display unit 24, the monitor unit 25 displays an image corresponding to the video signal.

  Next, the operation of the screen replacement device as described above will be described with reference to the flowchart of FIG. 5 and schematic diagrams of FIGS.

  However, it is assumed that the replacement source image storage unit 231 and the replacement image storage unit 232 store replacement source image data and replacement image data, respectively, as shown in FIG. The replacement source image data and the replacement image data are stored in the storage units 231 and 232 by the system administrator who manages the screen transfer system 1.

  First, the transfer screen receiving unit 22 receives the screen transfer message transmitted from the screen transfer device 10 via the communication unit 21 (step S1).

  Subsequently, the transfer screen receiving unit 22 decompresses the screen transfer message received in step S <b> 1, and sends the screen transfer message to the image data (from the screen display unit 12 in the screen transfer device 10 to the screen transfer unit 13 ( That is, after conversion to original image data), this image data is output to the image detection unit 233 (step S2).

  Next, when receiving the input of the image data output from the transfer screen reception unit 22, the image detection unit 233 compares the received image data with the replacement source image data stored in the replacement source image storage unit 231. Then, it is determined whether or not image data that matches the replacement source image data is included in the received image data (step S3).

  Specifically, when receiving the input of the image data output from the transfer screen reception unit 22, the image detection unit 233 stores the first pixel information in the received image data and the replacement source image storage unit 231. The second pixel information in the replaced original image data is compared, and it is determined whether or not pixel information that matches the second pixel information is included in the first pixel information. If the determination result in step S3 indicates NO (step S3: “No”), the image detection unit 233 outputs the received image data to the screen display unit 24, and the process in step S7 described later. Proceed to

  When indicating that the determination result of step S3 is included (step S3: “Yes”), the image detection unit 233 transfers the replacement source image data stored in the replacement source image storage unit 231. First rectangular information indicating the rectangular coordinates of the replacement source image data that matches the image data output from the screen receiving unit 22, and an image that matches the stored replacement source image data among the output image data Second rectangular information indicating the rectangular coordinates of the data is generated (step S4).

  Specifically, the image detection unit 233 is output from the transfer screen reception unit 22 among the replacement source images indicated by the second pixel information in the replacement source image data stored in the replacement source image storage unit 231. First rectangular information “(xa0, xb0)-(xa1, xb1)” indicating the rectangular coordinates of the replacement source image that matches the image indicated by the first pixel information in the image data, and the first pixel information Is generated, the second rectangular information “(xb0, yb0) − (xb1, yb1)” indicating the rectangular coordinates of the image that matches the replacement source image indicated by the second pixel information is generated. .

  Subsequently, the image replacement unit 234 stores the image data of the rectangular coordinate portion indicated by the second rectangular information generated by the image detection unit 233 among the image data output from the transfer screen reception unit 22, as a replacement image storage. Of the replacement image data stored in the unit 232, replacement with the replacement image data of the rectangular coordinate portion indicated by the first rectangular information generated by the image detection unit 233 is performed (step S5).

  Specifically, as illustrated in FIG. 7A, the image replacement unit 234 includes the image detection unit 233 among the images indicated by the first pixel information in the image data output from the transfer screen reception unit 22. The image of the rectangular coordinate portion indicated by the second rectangular information “(xb0, yb0) − (xb1, yb1)” generated by the above is indicated by the pixel information in the replacement image data stored in the replacement image storage unit 232 Among the replacement images, the replacement is performed with the replacement image of the rectangular coordinate portion indicated by the first rectangular information “(xa0, xb0)-(xa1, xb1)” generated by the image detection unit 233.

  Note that, as shown in FIG. 7B, the image replacement unit 234 performs the same replacement process as in step S5 even when only a part of the replacement source image data is included in the image data.

  Next, the image replacement unit 234 outputs the image data after execution of the replacement process in step S5 to the screen display unit 24 (step S6).

  Subsequently, when receiving the input of image data, the screen display unit 24 converts the received image data into a video signal, and then outputs the video signal to the monitor unit 25 (step S7).

  After that, when receiving the input of the video signal output from the screen display unit 24, the monitor unit 25 displays an image corresponding to the video signal (step S8), and returns to the process of step S1.

  In this embodiment, the shape of the image indicated by the pixel information in the replacement source image data and the image indicated by the pixel information in the replacement image data are rectangular. However, the present invention is not limited to this. For example, As the shape of the image, a polygon or a circle can be applied.

  According to the embodiment described above, when it is determined whether or not the replacement source image data is included in the image data transmitted from the screen transfer device 10 and indicates that the result of this determination is included The image detection unit 233 that generates the first rectangular information and the second rectangular information, and the image data of the rectangular coordinate portion indicated by the second rectangular information are converted into the rectangular coordinate portion indicated by the first rectangular information. With the configuration including the image replacement unit 234 that replaces the replacement image data, the terminal functions as either a server terminal (screen transfer device 10) or a client terminal (screen replacement device 20) by looking at the screen of the terminal. Can be determined.

  Below, the modification of the screen replacement apparatus 20 which concerns on this embodiment is demonstrated.

[First Modification]
The display image replacement unit 23 in the screen replacement device 20 further includes an image size adjustment unit 235 (not shown) in addition to the replacement source image storage unit 231, the replacement image storage unit 232, the image detection unit 233, and the image replacement unit 234. May be.

  The image size adjustment unit 235 uses the replacement source image indicated by the pixel information in the replacement source image data stored in the replacement source image storage unit 231 and the pixel information in the replacement image data stored in the replacement image storage unit 232. It is determined whether or not the size of the displayed replacement image is the same. In addition, when the determination result indicates NO, the image size adjustment unit 235 adjusts the size of the replacement image so that the replacement image has the same size as the replacement source image, that is, enlarges or reduces the replacement image. To do.

  Specifically, as shown in FIG. 8, when the width of the replacement source image and the width of the replacement image are not the same, the image size adjustment unit 235 divides the width of the replacement source image by the width of the replacement image. (In other words, the width of the replacement image divided by the width of the replacement image) is calculated, and the width of the replacement image is enlarged according to the calculated magnification. The width of the replacement source image and the width of the replacement image are the width information in the replacement source image data stored in the replacement source image storage unit 231 and the width in the replacement image data stored in the replacement image storage unit 232. Derived from information.

  As described above, the configuration further including the image size adjustment unit 235 in the display image replacement unit 23 maintains the visibility on the monitor unit 25 even when the size of the replacement source image and the replacement image is not the same. Can do.

[Second Modification]
The display image replacement unit 23 in the screen replacement device 20 may include a replacement source rectangle information storage unit 236 (not shown) instead of the replacement source image storage unit 231.

  The replacement source rectangle information storage unit 236 indicates replacement source rectangle information indicating the rectangular coordinates of the image data to be replaced with the replacement image data stored in the replacement image storage unit 232 among the image data output from the transfer screen reception unit 22. Is stored in advance.

  Specifically, as shown in FIG. 9, the replacement source rectangle information storage unit 236 stores the replacement image storage unit 232 in the image indicated by the pixel information in the image data output from the transfer screen reception unit 22. The replacement source rectangle information indicating the rectangular coordinates of the image to be replaced with the replacement image indicated by the pixel information in the replaced image data is stored.

  In this case, when the image detection unit 233 receives the input of the image data output from the transfer screen reception unit 22, the rectangular coordinates indicated by the replacement source rectangular information stored in the replacement source rectangular information storage unit 236 are received. A coordinate matching process for determining whether or not the image data is included in the rectangular coordinates is executed.

  FIG. 10 is a schematic diagram illustrating an example of the logic of the coordinate matching process based on the replacement source rectangle information stored in the replacement source rectangle information storage unit. Here, when the “return detection” is reached, the coordinate matching process is performed. When the result is included and “return not detected” is reached, the result of the coordinate matching process indicates “no”.

  Further, when indicating that the result of the coordinate matching process is included, the image detection unit 233 generates first rectangular information and second rectangular information from the rectangular coordinates obtained during the coordinate matching process.

  In this way, with the configuration including the replacement source rectangular information storage unit 236 instead of the replacement source image storage unit 231, the image detection unit 233 includes the image data output from the transfer screen reception unit 22 and the replacement source image storage unit. The pixel matching process for comparing the replacement source image data stored in H.231 and determining whether the received image data includes image data that matches the replacement source image data can be omitted. Further, it is possible to further speed up the processing in the screen replacement device 20.

[Third Modification]
The display image replacement unit 23 in the screen replacement device 20 may include a replacement color tone information storage unit 237 (not shown) instead of the replacement image storage unit 232.

  The replacement color information storage unit 237 stores in advance replacement color information indicating color information that can be replaced with the color information included in the pixel information in the replacement image data stored in the replacement image storage unit 231.

  In this case, the image replacement unit 234 uses the rectangular coordinates indicated by the second rectangular information generated by the image detection unit 233 among the color tone information included in the pixel information in the image data output from the transfer screen reception unit 22. The color tone information included in the pixel information in the partial image data is replaced with the replacement color tone information stored in the replacement color tone information storage unit 237.

  As described above, the configuration provided with the replacement color information storage unit 237 instead of the replacement image storage unit 232 is stored in the replacement source image storage unit 231 even if there is no replacement image data stored in the replacement image storage unit 232. Since only the color tone of the replacement source image data can be replaced, the server terminal (screen transfer device 10) and the client terminal (screen replacement device 20) can be distinguished.

  In addition, although some embodiment of this invention was described, these embodiment is shown as an example and is not intending limiting the range of invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the scope of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.

  DESCRIPTION OF SYMBOLS 1 ... Screen transfer system, 10 ... Screen transfer apparatus, 11, 25 ... Monitor part, 12, 24 ... Screen display part, 13 ... Screen transfer part, 14, 21 ... Communication part, 20 ... Screen replacement apparatus, 22 ... Transfer screen Receiving unit, 23 ... display screen replacing unit, 231 ... replacement source image storage unit, 232 ... replacement image storage unit, 233 ... image detection unit, 234 ... image replacement unit, 235 ... image size adjustment unit, 236 ... replacement source rectangle information Storage unit, 237... Replacement color tone information storage unit.

Claims (4)

A screen replacement device that replaces at least part of image data transmitted from a screen transfer device with another image data,
Replacement source image storage for storing replacement source image data indicating image data that can be replaced with other image data among image data transmitted from the screen transfer device, and storing the replacement source image data indicating the screen transfer device Means,
Replacement image storage means for storing replacement image data indicating image data that can be replaced with the stored replacement source image data;
Means for receiving image data transmitted from the screen transfer device;
By comparing the received image data with the stored replacement source image data, it is determined whether or not image data matching the replacement source image data is included in the received image data. Determination means for determining;
When indicating that the result of determination by the determination means is included, the first rectangle indicating the rectangular coordinates of the replacement source image data that matches the received image data among the stored replacement source image data Means for generating information and second rectangular information indicating rectangular coordinates of image data that matches the stored replacement source image data among the received image data;
Of the received image data, the image data of the rectangular coordinate portion indicated by the generated second rectangular information is indicated by the generated first rectangular information of the stored replacement image data. Replacement means for replacing with the replacement image data of the rectangular coordinate portion to be
Means for outputting the image data replaced by the replacement means to a display device. The screen replacement device according to claim 1,
Means for determining whether or not the stored replacement source image data and the stored replacement image data have the same size;
And a means for adjusting the size of the replacement image so that the stored replacement image data has the same size as the stored replacement source image data when the result of the determination indicates NO. A screen replacement device. A screen transfer system including a screen transfer device and a screen replacement device that replaces at least part of image data transmitted from the screen transfer device with another image data,
The screen replacement device
Replacement source image storage for storing replacement source image data indicating image data that can be replaced with other image data among image data transmitted from the screen transfer device, and storing the replacement source image data indicating the screen transfer device Means,
Replacement image storage means for storing replacement image data indicating image data that can be replaced with the stored replacement source image data;
Means for receiving image data transmitted from the screen transfer device;
By comparing the received image data with the stored replacement source image data, it is determined whether or not image data matching the replacement source image data is included in the received image data. Determination means for determining;
When indicating that the result of determination by the determination means is included, the first rectangle indicating the rectangular coordinates of the replacement source image data that matches the received image data among the stored replacement source image data Means for generating information and second rectangular information indicating rectangular coordinates of image data that matches the stored replacement source image data among the received image data;
Of the received image data, the image data of the rectangular coordinate portion indicated by the generated second rectangular information is indicated by the generated first rectangular information of the stored replacement image data. Means for replacing with the replacement image data of the rectangular coordinate portion,
Means for outputting the image data replaced by the replacement means to a display device. A program for a screen replacement device that includes a replacement source image storage unit and a replacement image storage unit, and replaces at least a part of the image data transmitted from the screen transfer device with another image data,
Of the image data transmitted from the screen transfer device, replacement source image data indicating image data that can be replaced with another image data, wherein the replacement source image data indicating the screen transfer device is the replacement source image storage means Means to write on,
Means for writing replacement image data indicating image data replaceable with the written replacement image data into the replacement image storage means;
Means for receiving image data transmitted from the screen transfer device;
Whether the received image data includes image data that matches the replacement source image data by comparing the received image data with the written replacement source image data. Determining means for determining
When indicating that the result of determination by the determination means is included, a first coordinate indicating the rectangular coordinates of the replacement source image data that matches the received image data among the written replacement source image data Means for generating rectangular information and second rectangular information indicating rectangular coordinates of image data that matches the written replacement image data among the received image data;
Among the received image data, the image data of the rectangular coordinate portion indicated by the generated second rectangular information is converted into the generated first rectangular information from the written replacement image data. Means for replacing with the replacement image data of the rectangular coordinate portion shown,
Means for outputting the image data after being replaced by the replacing means to a display device;
Program to function as.

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