JP4450321B2 - Information processing system, client device, server device, stream type control method, program, and information recording medium - Google Patents

Description

  The present invention relates to an information processing system that transmits compressed image data between a server and a client, and more particularly, to control of a stream type during transmission of compressed image data between a server and a client.

  As a transfer protocol for compressed image data in a server / client environment, there is JPIP (JPEG2000 Interactive Protocol) for JPEG2000 compressed image data.

  In JPIP, as a stream type for transmitting compressed image data, JPP-stream (JPIP Precinct) for transmitting precinct division codes according to the code stream order, and JPT-stream for transmitting tile division codes according to the code stream order. (JPIP Tile-part) (see, for example, Patent Documents 1 and 2). Note that tiling of images is indispensable when JPT-stream is applied, but tiling is not indispensable when JPP-stream is applied.

  Conventionally, which stream type is used is uniquely determined between the client and the server (see, for example, Patent Document 1).

  Patent Document 1 describes an invention in which a partial code of JPEG 2000 compressed image data is received on the client side and integrated with a received code in a server / client environment.

JP 2003-23680 A "Information technology-JPEG2000 image coding system-Part9: Interactivity tools, APIs and Protocols", ISO / IEC FCD 15444-9.2, 2003-12-16, C.7.3 Image Return Type, D.2.16 Image Response Type (JPIP-type ) "Information technology-JPEG2000 image coding system-Part1", ISO / IEC FCD 15444-1, 2002-07-24, nnex B D.2.16 Image Response Type (JPIP-type)

  When the compressed image data is accessed remotely, there is a fundamental difference in the order in which the required code is sent, depending on whether the client (request source) displays or prints the image.

  When the precinct division code is transmitted by JPP-stream and sequentially expanded and displayed, the entire image (or the entire region of interest) is displayed from the beginning as shown in the upper part of FIG. 1, and the passage of time (t2, t3, t4) As a result, the image quality of the entire image is improved. Even if the image quality is low at the first stage, the outline of the entire image is known, and the image quality of the entire image (or the entire region of interest) is improved at an early point (see FIG. 2). This is suitable for the purpose of receiving and displaying compressed image data.

  On the other hand, when the tile division code of the same image is transmitted by JPT-stream and sequentially expanded and displayed, the upper left tile image is displayed at t1, and the upper right tile image is displayed at t2, as shown in the lower part of FIG. T3, the lower left tile image is displayed, and finally the entire image including the lower right tile image is displayed at t4. In this case, since the decompression process is executed in units of tiles, the same memory can be used for the decompression process of each tile, so that the required memory amount can be reduced. Since the code can be transmitted continuously in tile units, the transmission efficiency is also good. Also, when the tile image for one row arranged horizontally is expanded, printing for that portion is started, and the code of the next tile for the next column is received and expanded during this printing, and the expansion is completed. An efficient printing process can be performed by a procedure such as starting printing for that time. Therefore, JPT-stream is suitable for the purpose of receiving compressed image data from the server and printing or saving it, or uploading compressed image data from the client to the server.

  However, conventionally, for example, when a single-layer compressed image data is targeted on the client side and it is desired to display it without specifying the image quality (Quality), a request specifying the stream type as JPT-stream is issued and returned from the server. If the negotiated result is also JPT-stream, the server tries to respond to all tile data of the entire image (or the region of interest), so it takes a long time to display the entire image (or the entire region of interest) on the client side. There was a problem that it took time. Also, for example, when printing is desired on the client side, a request specifying JPP-stream is issued, and when the negotiation result returned from the server is also JPP-stream, the client side receives all the data of the entire image. There is also a problem that the printing process cannot be started until the expansion is completed.

  The present invention has been made in view of such a problem, and its main purpose is to execute the stream type at the time of transmission of compressed image data between the server and the client by the client in the server and client environment. By appropriately controlling according to the processing function (display, print, save, upload, etc.), display processing can be executed at high speed, and printing, save, upload, etc. can be executed at high speed with a small amount of memory. It is in.

  The invention of claim 1 is an information processing system for transmitting compressed image data between a client device and a server device, wherein the client device is selected by means for selecting a processing function to be executed and the means Means for notifying the server device of a processing function, and the server device determines a stream type at the time of transmission of compressed image data to and from the client device based on the processing function notified from the client device. An information processing system comprising: means for selecting; and means for notifying the client device of a stream type selected by the means.

  A second aspect of the present invention is the information processing system according to the first aspect of the present invention, wherein the compressed image data transmitted between the client device and the server device is JPEG2000 compressed image data. The means for selecting a stream type is an information processing system that selects JPP-stream as a stream type when the processing function notified from the client device is displayed.

  A third aspect of the present invention is the information processing system according to the first aspect of the present invention, wherein the compressed image data transmitted between the client device and the server device is JPEG2000 compressed image data. The means for selecting a stream type is an information processing system that selects JPT-stream as a stream type when the processing function notified from the client device is printing, saving or uploading.

  According to a fourth aspect of the present invention, there is provided an information processing system for transmitting compressed image data between a client device and a server device, wherein the client device is selected by means for selecting a processing function to be executed. Means for notifying the server device of a processing function and a stream type at the time of transmission of the compressed image data between the server device, and the server device is based on the processing function notified from the client device. It is determined whether or not the stream type notified from the client device needs to be corrected. When it is determined that correction is not necessary, the notified stream type is selected, and when it is determined that correction is necessary, the notified processing function is selected. Means for selecting another stream type based on the stream type, and the stream type selected by the means is selected from the client device. An information processing system, characterized in that it comprises a means for notifying to.

  A fifth aspect of the present invention is the information processing system according to the fourth aspect of the present invention, wherein the compressed image data transmitted between the client device and the server device is JPEG 2000 compressed image data. The means for selecting the stream type is notified of the display as a processing function from the client device, and when JPT-stream is notified as the stream type, it is determined that the stream type needs to be corrected. It is an information processing system characterized by selecting JPP-stream.

  A sixth aspect of the present invention is the information processing system according to the fourth aspect of the invention, wherein the compressed image data transmitted between the client device and the server device is JPEG2000 compressed image data, The means for selecting a stream type is notified of printing, saving or uploading as a processing function from the client device, and when JPP-stream is notified as a stream type, determines that the stream type needs to be corrected, The information processing system is characterized in that JPT-stream is selected as the stream type.

  A seventh aspect of the invention is an information processing system according to the first or fourth aspect of the invention, wherein compressed image data transmitted between the client device and the server device is JPEG2000 compressed image data, and the server The apparatus is an information processing system having means for converting the compressed image data into multi-layered compressed image data when the compressed image data to be transmitted to the client device is a single layer.

  The invention according to claim 8 is the information processing system according to claim 1 or 4, wherein the compressed image data transmitted between the client device and the server device is JPEG2000 compressed image data, and the server The apparatus is an information processing system having means for converting the compressed image data into single-layer compressed image data when the compressed image data to be transmitted to the client device is multi-layer.

  A ninth aspect of the present invention is the information processing system according to the first or fourth aspect of the present invention, wherein the compressed image data transmitted between the client device and the server device is JPEG2000 compressed image data, and the client The notifying means in the apparatus notifies the server apparatus of image quality designation when the selected processing function is displayed, and the server apparatus transmits the image quality designation to the client apparatus when notified of the image quality designation from the client apparatus. An information processing system comprising means for selecting a partial code corresponding to the notified image quality designation of compressed image data to be processed.

  The invention of claim 10 is a client device that transmits compressed image data to and from a server device, and includes a request for selecting a processing function to be executed and a designation of the processing function selected by the means. Means for generating, means for transmitting the request generated by the means to the server apparatus, means for receiving a response returned from the server apparatus in response to the request, and the server apparatus from the response received by the means And a means for recognizing the stream type selected by the client device.

  The invention of claim 11 is a client device for transmitting compressed image data to and from a server device, the means for selecting a processing function to be executed, the designation of the processing function selected by the means, and the compressed image data Means for generating a request including specification of a stream type at the time of transmission, means for transmitting the request generated by the means to the server apparatus, means for receiving a response returned from the server apparatus in response to the request, And a means for recognizing the stream type selected by the server apparatus from the response received by the means.

  A twelfth aspect of the invention is the client device according to the tenth or eleventh aspect of the invention, wherein the compressed image data transmitted to the server device is JPEG2000 compressed image data, and the stream type is JPP- A client device characterized by being a stream or JPT-stream.

  A thirteenth aspect of the present invention is the client apparatus according to the twelfth aspect of the present invention, wherein the request generated when the selected processing function is displayed includes image quality designation.

  According to a fourteenth aspect of the present invention, there is provided a server device for transmitting compressed image data to and from a client device, the means for receiving a request from the client device, and the client device side from the request received by the means. Means for recognizing the selected processing function, means for selecting a stream type at the time of transmission of compressed image data to and from the client device based on the processing function recognized by the means, and selected by the means A server apparatus comprising: means for generating a response including designation of a stream type; and means for transmitting the response generated by the means to the client apparatus.

  A fifteenth aspect of the present invention is the server apparatus according to the fourteenth aspect of the present invention, wherein the compressed image data transmitted to the client apparatus is JPEG2000 compressed image data, and the means for recognizing the processing function is used. When the recognized processing function is a display, the means for selecting the stream type is a server apparatus characterized by selecting JPP-stream as the stream type.

  A sixteenth aspect of the invention is the server device according to the fourteenth aspect of the invention, wherein the compressed image data transmitted to the client device is JPEG 2000 compressed image data, and the means for recognizing the processing function is used. When the recognized processing function is printing, saving or uploading, the means for selecting the stream type is a server apparatus characterized by selecting JPT-stream as the stream type.

  According to a seventeenth aspect of the present invention, there is provided a server device for transmitting compressed image data to and from a client device, the means for receiving a request from the client device, and the client device side from the request received by the means Based on the processing function selected in step (b), a means for recognizing a stream type at the time of transmission of compressed image data to / from the client apparatus specified on the client apparatus side, and a stream based on the processing function recognized by the recognition means・ Determines whether or not the type needs to be corrected. When it is determined that correction is not necessary, the stream type recognized by the recognizing unit is selected. When it is determined that correction is necessary, it is based on the processing function recognized by the recognizing unit Means for selecting another stream type and an indication of the stream type selected by the means; A server device comprising means for generated a response, to have a means for transmitting a response generated by said means to the client device including a.

  The invention according to claim 18 is the server apparatus according to the invention according to claim 17, wherein the compressed image data transmitted to and from the client apparatus is JPEG2000 compressed image data, and the means for selecting a stream type Is a server apparatus that determines that correction is required when the processing function and stream type recognized by the recognition means are display and JPT-stream, respectively, and selects JPP-stream as the stream type. is there.

  A nineteenth aspect of the invention is the server device according to the seventeenth aspect of the invention, wherein the compressed image data transmitted to and from the client device is JPEG 2000 compressed image data, and the means for selecting a stream type Is determined to be corrected when the processing function and the stream type recognized by the recognition unit are printing, saving or uploading, and JPP-stream, respectively, and JPT-stream is selected as the stream type. Server device.

  A twentieth aspect of the invention is the server device according to the fourteenth or seventeenth aspect of the invention, wherein the compressed image data transmitted to the client device is JPEG 2000 compressed image data and is transmitted to the client device. When the power compressed image data is a single layer, the server apparatus has means for converting the compressed image data into multi-layer compressed image data.

  A twenty-first aspect of the invention is the server device according to the fourteenth or seventeenth aspect of the invention, wherein the compressed image data transmitted to the client device is JPEG2000 compressed image data and is transmitted to the client device. When the power compressed image data is a multi-layer, the server device has means for converting the compressed image data into single-layer compressed image data.

  According to a twenty-second aspect of the present invention, in the server device according to the fourteenth or seventeenth aspect of the invention, the compressed image data transmitted to the client device is JPEG2000 compressed image data, and is received from the request by the recognition unit. The server apparatus further comprises means for selecting a partial code corresponding to the image quality designation of the compressed image data to be transmitted to the client apparatus when the image quality designation is recognized.

  The invention of claim 23 is an information processing system for transmitting JPEG2000 compressed image data between a client device and a server device, wherein the client device notifies the server device of a processing function selected by the client device, The server device selects and selects JPP-stream or JPT-stream as a stream type when transmitting compressed image data to and from the client device based on the processing function notified from the client device. The stream type control method is characterized by notifying the client device of a stream type.

  A twenty-fourth aspect of the invention is a program for causing a computer to function as each means of the client device according to the tenth, eleventh, twelfth or thirteenth aspect of the invention.

  The invention of claim 25 is a program that causes a computer to function as each means of the server device according to any one of claims 14 to 22.

  A twenty-sixth aspect of the invention is a computer-readable information recording medium on which a program according to the twenty-fourth or twenty-fifth aspect of the invention is recorded.

  According to the first to ninth and 23rd aspects of the present invention, the compressed image data is transmitted by the stream type suitable for the processing function executed on the client device side, so that the client device side can execute image display at high speed. In addition, printing, saving or uploading can be executed at high speed with a small amount of memory. According to the invention of claim 7, for example, the processing function selected on the client apparatus side is “display”, the target is single-layer compressed image data, and JPT-stream is selected as the stream type. If the target is not obtained, the target can be converted to multi-layer compressed image data on the server device side and transmitted with priority from the tile part of the upper layer, so that the entire image ( Or all other regions of interest) can be displayed at high speed. According to the invention of claim 8, for example, when the target is multi-layer compressed image data and the selected processing function is “print” or “save”, the server device side compresses the target into a single layer. Since it can be converted into image data and transmitted by JPT-team, data can be transmitted more efficiently and printing or saving can be executed at a higher speed than when transmitting as multi-layer. According to the ninth aspect of the present invention, only the target partial code necessary for image display with the image quality specified on the client device side can be transmitted to the client device side. Image display is possible, and the load on the network can be reduced by reducing the transmission code amount. According to the invention of claims 10 to 22, the information processing system according to the invention of claims 1 to 9 can be constructed. According to the twenty-fourth to twenty-sixth aspects of the present invention, the client device or the server device according to the tenth to twenty-second aspects of the present invention can be realized easily using a computer, and so on.

  FIG. 3 is a block diagram for explaining an embodiment of the present invention. In the information processing system shown in FIG. 2, the client device 11 and the server device 12 are connected via a network 13 (LAN, Internet, Intranet, etc.), and compressed image data is transmitted between the client device 11 and the server device 12. To do. Here, description will be made assuming that JPEG 2000 compressed image data is used as the compressed image data.

  The client device 11 includes, as functional components, a processing function selection unit 100 that selects a processing function to be executed (display, printing, storage, and upload), a request issuance unit 101 that generates a request for the server device 12, and an issued request. On the other hand, the response interpreting unit 102 interprets the response returned from the server device 12, the display processing unit 103 that executes processing for decompressing and displaying the compressed image data received from the server device 12, and the compressed image data received from the server device 12. A print processing unit 104 that executes processing to decompress and print, a storage processing unit 105 that executes processing to save compressed image data received from the server device 12, and an upload that executes processing to upload compressed image data to the server device 106 Network with the processing unit 106 and the server device 12 The communication unit 107 performs communication via the click 13, a configuration in which a like system controller 108 for controlling the internal operation of the client device 11. When a new processing function is added, a processing unit corresponding to the new processing function is provided.

  The server device 12 includes, as functional components, a communication unit 116 that performs communication with the client device 11 via the network 13, a request interpretation unit 111 that interprets a request received from the client device 11, and a processing function in the request. Based on the designation (and option designation), a stream type negotiation unit 112 that selects one stream type from among the stream types supported by the server apparatus itself, and download of compressed image data to the client apparatus 11 ( Here, a download processing unit 113 that executes processing for transmission of compressed image data to the client device side is collectively referred to as download), and storage processing that performs processing for uploading and storing compressed image data from the client device 11 Part 114, A configuration including a code conversion unit 115 that executes code conversion from single layer to multi layer or code conversion from multi layer to single layer for the reduced image data, a system control unit 117 that controls the internal operation of the server device 12, and the like It is.

  The client apparatus 11 usually includes a CPU 200, a memory 201, a hard disk device 203, an input device 204 (for example, a pointing device such as a keyboard and a mouse), a display 205, a printer 206, a network interface 207, and the like as shown in FIG. This is realized by a program on a computer having a configuration interconnected by a bus 208. That is, a program for causing a computer to function as the constituent elements 100 to 108 of the client apparatus 11 shown in FIG. 3 is loaded into the memory 201, and the program is executed by the CPU 200, so that the computer can execute the client apparatus 11 according to the present invention. Works as. Such a program is according to claim 24. A computer-readable information recording (storage) medium such as a magnetic disk, an optical disk, a magneto-optical disk, or a semiconductor storage element on which the program is recorded is according to claim 26.

  Similarly, the server device 12 is also typically realized by a program on a computer having a configuration in which a CPU 210, a memory 212, a hard disk device 213, a network interface 214, and the like are interconnected by a bus 215 as shown in FIG. That is, a program for causing a computer to function as the components 111 to 117 of the server device 12 shown in FIG. 3 is loaded into the memory 212 and the program is executed by the CPU 210, whereby the computer is connected to the server device 12 according to the present invention. Works as. Such a program is according to claim 25. A computer-readable information recording (storage) medium such as a magnetic disk, an optical disk, a magneto-optical disk, or a semiconductor storage element on which the program is recorded is according to claim 26.

  FIG. 5 is a simplified flowchart for explaining the operation of both apparatuses when the client apparatus 11 receives compressed image data from the server apparatus 12 and performs display, printing, or storage processing.

  The processing function selection unit 100 of the client apparatus 11 selects a processing function (in this case, any one of display, printing, and saving) to be executed (step 1). Specifically, for example, an operator on the client device side uses the input device 204 to perform an operation of selecting a menu on the screen of the display 205, thereby selecting one processing function.

  The request issuing unit 101 generates a request including specification of the selected processing function, and transmits it to the server device 12 via the network 13 by the communication unit 107 (step 2). As a result, the selected processing function is notified to the server device 12. Naturally, the designation of the compressed image data as the target is also included in the request. In the request, it is also possible to set a stream type and image quality (Quality) as option designation.

  The server device 12 receives the request at the communication unit 116 (step 11), and interprets the content of the request at the request interpretation unit 111 (step 12). Here, the processing function selected on the client device side is recognized.

  The stream type negotiation unit 112 refers to the processing function (and option designation) recognized in step 12, negotiates the stream type, and supports one stream type (JPP-stream or JPT-stream) is selected (step 13). Typically, JPP-stream is selected when “display” is designated as the processing function, and JPT-stream when “print”, “save” or “upload” is designated as the processing function. Select. Also, when the stream type is specified as an option specification in the request, when the stream type is not suitable for the specified processing function, for example, when the processing function is “display” and JPT-stream is specified If JPP-stream can be selected, the stream type is modified to JPP-stream.

  The download processing unit 113 generates a response header in which the selected stream type is specified, and transmits the response header to the client device side by the communication unit 116 (this notifies the client device side of the selected stream type). In response to the response header, the code of the target compressed image data according to the selected stream type is transmitted to the client device side by the communication unit 116 (step 14).

  On the client device side, the communication unit 107 receives a response from the server device (step 3), and the response interpretation unit 102 interprets the response and the header (step 4). Here, the stream type selected by the negotiation on the server device side is recognized (step 4).

  Then, in the processing unit (103, 104, 105 in this case) corresponding to the selected processing function, the subsequent response data is interpreted according to the response header interpretation result, and the process is executed (step 5). That is, when the selected processing function is display, the display processing unit 104 executes processing for decompressing the response data and displaying it on the display 205. If the selected processing function is printing, the print processing unit 105 decompresses the response data and executes the process output by the printer 206. In the case of the storage function, the storage processing unit 105 executes processing for storing response data as a file in the hard disk device 203.

  When “display” is designated as the processing function and the image quality is designated, the download processing unit 113 selects and transmits a partial code corresponding to the designated image quality of the target compressed image data (such as this). A means for selecting a partial code is included in the download processing unit 113). For example, in the case of multi-layer compressed image data, codes corresponding to the number of layers corresponding to the specified image quality are selected from the upper layer and transmitted. In this case, when the target is single-layer compressed image data, the code conversion unit 115 performs conversion into the required number of layers of multi-layer compressed image data. FIG. 6 shows an example in which code conversion is performed from a single layer to two layers, and the original tile part (left side) is divided into two tile parts (right side).

  Further, when the processing function is “display”, the target is single-layer compressed image data, and JPT-stream must be selected as the stream type, the download processing unit 113 compresses the data by the code conversion unit 115. The image data can be converted into a multi-layer, and can be transmitted preferentially from the tile part of the higher layer. In this way, the entire image can be displayed at a higher speed than in the case of a single layer.

  On the contrary, the code conversion unit 115 can convert the compressed image data from a multi-layer to a single layer. For example, when the target is multi-layer compressed image data and the selected processing function is “print” or “save”, the download processing unit 113 converts the target into single-layer compressed image data by the code conversion unit 115. Then, it can be transmitted by JPT-team. When converted to a single layer in this manner, data transmission is performed more efficiently than when conversion is not performed, and printing or storage processing can be executed at high speed.

  In the case of uploading, steps 1 to 4 on the client device side are the same as in the case of downloading. Next, the sign of the target compressed image data stored in the hard disk device 203 by the upload processing unit 106 is changed to the server device side. The communication unit 107 executes processing for transmission to the server device side according to the stream type notified from the server. On the server device side, the upload processing unit 114 stores the compressed image data received by the communication unit 116 as a file in the hard disk device 213.

  Heretofore, the description has been made assuming that the region of interest is not specified in the request. However, if there is such a specification, the server device operates to transmit the data of the specified region of interest.

  Next, an example of request / response / stream type negotiation will be described. In each of the following examples, << indicates a request from the client, >> indicates a response from the server, and n in << n >> indicates the number of requests or responses. Also, the description between-is a comment.

[Example 1]
By specifying the processing function = display in the first request in this example, JPP-stream is selected by negotiation, and response data according to this is sent.
<< 1 >>
<< GET / clena-30.jp2? & Cap = vc.client.capability.display HTTP / 1.1
--- Client ability = Display ---
(Some)
(Some)
>> Content-Type: image / jpp-stream
-The server recognizes that the processing function is "display" from "cap = vc.client.capability.display" in the request, sets the stream type (Image Return Type) to JPP-stream, and response data ----
(Omitted).

[Example 2]
In this example, by setting the client processing function = printing in the first request, response data is sent in JPT-stream.
<< 1 >>
<< GET / clena-30.jp2? Cap = vc.client.capability.print HTTP / 1.1
--- Client processing function = print ----
(Some)
(Some)
>> Content-Type: image / jpt-stream
--- Based on “cap = vc.client.capability.print” in the client, the server sets the stream type (Image Return Type) to JPT-stream and sends the response data.

[Example 3]
In this example, by setting Quality = 50 in the second request, response data with an image quality of 50% is sent by JPT-stream. At this time, inter-code conversion to a multi-layer may be performed as necessary in the server device as described above.
<< 1 >>
<< GET / clena-30.jp2? Type = jpp-stream (partially omitted) HTTP / 1.1
>> Content-Type: image / jpp-stream
<< 2 >>
<< GET / jpip? Quality = 50 & type = jpt-stream (partially omitted) HTTP / 1.1
>> Content-Type: image / jpt-stream
--- Set Image Return Type to JPT-stream --- The server sets Image Return Type to JPT-stream based on “quality = 50” in the request and sends response data—

[Example 4]
In this example, cap = vc.client.printer & type = jpp-stream (processing function = printing, stream type = JPP-stream) is specified in the second request. Assuming that something is higher, the stream type is modified to JPT-stream.
<< 1 >>
<< GET / clena-30.jp2? Type = jpp-stream & cnew = http (partially omitted) HTTP / 1.1
>> JPIP-cnew: cid = JPH_032487CB3D581F59, path = jpip, transport = http
>> Content-Type: image / jpp-stream
--- The server sends response data in JPP-stream (omitted) ---
<< 2 >>
<< GET / jpip? Cap = vc.client.printer & type = jpp-stream (partially omitted) HTTP / 1.1
(Omitted)
>> Content-Type: image / jpt-stream
(Omitted)
--- The server sends response data using JPT-stream ---.

  In addition, although embodiment which handles JPEG2000 compression image data was demonstrated, it is clear that this invention is not limited only to it.

It is a figure which contrasts and shows the difference in the transmission and display of the image by a stream type. It is a graph which compares and shows the change of PSNR of the data transfer amount and the whole expansion | extension image in the case of JPT-stream transmission and the case of JPP-stream transmission. It is a block diagram for demonstrating the functional structure of the information processing system which concerns on this invention, a client apparatus, and a server apparatus. It is a block diagram for demonstrating the form which implement | achieves a client apparatus and a server apparatus using a computer. 6 is a simplified flowchart for explaining operations of the client device and the server device when display, printing, or saving is selected as a processing function on the client device side. It is a figure for demonstrating the example of the code conversion from a single layer to a multilayer.

Explanation of symbols

DESCRIPTION OF SYMBOLS 11 Client apparatus 12 Server apparatus 13 Network 100 Processing function selection part 101 Request issue part 102 Response interpretation part 103 Display processing part 104 Print processing part 105 Storage processing part 106 Upload processing part 107 Communication part 111 Request interpretation part 112 Stream type negotiation part 113 download processing unit 114 upload processing unit 115 code conversion unit 116 communication unit

Claims (26)

An information processing system for transmitting compressed image data between a client device and a server device,
The client device has means for selecting a processing function to be executed, and means for notifying the server device of the processing function selected by the means,
The server device selects a stream type at the time of transmission of compressed image data to and from the client device based on a processing function notified from the client device, and selects the stream type selected by the means. An information processing system comprising means for notifying the client device. The compressed image data transmitted between the client device and the server device is JPEG2000 compressed image data,
2. The information processing according to claim 1, wherein the means for selecting a stream type in the server device selects JPP-stream as the stream type when the processing function notified from the client device is displayed. system. The compressed image data transmitted between the client device and the server device is JPEG2000 compressed image data,
2. The means for selecting a stream type in the server apparatus selects JPT-stream as a stream type when the processing function notified from the client apparatus is printing, saving or uploading. The information processing system described. An information processing system for transmitting compressed image data between a client device and a server device,
Means for selecting a processing function to be executed, and means for notifying the server apparatus of a processing function selected by the means and a stream type at the time of transmission of compressed image data between the server apparatus And
The server device determines whether or not the stream type notified from the client device needs to be corrected based on the processing function notified from the client device, and determines that the notified stream type is necessary when correction is unnecessary. A means for selecting another stream type based on the notified processing function and a means for notifying the client device of the stream type selected by the means when it is determined that correction is necessary. An information processing system characterized by The compressed image data transmitted between the client device and the server device is JPEG2000 compressed image data,
The means for selecting a stream type in the server device is notified of display as a processing function from the client device, and when JPT-stream is notified as a stream type, determines that the stream type needs to be corrected, 5. The information processing system according to claim 4, wherein JPP-stream is selected as the stream type. The compressed image data transmitted between the client device and the server device is JPEG2000 compressed image data,
The means for selecting a stream type in the server device is notified of printing, saving or uploading as a processing function from the client device, and when the JPP-stream is notified as a stream type, the stream type needs to be corrected. The information processing system according to claim 4, wherein JPT-stream is selected as the stream type. The compressed image data transmitted between the client device and the server device is JPEG2000 compressed image data,
5. The server device according to claim 1, further comprising means for converting the compressed image data into multi-layered compressed image data when the compressed image data to be transmitted to the client device is a single layer. The information processing system described. The compressed image data transmitted between the client device and the server device is JPEG2000 compressed image data,
5. The server device according to claim 1, further comprising means for converting the compressed image data into single layer compressed image data when the compressed image data to be transmitted to the client device is a multi-layer. The information processing system described. The compressed image data transmitted between the client device and the server device is JPEG2000 compressed image data,
The notifying means in the client device notifies the server device of image quality designation when the selected processing function is displayed,
The server device includes means for selecting a partial code corresponding to the notified image quality designation of compressed image data to be transmitted to the client device when the image quality designation is notified from the client device. The information processing system according to claim 1 or 4. A client device that transmits compressed image data to and from a server device,
Means for selecting a processing function to be executed, means for generating a request including designation of the processing function selected by the means, means for transmitting the request generated by the means to the server device, and for the request A client apparatus comprising: means for receiving a response returned from the server apparatus; and means for recognizing a stream type selected by the server apparatus from the response received by the means. A client device that transmits compressed image data to and from a server device,
Means for selecting a processing function to be executed, means for generating a request including specification of a processing function selected by the means and specification of a stream type at the time of transmission of compressed image data, and a request generated by the means Means for transmitting to the server device; means for receiving a response returned from the server device in response to the request; and means for recognizing the stream type selected by the server device from the response received by the means. A client device characterized by comprising: The compressed image data transmitted between the server devices is JPEG2000 compressed image data,
12. The client apparatus according to claim 10, wherein the stream type is JPP-stream or JPT-stream.   13. The client apparatus according to claim 12, wherein the request generated when the selected processing function is displayed includes image quality designation. A server device that transmits compressed image data to and from a client device,
Means for receiving a request from the client device; means for recognizing a processing function selected on the client device side from the request received by the means; and the client device based on the processing function recognized by the means Means for selecting a stream type at the time of transmission of compressed image data to, a means for generating a response including designation of the stream type selected by the means, and a response generated by the means for sending the response to the client A server device comprising means for transmitting to the device. The compressed image data transmitted between the client devices is JPEG2000 compressed image data,
15. The server apparatus according to claim 14, wherein when the processing function recognized by the means for recognizing a processing function is a display, the means for selecting a stream type selects JPP-stream as the stream type. . The compressed image data transmitted between the client devices is JPEG2000 compressed image data,
15. The means for selecting a stream type selects JPT-stream as a stream type when the processing function recognized by the means for recognizing a processing function is printing, saving or uploading. The server apparatus of description. A server device that transmits compressed image data to and from a client device,
Compressed image between means for receiving a request from the client apparatus, a processing function selected on the client apparatus side from the request received by the means, and the client apparatus specified on the client apparatus side Based on the means for recognizing the stream type at the time of data transmission and the processing function recognized by the recognizing means, it is judged whether or not the stream type needs to be corrected. Selecting a stream type, and when it is determined that correction is necessary, means for selecting another stream type based on the processing function recognized by the recognition means, and designation of the stream type selected by the means Means for generating a response and the response generated by the means Server apparatus characterized by a means for transmitting to the device. The compressed image data transmitted between the client devices is JPEG2000 compressed image data,
The means for selecting a stream type determines that correction is necessary when the processing function and the stream type recognized by the recognition means are display and JPT-stream, respectively, and selects JPP-stream as the stream type. The server device according to claim 17. The compressed image data transmitted to and from the client device is JPEG 2000 compressed image data,
The means for selecting a stream type determines that correction is necessary when the processing function and the stream type recognized by the recognition means are print, save or upload, and JPP-stream, respectively. The server apparatus according to claim 17, wherein a stream is selected. The compressed image data transmitted between the client devices is JPEG2000 compressed image data,
18. The server device according to claim 14, further comprising means for converting the compressed image data into multi-layered compressed image data when the compressed image data to be transmitted to the client device is a single layer. The compressed image data transmitted to and from the client device is JPEG 2000 compressed image data,
18. The server device according to claim 14, further comprising means for converting the compressed image data into single layer compressed image data when the compressed image data to be transmitted to the client device is a multi-layer. The compressed image data transmitted between the client devices is JPEG2000 compressed image data,
18. A means for selecting a partial code corresponding to the image quality designation of the compressed image data to be transmitted to the client device when the recognition means recognizes the image quality designation from the request. The server apparatus of description. In an information processing system for transmitting JPEG2000 compressed image data between a client device and a server device,
The client device notifies the server device of the processing function selected by the client device;
The server device selects and selects JPP-stream or JPT-stream as a stream type when transmitting compressed image data to and from the client device based on the processing function notified from the client device. A stream type control method comprising: notifying the client device of a stream type.   14. A program for causing a computer to function as each means of a client device according to claim 10, 11, 12, or 13.   23. A program that causes a computer to function as each unit of the server device according to claim 14.   A computer-readable information recording medium on which the program according to claim 24 or 25 is recorded.

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