JP5513068B2 - Information processing apparatus and control method thereof - Google Patents

Description

  The present invention relates to an information processing apparatus and a control method thereof.

  As a standard for transmitting and receiving data between an image processing apparatus such as an imaging apparatus and an information processing apparatus such as a personal computer (PC), PTP (Picture Transfer Protocol) is known. According to PTP, before acquiring image data from an image processing apparatus, the information processing apparatus uses the GetObjectHandles command and the GetObjectInfo command to acquire information on all objects held by the image processing apparatus.

  In addition, in order to improve the efficiency of data transmission / reception, when data transmission fails in the middle, the process of resuming transmission from the untransmitted part (resume process) instead of retransmitting the entire data Is known (Patent Document 1). According to Patent Literature 1, when a communication device goes out of service area while content data is being distributed to a communication terminal, after the communication device returns to the service area, the distribution device is not the entire content data but an undistributed portion. Only deliver.

JP 2002-135350 A

  In an object-based protocol that implements communication using an object concept such as PTP, the problem is how to resume processing. If the resume processing of Patent Document 1 is applied to PTP, the image processing apparatus may have image data (incomplete objects) being received. This may cause the following problems. There is sex.

  As described above, the information processing apparatus acquires information regarding all objects held by the image processing apparatus, but these “all objects” may include incomplete objects. However, the information processing apparatus cannot determine whether each object is an incomplete object. For this reason, the information processing apparatus may perform a useless operation of acquiring an incomplete object (for example, a fragment of image data) from the image processing apparatus. In addition, if the information processing apparatus misunderstands that an incomplete object is actually a complete object, the operation of the information processing apparatus may be hindered.

  The present invention has been made in view of such a situation, and an object thereof is to provide a technique for resume processing using an object-based protocol.

In order to solve the above-described problem, the first aspect of the present invention is an information processing apparatus including a communication unit that communicates with an image processing apparatus, and communication using the communication unit with the image processing apparatus is enabled. Detecting means for detecting this, transmission means for transmitting image data stored in a storage medium of the information processing apparatus to the image processing apparatus as a data object using the communication means, and the detecting means for performing the image processing When it is detected that communication with the apparatus using the communication means is possible, the image processing apparatus has a data object that is partly transmitted by the transmission means and the remaining part is untransmitted. resume information for specifying the data portion of the transmission, and receiving means for receiving from said image processing apparatus using said communication means, received by the receiving means les And a control means for executing a resume processing of transmitting the data specified on the basis of the volume information to the transmitting means, said detecting means detects that it is now possible to communicate with said communication means and said image processing apparatus If the object information about the data object with said image processing apparatus comprises obtaining means for obtaining from the image processing apparatus using said communication means, said communication means with the pre-Symbol detection means the image processing apparatus After detecting that the used communication is possible and before acquiring the object information by the acquiring unit , the receiving unit receives the resume information, and the control unit executes the resume process. An information processing apparatus characterized by the above is provided.

  Other features of the present invention will become more apparent from the accompanying drawings and the following description of the preferred embodiments.

  With the above configuration, according to the present invention, a technique for resume processing using an object-based protocol is provided.

1 is a block diagram showing a configuration (function) of an imaging apparatus 100 that is an example of an image processing apparatus according to a first embodiment. 1 is a block diagram showing a configuration of a PC 200 (personal computer) that is an example of an information processing apparatus according to a first embodiment. FIG. 2 is a conceptual diagram showing a data structure in a storage medium 106 of the imaging apparatus 100. 3 is a conceptual diagram showing a data structure in a secondary storage device 205 of the PC 200. FIG. The flowchart which shows the flow of the communication process which PC200 performs. 3 is a flowchart showing a flow of communication processing executed by the imaging apparatus 100.

Embodiments of the present invention will be described below with reference to the accompanying drawings. The technical scope of the present invention is determined by the claims, and is not limited by the following individual embodiments. In addition, not all combinations of features described in the embodiments are essential to the present invention.
[First embodiment]
FIG. 1 is a block diagram illustrating a configuration (function) of an imaging apparatus 100 that is an example of an image processing apparatus according to the first embodiment. The imaging apparatus 100 is, for example, a digital still camera or a digital video camera, and is an apparatus that captures a subject and acquires image data.

  The optical system 101 includes a lens, a shutter, and a diaphragm. The optical system 101 forms an image of light from the subject on the image sensor 102 with an appropriate amount and timing. The image sensor 102 converts light imaged through the optical system 101 into image data.

  The CPU 103 executes various programs and controls each component included in the imaging device 100 by executing a program (firmware) stored in the secondary storage device 105. The CPU 103 also performs image processing such as brightness correction on the image data acquired from the image sensor 102.

  The primary storage device 104 is a volatile memory that stores temporary data, and is used as a work area of the CPU 103. The secondary storage device 105 is a non-volatile memory, and stores a program (firmware) executed by the CPU 103 and various setting information. The storage medium 106 is, for example, an SD (registered trademark) memory card, and stores image data, resume information (described later), and the like.

  The display unit 107 is, for example, a liquid crystal display, and is used as an electronic viewfinder (EVF). The display unit 107 also displays image data in the storage medium 106, an operation screen for interactive operation, and the like. The operation unit 108 is for accepting a user operation. The operation unit 108 includes, for example, a button, a lever, a touch panel, and the like.

  The communication device 109 communicates (transmits / receives) control commands and data with an external device in accordance with PTP (Picture Transfer Protocol). The communication device 109 may be wired to an external device using, for example, a USB (Universal Serial Bus) cable, or may be wirelessly connected according to the IEEE 802.11a / b / g standard or the like.

  FIG. 2 is a block diagram illustrating a configuration of a PC 200 (personal computer) that is an example of the information processing apparatus according to the first embodiment.

  The display unit 201 is, for example, a liquid crystal display, and displays image data in the secondary storage device 205, an operation screen for interactive operation, and the like. The operation unit 202 is for accepting a user operation. The operation unit 202 includes, for example, a keyboard and a mouse.

  The CPU 203 executes various programs and controls each component included in the PC 200 by executing a program stored in the secondary storage device 205. The primary storage device 204 is a volatile memory that stores temporary data, and is used as a work area of the CPU 203. The secondary storage device 205 is a nonvolatile memory, and stores programs executed by the CPU 203 and various setting information.

  The communication device 206 communicates (transmits / receives) control commands and data with an external device according to PTP (Picture Transfer Protocol). The communication device 206 may be wired to an external device using, for example, a USB (Universal Serial Bus) cable, or may be wirelessly connected in accordance with the IEEE 802.11a / b / g standard or the like. In this embodiment, PTP is used as a communication protocol. However, an object-based protocol such as MTP (Multimedia Transfer Protocol) may be used.

  FIG. 3 is a conceptual diagram illustrating a data structure in the storage medium 106 of the imaging apparatus 100. Reference numeral 301 denotes a root directory conforming to the DCF standard (Design rule for Camera File system). 302 is a subdirectory conforming to the DCF standard. Reference numeral 303 denotes a file structure inside the subdirectory 302. In FIG. JPG to IMG_1000. Assume that a total of 1000 JPG files exist. These files are handled as data objects in PTP. The data object includes a header part 306, an image data part 307, and a footer part 308. The data object is, for example, JPEG image data, but is not limited to this.

  The image data part 307 includes a received data part 309. For example, when reception of a data object from the PC 200 is interrupted, the received data section 309 stores image data fragments received before the interruption. The image data part 307 also conceptually includes a missing data part 310. The insufficient data portion 310 represents an unreceived portion of the image data, but it is not always necessary to allocate a memory area corresponding to the amount of unreceived data in the storage medium 106. When the reception of the data object is completed, the received data portion 309 includes complete image data, and the lacking data portion 310 does not exist.

  The footer unit 308 includes resume information 305. The resume information 305 includes a Resume flag 311 indicating whether or not the data object is interrupted, a Unique ID 312 (identification information) that uniquely identifies the data object, and a transferred data indicating the data size transferred before the interruption. Size 313. Note that the resume information 305 is not necessarily included in the data object as long as it is associated with the target data object.

  When the imaging apparatus 100 is connected to the PC 200, the CPU 103 assigns a unique handle (ObjectHandle) to each directory and file in the storage medium 106 in accordance with the PTP standard. Thus, each directory and file can be handled as a PTP object.

  FIG. 4 is a conceptual diagram showing a data structure in the secondary storage device 205 of the PC 200. Reference numeral 314 denotes a directory in which data objects transferred from the PC 200 to the imaging apparatus 100 are stored. 315 indicates a file structure in the directory 314, and MyPicture0001. JPG to MyPicture 1000. There are a total of 1000 JPG files. These files are handled as data objects.

  As in the case of the imaging apparatus 100, the data object includes a header part 316, an image data part 317, and a footer part 318. However, unlike the case of the imaging apparatus 100, the footer unit 318 includes only the Unique ID 319 as resume information. Similarly to the resume information 305 (see FIG. 3), the unique ID 319 does not necessarily need to be included in the data object as long as it is associated with the target data object.

  If the data object 320 and the data object 304 (see FIG. 3) are the same, the Unique ID 319 and the Unique ID 312 (see FIG. 3) match.

  FIG. 5 is a flowchart showing the flow of communication processing executed by the PC 200. The processing of each step in this flowchart is realized by the CPU 203 reading and executing a program stored in the secondary storage device 205.

  In step S <b> 501, the CPU 203 establishes a connection with the imaging device 100 via the communication device 206. When the connection is established, the CPU 203 detects that communication with the imaging device 100 using the communication device 206 is possible.

  In step S <b> 502, the CPU 203 transmits a resume information request command to the imaging apparatus 100 via the communication apparatus 206. This request command is, for example, a GetResumeInfo command newly defined for resume processing.

  What is important in the present embodiment is that after it is detected that communication using the communication device 206 with the imaging device 100 is possible, resume processing is performed before object information is received from the imaging device 100 in S509 described later. It is to execute processing. Therefore, it is not always necessary to send a resume information request command immediately after connection with the imaging apparatus 100 (S501).

  In step S503, the CPU 203 determines whether resume information has been received. When there is a data object to be resumed on the imaging apparatus 100 side, that is, when a data object having the resume information 305 exists, the resume information 305 is returned in response to this request command. If the PC 200 receives the resume information, the process proceeds to S504, and if not, the process proceeds to S508.

  In step S504, the CPU 203 searches for the data object to be resumed from the data objects stored in the secondary storage device 205 based on the resume information received in step S503. Specifically, the CPU 203 searches for a data object having a UniqueID 319 that matches the UniqueID 312 of the resume information received in S503.

  In step S505, the CPU 203 inquires of the user whether or not to cancel the resume process. If a cancel instruction is input via the operation unit 202, the process proceeds to S506, and if not, the process proceeds to S507. Note that the cancel instruction may be given from the imaging apparatus 100 to the PC 200. In this case, the process of S506 is unnecessary.

  In step S <b> 506, the CPU 203 transmits an instruction to cancel the resume process to the imaging device 100 via the communication device 206. Although details will be described later, when the resume process is canceled, the imaging apparatus 100 deletes the object being transmitted. Therefore, the instruction here is interpreted as an instruction to delete the object being transmitted by the imaging apparatus 100.

  In step S <b> 507, the CPU 203 identifies an untransmitted portion of the data object to be resumed based on the transferred size 313. Then, the CPU 203 transmits an untransmitted part to the imaging device 100 via the communication device 206. The details of the transmission processing for the untransmitted portion are the same as the processing in S512 to S515 described later. Although not shown here, even if a communication error occurs during transmission, further resume processing can be executed after communication recovery It is.

  In step S <b> 508, the CPU 203 requests and receives object information of all objects held by the imaging device 100 via the communication device 206. Here, for example, a GetObjectHandles command and a GetObjectInfo command are used. Request command and receive object information. Since the object being transmitted is deleted in S506, or the resume process is completed in S507, the object corresponding to the object information received in S508 does not include an incomplete object being transmitted. The “incomplete object in the middle of transmission” is an object of the imaging apparatus 100 that has a part (received data part 309) transmitted by the PC 200 and the remaining part (insufficient data part 310) has not been transmitted yet.

  In step S509, the CPU 203 displays the object information acquired in step S508 on the display unit 201.

  In step S <b> 510, the CPU 203 prompts the user to select an object stored in the secondary storage device 205 via the display unit 201. The object selected via the operation unit 202 becomes a transmission target object. Then, the CPU 203 creates object information of the data object to be transmitted.

  In step S <b> 511, the CPU 203 transmits the object information created in step S <b> 510 to the imaging device 100 via the communication device 206. The CPU 203 also generates a UniqueID and records it in the object to be transferred, and transmits the generated UniqueID to the imaging apparatus 100 as part of the object information. For example, a SendObjectInfo command is used for transmitting the object information.

  In step S512, the CPU 203 reads the transfer target object from the secondary storage device 205 and divides the object into a plurality of parts. In step S513, the CPU 203 sequentially transmits the parts divided in step S512 to the imaging device 100 via the communication device 206. For example, a SendPartialObject command is used to send the part.

  In step S514, the CPU 203 determines whether a communication error has occurred. If no communication error has occurred, the process proceeds to S515, and if a communication error has occurred, the process ends. Here, the communication error indicates a state in which communication between the imaging apparatus 100 and the PC 200 is impossible, such as disconnection of a communication cable, power-off of the imaging apparatus 100, shutdown of the PC 200, and the like. When a communication error occurs and the process ends, the PC 200 can perform the resume process in S507 after reconnecting to the imaging apparatus 100 in S501.

  In step S515, the CPU 203 determines whether transmission of all divided data (all parts) has been completed. If not completed, the process returns to S513, and the CPU 203 transmits the remaining parts. If completed, the process ends (in this case, the CPU 203 may delete the UniqueID recorded in S511. Alternatively, the process may return to S710 to transmit another object).

  FIG. 6 is a flowchart showing a flow of communication processing executed by the imaging apparatus 100. The processing of each step in this flowchart is realized by the CPU 103 reading and executing a program stored in the secondary storage device 105.

  In step S <b> 601, the CPU 103 establishes a connection with the PC 200 via the communication device 109. When the connection is established, the CPU 103 detects that communication with the PC 200 using the communication device 109 is possible. In addition, the CPU 103 assigns an ObjectHandle to each object in the storage medium 106.

  In step S <b> 602, the CPU 103 receives a resume information acquisition command from the PC 200 via the communication device 109. The resume information acquisition command is transmitted from the imaging apparatus 100 in S502. In step S604, the CPU 103 searches for a resume target object (that is, an object having the resume information 305 in which the resume flag 311 is set to “ON”). If there is a resume target object, the process proceeds to S606; otherwise, the process proceeds to S605.

  In step S <b> 605, the CPU 103 notifies the PC 200 that the resume information does not exist in the imaging device 100 via the communication device 109. As a notification method, the response parameter of the command received in S602 may be used, or the PC 200 may be notified as an event of the imaging apparatus 100.

  In step S <b> 606, the CPU 103 transmits resume information to the PC 200 via the communication device 109. In step S607, the CPU 103 determines whether a cancel request has occurred. The cancellation request may be received from the PC 200 as described with reference to S505 in FIG. 5 or may be input via the operation unit 108 of the imaging device 100. If a cancel request has occurred, the process proceeds to S609, and if not, the process proceeds to S609.

  In step S <b> 608, the CPU 103 deletes the resume target object from the storage medium 106 together with the resume information 305. In step S <b> 609, the CPU 103 receives the insufficient data unit 310 (untransmitted portion) via the communication device 109. The details of the reception processing of the untransmitted part are the same as the processing of S613 to S616, which will be described later, and although not shown here, even if a communication error occurs during transmission, further resume processing can be executed after communication recovery It is. After completion of the resume process, the CPU 103 may delete the resume information 305.

  In step S <b> 610, the CPU 103 receives an object information acquisition request for all objects held by the imaging apparatus 100 from the PC 200 via the communication apparatus 109.

  In step S <b> 611, the CPU 103 transmits object information to the PC 200 via the communication device 109. Since the object to be resumed is deleted in S608 or the resume process is completed in S609, the object corresponding to the object information transmitted in S611 does not include an incomplete object being received.

  In step S <b> 612, the CPU 103 receives object information of an object to be transmitted from the PC 200 to the imaging device 100 via the communication device 109 from the PC 200. The object information includes a Unique ID 319, and the CPU 103 temporarily stores the Unique ID 319 as the Unique ID 312 in the primary storage device 104. In step S <b> 613, the CPU 103 divides and receives objects from the PC 200 via the communication device 109 and sequentially stores them in the storage medium 106.

  In step S614, the CPU 103 determines whether a communication error has occurred. If a communication error has occurred, the process proceeds to S616, and if not, the process proceeds to S615. In step S615, the CPU 103 determines whether reception of all parts of the object is completed. If not completed, the process returns to S613, and the CPU 103 receives and stores the remaining parts. If completed, the process ends (return to S612 and the next object may be received).

  In step S <b> 616, the CPU 103 stores the resume information in the storage medium 106. Specifically, the CPU 103 generates a transferred Size 313 indicating the data size of the received data unit 309 received from the PC 200 and a Resume flag 311 set to “ON” until a communication error occurs in S614. Then, it is saved as the resume information 305 together with the UniqueID 312 temporarily stored in S612.

  As described above, according to the present embodiment, before receiving the object information from the imaging apparatus 100, the PC 200 transmits a resume information request command and executes the resume process. This prevents an object corresponding to the received object information from including an incomplete object (resume processing is not completed).

[Other Embodiments]
The components and processes described in each of the above embodiments may be implemented by hardware, software, or a combination thereof. Software (program) that implements some or all of these components and processes, and a storage medium storing the software are also included in the scope of the present invention.

Claims (9)

An information processing apparatus comprising communication means for communicating with an image processing apparatus,
Detection means for detecting that communication using the communication means with the image processing apparatus is possible;
Transmitting means for transmitting image data stored in a storage medium of the information processing apparatus to the image processing apparatus as a data object using the communication means;
When the detection means detects that communication with the image processing apparatus using the communication means is possible, a part of the image processing apparatus is transmitted by the transmission means and the remaining part is not transmitted. Receiving means for receiving resume information for identifying data of the untransmitted part of a data object from the image processing apparatus using the communication means;
Control means for executing a resume process for causing the transmitting means to transmit data specified based on the resume information received by the receiving means ;
When the detection unit detects that communication with the image processing apparatus using the communication unit is possible, object information regarding a data object that the image processing apparatus has is used to perform the image processing using the communication unit. Obtaining means for obtaining from the device;
With
After the pre-Symbol detection means detects that it is now possible to communicate with said communication means and said image processing apparatus, prior to acquisition of the object information by the acquisition means, said receiving means the resume information The information processing apparatus is characterized in that the control means executes the resume process. The transmission means stores identification information for specifying a data object to be transmitted and transmits the identification information to the image processing apparatus,
The resume information includes the identification information,
The information processing apparatus according to claim 1 , wherein the resume process includes a process of searching for a data object specified by identification information included in the resume information. Receiving means for receiving an instruction to cancel the resume process;
When the receiving unit receives the cancel instruction, the control unit transmits, to the image processing apparatus, an instruction to delete the data object whose remaining portion has not been transmitted, instead of executing the resume process. the information processing apparatus according to claim 1 or 2, characterized.   The information processing apparatus according to claim 1, wherein the resume information is included in a footer area of a data object of image data included in the image processing apparatus.   The information processing apparatus according to claim 1, wherein the resume information includes information related to a size of transmitted data.   6. The image data of the image processing apparatus is assigned an object handle in response to establishment of communication between the image processing apparatus and the information processing apparatus. The information processing apparatus described in 1. Said communication means, PTP (Picture Transfer Protocol) The information processing apparatus according to any one of claims 1 to 6, wherein the communicating with the image processing device in accordance with. A method for controlling an information processing apparatus including a communication unit that communicates with an image processing apparatus,
A detection step of detecting that the communication using the communication means with the pre-Symbol image processing apparatus has become possible,
The image data stored in the storage medium before the SL information processing apparatus, a transmission step of transmitting to the image processing apparatus using said communication unit as a data object,
If said detecting step in communication with said communication means and said image processing apparatus has become possible is detected, the image processing apparatus has, it is the is sent first portion Te transmitting step smell remaining portion A receiving step of receiving resume information for specifying data of the untransmitted portion of the untransmitted data object from the image processing apparatus using the communication means;
A control step of executing a resume process for causing the transmission step to transmit data specified based on the resume information received in the reception step ;
When it is detected in the detection step that communication using the communication unit with the image processing apparatus is possible, object information relating to a data object possessed by the image processing apparatus is obtained using the communication unit. An acquisition step of acquiring from the processing device;
With
Before Symbol detection step after smell Te communication using the communication means of the preceding Symbol image processing apparatus that is ready for sensed, before the acquisition of the previous SL object information that put in the obtaining step, the received A control method comprising: receiving the resume information in a step; and executing the resume process in the control step .   A computer-readable program for causing a computer to function as each unit of the information processing apparatus according to any one of claims 1 to 7.

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