JP2007220025A - Image processor, image display method, and computer program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To enhance security in a storage document which is authenticated in security. <P>SOLUTION: It is judged whether or not a thumbnail is displayed when the display processing of a whole image to be displayed as an image list is not completed yet (S1-S3). After the judgement processing, the propriety of the thumbnail of the image is judged (S4). When thumbnail displaying is possible, an image management part transfers the image data (S5). When the image data are transferred, the image display processing is performed and the image is displayed in the display part as the thumbnail (S6). When the thumbnail displaying is not possible in S4, a control part allows a display management part to display a prepared and held image and the file name of the image to be originally displayed (S7). <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an image processing apparatus that performs thumbnail display in consideration of security, an image display method, and a computer program executed by the image processing apparatus.

  As this type of technology, for example, the inventions disclosed in Patent Documents 1 to 3 are known. Among them, Patent Document 1 discloses a secret in which a printing apparatus receives print data described in PDL (page description language) from a host computer, analyzes the received data, creates a bitmap, and executes print processing. In the document printing system, from the host computer to the printing apparatus, the print data is a confidential print mode and designation means for designating an identifier and a password for the print data, and the print data is stored in the printing apparatus Storage means for storing in a storage device, and when the confidential printing mode is designated by the designation means, the printing device accumulates print data in the storage means and does not perform printing processing, and stores the print data. When printing, the data stored in the storage means is selected from the operation unit of the printing apparatus using an identifier, and the password is selected. Determining means for determining whether the person who executed the printing process is around the printing apparatus at the time of printing, and whether the person executing the printing process on the printing apparatus side is the person who sent the data. And a confidential printing system that performs trial printing of the data stored in the storage in a form that leaves only the layout information of the document contents. This system is intended to improve convenience when printing a document that requires confidentiality and to facilitate confidentiality.

  Patent Document 2 prohibits the display of the confidential part specified by the confidential part specifying unit for specifying the confidential part prohibited from browsing from the electronic document, and the display of the confidential part specified by the confidential part specifying unit. There is disclosed a document processing apparatus having display control means for displaying an electronic document by changing the layout of the electronic document in accordance with characteristics on the layout of the electronic document with respect to the confidential part. This document processing apparatus is intended to limit browsing of confidential parts without damaging the appearance of an electronic document.

Further, Patent Document 3 discloses a document image generating means for generating a document image indicating a document file, and an access right image for generating an access right image indicating the content of the access right set in the confidential part included in the document file. An image that outputs the document image and the access right image by associating the generation unit, the confidential part of the document image generated by the document image generation unit, and the access right image generated by the access right image generation unit An apparatus for processing a document file in which an access right having an output unit is set is disclosed. This document file processing apparatus informs that the access right is set for the document file, thereby causing the viewer to strongly recognize the confidential level of the document and the portion to be kept confidential. This is intended to prevent leakage of confidential information.
Japanese Patent Laid-Open No. 2002-132482 JP 2004-259195 A JP 2004-287789 A

  In recent years, thumbnail display is often used, and since the contents of a plurality of images can be easily confirmed, it is supported by many applications and OSs. Some display thumbnails on the screen of an operation unit such as a copying machine. However, if thumbnail display is performed easily, the image content leaks to a third party, which is not preferable in terms of security. Patent Documents 1 to 3 disclose a technique for maintaining confidentiality, in which the confidentiality of thumbnails used when confirming the contents of a plurality of image data is mentioned, but displayed. What should be done so that it doesn't look bad when you don't or don't display it, and it also lets you recognize the difference in confidentiality level depending on the document. It was not taken into consideration.

  The present invention has been made in view of such a background, and a problem to be solved is to further improve the security of a security-authenticated stored document.

  In order to solve the above-described problem, the first means is an image processing apparatus that displays thumbnails considering the security of an accumulated document. In the image processing apparatus, thumbnail display for determining whether to display thumbnails based on security attributes of image data is performed. It is characterized by comprising display / non-display control means and thumbnail display cancellation control means for switching from thumbnail display to thumbnail non-display when a security-authenticated thumbnail is displayed.

  The second means is characterized in that, in the first means, when a preset time has elapsed, the thumbnail display cancellation control means hides the thumbnail.

  A third means is characterized in that, in the first means, the security attribute is password setting information, and the security authentication is a password input.

  The fourth means is characterized in that, in the third means, after the password is input and the thumbnail is displayed, the thumbnail display cancellation control means hides the thumbnail by a screen initialization event by the user. .

  According to a fifth means, in the third means, a preset time or a password is input, and after a thumbnail is displayed, a screen initialization event operation by the user is performed, whichever comes first The thumbnail display canceling control means makes the thumbnail non-display by the event detected in the above.

  A sixth means is a first stage in which, in the fourth or fifth means, when the thumbnail display cancellation control means hides the thumbnail at a preset time, the first stage of transitioning to the thumbnail display state by selecting the relevant image, It is characterized in that it has two stages of a second stage in which a transition to the thumbnail display state is made by inputting a password in image selection.

  A seventh means is characterized in that, in the sixth means, the thumbnail display state transitions in order from the first stage to the second stage as time elapses.

  The eighth means corresponds to the display means for displaying the thumbnail of the image corresponding to the image data, the image data storage means for storing the image data, and the thumbnail displayed by the display means in the first to seventh means. Image data storage means for storing thumbnail image data, generation means for generating the thumbnail image data from the image data stored in the image data storage means, and the thumbnail image data generated by the generation means A transfer means for transferring the image data from the image data storage means to the thumbnail image data storage means, a thumbnail display means for displaying the thumbnail image data, and a determination for determining whether or not to display the thumbnail image data Means.

  According to a ninth means, in the image display method for displaying thumbnails considering security of the stored document, the display / non-display of the thumbnail is determined based on the security attribute of the image data, and the security attribute is used as password setting information. When a thumbnail for which a password is input is displayed, the thumbnail display is switched to the thumbnail non-display.

  According to a tenth means, in the ninth means, the switching is executed either when a preset time has elapsed or when a screen initialization event operation is performed by the user. Features.

  The eleventh means corresponds to a procedure for determining whether or not thumbnail display images can be displayed in a computer program loaded on a computer and controlling an image processing apparatus provided with the computer in a predetermined procedure, and when the display is possible. And a procedure for displaying bibliographic information and a dummy image by suppressing the display of the corresponding image when the display is impossible.

  A twelfth means is characterized in that, in the eleventh means, the determination as to whether or not the thumbnail display image can be displayed is made by collating a password attached to the thumbnail image.

  A thirteenth means counts the time from when the twelfth means determines that display is possible by the password verification, starts thumbnail display, and displays the thumbnail display when a preset time has elapsed. It is further characterized by further comprising a procedure for hiding.

  In the embodiment described later, the display means is displayed in the display section 117, the display / non-display control means, the thumbnail display release control means is displayed in the display management section 114, the image data storage means is stored in the storage image storage section 112, and the image data. The storage unit corresponds to the display image data storage unit 115, the generation unit and the transfer unit correspond to the image management unit 111, the thumbnail display unit corresponds to the display unit 117, and the determination unit corresponds to the control unit 110.

  According to the present invention, when thumbnails of stored documents that have been security-authenticated are displayed, thumbnail display is switched from thumbnail display to non-thumbnail display, so the display time of security-authenticated thumbnails is limited, and security authentication is thereby performed. The security of stored documents can be further improved.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

First, in order to facilitate understanding of processing in the present embodiment, an outline of the present embodiment will be described with reference to FIGS. 1 and 2.
FIG. 1 is a diagram showing a screen displaying thumbnails. The thumbnail shown in FIG. 1 has four images, and the image 100 among them is “!”. This image 100 is an image indicating that the display of the thumbnail of the image that should be displayed is suspended. Below this image 100, the file name of the image to be originally displayed is written. Here, it is the “right arrow”. An image whose display has been suspended is an image that needs to be kept secure, for example, an image for which a password is set. In order to display the original image, for example, when the user selects the image 100 with a mouse, a password input screen (FIG. 6) is displayed. When the password check is successful, the thumbnail display hold is canceled. As an example, an image 101 that is a thumbnail of the original image as shown in FIG. 2 is displayed. In this way, in the case of an image that needs to maintain security in the thumbnail display for the image, the thumbnail display is suspended to maintain the security of the document image.
The above is the outline of the present embodiment.

  FIG. 3 is a block diagram showing a software configuration of the image processing apparatus according to the present embodiment. In the figure, the software of the image processing apparatus includes a control unit 110, an image management unit 111, an accumulation image storage unit 112, an image attribute storage unit 113, a display management unit 114, a display image storage unit 115, and a thumbnail non-display unit. A storage unit 116 and a display unit 117 are provided.

  The control unit 110 controls the entire image processing apparatus. The image management unit 111 manages image data such as compression and generation of image data. Further, the image management unit 111 generates thumbnail image data from the image data. The storage image storage unit 112 is managed by the image management unit 111 and stores image data. The image attribute storage unit 113 stores image data attributes to be described later. The display management unit 114 performs management related to thumbnail display. The display image storage unit 115 is managed by the display management unit 114 and stores image data displayed as thumbnails. The thumbnail non-display image storage unit 116 stores a hold image indicating that display of a thumbnail such as the image 100 described in FIG. 1 is put on hold. The display unit 117 is managed by the display management unit 114 and displays an image to the user.

  FIG. 4 is a block diagram illustrating a hardware configuration of the image processing apparatus. In the figure, the image processing apparatus includes a controller board 60, an operation panel 53, an FCU (facsimile control unit) 68, an engine unit 71, and a plotter 72. The FCU 68 includes a G3 standard compatible unit 69 and a G4 standard compatible unit 70.

  The controller board 60 includes a CPU 61, an ASIC 66, an HDD 65, a local memory (MEM-C) 64, a system memory (MEM-P) 63, a north bridge (hereinafter referred to as NB) 62, and a south bridge (hereinafter referred to as SB) 73. , NIC 74 (Network Interface Card), USB device 75, IEEE 1394 device 76 and Centronics device 77.

  The operation panel 53 is connected to the ASIC 66 of the controller board 60. In addition, the SB 73, the NIC 74, the USB device 75, the IEEE 1394 device 76, and the Centronics device 77 are connected to the NB 62 through a PCI bus. The FCU 68, the engine 71, and the plotter 72 are connected to the ASIC 66 of the controller board 60 via a PCI bus. In the controller board 60, the local memory 64, the HDD 65, and the like are connected to the ASIC 66, and the CPU 61 and the ASIC 66 are connected via the NB 62 of the CPU chip set. In this way, if the CPU 61 and the ASIC 66 are connected via the NB 62, it is possible to cope with a case where the interface of the CPU 61 is not disclosed. The ASIC 66 and the NB 62 are not connected via a PCI bus, but are connected via an AGP (Accelerated Graphics Port) 67. In this way, in order to control the execution of one or more processes, the ASIC 66 and the NB 62 are connected not via the low-speed PCI bus but via the AGP 67 to prevent performance degradation.

  The CPU 61 performs overall control of the image processing apparatus. The NB 62 is a bridge for connecting the CPU 61, the system memory 63, the SB 73, and the ASIC 66. The system memory 63 is a memory for storing thumbnails. The SB 73 is a bridge for connecting the NB 62 to the PCI bus and peripheral devices. The local memory 64 is a memory for storing image data.

  The ASIC 66 is an IC for use in image processing having hardware elements for image processing. The HDD 65 is a storage for storing image data, document data, programs, font data, forms, and the like. The operation panel 53 is an operation unit that accepts an input operation from the user and performs display for the user. The thumbnail is displayed on the operation panel 53.

  The storage image storage unit 112 described with reference to FIG. 3 stores image data in the HDD 65 or the local memory 64. Similarly, the image attribute storage unit 113 stores the data in the HDD 65, the local memory 64, or an NV-RAM (Non-Volatile Random Access Memory) (not shown). The display image storage unit 115 and the thumbnail non-display image storage unit 116 are set in the system memory 63 and stored in the system memory 63. The display unit 117 displays thumbnails and the like on the operation panel 53.

  FIG. 5 is an explanatory diagram showing the flow of image data from the image data until the thumbnail is displayed. FIG. 5 shows an entire image 120, a plurality of images 124, 125, and 127, a partial image 121, compressed image data 122, and a reserved image 126. 5 shows a compressed image data area 123, an expanded image data area 128, and a display memory area 129. These areas are memory areas managed by the display image storage unit 115. is there. The whole image 120 corresponds to the image data stored in the storage image storage unit 112. The compressed image data 122 is obtained by compressing image data corresponding to the partial image 121. The image 124 is an image corresponding to the image data obtained by decompressing the compressed image 122 and stored in the decompressed image data area 128. The image 125 is an image corresponding to the image data stored in the display memory 129. An image 126 indicates a reserved image and corresponds to the image data stored in the thumbnail non-display image memory area 118. An image 127 is an image actually displayed on the operation panel 53.

Under such a premise, the flow of image data is as follows. That is, in step S101 in FIG. 5, the image data corresponding to the partial image 121 is compressed, and the compressed image data 122 is generated. In step S102, the compressed image data 122 is transferred to the compressed image data area 123. In step S <b> 103, the compressed image data 122 is decompressed and decompressed in the decompressed image data area 128. The expanded image data is expanded in the display memory 129 in step S104. The image data developed in the display memory 129 is displayed on the operation panel 53 in step S105.
As described above, the transfer of the image data is performed in steps S102, S103, and S104 in FIG.

  Passwords are used for image file security. In order to use a password, it is necessary to set a password. A password setting that is a security attribute of the image file will be described with reference to FIGS.

  In a multi-function copying apparatus which is one of image forming apparatuses, image data is read from a reading device and stored in the HDD 65 in FIG. In this case, a document reading screen as shown in FIG. 7 is displayed on the operation panel of FIG. 4, and reading of document image data is performed by setting reading conditions and the like. If the stored image data is to be secured, a password can be set for the stored image data using the “password” key 200 shown in FIG. FIG. 8 is a diagram showing an example of screen development when the “password” key 200 is pressed. When a password is entered from the numeric keypad on this screen and the “execute key” is pressed, a password is set for the stored image data. When using stored image data for which a password has been set, it is not possible to refer to the image without entering the password, thus maintaining security. FIG. 6 is a diagram showing a document password confirmation screen. A password input request is made on such a screen, and the password is confirmed by an input from a numeric keypad. It is also possible to set a password, cancel the setting, or change the password for image data that has already been stored.

  FIG. 9 is a diagram showing an example of a password editing screen used when changing the password. FIG. 9A shows a screen list of images for displaying a list of accumulated images. When changing the password, when an image whose password is to be changed is selected from the screen of FIG. 9A and the document management key 300 is pressed, the “user name change” for document management is performed as shown in FIG. 9B. , “Change document name” and “Change password” key 301 appear. Therefore, when the “change password” key 301 is pressed, a password editing screen as shown in FIG. 9C is displayed. On this screen, the password of the image can be “no password”, “new password setting”, or “password change”.

  FIG. 10 is a flowchart illustrating a processing procedure of the control unit 110 that performs thumbnail list display. In the routine of the image list display process (step S0), first, the control unit 110 acquires the number of images to be displayed as thumbnails (step S1). Next, it is determined whether or not the display processing for all images to be displayed in the image list has been completed (step S2). If the previous image display process has been completed, the process ends. If not, a determination process A for determining whether or not to display a thumbnail is executed (step S3). Details of this processing will be described with reference to a flowchart described later. After the determination process, it is determined whether image thumbnails can be displayed (step S4). If thumbnail display is possible, the image management unit 111 performs image data transfer processing B (step S5). When the image data is transferred, an image display process is performed, and the image is displayed on the display unit 117 as a thumbnail (step S6). Then, it returns to step S2 again and the process after step S2 is repeated.

  On the other hand, if the thumbnail display of the image is not possible in step S4, the control unit 110 causes the display management unit 114 to display a reserved image prepared in advance (step S7). At this time, the file name of the image to be originally displayed is displayed. And it transfers to step S6, returns to the process of step S2 after the process of step S6, and repeats subsequent processes.

  FIG. 11 is a flowchart showing the processing procedure of the subroutine of step S3 in FIG. In the processing A for determining whether or not to display the corresponding image in step S3, the control unit 110 acquires the image attribute of the image data, and determines whether or not the corresponding image is an image with a password (step S11). This password can be set in the image data. As described with reference to FIG. 7 to FIG. 9, when the image is stored or when the stored image is edited, the password is edited (password not set, new Setting, password change). In this way, password information (presence / absence of password) is set or can be set in the image data, and a thumbnail can be displayed based on the password information. Therefore, if it is determined in step S11 that the file is a password-added file, a thumbnail display suppression flag is set (step S12), and if it is not a password-added flag, the thumbnail display suppression flag is reset (step S13). As a result, whether or not the file has a password is stored in the thumbnail display suppression flag. Then, this flag is referred to in step S4, and the process of step S5 or S7 is executed.

  FIG. 12 is a flowchart showing the processing procedure of the subroutine of step S5 of FIG. In transfer processing B of the corresponding image in step S5, the image management unit 114 first performs image data compression processing of the entire image data (step S21), and the image management unit 114 transfers the compressed image data to the display image storage unit 115. Perform the transfer process. Next, the display management unit 114 performs decompression processing of the compressed image data (step S23), and DMA-transfers the decompressed image data to the display storage unit 115 (step S24).

  FIG. 13 is a flowchart showing a processing procedure after the thumbnail image list is displayed. In the routine after the thumbnail image list display (step S30), it is checked whether or not there is a thumbnail non-display image in the image list (step S31), and if there is, it is further checked whether or not a thumbnail display suppression image has been selected (step S31). Step S32). If it is selected in this check, it is checked whether or not the reason for suppressing the thumbnail display is an image with a password (step S33). If the image has a password, the password input screen shown in FIG. 6 is displayed. (Step S34). Therefore, if the password is input from the displayed password input screen and the password verification is OK (step S35-OK), the image transfer is performed as already described in steps S36 and 37, and the thumbnail display of the image is performed. Do. An example thereof corresponds to FIG. In step S32 to S35, it is determined whether or not a thumbnail display hold image by password setting is selected. If it is selected, for example, an image 100 as shown in FIG. 1 is displayed.

  Thus, when password information (presence / absence of a password) is set in the image data, a thumbnail can be displayed based on the password information. In addition, when security is applied to the image in this way, the thumbnail is not displayed unnecessarily, so that the security of the image can be maintained.

  FIG. 14 is a flowchart showing a control procedure in which the display is initialized after the lapse of the specified time and the thumbnail display of the password-added image is suppressed. In the processing procedure after the image list display (step S40), after the display initialization timer is initialized (step S41), the processing from step S31 to step S37 in FIG. 13 is executed, and the image display processing of the corresponding image is performed in step S37. After execution, the display initialization timer is counted up (step S42), and the presence / absence of a screen initialization key event is checked (step S43). If there is no screen initialization key event, it is further checked whether or not the display initialization timer has exceeded a specified value. If not, the process returns to step S31 and repeats the processing from that step onwards, and the screen initialization key event is repeated. If there is (step S43-Yes), and if the display initialization timer exceeds the specified value (step S44-Yes), the routine of the image list display process shown in FIG. 10 described above in step S45 (step S0) Execute. Then, when the process of step S45 is completed, the process returns to step S41 and the subsequent processes are repeated. Note that the screen initialization event by the user corresponds to a mode clear key operation for clearing the setting mode and a residual heat key operation for shifting to the residual heat state.

  In the processing procedure shown in FIG. 14, in steps S41 and S42 to S45, the display is initialized after the lapse of the specified time, and the thumbnail display of the password-added image is suppressed. This also shows a mechanism in which thumbnails of password-protected images are hidden. As a result, an image with a password is not disclosed unnecessarily, and image security is maintained.

  FIG. 15 is a diagram illustrating a “thumbnail display state” after selecting a thumbnail image of a password-added image and a “state that does not require a password input check when re-selecting”. The area S100 is an image non-selected state, the thumbnail is not displayed, and a thumbnail image can be displayed by inputting a password. An area S200 is a state in which an image is selected from the state of S100 and a thumbnail is displayed by inputting a password. The thumbnail display state and the check mechanism for thumbnail display are changed at elapsed times t1 and t2 from the image selection state. In the area S300, the thumbnail displayed in S200 is not displayed from the viewpoint of security. However, this is an area in which thumbnail display is possible only by selecting an image without entering a password in consideration of a decrease in operability for re-entering the password each time. On the other hand, in the region S400, the time has passed since the image selection further than S300. Here, for security reasons, thumbnails are not displayed, and a password is required to display thumbnails. The region S400 is the same as S100 in terms of state.

  Thus, by configuring the thumbnail display of the password-added image and the password input check state for displaying the thumbnail in two stages, both the security of the image and the improvement of the operability can be realized.

  As described above, according to the present embodiment, the following effects can be obtained.

1) Since it is not desirable for security to display thumbnails of images with security attributes indefinitely, the display / non-display of thumbnails is determined based on the security attributes of image data. In other words, it is possible to hide images that have been security-authenticated by password setting or the like and are displayed as thumbnails. As a result, it is possible to maintain the security of the protected image.

2) The images displayed as thumbnails with time as a parameter are hidden. In other words, the thumbnail display is not displayed when the specified time has elapsed. As a result, it is possible to maintain the security of the security protected image. The specified time is set according to the time elapsed from the start of the operation of the screen or the time after displaying the thumbnail with the password input.

3) Security-authenticated images with password settings etc., and images displayed as thumbnails are hidden at events by user operations. As a result, it is possible to maintain the security of the security protected image.

4) Since the thumbnail display cancellation is executed at an event detected at the earliest of the specified time or the user operation, that is, an image displayed as a thumbnail that has been security-authenticated by password setting or the like is hidden. Therefore, thumbnail display / non-display control with high operability can be realized.

5) Thumbnails are hidden from images that have been security-authenticated by password settings, etc., from the viewpoint of image security. However, for security reasons, once thumbnails are viewed, the thumbnails can be viewed at an early timing. I try to make it impossible. However, if you can't see it early, you'll have to enter your password again to see it again. Therefore, in the above-described embodiment, when the specified time is set to two stages and the thumbnail is not displayed in the first stage, the thumbnail is displayed without inputting a password when selecting a file, and the first stage is passed in the second stage. So, for security reasons, you can re-display the thumbnail by entering the password. As a result, in the first stage, the thumbnail display can be re-displayed without the trouble of entering a password. In the second stage, a third party who is not in front of the user machine cannot display the thumbnail without entering the password. is there. As a result, security can be improved and operability can be prevented from being lowered.

It is a figure which shows the screen which suspended the display of the thumbnail which concerns on embodiment of this invention. It is a figure which shows the screen which cancel | released the suspension of the display of the thumbnail in FIG. It is a block diagram which shows the software structure of the image processing apparatus which concerns on this embodiment. It is a block diagram which shows the hardware constitutions of the image processing apparatus which concerns on this embodiment. It is explanatory drawing which shows the flow of data until a thumbnail is displayed from image data. It is a figure which shows a document password confirmation screen. It is a figure which shows the document storage screen by original reading. It is a figure which shows the password setting screen of a document. It is a figure which shows the list | wrist of a stored image, a document management, and a password edit screen. It is a flowchart which shows the process sequence of the control part 110 which performs a thumbnail list display. It is a flowchart which shows the process sequence of the subroutine of step S3 of FIG. It is a flowchart which shows the process sequence of the subroutine of step S5 of FIG. It is a flowchart which shows the process sequence after a thumbnail image list display. It is a flowchart which shows the control procedure which suppresses the thumbnail display of the image with a password, and a display is initialized after progress of regulation time. It is a figure which shows the "thumbnail display state" after the thumbnail image selection of the image with a password, and the "password input check necessity state at the time of re-selection".

Explanation of symbols

DESCRIPTION OF SYMBOLS 100 Image 101 Control part 111 Image management part 112 Storage image memory | storage part 113 Image attribute storage memory part 114 Display management part 115 Display image memory part 116 Thumbnail non-display image memory part

Claims (13)

In an image processing apparatus that includes a display unit that displays a thumbnail of an image corresponding to image data, and that displays a thumbnail in consideration of security of an accumulated document,
Thumbnail display / non-display control means for determining whether to display / hide thumbnails based on security attributes of image data;
Thumbnail display cancellation control means for switching from thumbnail display to thumbnail non-display when a security-authenticated thumbnail is displayed;
An image processing apparatus comprising:   The image processing apparatus according to claim 1, wherein the thumbnail display cancellation control unit hides thumbnails at a preset time.   The image processing apparatus according to claim 1, wherein the security attribute is password setting information, and the security authentication is a password input.   4. The image processing apparatus according to claim 3, wherein the thumbnail display cancellation control means hides the thumbnail at a screen initialization event by the user after the password is input and the thumbnail is displayed.   The thumbnail display release control means is configured to detect an event detected at an earlier time when a screen initialization event operation is performed by the user after a preset time or password is input and a thumbnail is displayed. 4. The image processing apparatus according to claim 3, wherein thumbnails are not displayed.   When the thumbnail display cancellation control means hides the thumbnails for a preset time, the first stage of transitioning to the thumbnail display state by selecting the corresponding image, the second stage of transitioning to the thumbnail display state by inputting the password by selecting the corresponding image The image processing apparatus according to claim 4, comprising the following two stages.   The image processing apparatus according to claim 6, wherein the thumbnail display state transitions sequentially from the first stage to the second stage as time elapses. Image data storage means for storing image data;
Image data storage means for storing thumbnail image data corresponding to thumbnails displayed by the display means;
Generating means for generating the thumbnail image data from the image data stored in the image data storage means;
Transfer means for transferring the thumbnail image data generated by the generation means from the image data storage means to the thumbnail image data storage means;
Thumbnail display means for displaying the thumbnail image data;
Determining means for determining whether to display the thumbnail image data;
The image processing apparatus according to claim 1, further comprising: In an image display method for displaying thumbnails in consideration of the security of stored documents,
Based on the security attribute of the image data, the display / non-display of the thumbnail is determined,
An image display method characterized in that, when the security attribute is password setting information and a thumbnail into which a password is input is displayed, the thumbnail display is switched to the thumbnail non-display.   The image display method according to claim 9, wherein the switching is executed when a preset time has elapsed or when a screen initialization event operation is performed by a user. In a computer program loaded on a computer and executing display control of thumbnail images,
A procedure for determining whether thumbnail display images can be displayed;
A procedure for displaying a corresponding image when the display is possible;
Suppressing the display of the corresponding image when the display is impossible, and displaying the bibliographic information and a dummy image;
A computer program comprising:   12. The computer program according to claim 11, wherein whether or not the thumbnail display image can be displayed is determined by checking a password attached to the thumbnail image. It is determined that the password can be displayed by the password verification, and further includes a procedure of counting a time from the start of the thumbnail display and hiding the thumbnail display when a preset time has elapsed. The computer program according to claim 12, characterized in that:

Images