Abstract:
Disclosed is an image display apparatus including: a display section; a theme icon storage section which stores a plurality of sets of a theme of an image corresponded to a theme icon representing the theme; an image storage section which stores an image folder storing a sequence of a plurality of images; an image theme detecting section which detects an image theme of each image; a representative theme extracting section which extracts an image theme which represents an image line of the divided sequence of the plurality of images as an image line representative theme for each image line; and a folder icon display control section which positions each theme icon corresponding to the plurality of image line representative themes extracted by the representative theme extracting section according to an order of the image line to form a folder icon and allows the display section to display the folder icon.

Description:
BACKGROUND OF THE INVENTION 
     1. Field of the Invention 
     The present invention relates to an image display apparatus, image display method and recording medium recording an image display program. 
     2. Description of the Related Art 
     Conventionally, in an image display apparatus which imports a plurality of pieces of image data and displays the image, when a plurality of images are displayed at once it is possible to classify and display the images by theme. Specifically, in one technique, theme marks representing various themes are prepared. When a sequence of images are displayed arranged in order of shooting, etc., the sequence of images are divided in a line of images by theme and the theme mark corresponding to the theme of the image line is displayed first in each image line. In another technique, a plurality of images are classified by theme and displayed in a tree form. 
     However, according to the conventional techniques, the theme mark needs to be followed by sight, or classification by the tree needs to be followed to the tip in order to understand the course of change of the themes in the sequence of images in the image folder. 
     SUMMARY OF THE INVENTION 
     The present invention has been made in consideration of the above situation, and one of the main objects is to provide an image display apparatus and program with which a course of change of themes in a sequence of images can be understood at one glance. 
     In order to achieve any one of the above advantages, according to an aspect of the present invention, there is provided an image display apparatus including: 
     a display section; 
     a theme icon storage section which stores a plurality of sets of a theme of an image corresponded to a theme icon representing the theme; 
     an image storage section which stores an image folder storing a sequence of a plurality of images; 
     an image theme detecting section which detects an image theme of each image of the sequence of the plurality of images; 
     a representative theme extracting section which extracts an image theme which represents a content of an image line of the divided sequence of the plurality of images as an image line representative theme for each image line from the image theme detected by the image theme detecting section; and
         a folder icon display control section which positions each theme icon corresponding to the plurality of image line representative themes extracted by the representative theme extracting section according to an order of the image line in the sequence of the plurality of images to form a folder icon and allows the display section to display the folder icon as the folder icon of the image folder.       

     According to the present invention, the image theme of each image of the sequence of plurality of images is detected, an image theme which represents the content of the image line is extracted as the image line representative theme for each image line of the divided sequence of plurality of images from the detected image theme, a folder icon is formed by positioning the theme icons corresponding to the extracted plurality of image line representative themes according to the order of the image line, and the formed folder icon is displayed as the folder icon of the image folder. Consequently, the course of change of theme in a sequence of images stored in the image folder can be understood at one glance. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       The present invention and the above-described objects, features and advantages thereof will become more fully understood from the following detailed description with the accompanying drawings and wherein; 
         FIG. 1  is a block diagram showing a schematic configuration of an image display apparatus; 
         FIG. 2  is a diagram showing a schematic configuration of the image display apparatus; 
         FIG. 3  is a diagram showing a data structure of an image folder; 
         FIG. 4  is a diagram showing a data structure of an icon data table; 
         FIG. 5  is a diagram showing a data structure of an image/theme corresponding table; 
         FIG. 6  is a diagram showing a data structure of an image/theme corresponding table; 
         FIG. 7  is a flowchart showing a flow of image display processing; 
         FIG. 8  is a flowchart showing a flow of folder icon forming processing; 
         FIG. 9  is a flowchart showing a flow of folder icon enlarged display processing; 
         FIG. 10A  to  FIG. 10C  are diagrams showing a display content of a display section; 
         FIG. 11A  to  FIG. 11B  are diagrams showing a display content of a display section; 
         FIG. 12A  to  FIG. 12B  are diagrams showing a display content of a display section; 
         FIG. 13A  to  FIG. 13C  are diagrams showing a display content of a display section; 
         FIG. 14A  to  FIG. 14B  are diagrams showing a display content of a display section; 
         FIG. 15A  to  FIG. 15B  are diagrams showing a display content of a display section; 
         FIG. 16A  to  FIG. 16B  are diagrams showing a display content of a display section; 
         FIG. 17A  to  FIG. 17B  are diagrams showing a display content of a display section; and 
         FIG. 18  is a diagram showing a data structure of a modification of an icon data table. 
     
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 
     Preferred embodiments for carrying out the present embodiment are described in detail with reference to the attached drawings. However, the scope of the invention not limited to the embodiments and the illustrated examples. 
     [Configuration] 
       FIG. 1  is a block diagram showing a schematic configuration of an image display apparatus  1  employing the present invention. As shown in  FIG. 2 , the image display apparatus  1  of the present embodiment is, for example, a digital photograph frame placed on a desk. The image display apparatus  1  obtains image data from an external device, etc. (for example, a digital camera) and displays an image according to the obtained image data. 
     Specifically, as shown in  FIG. 1 , the image display apparatus  1  includes, a display section  11 , an input section  12 , a communication section  13 , a storage medium reading section  14 , a ROM  15 , a RAM  16 , a CPU  18 , etc. 
     The display section  11  includes a liquid crystal display (LCD), organic electroluminescence (EL) display, etc. and displays various information such as a later described folder icon F (see  FIG. 10A ) of an image folder  152  according to a display signal from the CPU  18 . The display of the display section  11  of the present embodiment is provided as one with a touch panel  120  on an entire face of a display screen. 
     The input section  12  includes the above described touch panel  120  and a remote controller  121 , and outputs an operation signal corresponding to user operation to the CPU  18 . The remote controller  121  includes, for example, a cursor key to perform selection of an image folder or operation of forwarding an image, an enter key to perform determination operation, a return key to return processing to a state of display directly before, etc. 
     The communication section  13  performs data communication with other electronic devices such as a personal computer or camera, and in the present embodiment, transmits and receives information in the ROM  15 . Moreover, this communication section  50  can connect to the Internet, and with this, can communicate with external devices connected to the Internet. The communication method can be wireless or wired. 
     The storage medium reading section  14  includes a card slot  140  and reads information from an external information storage medium  14   a  attached to the card slot  140  and stores information in the external information storage medium  14   a . Information in the ROM  15  or the RAM  16  can be recorded in the external information storage medium  14   a.    
     The ROM  15  is a memory which stores a program or data to realize various functions of the image display apparatus  1 . In the present embodiment, ROM  15  stores an image display program  150  regarding the present invention, image folder group  151 , icon data table  153 , image/theme corresponding table  154 , etc. 
     The image display program  150  is a program for allowing the CPU  18  to perform a later described image display processing (see  FIG. 7  to  FIG. 9 ). 
     The image folder group  151  includes a plurality of image folders  152 . As shown in  FIG. 3 , each image folder  152  stores image data of a sequence of a plurality of images. Each piece of image data in the image folder  152  is corresponded to a forming time and date (shooting time and date). 
     As shown in  FIG. 4 , the icon data table  153  stores a theme name corresponded to a theme icon I representing the theme regarding a plurality of types of image themes which can be represented by an image. In the present embodiment, the icon data table  153  stores a plurality of types of general images (hereinafter referred to as typical image) TG representing each theme for each theme. The icon data table  153  stores a layout position in a vertical direction when the theme icon I is included in a folder icon F of the image folder  152  for each theme icon I. 
     The image/theme corresponding table  154  is provided for each image folder  152  and as shown in  FIG. 5  and  FIG. 6 , stores one to three themes of an image corresponded with each image in the image folder  152 . The image/theme corresponding table  154  stores an image theme (hereinafter referred to as image line representative theme) which represents a content of an image line L corresponded to each image line L obtained by dividing the stored image. The image/theme corresponding table  154  stores whether or not the image theme of the image and the image line representative theme match corresponded with each image in the image line L. 
     The RAM  16  includes a memory area which temporarily holds various programs performed by the CPU  18  and data, etc. regarding performing such programs. 
     The CPU  18  performs processing based on a predetermined program according to an input instruction, performs instruction to each functional section, transfer of data, etc. and generally controls the image display apparatus  1 . Specifically, the CPU  18  reads out various programs stored in the ROM  15  according to an operation signal, etc. input from the input section  12  and performs processing according to the program. Then, the CPU  1  stores the processing result in the RAM  16  and suitably outputs the processing result to the display section  11 . 
     [Operation] 
     Next, the image display processing by the image display apparatus  1  is described with reference to  FIG. 7  to  FIG. 9 . 
     As shown in  FIG. 7 , in the image display processing, first the CPU  18  judges whether or not a new image folder  152  (hereinafter referred to as image folder  152 N) is input through the communication section  13  (step S 1 ) and when it is judged that it is not input (step S 1 ; No), the processing advances to a later described step S 3 . 
     When it is judged that a new image folder  152 N is input in step S 1  (step S 1 ; Yes), the CPU  18  stores the image folder  152 N in the image folder group  151  of the ROM  15  and then performs folder icon forming processing (step S 2 ). 
     Specifically, as shown in  FIG. 8 , in the folder icon forming processing, first the CPU  18  forms a new image/theme corresponding table  154  (hereinafter referred to as image/theme corresponding table  154 N) in which data is not stored for the new input image folder  152 N and also sorts each piece of image data in the image folder  152 N in an order according to time (in the present embodiment, in an order from image data with an old forming time and date) to store the data in the image/theme corresponding table  154 N (step T 1 ). 
     Next, the CPU  18  specifies each piece of image data in the image folder  152 N in order as a processing target, compares the image of the image data of the processing target (hereinafter referred to as an image of the processing target) with each typical image TG in the icon data table  153 , searches for a typical image TG similar to the image of the processing target in the icon data table  153 , and stores the three types of image themes with the three highest detected number among the image themes of the detected typical images TG as the image theme of the image of the processing target in the image/theme corresponding table  154 N (step T 2 ). Conventionally, well known image matching techniques can be used as determining the similarity between the image of the processing target and the typical image TG. 
     Next, the CPU  18  divides the sequence of images in the image/theme corresponding table  154 N into three image lines L, and with respect to each image line L, the CPU  18  an image theme which represents the content of the image line L among the plurality of image themes corresponded to each image in the image theme corresponding table  154 N and stores the image theme as the image line representative theme corresponded to the image line L in the image/theme corresponding table  154 N (step T 3 ). 
     Next, the CPU  18  judges whether or not the image theme of each image in each image line L matches with the image line representative theme and “∘” showing there is a match or “x” showing there is no match is corresponded to the image and stored in the image/theme corresponding table  154 N (step T 4 ). 
     Next, in order to form the folder icon F of the image folder  152 N, first the CPU  18  positions each theme icon I corresponding to the three image line representative themes on a plain folder icon stored in the ROM  15  by default (step T 5 ). Specifically, the CPU  18  positions the three theme icons I aligned from left to right according to the order of the image line L in the image/theme corresponding table  154 N (order of image line representative theme). Preferably, the CPU  18  refers to the forming date and time of each piece of image data in each image line L and positions each theme icon I so that the theme icon I of an old image line L is positioned toward the left side and the theme icon I of a new image line L is positioned toward the right side. 
     Next, the CPU  18  adjusts each theme icon I positioned on the folder icon F based on the layout position in the vertical direction stored in the icon data table  153  of the theme icon I and completes forming the folder icon F (step T 6 ). Preferably, the CPU  18  makes minor adjustments of the position of each theme icon I so that the three theme icons I do not overlap on one another. 
     Next, the CPU  18  registers the formed folder icon F as the folder icon of the image folder  152 N (step T 7 ) and ends the folder icon forming processing. 
     When the above folder icon forming processing ends, as shown in  FIG. 7 , next, the CPU  18  displays as a list the folder icon F of each image folder  152  in the image folder group  151  on the image section  11  (step S 3 ). 
     Next, the CPU  18  judges whether or not the user selected any one of the folder icons F (step S 4 ) and when it is judged that it is not selected (step S 4 ; No), the processing advances to another processing. 
     When it is judged that any one of the folder icons F is selected in step S 4  (step S 4 ; Yes), the CPU  18  performs the enlarged display processing of the folder icon F (step S 5 ). 
     Specifically, as shown in  FIG. 9 , in the enlarged display processing, first the CPU  18  displays an enlarged display of the selected folder icon F (hereinafter referred to as selected folder icon FS) on the display section  11  (step U 1 ). With this, each theme icon I on the selected folder icon FS is displayed with an enlarged display. 
     Next, the CPU  18  refers to the image/theme corresponding table  154  of the image folder  152  corresponding to the selected folder icon FS, detects the image line L (image line L in which the theme of each theme icon I is the image line representative theme) corresponded with the image line representative theme corresponding to each theme icon I on the selected folder icon FS and displays as a thumbnail display each image in the corresponding image line L on each enlarged theme icon I (step U 2 ). Specifically, here the CPU  18  aligns each image from left to right in the order starting from an image with an old forming time and date and also displays images which have a very close forming time and date aligned vertically. Here, the CPU  18  also adjusts the size of each thumbnail image so that all images in the image line L are displayed at once on the theme icon I. 
     Next, among each thumbnail image displayed on the theme icon I, the CPU  18  displays with distinction the image stored as not matching with the image line representative theme in the image/theme corresponding table  154  (step U 3 ) and the enlarged display processing ends. The present embodiment is described as the CPU  18  displaying with distinction the thumbnail, image which does not match the image line representative theme by applying a “x” mark to the thumbnail image in step U 3 , however, other methods of displaying with distinction can be employed, such as surrounding with a certain color, etc. 
     When the above enlarged display processing of the folder icon ends, as shown in  FIG. 7 , next the CPU  18  judges whether or not any one of the thumbnail images on the selected folder icon FS displayed enlarged is specified by user operation (step S 6 ), and when it is judged that it is not specified (step S 6 ; No), the processing advances to another processing. In the present embodiment, for example the thumbnail image can be specified with operation by touch. 
     When it is judged that any one of the thumbnail images is specified in step S 6  (step S 6 ; Yes), the CPU  18  displays the specified thumbnail image as an enlarged display in a position which does not overlap with the other thumbnail image (step S 7 ). In step S 7 , the CPU  18  displays the thumbnail image smaller than a standard size (in the present embodiment, a size where the image is displayed fully on the screen). 
     Next, the CPU  18  judges whether or not any one of the thumbnail images on the selected folder icon FS displayed enlarged is selected by user operation (step S 8 ), and when it is judged that it is not selected (step S 8 ; No), the processing advances to another processing. In the present embodiment, for example, the thumbnail image can be selected by double tapping operation. 
     When it is judged that any one of the thumbnail images is selected in step S 8  (step S 8 ; Yes), the CPU  18  enlarges the selected thumbnail image to a standard size (in the present embodiment, a size where the image is displayed fully on the screen) and displays the image (step S 9 ). 
     Next, the CPU  18  judges whether or not an operation to return the processing to a state of display directly before is performed (step S 10 ), and when it is judged that it is performed (step S 10 ; Yes), the processing returns to the above described step S 6 . 
     When it is judged that the operation to return is not performed in step S 10  (step S 10 ; No), the CPU  18  judges whether or not operation to close the selected folder icon FS is performed (step S 11 ) and when it is judged that it is performed (step S 11 ; Yes), the processing returns to the above described step S 3 . 
     When it is judged that the operation to close the selected folder icon FS is not performed in step S 11  (step S 11 ; No), the CPU  18  judges whether or not end operation is performed (step S 12 ). 
     When it is judged that the end operation is not performed in step S 12  (step S 12 ; No) the CPU  18  advances another processing and when it is judged that the end operation is performed (step S 12 ; Yes), the image display processing ends. 
     (Example of Operation of Image Display Processing) 
     Next, the image display processing is specifically described with reference to  FIG. 10A  to  FIG. 17B . 
     Operation Example (1) 
     First, when the image folder  152 , shown in the upper side of  FIG. 3 , is input (step S 1 ; Yes), as shown in  FIG. 5 , a new image/theme corresponding table  154  is formed, each piece of image data in the image folder  152  is sorted in order from the data with the forming date and time which is old, and is stored in the image/theme corresponding table  154  (step T 1 ). 
     Next, each piece of image data in the image folder  152  is specified as the processing target in order, the image of the processing target is compared with each typical image TG in the icon data table  153 , the typical image TG similar to the image of the processing target searched from the icon data table  153 , and among the image themes of each detected typical image TG, the three types of image themes with the three highest detected number are stored as the image theme of the image of the processing target in the image/theme corresponding table  154 N (step T 2 ). 
     Next, the sequence of images in the image/theme corresponding table  154 N is divided into three image lines L, image themes which represent the content of the image line L, here themes “ship”, “island”, “fish”, are extracted from the plurality of image themes corresponded to each image in the image/theme corresponding table  154 N for each image line L and the extracted image themes are stored in the image/theme corresponding table  154 N corresponded with the image line L as image line representative themes (step T 3 ). 
     Next, it is judged whether or not the image theme of each image in each image line L matches with the image line representative theme, and “∘” showing there is a match or “x” showing there is no match are stored corresponded to the image in the image/theme corresponding table  154 N (step T 4 ). 
     Next, as shown in the top left portion of  FIG. 10A , the theme icons I corresponding to the three image line representative themes “ship”, “island”, “fish” are positioned to be aligned from left to right on the plain folder icon (step T 5 ). Each theme icon I is adjusted up and down based on the layout position in the vertical direction stored in the icon data table  153  and the forming of the folder icon F ends (step T 6 ). The folder icon F is displayed on the display section  11  (step S 3 ). 
     Similarly, when the image folder  152  shown in the lower side of  FIG. 3  is input (step S 1 ; Yes), after forming the image/theme corresponding table  154  as shown in  FIG. 6 , as shown in the top left portion of  FIG. 10A , the folder icon F in which the theme icons I corresponding to the three image line representative themes “bus”, “shanghai crab”, “lake” are positioned is formed (step T 6 ) and displayed on the display section  11  (step S 3 ). 
     Next, when the user selects the folder icon F in the upper side of  FIG. 10A  (step S 4 ; Yes), as shown in  FIG. 10E , the selected folder icon FS is displayed enlarged (step U 1 ). With this, each theme icon I on the selected folder icon FS is displayed enlarged. 
     Next, the image/theme corresponding table  154  (image/theme corresponding table shown in  FIG. 5 ) regarding image folder  152  (image folder in the upper side of  FIG. 3 ) corresponding to the selected folder icon FS is referred, the image line L corresponding to each theme icon I (“ship”, “island”, “fish”) on the selected folder icon FS is detected, and the images in the corresponding image line L are displayed as a thumbnail display on the enlarged theme icons I (step U 2 ). Among the thumbnail images displayed on the theme icons I, the image which is stored as not matching with the image line representative theme in the image/theme corresponding table  154  is and displayed distinguished with a “x” mark (step U 3 ). The illustration of some of the thumbnail images are simplified in  FIG. 10B  and the later described  FIG. 11A , etc. 
     Next, when the user specifies the thumbnail image shown by an arrow in  FIG. 10B  by touch operation (step S 6 ; Yes), as shown in the top left portion of  FIG. 10E , the specified thumbnail image is displayed enlarged in a position which does not overlap with the other thumbnail image (step S 7 ). 
     Next, when the user selects the thumbnail image shown with the arrow in  FIG. 10B  by double tap operation (step S 8 ), as shown in  FIG. 10C , the selected thumbnail image is displayed fully on the screen (step S 9 ). 
     Next, after the user performs the return operation (step S 10 ; Yes), when the user specifies the thumbnail image shown by an arrow in  FIG. 11A  by touch operation (step S 6 ; Yes), as shown in the top left portion of the diagram, the specified thumbnail image is displayed enlarged in a position which does not overlap with the other thumbnail image (step S 7 ). Then, when the user selects the same thumbnail image by double tap operation (step S 8 ), as shown in  FIG. 11B , the selected thumbnail image is displayed fully on the screen (step S 9 ). 
     Next, after the user performs the return operation (step S 10 ; Yes), when the user specifies the thumbnail image shown by an arrow in  FIG. 12A  by touch operation (step S 6 ; Yes), as shown in the top right portion of the diagram, the specified thumbnail image is displayed enlarged in a position which does not overlap with the other thumbnail image (step S 7 ). Then, when the user selects the same thumbnail image by double tap operation (step S 8 ), as shown in  FIG. 12B , the selected thumbnail image is displayed fully on the screen (step S 9 ). 
     Next, when the user performs operation of closing the selected folder icon FS (step S 11 ; Yes), as shown in  FIG. 13A , the folder icons F of each image folder  152  are displayed as a list, on the display section  11  (step S 3 ). 
     Next, when the user selects the folder icon F in the lower side of  FIG. 13A  (step S 4 ; yes), as shown in  FIG. 13B , the selected folder icon FS is displayed enlarged (step U 1 ). With this, the theme icons are displayed enlarged on the selected folder icon FS. 
     Next, the image/theme corresponding table  154  (image/theme corresponding table shown in  FIG. 6 ) regarding image folder  152  (image folder in the lower side of  FIG. 3 ) corresponding to the selected folder icon FS is referred, the image line L corresponding to each theme icon I (“bus”, “shanghai crab”, “lake”) on the selected folder icon FS is detected, and the images in the corresponding image line L are displayed as a thumbnail display on the enlarged theme icons I (step U 2 ). Among the thumbnail images displayed on the theme icons I, the image which is stored as not matching with the image line representative theme in the image/theme corresponding table  154  is displayed distinguished with a “x” mark (step U 3 ). 
     Next, when the thumbnail image shown by an arrow in  FIG. 1B  is specified by touch operation by the user (step S 6 ; Yes), as shown in the top left portion of  FIG. 13B , the specified thumbnail image is displayed enlarged in a position which does not overlap with the other thumbnail image (step S 7 ). Next, when the user selects the same thumbnail image by double tap operation (step S 8 ), as shown in  FIG. 13C , the selected thumbnail image is displayed fully on the screen (step S 9 ). 
     Next, after the user performs the return operation (step  10 ; Yes), when the user specifies the thumbnail image shown by an arrow in  FIG. 14A  by touch operation (step S 6 ; Yes), as shown in the top right portion of the diagram, the specified thumbnail image is displayed enlarged in a position which does not overlap with the other thumbnail image (step S 7 ). Then, when the user selects the same thumbnail image by double tap operation (step S 8 ), as shown in  FIG. 14B , the selected thumbnail image is displayed fully on the screen (step S 9 ). 
     Next, after the user performs the return operation (step S 10 ; Yes), when the user specifies the thumbnail image shown by an arrow in  FIG. 15A  by touch operation (step S 6 ; Yes), as shown in the top right portion of the diagram, the specified thumbnail image is displayed enlarged in a position which does not overlap with the other thumbnail image (step S 7 ). Then, when the user selects the same thumbnail image by double tap operation (step S 8 ), as shown in  FIG. 15B , the selected thumbnail image is displayed fully on the screen (step S 9 ). 
     Next, after the user performs the return operation (step S 10 ; Yes), when the user specifies the thumbnail image shown by an arrow in  FIG. 16A  by touch operation (step S 6 ; Yes), as shown in the top right portion of the diagram, the specified thumbnail image is displayed enlarged in a position which does not overlap with the other thumbnail image (step S 7 ). Then, when the user selects the same thumbnail image by double tap operation (step S 8 ), as shown in  FIG. 16B , the selected thumbnail image is displayed fully on the screen (step S 9 ). 
     Next, after the user performs the return operation (step S 10 ; Yes), when the user specifies the thumbnail image shown by an arrow in  FIG. 17A  by touch operation (step S 6 ; Yes), as shown in the top right portion of the diagram, the specified thumbnail image is displayed enlarged in a position which does not overlap with the other thumbnail image (step S 7 ). Then, when the user selects the same thumbnail image by double tap operation (step S 8 ), as shown in  FIG. 17B , the selected thumbnail image is displayed fully on the screen (step S 9 ). 
     As described above, according to the image display apparatus  1  of the present embodiment, as shown in  FIG. 5 ,  FIG. 6 ,  FIG. 8   FIG. 10A  to  FIG. 17B , etc., the image theme of each image of the sequence of plurality of images is detected, an image theme which represents the content of the image line L is extracted as the image line representative theme for each image line. L of the divided sequence of plurality of images from the detected image theme, a folder icon F is formed by positioning the theme icons I corresponding to the extracted plurality of image line representative themes according to the order of the image line L, and the formed folder icon F is displayed as the folder icon F of the image folder  152 . Consequently, the course of change of theme in a sequence of images stored in the image folder  152  can be understood at one glance. 
     As shown in steps U 1  to U 2  in  FIG. 9 ,  FIG. 10B , etc., the folder icon F is displayed enlarged based on user operation on the folder icon F, and on each theme icon I included in the folder icon F, each image of the image line L corresponded to the image line representative theme is displayed as a thumbnail display on each theme icon I which the image line representative theme corresponds to. Consequently, the content of the image stored in the image folder  152  can be easily understood. 
     As shown in step U 2  in  FIG. 9 ,  FIG. 10B , etc., the size of each thumbnail image is adjusted so that all of the images of the image line L corresponded to the image line representative theme corresponding to the theme icon. I are displayed on the respective theme icon I. Consequently, the content of the image stored in the image folder  152  can be securely understood. 
     Needless to say, the specific configuration and operation of each component of the configuration of the image display apparatus  1  of the present embodiment can be suitably modified, without leaving the scope of the present invention. 
     For example, the image display apparatus of the present invention is described as a photograph frame, etc. in the above embodiment. However, the product in which the present invention can be employed is not limited to such product, and can be generally employed in electronic devices such as a cellular phone, a personal computer, a PDA (Personal Digital Assistant), game devices, etc. The image display program  150  of the present invention can be stored in a memory card CD, etc. which can be attached and detached to and from the image display apparatus  1 . 
     It is described that the icon data table  153  stores the theme name, the theme icon I and the typical image TG, corresponded to each other, however, as shown in  FIG. 18 , the theme name, the theme icon I and the keyword relating to the theme name can be stored corresponded to each other. In this case, in the above described step T 2 , the CPU  18  can search the image on the Internet using each keyword, and the detected image can be used as the typical image TG. 
     The entire disclosure of Japanese Patent Application No. 2010-207434 filed on Sep. 16, 2010 including specification, claims, drawings and abstract are incorporated herein by reference in its entirety. 
     Although various exemplary embodiments have been shown and described, the invention is not limited to the embodiments shown. Therefore, the scope of the invention is intended to be limited solely by the scope of the claims that follow.