JP4956479B2 - Image file management apparatus and digital camera - Google Patents

Description

  The present invention relates to an image file management apparatus and a digital camera, and more particularly to an image file management apparatus and a digital camera that delete and organize image files in a storage medium.

  In a digital camera, image data obtained by shooting is stored in a storage medium such as a memory card as an image file (for example, an Exif file) in a predetermined format.

  In recent years, storage media used for digital cameras and the like have increased in capacity, and a large amount of image files can be stored in one storage medium.

  However, if a large number of image files are stored in one storage medium, there is a problem that it is difficult to find an image that is desired to be viewed at the time of browsing.

  Therefore, the user needs to delete unnecessary image files as necessary and organize stored image files.

  In general, when deleting an image file, the image of the image file to be deleted is displayed on the monitor, and after the deletion instruction is given, a confirmation (confirmation of whether or not to delete) is performed, and then the image file is actually deleted. The

  However, even when such a confirmation operation is performed, the image file may be deleted by mistake.

  Therefore, Patent Document 1 proposes that the deleted image can be restored without compressing the storage capacity of the storage medium by compressing and saving the image file of the image instructed to be deleted. Yes.

In Patent Document 2, in order to improve the browsing of files in a storage medium, when an instruction for grouping files is given, a common part is extracted and extracted from the file names of a plurality of files for which the grouping instruction is given. It has been proposed to assign a directory name based on the common part and move the file to that directory.
Japanese Patent Laid-Open No. 9-219648 JP-A-8-314781

  However, the method of Patent Document 1 has a drawback in that it takes time for the deletion and restoration processes because compression and decompression processes are required at the time of deletion and restoration. In addition, in order to restore deleted images individually, it is necessary to display the deleted images on the monitor, but in this case as well, expansion processing is required, so it takes time to display and the operability is poor. There are drawbacks.

  On the other hand, since the method of Patent Document 2 only moves files, the total number of files does not change, and there is a drawback that it takes time to perform sorting and search processing.

  The present invention has been made in view of such circumstances, and an object of the present invention is to provide an image file management apparatus and a digital camera that can easily confirm a deleted image file, and can easily restore and completely delete the image file. .

  In order to achieve the object, the invention according to claim 1 is a storage means, a display means, an image file display instruction means for instructing display of an image file stored in the storage means, and the image file display. In response to an instruction from the instruction means, at least one of the image file display control means for causing the display means to display an image of the image file stored in the storage means and the image displayed on the display means. Deletion instruction means for selecting and instructing the deletion, a trash file generation means for generating a trash file in which image files of images instructed to be deleted by the deletion instruction means are combined, and the trash file generation means The trash box file generated in step (b) is stored in the storage unit, and the image file of the image instructed to be deleted by the deletion instruction unit is stored in the storage unit. Storage control means for deleting from the means, display setting means for individually setting display ON / OFF for the images of the individual image files stored in the trash box file, and individual settings set by the display setting means Setting information recording means for recording the display setting information of the image file in a predetermined area of the trash box file, and a trash box for instructing the expanded display of the stored image file with respect to the trash box file stored in the storage means In response to an instruction from the file expansion display instruction means and the trash box file expansion display instruction means, a trash box file expansion display control means for causing the display means to display an image of an image file stored in the trash box file, Based on the display setting information, only the image of the image file whose display setting is ON is displayed on the display means. Further comprising a, a trash file expansion display control means for providing an image file management apparatus according to claim.

  According to the first aspect of the present invention, the deleted image file is stored in one file (trash box file). The image file stored in the trash can file can be displayed on the display means as required, and the display / non-display of the image file can be set individually (individually set ON / OFF of display) Can do that.) As a result, the contents of the trash can file can be easily confirmed, and the necessary / unnecessary arrangement of the deleted image file can be easily performed.

  In order to achieve the above object, the invention according to claim 2 is a complete deletion instruction means for instructing deletion of an image file whose display setting is OFF with respect to a trash box file stored in the storage means. In response to the deletion instruction from the complete deletion instruction means, the image file whose display setting is turned off is deleted from the trash box file, and the display setting information of the trash box file after the image file is deleted is updated. The image file management apparatus according to claim 1, further comprising: a trash box file editing unit.

  According to the second aspect of the present invention, when complete deletion is instructed by the complete deletion instructing unit, among the image files stored in the trash can file, the image file whose display setting is OFF is selected from the trash can file. Deleted. Thereby, the file size can be reduced.

  In order to achieve the object, the invention according to claim 3 selects at least one of the image files in the trash box file displayed on the display means, and instructs the restoration instruction means to restore it. The image file instructed to be restored by the restoration instructing means is extracted from the trash can file and restored, and the image file restored by the image file restoring means is deleted from the trash can file. 2. The image file management apparatus according to claim 1, further comprising: a trash box file editing unit that updates display setting information of the trash box file after the file is deleted.

  According to the third aspect of the present invention, it is possible to restore a deleted image file (an image file stored in a trash can file). At this time, in order to confirm the image file to be restored, it is necessary to confirm the contents of the trash can file. However, since only the necessary image file is displayed on the display means, the target image file can be easily found. .

  According to a fourth aspect of the present invention, there is provided a complete deletion instruction means for instructing deletion of an image file whose display setting is turned off with respect to a trash file stored in the storage means in order to achieve the object. Selecting at least one of the image files in the trash box file displayed on the display means and instructing to restore the selected image file; and restoring the image file instructed to be restored by the restoration instruction means to the trash An image file restoring unit that extracts and restores from the file, and deletes the image file whose display setting is turned off from the trash box file in response to a deletion instruction from the complete deletion instruction unit, and the image file restoration unit Delete the image file restored in step 2 from the trash file, and the trash file after the image file is deleted. Providing an image file management apparatus according a trash file editing means for updating indicates setting information, further comprising an in claim 1, wherein.

  According to the fourth aspect of the present invention, when complete deletion is instructed from the complete deletion instructing unit, among the image files stored in the trash can file, the image file whose display setting is OFF is selected from the trash can file. Deleted. Further, when restoration is instructed by the restoration instruction means, the deleted image file (image file stored in the trash box file) can be restored.

  In order to achieve the above object, the invention according to claim 5 includes a trash file display setting means for setting display / non-display of the trash file stored in the storage means, and setting of the trash box file display setting means. Is displayed, the image file display control means causes the display means to display an image of the image file stored in the storage means in response to a display instruction from the image file display instruction means. The image file management apparatus according to claim 1, wherein a predetermined representative image stored in the trash box file is displayed on the display unit.

  According to the fifth aspect of the present invention, the trash can file can be displayed on the display means in the same way as a normal image file, and the display / non-display can be arbitrarily set. Then, when displaying, a predetermined representative image stored in the trash box file is displayed on the display means. By displaying the trash file, the existence of the trash file can be confirmed. Further, by hiding the trash box file, it is possible to prevent the trash box file from being inadvertently deleted, and to improve the viewability of the image.

  In order to achieve the above object, the invention according to claim 6 includes representative image generation means for generating the representative image, and the representative image generation means is configured to store an image of an image file stored in the trash box file in a predetermined manner. The image file management apparatus according to claim 5, wherein an image arranged according to the rule is generated as a representative image.

  According to the invention of claim 6, an image in which the images of the image file stored in the trash can file are arranged according to a predetermined rule is generated as the representative image. As a result, the contents of the trash box file can be confirmed simply by displaying the representative image.

  According to a seventh aspect of the present invention, there is provided a digital camera comprising the image file management apparatus according to any one of the first to sixth aspects, in order to achieve the object.

  According to the seventh aspect of the present invention, it is possible to easily organize images obtained by photographing.

  According to the present invention, a deleted image file can be easily confirmed, and can be easily restored and completely deleted.

  Preferred embodiments of an image file management apparatus and a digital camera according to the present invention will be described below with reference to the accompanying drawings.

<Configuration of digital camera>
1 and 2 are a front perspective view and a rear perspective view, respectively, showing the external configuration of a digital camera to which the present invention is applied.

  As shown in the figure, the digital camera 10 is a so-called compact camera, and its camera body (camera body) 12 is formed in a thin box shape that can be held with one hand.

  As shown in FIG. 1, a photographing lens 14, a flash 16, a speaker 18, an AF auxiliary light lamp 20, and the like are provided on the front surface of the camera body 12, and a shutter button 22, a mode lever 24, a power source are provided on the upper surface. A button 26 and the like are provided.

  On the other hand, as shown in FIG. 2, a monitor 28, a zoom button 30, a play button 32, a delete button 34, a cross button 36, a MENU / OK button 38, a DISP / BACK button 40, and the like are provided on the back of the camera body 12. The external connection terminal 42 is provided on the side surface.

  Although not shown, a tripod screw hole and an openable / closable battery cover are provided on the bottom surface of the camera body 12, and a battery storage chamber and a memory card for storing the battery are provided inside the battery cover. Is provided with a memory card slot.

  The photographic lens 14 is constituted by a retractable zoom lens, and is extended from the camera body 12 when the digital camera 10 is turned on. Since the zoom mechanism and the retracting mechanism of the photographic lens 14 are well-known techniques, a description of their specific configuration is omitted here.

  The flash 16 is composed of a xenon tube, and emits light as necessary when photographing a dark subject or in backlight.

  The AF auxiliary light lamp 20 is composed of, for example, a high-intensity LED, and emits light as necessary during AF.

  The shutter button 22 is constituted by a two-stage stroke type push switch capable of so-called “half press” and “full press”. When the shutter release button 22 is half-pressed, the digital camera 10 performs shooting preparation processing, that is, each of AE (Automatic Exposure), AF (Auto Focus), and AWB (Automatic White Balance). When the image is processed and fully pressed, the image is captured and recorded.

  The mode lever 24 is used for setting the shooting mode. The mode lever 24 is provided so as to be rotatable around the shutter button 22 and can be set at the “SP position”, “AUTO position”, “M position”, and “moving picture position”. The digital camera 10 is set to the “scene program shooting mode” by setting the mode lever 24 to the “SP position”, and is set to a mode for performing exposure control and shooting control according to the shooting scene. Also, by setting the “AUTO position”, the “auto shooting mode” is set, and the mode is set to perform the exposure control fully automatically. Also, by setting the “M position”, the “manual shooting mode” is set, and the exposure setting is manually set. Also, by setting the “moving image position”, the “moving image shooting mode” is set, and the moving image shooting mode is set.

  As the “scene program shooting mode”, for example, a “person shooting mode” for shooting a person, a “landscape shooting mode” for shooting a landscape, a “sport shooting mode” for shooting a sport, or a “night scene shooting” for shooting a night scene. "Mode", "Underwater shooting mode" for underwater shooting, etc. are prepared and can be set on the menu screen.

  The power button 26 is used to turn on / off the power of the digital camera 10 and is turned on / off when pressed for a predetermined time (for example, 2 seconds).

  The monitor 28 is composed of a color LCD. The monitor 28 is used for reproducing and displaying captured images, and is used as a GUI during various settings. At the time of shooting, an image captured by the image sensor is displayed through and used as an electronic viewfinder.

  The zoom button 30 is used to instruct the zoom of the photographing lens 14 and the reproduced image, and includes a zoom tele button for instructing zooming to the telephoto side and the enlargement side, and a zoom wide button for instructing zooming to the wide angle side and the reduction side. It is configured.

  The playback button 32 is used for an instruction to switch to the playback mode. That is, the digital camera 10 is switched to the playback mode when the playback button 32 is pressed during shooting. When the playback button 32 is pressed while the power is off, the digital camera 10 is activated in the playback mode.

  The delete button 34 is used for an instruction to delete an image being reproduced. That is, when the delete button 34 is pressed during image reproduction, an instruction to delete the image reproduced and displayed on the monitor 28 is issued. When the delete button 34 is pressed, a message confirming execution of the deletion is displayed on the monitor 28. After execution is instructed (pressing the MENU / OK button), the image file of the target image is deleted from the memory card 152. Is done.

  Although this image file is apparently deleted from the memory card 152, it is stored in a predetermined trash box file and restored as necessary. This will be described in detail later.

  The cross button 36 is provided so that it can be pressed in four directions, up, down, left, and right, and a function corresponding to the setting state of the camera is assigned to each direction.

  For example, at the time of shooting, a function for switching the macro function ON / OFF is assigned to the left button, and a function for switching the flash mode is assigned to the right button. In addition, a function for changing the brightness of the monitor 28 is assigned to the upper button, and a function for switching ON / OFF of the self-timer is assigned to the lower button.

  Further, during playback, a frame advance function is assigned to the left button, and a frame return function is assigned to the right button.

  In various settings, a function for moving the cursor displayed on the monitor 28 in the direction of each button is assigned.

  In the digital camera 10 of the present embodiment, the flash mode includes an auto flash mode (the flash is automatically emitted according to the shooting scene) and a forced flash mode (the flash is forcibly emitted). Flash emission mode (flash emission is prohibited), slow sync mode (slow shutter shooting is performed), red-eye reduction flash mode (red-eye reduction processing is performed), double-shoot mode (single recording instruction ( Two images, a flash ON image and a flash OFF image) are prepared by fully pressing the shutter button), and the mode is switched sequentially each time the right button of the cross button 36 is pressed.

  The MENU / OK button 38 is used to call a menu screen (MENU function), and is used to confirm selection contents, execute a process, etc. (OK function), and is assigned according to the setting state of the digital camera 10. Is switched.

  On the menu screen, for example, image size (recording pixel number) setting, sensitivity setting, recording method (compression / RAW image data recording) setting, white balance setting, photometry method setting, AF method setting, Various functions of the digital camera 10 such as a self-timer setting, a digital zoom function setting, a continuous shooting function setting, and a DPOF setting are set.

  The DISP / BACK button 40 is used for a display content switching instruction (DISP function) of the monitor 28 and an instruction for canceling an input operation (BACK function), and is assigned according to the setting state of the digital camera 10. The function is switched.

  The external connection terminal 42 is a communication interface for connecting the camera to an external device such as a personal computer or a printer (for example, USB, IEEE 1394, etc.). The digital camera 10 can be connected to an external device such as a personal computer by connecting a dedicated cable to the external connection terminal 42.

  FIG. 3 is a block diagram showing an electrical configuration of the digital camera 10 of the present embodiment.

  As shown in the figure, the digital camera 10 includes a CPU 110, an operation unit (shutter button 22, mode lever 24, power button 26, zoom button 30, play button 32, delete button 34, cross button 36, MENU / OK button 38. , DISP / BACK button 40, etc.) 112, ROM 116, flash ROM 118, memory (SDRAM) 120, VRAM 122, photographing lens 14, zoom control unit 124, aperture / shutter control unit 126, focus control unit 128, image sensor 134, image sensor Control unit 136, analog signal processing unit 138, A / D converter 140, digital signal processing unit 142, AF detection unit 144, AE / AWB detection unit 146, compression / decompression processing unit 148, media controller 150, memory card (storage medium) 152, display control 154, OSD (On-Screen Display) unit 156, a monitor 28, a flash control unit 158, a flash 16, a communication control unit 160, is configured to include a communication interface 162 or the like.

  The CPU 110 functions as a control unit that performs overall control of the overall operation of the digital camera 10, and controls each unit according to a predetermined control program based on an input from the operation unit 112.

  The ROM 116 connected via the bus 114 stores a control program executed by the CPU 110 and various data necessary for control. The flash ROM 118 stores various setting information related to the operation of the digital camera 10 such as user setting information, an image file, and the like. That is, the flash ROM 118 also functions as an internal memory. When the flash ROM 118 is designated as an image file storage destination, the image file obtained by photographing is stored in the flash ROM 118.

  The memory (SDRAM) 120 is used as a calculation work area for the CPU 110 and is also used as a temporary storage area for image data, and the VRAM 122 is used as a temporary storage area dedicated to image data for display.

  The taking lens 14 includes a zoom lens 14Z, an aperture / shutter unit 14I, a focus lens 14F, and the like.

  The zoom lens 14Z is driven by a zoom lens actuator (not shown) and moves back and forth along the optical axis. As a result, the focal length of the photographic lens 14 varies. The CPU 110 controls the movement of the zoom lens 14Z by controlling the driving of the zoom lens actuator via the zoom control unit 124, and performs zooming.

  The focus lens 14F is driven by a focus lens actuator (not shown) and moves back and forth along the optical axis. Thereby, the imaging position of the photographic lens 14 changes. The CPU 110 controls the movement of the focus lens 14 </ b> F by controlling the drive of the focus lens actuator via the focus control unit 128 and performs focusing.

  The aperture / shutter unit 14I includes an aperture and a mechanical shutter (not shown). The diaphragm operates by being driven by a diaphragm actuator (not shown) built in the diaphragm / shutter unit 14I, and thereby the amount of light incident on the image sensor 134 is adjusted. The CPU 110 controls the operation of the diaphragm by controlling the driving of the diaphragm actuator via the diaphragm / shutter controller 126, and controls the amount of light incident on the image sensor 134 (aperture value). The mechanical shutter operates by being driven by a shutter actuator (not shown) built in the aperture / shutter unit 14I, whereby the image sensor 134 is exposed / light-shielded. The CPU 110 controls the operation of the mechanical shutter by controlling the driving of the shutter actuator via the aperture / shutter controller 126, and controls the exposure / light shielding of the image sensor 134.

  The image sensor 134 is configured by a color CCD or color CMOS sensor having a predetermined color filter array (in this example, a color CCD (for example, Bayer array)). The CPU 110 drives the image sensor 134 via the image sensor control unit 136 and outputs a subject image captured through the photographing lens 14 as an image signal.

  The analog signal processing unit 138 performs correlated double sampling processing and amplifies the image signal output from the image sensor 134.

  The A / D converter 140 converts the analog image signal output from the analog signal processing unit 138 into a digital image signal.

  The digital signal processing unit 142 takes in an image signal output from the A / D converter 140 in accordance with a command from the CPU 110, performs predetermined signal processing, and performs Y / C consisting of a luminance signal Y and color difference signals Cr and Cb. The image signal is generated. Further, in accordance with a command from the CPU 110, various image processing such as color tone correction processing and gradation correction processing is performed on the Y / C image signal.

  The AF detection unit 144 captures R, G, and B color image signals output from the A / D converter 140 and calculates a focus evaluation value necessary for AF control. The AF detection unit 144 includes a high-pass filter that allows only a high-frequency component of the G signal to pass, an absolute value processing unit, a focus area extraction unit that extracts a signal within a predetermined focus area set on the screen, and a focus area An integration unit for integrating the absolute value data is included, and the absolute value data in the focus area integrated by the integration unit is output to the CPU 110 as a focus evaluation value.

  During the AF control, the CPU 110 searches for a position where the focus evaluation value output from the AF detection unit 144 is maximized, and moves the focus lens 14F to that position, thereby performing focusing on the main subject. That is, during the AF control, the CPU 110 first moves the focus lens 14F from the closest distance to infinity, and sequentially acquires the focus evaluation value from the AF detector 144 at regular intervals during the movement process. Then, the position where the focus evaluation value is maximized is detected, the position where the detected focus evaluation value is maximized is determined as the in-focus position, and the focus lens 14F is moved to that position. As a result, the photographing lens 14 is focused on the subject (main subject) located in the focus area.

  If the position at which the focus evaluation value is maximum is not detected (for example, at low contrast), the CPU 110 determines that an AF error has occurred and issues a predetermined warning (for example, displaying an error message on the monitor 28).

  The AE / AWB detection unit 146 takes in the image signals of R, G, and B colors output from the A / D converter 140 and calculates integrated values necessary for AE control and AWB control. That is, the AE / AWB detection unit 146 divides one screen into a plurality of areas (for example, 8 × 8 = 64 areas), and calculates an integrated value of R, G, and B signals for each divided area.

  At the time of AE control, the CPU 110 acquires an integrated value of R, G, B signals for each area calculated by the AE / AWB detection unit 146, obtains the brightness (photometric value) of the subject, and obtains an appropriate exposure amount. Set the exposure to obtain That is, sensitivity, aperture value, shutter speed, and necessity of flash emission are set.

  In addition, the CPU 110 adds the integrated values of R, G, and B signals for each area calculated by the AE / AWB detection unit 146 to the digital signal processing unit 142 during AWB control. The digital signal processing unit 142 calculates a gain value for white balance adjustment based on the obtained integrated value, and detects a light source type.

  The compression / decompression processing unit 148 performs compression processing in a predetermined format (for example, JPEG format) on the input image data in accordance with a command from the CPU 110 to generate compressed image data. Further, in accordance with a command from the CPU 110, the input compressed image data is subjected to a decompression process in a predetermined format to generate uncompressed Y / C image data.

  Note that the photographed image can also be recorded as RAW image data. In this case, the compression processing is not performed, and the image data after A / D conversion is recorded in the memory card 152 as it is in a predetermined file format.

  The media controller 150 controls reading / writing of data with respect to the memory card 152 in accordance with a command from the CPU 110. The memory card 152 is detachably loaded into the media slot provided in the camera body as described above.

  The display control unit 154 controls display on the monitor 28 in accordance with a command from the CPU 110. That is, in accordance with a command from the CPU 110, the input image signal is converted into a signal format for display on the monitor 28 and output to the monitor 28. Further, in accordance with a command from the CPU 110, an OSD signal such as a character, a figure, or a symbol added from the OSD unit 156 is mixed with an image signal and output to the monitor 28.

  The OSD unit 156 includes a character generator, and displays characters (warning messages, shooting information (aperture, sensitivity, shutter speed, etc.), shooting date / time, number of shots, file name, etc.) displayed on the monitor 28 in accordance with a command from the CPU 110. A signal (OSD signal) such as a figure (face detection frame, auxiliary shooting line), a symbol (focus frame, remaining battery level mark, etc.) is generated. The OSD signal generated by the OSD unit 156 is output to the display control unit 154, mixed with the image signal, and output to the liquid crystal monitor 28. As a result, character information and the like are superimposed on the captured image and the reproduced image.

  The flash control unit 158 controls light emission of the flash 16 in accordance with a command from the CPU 110.

  The communication control unit 160 controls communication with an external device connected via the communication interface 162 in accordance with a command from the CPU 110. Note that when the digital camera 10 is connected to a personal computer via the communication interface 162, the digital camera 10 is recognized as a storage device, and data stored in the memory card 152 can be transmitted and received.

  Next, the processing operation by the digital camera 10 of the present embodiment configured as described above will be described.

  First, basic photographing and reproduction processing operations will be described.

  Shooting is performed by setting the mode of the digital camera 10 to the shooting mode. The shooting mode is set by pressing the power button 26 while the power is off, or by pressing the shutter button 22 when the playback mode is set.

  When the mode of the digital camera 10 is set to the shooting mode, first, an image captured by the image sensor 134 is displayed through on the monitor 28. That is, images are continuously picked up by the image pickup device 134, and the images are continuously processed to generate image data for through images. The generated image data is sequentially added to the display control unit 154 via the VRAM 122, converted into a display signal format, and output to the monitor 28. As a result, the image captured by the image sensor 134 is displayed through on the monitor 28. The photographer determines the composition by looking at the through image displayed on the monitor 28 and presses the shutter button 22 halfway.

  When the shutter button 22 is half-pressed, an S1 ON signal is input to the CPU 110. In response to the input of the S1 ON signal, the CPU 110 executes shooting preparation processing, that is, AE, AF, and AWB processing.

  First, the image signal output from the image sensor 134 is added to the AE / AWB detection unit 146 and the AF detection unit 144 via the analog signal processing unit 138 and the A / D converter 140.

  The AE / AWB detection unit 146 calculates an integrated value necessary for AE control and AWB control from the input image signal, and outputs the integrated value to the CPU 110. The CPU 110 calculates subject brightness based on the integrated value obtained from the AE / AWB detection unit 146, and determines sensitivity, aperture value, shutter speed, and the like for obtaining proper exposure. The integrated value obtained from the AE / AWB detection unit 146 is added to the digital signal processing unit 142 for white balance correction.

  In addition, the AF detection unit 144 calculates an integrated value necessary for AF control from the input image signal and outputs it to the CPU 110. The CPU 110 controls the movement of the focus lens 14F via the focus control unit 128 based on the output from the AF detection unit 144, and focuses the photographing lens 14 on the main subject.

  The photographer looks at the through image displayed on the monitor 28, confirms the focus state and the like, and instructs the execution of photographing. That is, the shutter button 22 is fully pressed.

  When the shutter button 22 is fully pressed, an S2 ON signal is input to the CPU 110. In response to the S2 ON signal, the CPU 110 executes the main photographing process.

  First, the image sensor 134 is exposed with the sensitivity, aperture value, and shutter speed obtained as a result of the AE control, and a recording image is captured.

  The recording image signal output from the image sensor 134 is added to the digital signal processing unit 142 via the analog signal processing unit 138 and the A / D converter 140. The digital signal processing unit 142 performs predetermined signal processing on the input image signal to generate image data (Y / C data) composed of luminance data Y and color difference data Cr and Cb.

  The generated image data is added to the compression / decompression processing unit 148, subjected to predetermined compression processing, and then stored in the memory 120. The CPU 110 adds predetermined information regarding photographing to the compressed image data stored in the memory 120, and forms an image file of a predetermined format (Exif in the digital camera of the present embodiment) via the media controller 150 as a memory card 152. To record.

  As shown in FIG. 4, an Exif-standard image file is configured such that image auxiliary information can be recorded in a tag format in the header portion of the file. The auxiliary information tag includes information about the version and characteristics of image data. The shooting data related to the shot image such as the information related to the structure, the information related to the structure, the user information, the related file information, the information related to the date and time, the information related to the shooting condition, and the information related to the pointer to the IFD can be recorded in the tag format.

  Also, tags relating to shooting conditions include exposure time and F number at the time of shooting, exposure program, spectral sensitivity, ISO speed rate, photoelectric conversion function, shutter speed, aperture value, brightness value, exposure correction value, lens minimum F value, subject Distance, metering method, light source, flash, lens focal length, flash intensity, spatial frequency response, focal plane width resolution, focal plane height resolution, focal plane resolution unit, subject position, exposure index, sensor method, file The source, scene type, CFA pattern, etc. can be recorded.

  In addition, a maker note and a user comment can be recorded in a tag relating to user information, and various information unique to the camera and the user can be recorded in the maker note and the user comment.

  Further, an Exif standard image file can record a thumbnail image (a reduced image of the main image) in the header portion of the file. By using this thumbnail image, high-speed display on a monitor is possible. ing.

  Furthermore, an Exif standard image file has an SOI marker (Start Of Image) recorded at the top of the data and an EOI marker (End Of Image) recorded at the end so that the beginning and end of the file can be recognized. ing.

  The captured image data is recorded on the memory card 152 as an image file (Exif file) with the attached information.

  When RAW image data recording is selected as the recording format, the image data (RAW image data) after A / D conversion is recorded in the memory card 152 as an image file (RAW image file) in a predetermined format. . This RAW image file is also recorded by adding predetermined information related to photographing to the header portion in a tag format.

  The image file is recorded on the memory card 152 in accordance with a predetermined camera file system standard (in this example, the DCF standard (Design rule for Camera File system standard)).

  The image recorded on the memory card 152 as described above is reproduced and displayed on the monitor 28 by setting the mode of the digital camera 10 to the reproduction mode. That is, when the playback button 32 is pressed and the mode of the digital camera 10 is set to the playback mode, the CPU 110 stores the compressed image data of the image file last recorded on the memory card 152 via the media controller 150. read out.

  The compressed image data read from the memory card 152 is added to the compression / decompression processing unit 148, converted into non-compressed image data, and then added to the VRAM 122. Then, the data is output from the VRAM 122 to the monitor 28 via the display control unit 154. As a result, the image recorded on the memory card 152 is reproduced and displayed on the monitor 28.

  The frame advance of the image is performed by the right key and the left key of the cross button 36. When the right key is pressed, the next image is read from the memory card 152 and reproduced and displayed on the monitor 28. When the left key is pressed, the previous image is read from the memory card 152 and reproduced and displayed on the monitor 28.

  In the case of a RAW image file, the digital signal processing unit 142 performs predetermined signal processing and reproduces and displays it on the monitor 28.

  As described above, the digital camera 10 according to the present embodiment records an image by setting the camera mode to the shooting mode and pressing the shutter button 22 fully. The recorded image is reproduced and displayed on the monitor 28 by setting the camera mode to the reproduction mode.

<Image file deletion process>
As described above, all the captured images are recorded on the memory card 152. However, as the number of recorded images increases, the viewability decreases and the desired image cannot be found immediately.

  Therefore, it is necessary to delete unnecessary images as necessary and organize the images recorded on the memory card 152.

  The image is deleted by displaying the image of the image file to be deleted on the monitor 28 and pressing the delete button 34 in the playback mode.

  When the CPU 110 detects that the delete button 34 has been pressed during image reproduction, the CPU 110 displays a message (for example, “Do you want to delete? OK / CANCEL”) to confirm execution of the deletion on the monitor 28.

  The user confirms this message and presses the MENU / OK button 38 to execute deletion, and presses the DISP / BACK button 40 to cancel the instruction.

  CPU 110 executes subsequent processing in response to an input from the operation unit. That is, when the DISP / BACK button 40 is pressed, the normal playback state is restored, and when the MENU / OK button 38 is pressed, the image file to be deleted is deleted from the memory card 152.

  Here, the image file to be deleted is deleted from the memory card 152 and simultaneously stored in a predetermined trash box file. That is, it is apparently deleted from the memory card 152 but stored in a predetermined trash box file. Therefore, it can be restored as necessary.

  As shown in FIG. 5, the trash file is a file (so-called multi-page file) that stores the deleted image files together, and all the deleted image files are stored in the trash file. The

  FIG. 5 shows the case where five image files [DSCF0001], [DSCF0002], [DSCF0003], [DSCF0004], and [DSCF0005] are recorded in the memory card 152, [DSCF0001] and [DSCF0002]. , [DSCF0004] shows a state when the three image files are deleted. In this case, three image files [DSCF0001], [DSCF0002], and [DSCF0004] are stored in one trash box file ([TRSH0001]). Then, the trash box file and the image files [DSCF0003] and [DSCF0005] remain in the memory card 152.

  FIG. 6 is a schematic diagram showing the data structure of a trash can file. As shown in the figure, the trash box file has a representative image area D1 and a deleted image area D2.

  The deleted image area D2 is an area for storing a deleted image file. The deleted image files are stored in the deleted image area D2 in the order of deletion while maintaining the data structure (Exif standard). At this time, in each image file, an SOI marker is recorded at the leading end of the data and an EOI marker is recorded at the end. Thereby, the start and end of each image file can be recognized.

  The representative image area D1 is an area for selecting one of the deleted image files stored in the deleted image area D2 and storing the image of the image file as a representative image. In this example, the image of the image file deleted first is stored as a representative image.

  The representative image area D1 is configured according to the Exif standard. Accordingly, even if the device cannot recognize the trash box file, at least the image (representative image) stored in the representative image area D1 can be displayed as long as the device can recognize the Exif file.

  In the Exif IFD area of the IFD0 area (0th IFD) provided in the header portion of the representative image area D1, deleted image area presence / absence information indicating whether this file (trash can file) includes the deleted image area D2; When the deleted image area D2 is included, information (pointer) indicating the storage location of the deleted image index information is stored. Therefore, a device that can recognize a trash can file can determine whether it is a trash can file by reading this IFD0 area (0th IFD).

  Also, in this IFD0 area (0th IFD), deleted image identification IFD (1),..., IFD (n) indicating the storage location of the deleted image file in this file (SOI marker address of each image file) is stored. The Therefore, a device capable of recognizing the trash can file can recognize the storage position of each image file by reading this IFD0 area (0th IFD).

  On the other hand, the thumbnail image of the deleted image file is stored in the IFD1 area (1st IFD). Therefore, when displaying a list of each image file stored in the trash can file on a monitor capable of recognizing the trash can file, the thumbnail image stored in this IFD1 area (1st IFD) is used to monitor the image file. Can be displayed.

  In the other area of the header, the stored image information is recorded as it is. Therefore, in this example, the image information of the image file deleted first is recorded as it is, and the thumbnail of the image file deleted first is also recorded as the thumbnail image.

  In addition, as described above, the representative image area D1 is configured according to the Exif standard, so even if the device cannot recognize the trash can file, the information on the representative image area D1 is read to display an image on the monitor. Can be displayed. In this case, the image (representative image) stored in the representative image area D1 is displayed (in the case of this example, the image of the image file deleted first is displayed).

  In this example, the information of the deleted image file is recorded in the IFD0 area (0th IFD) of the representative image area D1, but in addition to this, the information of the deleted image file (internal information of the trash can file) (Number of files, date and time of deletion, image information, etc.)) may be recorded. In other words, any configuration may be used as long as at least the number of stored image files and the area (start address and end address) can be read from the information recorded in the header in a configuration according to the Exif file.

  Also, the trash box file is recorded in the same directory (folder) as the deleted image file.

  Here, as described above, in the digital camera 10 of the present embodiment, the image file is stored in the memory card 152 in accordance with the DCF standard.

  As shown in FIG. 7, in the DCF standard, a DCF image directory (“DCIM”) is generated directly under the root directory, and DCF directories (“100_FUJI”, “101_FUJI” are created in a lower layer of the DCF image directory (“DCIM”). ", ...) is generated. An image file of an image obtained by shooting is stored in this DCF directory (“100_FUJI”, “101_FUJI”,...).

  Therefore, the trash box file is generated in units of DCF directories (DCF folders) and stored in the DCF directory.

  The directory name of the DCF directory is composed of a directory number as the first three characters and a free character as the five characters following the directory number (in this example, the free character is composed of “_FUJI”).

  In the file name, the first 4 characters are composed of free characters, and the 4 characters following the free characters are composed of file numbers (in this example, the free characters are composed of “DSCF”. The characters are composed of “TRSH”).

  FIG. 8 is a flowchart showing the procedure of the trash file generation process.

  As described above, the image file is deleted by displaying the image of the image file to be deleted on the monitor 28 and pressing the delete button 34 in the playback mode.

  First, the user sets the camera mode to the playback mode, and displays the image of the image file to be deleted on the monitor 28 (step S10).

  Based on the input from the operation unit 112, the CPU 110 determines whether or not the delete button 34 has been pressed, that is, whether or not deletion has been instructed (step S11).

  If it is determined that the deletion has been instructed, the CPU 110 displays a deletion confirmation message (for example, “Do you want to delete this image?”) On the monitor 28 (step S12). The user confirms this message and presses the MENU / OK button 38 to execute deletion, and presses the DISP / BACK button 40 to cancel the instruction. CPU110 determines whether execution of deletion was instruct | indicated based on the input from an operation part (step S13). When deletion is instructed, the CPU 110 determines whether a trash box file exists in the folder (directory) in which the image file to be deleted is stored (step S14).

  If it is determined that there is no trash can file in the folder in which the image file to be deleted is stored, the CPU 110 creates a new trash can file (step S15). As described above, the trash box file is generated by storing the image first instructed to be deleted as a representative image in the representative image area D1 and recording necessary information in the header portion thereof. CPU 110 adds the image file of the image instructed to be deleted to the newly created trash can file (step S16). As a result, a trash box file storing the image file of the image instructed to be deleted is generated.

  On the other hand, if it is determined in step S14 that the trash box file already exists, the CPU 110 adds the image file of the image instructed to be deleted to the existing trash box file (step S16). As a result, a trash box file in which the image file of the image instructed to be deleted is additionally stored is generated.

  As described above, when the CPU 110 receives an instruction to execute deletion, the CPU 110 stores the image file of the image instructed to be deleted in the trash box file. After performing the storage process in the trash file, the CPU 110 deletes the image file of the image instructed to be deleted from the memory card 152 (step S17).

  Thereafter, the CPU 110 determines whether or not the end of the playback mode is instructed based on the input from the operation unit 112 (step S18), and ends the process when the end of the playback mode is instructed.

  When the image file is deleted, the image of the next image file (file number is the image of the next image file) is reproduced and displayed on the monitor 28.

  As described above, in the digital camera according to the present embodiment, when an image deletion is instructed, the image file of the image instructed to be deleted is stored in the trash box file and then deleted from the memory card 152. The trash can file is composed of one file, and the deleted image file is sequentially added and generated. By storing the image file instructed to be deleted as one file in this way, it is possible to improve the management and viewability of the image file.

  In this example, after deletion is instructed, a process for confirming the execution of deletion is performed once (steps S12 and S13). However, the confirmation may be performed without performing the confirmation process. .

  Further, in this example, all the image files instructed to be deleted are stored in one trash can file, but an upper limit is set for the number of image files that can be stored in one trash can file. Alternatively, a new trash can file may be generated. In this case, the upper limit value may be set by the user, or may be a fixed value.

  In this example, a trash box file is generated for each DCF directory (the trash box file is stored in the same directory as the deleted image file), but storage of the trash box file is not limited to this. Separately, a directory for storing only the trash box file may be generated (for example, generated immediately below the DCF image root directory), and the trash box file may be stored in the directory. In this case, a trash can file may be generated for each directory, or a common trash can file may be generated regardless of the directory from which the image file is stored. Further, instead of being stored in the memory card 152, it may be stored in an internal memory such as the flash ROM 118.

<Display settings for image files stored in Trash file>
As described above, in the digital camera of the present embodiment, the deleted image file is stored in one trash can file.

  The image file stored in the trash box file can be restored as necessary. As will be described later, this restoration operation is performed by displaying the image of the image file stored in the trash box file on the monitor 28 and giving a restoration instruction to the target image.

  By the way, among the image files stored in the trash box file, there are some which need to be secured, and some which are not necessary at all.

  Therefore, it is preferable not to display unnecessary image files when browsing the contents.

  In the digital camera according to the present embodiment, display / non-display setting (display ON / OFF setting) of the image file stored in the trash can file can be individually performed.

  Hereinafter, the display setting (display ON / OFF setting) processing of the image file stored in the trash box file will be described.

  FIG. 9 is a flowchart illustrating a processing procedure for display setting of the image file stored in the trash box file.

  The display setting of each image file stored in the trash box file is performed by calling a display setting function (specifically, a program for performing display setting processing) prepared in advance. This display setting function is called on the menu screen. That is, as one of the menu items, an item “display setting of the contents of the trash box file” is prepared in advance, and when this item is selected on the menu screen, a predetermined display setting function is called.

  Therefore, when performing this process, first, the user performs a process of calling a display setting function on the menu screen (step S20).

  When the display setting function is called, the CPU 110 executes display setting processing according to a predetermined control program.

  First, the CPU 110 causes the user to select a directory (folder) (step S21). That is, a directory in which an image file for display setting is stored is selected. This selection process is performed, for example, by displaying a list of DCF directories generated in the DCF image root directory of the memory card 152 and selecting one of them.

  When a directory is selected, the CPU 110 accesses the memory card 152 and determines whether or not a trash box file exists in the directory (step S22). If it is determined that there is no trash box file in the selected directory, the CPU 110 displays a predetermined error message (for example, “no image that can be restored”) on the monitor 28 (step S38).

  On the other hand, if a trash box file exists in the selected directory, the CPU 110 performs an analysis process on the trash box file (step S23). That is, a process for confirming the total number of image files stored in the trash box file is performed. Based on the analysis result, the total number of image files stored in the trash can file is set in the parameter N (step S24). Further, 1 is set to the parameter n (step S25).

  Thereafter, the CPU 110 displays the image of the nth frame image file stored in the trash box file on the monitor 28 (step S26).

  Here, since n is set to 1, the image of the first frame image file is displayed on the monitor 28.

  FIG. 10 is a diagram illustrating a display example of the monitor 28. As shown in the figure, the image of the read image file (the nth frame image) is displayed on the monitor 28 at the center of the screen. Then, icons of functions assigned to the cross button 36 are displayed on the top, bottom, left, and right of the image.

  Here, in the digital camera 10 of the present embodiment, in the display setting mode, the right button of the cross button 36 is frame-advanced, the left button is frame-returned, the upper button is set to display ON, and the lower button is set to display OFF. Function is assigned. Accordingly, a frame advance icon is displayed on the right side of the image, a frame return icon is displayed on the left side, an ON setting (display) icon is displayed on the upper side, and an OFF setting (non-display) icon is displayed on the lower side.

  The CPU 110 displays the image of the read image file on the monitor 28 and displays these icon images.

  The icon in the upper left corner of the screen is an icon indicating the current mode, and indicates that the current mode is a display setting mode.

  The display in the upper right corner of the screen shows the current frame number (the serial number assigned to the displayed image), the numerator is the current frame number, and the denominator is the total number of image files stored in the trash file. (Frame number / total number).

  The display at the lower right corner of the screen indicates the current display setting of the image being displayed, and is displayed as ON or OFF. In the initial setting, all are set to ON. Therefore, when the display setting process is not performed, all the image files stored in the trash box file are displayed at the time of development display.

  The user performs necessary operations based on the display on the monitor 28. That is, when the display setting of the image currently displayed on the monitor 28 is set to ON, the lower button of the cross button 36 is pressed to switch the display setting to OFF. On the other hand, when the display setting of the image currently displayed on the monitor 28 is set to OFF, the upper button of the cross button 36 is pressed to switch the display setting to ON. Further, when the next image is confirmed without switching the current display setting, the right button of the cross button 36 is pressed, and when the previous image is confirmed, the left button of the cross button 36 is pressed. Further, when the display setting function is terminated, the DISP / BACK button 40 is pressed.

  The CPU 110 determines whether or not there is a key input based on the input from the operation unit 112 (step S27), and executes a process corresponding to the input key operation.

When the upper button of the cross button 36 is pressed As described above, when the upper button of the cross button 36 is pressed, the display setting of the currently displayed image is set to ON.

  When the upper button of the cross button 36 is pressed, the display setting of the currently displayed image is set to ON (display flag: 1 (valid flag)), and the information is recorded in a predetermined area of the trash box file (step S28). ). As the storage area, for example, it is recorded in a maker note provided in the header portion of the representative image area D1. Alternatively, it is recorded in a maker note provided in the header portion of the image file.

  Thereafter, the CPU 110 adds 1 to the parameter n (step S29). Then, it is determined whether or not the parameter n after adding 1 exceeds the parameter N (total number in the trash box file) (step S34). That is, it is determined whether the image file is the last frame.

  If it is determined that the parameter n does not exceed the parameter N, the process returns to step S26 and the next frame is displayed on the monitor 28.

 On the other hand, when determining that the parameter n exceeds the parameter N, the CPU 110 sets 1 to the parameter n and returns to the process of step S26. That is, the first frame is displayed on the monitor 28.

  As described above, when the upper button of the cross button 36 is pressed, the display setting of the currently displayed image is set to ON and the frame is advanced.

When the lower button of the cross button 36 is pressed As described above, when the lower button of the cross button 36 is pressed, the display setting of the currently displayed image is set to OFF.

  When the lower button of the cross button 36 is pressed, the display setting of the currently displayed image is set to OFF (display flag: 0 (invalid flag)), and the information is recorded in a predetermined area of the trash box file (step S30). ).

  Thereafter, the CPU 110 adds 1 to the parameter n (step S31). Then, it is determined whether or not the parameter n after adding 1 exceeds the parameter N (step S34).

  If it is determined that the parameter n does not exceed the parameter N, the process returns to step S26 and the next frame is displayed on the monitor 28. On the other hand, when determining that the parameter n exceeds the parameter N, the CPU 110 sets 1 to the parameter n and returns to the process of step S26. That is, the first frame is displayed on the monitor 28.

  As described above, when the lower button of the cross button 36 is pressed, the display setting of the currently displayed image is set to OFF and the frame is advanced.

When the right button of the cross button 36 is pressed As described above, when the right button of the cross button 36 is pressed, the frame is advanced.

  When the right button of the cross button 36 is pressed, the CPU 110 adds 1 to the parameter n (step S32). Then, it is determined whether or not the parameter n after adding 1 exceeds the parameter N (step S34).

  If it is determined that the parameter n does not exceed the parameter N, the process returns to step S26 and the next frame is displayed on the monitor 28. On the other hand, when determining that the parameter n exceeds the parameter N, the CPU 110 sets 1 to the parameter n and returns to the process of step S26. That is, the first frame is displayed on the monitor 28.

When the left button of the cross button 36 is pressed As described above, when the left button of the cross button 36 is pressed, the frame is returned.

  When the left button of the cross button 36 is pressed, the CPU 110 divides 1 from the parameter n (step S33). Then, it is determined whether or not the parameter n after division by 1 is 0 (step S36).

  If it is determined that the parameter n is not 0, the process returns to step S26, and the previous frame is displayed on the monitor 28. On the other hand, when determining that the parameter n is 0, the CPU 110 sets N to the parameter n and returns to the process of step S26. That is, the last frame image is displayed on the monitor 28.

When DISP / BACK Button 40 is Pressed As described above, when the DISP / BACK button 40 is pressed, the CPU 110 ends the display setting function. In this case, the previous mode is restored. That is, when the immediately preceding mode is the shooting mode, the mode returns to the shooting mode, and when the mode is the playback mode, the mode returns to the playback mode.

  In the above example, the image files stored in the trash box file are displayed on the monitor 28 frame by frame, but a plurality of frames may be displayed together. For example, a display area of 2 × 2 frames may be provided in the display area of the monitor 28, and an image for 4 frames may be displayed collectively, or a display area of 3 × 3 frames may be provided to provide an image for 9 frames. May be displayed together. Moreover, you may enable it for a user to select these display forms.

  When displaying images of a plurality of frames in this way, for example, a specific image can be selected by a selection unit such as a cursor or a selection frame, and display settings are set for the image selected by the selection unit. It can be so.

  In the above example, each time the display setting is switched, the information is sequentially recorded in the trash box file (display setting information is updated). However, the set information is collectively stored in the memory 120 or the like. In addition, it may be recorded in a trash box file at the end of processing (may be updated in a batch at the end).

<Display method of image file stored in trash file>
Next, a method for displaying the image file stored in the trash box file will be described.

  As described above, the display of the image file stored in the trash box file is performed based on the display setting. That is, only an image whose display setting is ON is displayed.

  FIG. 11 is a flowchart showing the procedure for displaying the image file stored in the trash box file.

  The display of the image file stored in the trash box file is performed by giving an instruction to expand and display the trash box file.

  As described above, since the representative image area D1 of the trash can file is generated according to the Exif format, when the mode of the digital camera 10 is set to the reproduction mode, the image stored in the representative image area D1 (representative Image) is displayed on the monitor. That is, when the frame is forwarded or backed in the playback mode and the trash box file is displayed, the image stored in the representative image area D1 of the trash box file is displayed on the monitor 28.

  In a state where the representative image of the trash box file is displayed on the monitor, the user gives an instruction to display the image to the digital camera 10 and instructs the display of the image stored in the trash box file (for example, MENU / The user presses the OK button 38 to instruct development display).

  Note that this expansion display instruction method is an example, and other methods may be used to instruct expansion display of the trash box file. For example, an item for instructing to expand and display a trash can file can be prepared in one of the menu items, and an instruction to expand and display the trash can file can be instructed on the menu screen.

  When an instruction to expand and display a trash box file is input (step S40), the CPU 110 accesses the designated trash box file and performs an analysis process on the trash box file (step S41). Based on the analysis result, the total number of image files stored in the trash box file is set in the parameter M (step S42). Further, 1 is set to the parameter m (step S43).

  Thereafter, the CPU 110 confirms the display setting of the image file of the m-th frame and determines whether or not the display setting is turned on (step S44).

  As a result of this determination, if it is determined that the display setting for the m-th frame image file is ON, the CPU 110 displays the image of the m-th frame image file on the monitor 28 (step S45).

  FIG. 12 is a diagram illustrating a display example of the monitor 28. As shown in the figure, the image of the read image file (m-th frame image) is displayed on the monitor 28 at the center of the screen. Then, icons of functions assigned to the cross button 36 are displayed on the left and right of the image. In this example, a frame advance icon is displayed on the right side of the image, and a frame return icon is displayed on the left side.

  The CPU 110 displays the image of the read image file on the monitor 28 and displays these icon images.

  The icon in the upper left corner of the screen is an icon indicating the current mode, and indicates that the current mode is an expanded display mode.

  The display in the upper right corner of the screen shows the current frame number (serial number assigned to the displayed image). The total number of image files in which the numerator is the current frame number and the denominator is displayed (display setting is ON). The total number of image files that have been selected.

  On the other hand, if it is determined in step S44 that the display setting of the image file of the m-th frame is turned off, the CPU 110 adds 1 to the parameter m (step S53), and the parameter m after the addition is the parameter M. It is determined whether or not (the total number in the trash box file) is exceeded (step S54). That is, it is determined whether the image file is the last frame.

  If it is determined that the parameter m does not exceed the parameter M, the process returns to step S44 and the display setting of the next frame is confirmed.

  On the other hand, when determining that the parameter m exceeds the parameter M, the CPU 110 sets 1 to the parameter m and returns to the process of step S44. That is, the display setting of the first frame is confirmed.

  As described above, the image file whose display setting is turned off is skipped, and the frame is automatically advanced to the image file whose display setting is turned on. As a result, only the image of the image file whose display setting is ON is displayed on the monitor 28.

  On the other hand, the user checks the image displayed on the monitor 28 and presses the right button of the cross button 36 when viewing the next image, and presses the left button of the cross button 36 when viewing the previous image. Press. When the expanded display of the trash box file is to be ended, the DISP / BACK button 40 is pressed.

  CPU110 determines the presence or absence of key input (step S46), and performs the process according to the input operation information.

When the right button of the cross button 36 is pressed As described above, when the right button of the cross button 36 is pressed, the frame is advanced.

  When the right button of the cross button 36 is pressed, the CPU 110 adds 1 to the parameter m (step S47). Then, it is determined whether or not the parameter m after adding 1 exceeds the parameter M (step S48).

  If it is determined that the parameter m does not exceed the parameter M, the process returns to step S44 to confirm the display setting of the next frame. On the other hand, when determining that the parameter m exceeds the parameter M, the CPU 110 sets 1 to the parameter m and returns to the process of step S44. That is, the display setting of the first frame is confirmed.

When the left button of the cross button 36 is pressed As described above, when the left button of the cross button 36 is pressed, the frame is returned.

  When the left button of the cross button 36 is pressed, the CPU 110 divides 1 from the parameter m (step S50). Then, it is determined whether or not the parameter m after division by 1 is 0 (step S51).

  If it is determined that the parameter m is not 0, the process returns to step S44 and the display setting of the previous frame is confirmed. On the other hand, when determining that the parameter m is 0, the CPU 110 sets M to the parameter m and returns to the process of step S44. That is, the display setting of the last frame is confirmed.

When the DISP / BACK button 40 is pressed As described above, when the DISP / BACK button 40 is pressed, the CPU 110 ends the expanded display process. In this case, the next image file of the trash box file is reproduced and displayed on the monitor 28 (when the expansion display of the trash box file is instructed on the menu screen, the previous mode is restored).

  As described above, in the digital camera according to the present embodiment, when confirming the image in the trash can file, only the necessary image can be displayed, so that the target image can be easily found, and management viewability is improved. Can be improved.

  Moreover, since only display / non-display settings are performed, it can be restored whenever necessary.

  In addition, since only display / non-display settings are performed, no burden is imposed on processing, and even a device with low processing capacity can perform display processing operation lightly without generating a waiting time or the like.

  In the above example, the image files stored in the trash box file are displayed on the monitor 28 frame by frame, but a plurality of frames may be displayed together.

<Restoring image file in trash file>
As described above, in the digital camera of the present embodiment, an image in the trash can file can be arbitrarily expanded and displayed. Therefore, it is preferable that an instruction to restore the image file can be given during the expanded display. Similarly, it is preferable that the display setting (display OFF setting) of the image file can be performed during the expanded display.

  Hereinafter, a process in the case where an image file restoration instruction and display setting are performed during the expansion display of an image in the trash can file will be described.

  The instruction to restore the image file and display settings during the display of the expanded display of the trash can file are performed by performing a predetermined key operation when the image to be restored or the image for which the display setting is turned off is displayed on the monitor 28. Is done.

  In this example, when the upper button of the cross button 36 is pressed while the target image is displayed, a restoration instruction is input, and when the lower button is pressed, the display setting is turned off.

  FIG. 13 is a flowchart illustrating a processing procedure when image file restoration processing and display setting are performed during display of a trash box file expanded.

  Note that only the image for which the display setting is ON during the expanded display is displayed, which is the same as the procedure of the process during the expanded display described above.

  Therefore, only the image file restoration processing and display setting processing will be described here.

  As described above, in this example, when the upper button of the cross button 36 is pressed during image display, a restoration instruction is input, and when the lower button is pressed, the display setting is set to OFF (right button If frame is pressed, frame advance is performed, and if the left button is pressed, frame reverse is performed).

  FIG. 14 is a diagram illustrating a display example of the monitor 28. As shown in the figure, the image of the read image file (m-th frame image) is displayed on the monitor 28 at the center of the screen. Then, icons of functions assigned to the cross button 36 are displayed on the top, bottom, left, and right of the image. In this example, a frame advance icon is displayed on the right side of the image, a frame return icon is displayed on the left side, a restore icon is displayed on the upper side, and an OFF setting icon is displayed on the lower side.

  The CPU 110 displays the image of the read image file on the monitor 28 and displays these icon images.

  The user performs necessary operations based on the display on the monitor 28. That is, when the image currently displayed on the monitor 28 is restored, the upper button of the cross button 36 is pressed. On the other hand, when the display setting of the image currently displayed on the monitor 28 is turned off (when not displayed), the lower button of the cross button 36 is pressed. Also, when confirming the next image, the right button of the cross button 36 is pressed, and when confirming the previous image, the left button of the cross button 36 is pressed. Further, when the expansion display of the trash box file is finished, the DISP / BACK button 40 is pressed.

  The CPU 110 determines whether or not there is a key input based on the input from the operation unit 112 (step S45), and executes a process according to the input key operation.

  Note that the processing contents when the right button, the left button, and the DISP / BACK button 40 are pressed are the same as those in the above-described expanded display, and therefore, the processing when the upper button or the lower button is pressed will be described here.

When the right button of the cross button 36 is pressed As described above, when the upper button of the cross button 36 is pressed, the restoration processing of the image being displayed is performed (step S60).

  FIG. 15 is a flowchart showing the procedure of the restoration process.

  As shown in the figure, first, the CPU 110 extracts an image file of an image to be restored (currently displayed image) from the trash box file (step S70).

  Next, a new image file is created based on the extracted image file (step S71). That is, necessary information is added (deleted as necessary) as a single Exif file, and a new image file is created. In this example, the deleted image file is stored in the trash box file almost as it is, so that the image file can be restored simply by extracting the trash box file (modifying header tag information as necessary). Can do.

  After restoring the image file, the CPU 110 deletes the storage area of the restored image file from the trash box file (step S72), and updates the basic information (information recorded in the header such as the number of storages) of the file. Then, 1 is subtracted from the parameter M (step S73), and 1 is subtracted from the parameter m (step S74) to return to the original flow.

  Thereafter, the CPU 110 adds 1 to the parameter m (step S61), determines whether the parameter m after adding 1 exceeds the parameter M (step S48), and the parameter m exceeds the parameter M. If it is determined that it is not, the process returns to step S44 and the display setting of the next frame is confirmed. If it is determined that the parameter m exceeds the parameter M, the parameter m is set to 1, and the process returns to step S44 to confirm the display setting of the first frame.

  As described above, when the upper button of the cross button 36 is pressed during display, a restoration process is performed, and the deleted image file is restored.

When the left button of the cross button 36 is pressed As described above, when the lower button of the cross button 36 is pressed, the display setting of the currently displayed image is turned off.

  When the lower button of the cross button 36 is pressed, the CPU 110 sets the display setting to OFF for the currently displayed image and records the information in a predetermined area of the trash box file (step S62).

  Thereafter, the CPU 110 adds 1 to the parameter m (step S63), and determines whether or not the parameter m after adding 1 exceeds the parameter M (step S48). If it is determined that the parameter m does not exceed the parameter M, the process returns to step S44, and the display setting of the next frame is confirmed. If it is determined that the parameter m exceeds the parameter M, the parameter m is set to 1, and the process returns to step S44 to confirm the display setting of the first frame.

  In this way, by performing the image restoration process during the development display of the trash can file, it is possible to easily find the image to be restored, and the convenience is improved.

  In the above example, the restored image file is deleted from the trash box file, but it may be left without being deleted. In this case, the display setting may be switched to OFF.

  In the above example, the original image file is deleted from the trash box file simultaneously with the restoration. However, the deletion process may be performed at another timing. For example, it may be carried out after the end of the trash box file display. As a result, when a plurality of image files are restored, the deletion process can be performed collectively, so that the processing efficiency can be improved.

<Permanently delete image files in trash file>
As described above, by individually setting display / non-display for each image file in the trash can file, it is possible to improve the viewing and manageability of the images in the trash can file, and to reduce the processing load. Reduction can be achieved.

  On the other hand, there is a problem that an unnecessary image file remains indefinitely, thereby pressing the storage capacity of the storage medium.

  Therefore, it is preferable that unnecessary image files in the trash box file can be completely deleted.

  In this case, the image files in the trash can file can be individually deleted, but can be efficiently processed by deleting unnecessary image files all at once.

  The digital camera 10 according to the present embodiment has a function (hereinafter referred to as a cleaning function) that collectively deletes image files whose display settings are OFF from the trash box file. Hereinafter, this cleaning function will be described.

  The cleaning function is called on the menu screen. That is, as one of the menu items, an item “cleaning the trash box file” is prepared in advance, and when this item is selected on the menu screen, a cleaning function is called (cleaning processing program is executed). .)

  If there are a plurality of trash files, a trash file selection process for performing the cleaning process is performed.

  The process execution instruction method is not limited to this. For example, a cleaning instruction may be given during reproduction display of a trash box file (reproduction display of a representative image).

  When the cleaning instruction is input, the CPU 110 analyzes the trash can file, deletes the image file whose display setting is OFF, and reconstructs the trash can file as shown in FIG.

  FIG. 17 is a flowchart showing the procedure of the cleaning process.

  When a cleaning instruction is input (step S80), the CPU 110 analyzes the trash box file (step S81), and determines whether there is an image file with display setting OFF based on the analysis result (step S82). ).

If it is determined that there is no image file whose display setting is OFF in the trash box file, the process ends (an error message is displayed if necessary and the process ends).
On the other hand, if it is determined that an image file with display setting OFF exists in the trash box file, it is determined whether or not there is an image file with display setting ON after the image file (step S83).

  If it is determined that there is an image file whose display setting is ON after the image file whose display setting is OFF, as shown in FIG. 18B, the subsequent image file is placed in the area of the image file whose display setting is OFF. Is copied (step S84). For example, in the example of FIG. 18, as shown in FIG. 18A, the display setting is ON for the image file A, the display setting is OFF for the image file B, the display setting is OFF for the image file C, and the image file D is Since the display setting ON is set, the image file D, which is the subsequent image file, is copied to the areas of the image files B and C with the display setting OFF as shown in FIG.

  Thereafter, the CPU 110 further determines whether or not there is an image file whose display setting is OFF (step S84). If it is determined that there is an image file whose display setting is OFF, the CPU 110 returns to step S83 to display the image file after that image file. It is determined whether there is an image file whose setting is ON.

  If the CPU 110 determines that there is no image file with the display setting ON after the image file with the display setting OFF, the CPU 110 updates the management information of the trash box file (step S86) and ends the process. In this case, as shown in FIG. 18C, the area after the last image file is released. That is, in the example shown in FIG. 18, the area after the end of the image file D which is the final image file is released.

  As a result, as shown in FIG. 18D, only the image file whose display setting is ON is left in the trash box file. The management information is updated, for example, when the display setting ON / OFF setting information is recorded in the header portion of the representative image area, the display setting information is updated to the latest information. In addition, the relevant information is updated to the latest information.

  In this way, by deleting (completely deleting) unnecessary image files from the trash can file, the file size of the trash can file can be reduced. Moreover, it can process efficiently by deleting collectively.

<Individual deletion of image files in trash file>
In the above example, the image files whose display setting is OFF in the trash can file are collectively deleted, but may be individually deleted.

  Hereinafter, a case where the image files in the trash box file are individually deleted will be described.

  FIG. 19 is a flowchart showing a processing procedure when individually deleting image files stored in the trash can file.

  The individual deletion process of the image file stored in the trash box file is performed by setting the camera mode to the individual deletion mode (step S90). Transition to the individual deletion mode is performed on the menu screen.

  When the camera mode is set to the individual deletion mode, the CPU 110 allows the user to select a directory (folder) (step S91). That is, the selection process of the directory storing the image file to be completely deleted is performed. This selection process is performed, for example, by displaying a list of DCF directories generated in the DCF image root directory of the memory card 152 and selecting one of them.

  When the directory is selected, the CPU 110 accesses the memory card 152 and determines whether or not a trash box file exists in the directory (step S92). If it is determined that there is no trash can file in the selected directory, the CPU 110 displays a predetermined error message (for example, “no trash can file”) on the monitor 28 (step S99).

  On the other hand, if a trash box file exists in the selected directory, the image of the image file stored in the trash box file is displayed on the monitor 28 (step S93). Using the operation unit, the user selects an image to be completely deleted from the images displayed on the monitor 28 and instructs execution of the complete deletion (step S94).

  Here, it is assumed that the image is displayed frame by frame, for example, frame advance is performed by pressing the right button of the cross button 36, and frame return is performed by pressing the left button. Then, an instruction for complete deletion is issued by pressing the down button. The user causes the monitor 28 to display an image to be completely deleted by pressing the right button or the left button of the cross button 36, and presses the down button when displayed. As a result, an image to be deleted is selected, and a complete deletion instruction is input.

  When an image to be deleted is selected and an instruction for complete deletion is input, CPU 110 causes monitor 28 to display a message confirming execution of the deletion (for example, “Do you want to delete this image completely?”). (Step S95). The user views the message and presses the MENU / OK button 38 when instructing execution of complete deletion, and presses the DISP / BACK button 40 when canceling the process.

  Based on the input from the operation unit 112, the CPU 110 determines whether execution of complete deletion has been instructed (step S96). If it is determined that execution of complete deletion has been instructed, the image file of the selected image is deleted from the trash box file. That is, the trash box file area in which the image file is stored is deleted (step S47).

  Note that, as described above, this deletion processing may be performed by completely deleting the area where the image file to be deleted is stored and reconstructing the trash box file, or storing the image file to be deleted. The deleted area may be deleted as NULL.

  Thereafter, the CPU 110 causes the monitor 28 to display a message asking whether to continue the process of complete deletion of the image file. The user confirms this message and inputs whether or not to continue the process from the operation unit 112.

  Based on the input from the operation unit 112, the CPU 110 determines whether or not it is necessary to continue the process (step S98). If it is determined that the end of the process is instructed, the process ends. On the other hand, when continuing, it returns to step S91 and performs the said process again.

  In this way, the image files in the trash can file can be individually deleted (completely deleted).

  In this mode, all image files in the trash box file are displayed regardless of whether the display setting is ON / OFF.

  In the above example, only the deletion process is performed, but the restoration process may be performed at the same time.

  FIG. 20 is a flowchart showing a procedure of processing for restoring / deleting an image file stored in a trash box file.

  This process is performed by setting the camera mode to the trash box file editing mode (step S100). The transition to the trash box file editing mode is performed on a menu screen, for example.

  When the camera mode is set to the trash box file editing mode, the CPU 110 allows the user to select a directory (folder) (step S101). That is, the selection processing of the directory storing the trash box file to be edited is performed.

  When a directory is selected, the CPU 110 accesses the memory card 152 and determines whether a trash box file exists in the directory (step S102). If it is determined that there is no trash can file in the selected directory, the CPU 110 displays a predetermined error message (for example, “no trash can file”) on the monitor 28 (step S115).

  On the other hand, if there is a trash box file in the selected directory, the image of the image file stored in the trash box file is displayed on the monitor 28 (step S103).

  Here, it is assumed that the image is displayed frame by frame, for example, frame advance is performed by pressing the right button of the cross button 36, and frame return is performed by pressing the left button. In addition, a restoration instruction is issued by pressing the upper button, and a complete deletion instruction is issued by pressing the lower button.

  Based on the input from the operation unit 112, the CPU 110 determines whether or not an instruction for frame advance / return of an image has been issued (step S104).

  Here, when frame advance is instructed, the CPU 110 displays the image of the next deleted image file on the monitor 28, and when the frame reverse is displayed, the image of the previously deleted image file (first In the case of the image file deleted in step S105, the last deleted image file image) is displayed on the monitor 28 (step S105).

  As described above, the user displays an image desired to be restored or completely deleted on the screen of the monitor 28 by operating the right button or the left button of the cross button 36.

  When the image of the image file desired to be restored or completely deleted is displayed on the monitor 28, the upper button or the lower button of the cross button 36 is pressed. That is, when it is desired to restore the image displayed on the monitor 28, the upper button of the cross button 36 is pressed, and when the deletion is desired, the lower button is pressed.

  If it is determined in step S104 that frame advance / frame return is not instructed, the CPU 110 determines whether display image restoration or deletion has been instructed based on an input from the operation unit (step S106).

  If it is determined that restoration is instructed (when it is determined that the upper button of the cross button 36 is pressed), the CPU 110 displays a message for confirming restoration (for example, “Do you want to restore this image?”). It is displayed on the monitor 28 (step S107). The user views the message and presses the MENU / OK button 38 when instructing to execute restoration, and presses the DISP / BACK button 40 when canceling the process.

  CPU110 determines whether execution of restoration was instructed based on an input from operation unit 112 (step S108). If it is determined that execution of restoration is instructed, the image file of the selected image is extracted from the trash box file, and the image file is restored (step S109). Then, the area of the trash box file in which the restored image file is stored is deleted (step S110).

  Thereafter, the CPU 110 causes the monitor 28 to display a message for inquiring the continuation of the restoration process. The user confirms this message and inputs the necessity of continuing the restoration process from the operation unit 112. Based on the input from the operation unit 112, the CPU 110 determines whether or not the continuation of the restoration process is necessary (step S114). Thereby, a desired image can be restored.

  On the other hand, when it is determined in step S106 that deletion has been instructed (when it is determined that the lower button of the cross button 36 has been pressed), the CPU 110 confirms the deletion execution (for example, “Delete this image completely”). Etc.? "Is displayed on the monitor 28 (step S71). The user views the message and presses the MENU / OK button 38 when instructing execution of complete deletion, and presses the DISP / BACK button 40 when canceling the process.

  CPU110 determines whether execution of deletion was instruct | indicated based on the input from the operation part 112 (step S112). If it is determined that execution of deletion has been instructed, the image file of the selected image is deleted from the trash box file (step S113).

  Thereafter, the CPU 110 causes the monitor 28 to display a message for inquiring the continuation of the restoration process. The user confirms this message and inputs the necessity of continuing the restoration process from the operation unit 112. Based on the input from the operation unit 112, the CPU 110 determines whether or not the continuation of the restoration process is necessary (step S114). As a result, unnecessary image files can be deleted from the trash box file and completely deleted from the memory card 152.

  In this manner, the image file can be restored and completely deleted in one mode (trash box file editing mode). As a result, the image file can be efficiently managed.

  In this example, the right button of the cross button 36 is forwarded, the left button is moved back, the upper button is restored, and the lower button is assigned to delete. For example, the right button of the cross button 36 is deleted, the left button May be restored, the upper button may be forwarded frame by frame, and the lower button may be assigned to frame backward.

  Further, it is preferable that the function assigned to the cross button 36 is displayed on the monitor 28 as an icon.

<Other examples of trash files>
As described above, the digital camera according to the present embodiment generates a trash box file according to the Exif format. In the representative image area D1, the image of the image file deleted first is stored as a representative image. The trash file generated in this way can be handled in the same way as a normal Exif file. When the Exif file is opened on a device that can recognize the file, a representative image (image of the image file that was deleted first) is displayed on the monitor. Is done.

  However, such a display may be confused with a normal image file and may be deleted by mistake.

  Therefore, it is more preferable that the trash can file can be distinguished from other image files at a glance.

  For this reason, it is preferable to store an image that can be recognized as a trash can file as a representative image in the representative image area D1.

  As such an image, an image as shown in FIG. 21 can be considered. FIGS. 9A to 9C show images of image files stored in the trash can file as indexes.

  FIG. 4A shows a representative image obtained by arranging and indexing images of a specific image file (for example, images of four image files deleted first) stored in a trash can file. Each image is arranged vertically and horizontally (in this example, 2 × 2).

  FIG. 4B shows a representative image obtained by randomly displaying images of a specific image file (for example, images of five image files deleted first) stored in a trash can file. Each image is arranged at random.

  FIG. 6C shows a representative image obtained by indexing all the image files stored in the trash can file, and is configured by arranging the images vertically and horizontally.

  On the other hand, FIG. 6D shows a trash can symbol as a representative image.

  When the image shown in FIG. 21D is used as a representative image, an image file of the image is prepared in advance (for example, stored in the ROM 116, the flash ROM 118, or the like), and the image is generated when the trash box file is generated. Generate a trash file using the file.

  On the other hand, as shown in FIGS. 21A to 21C, when using the image of the image file stored in the trash box file, the representative image is generated when the trash box file is generated.

  FIG. 22 is a flowchart showing a procedure of a trash box file generation process when an index image of an image stored in the trash box file is used as a representative image.

  This flowchart is a flowchart when the image shown in FIG. 21A is generated as a representative image of the trash can file. That is, this is a flowchart in the case where an index image is generated from images of four image files deleted first and the index image is used as a representative image.

  The point that the image file is deleted in the playback mode is the same as described above. First, the user sets the camera mode to the playback mode, and displays the image of the image file to be deleted on the monitor 28 (step S120).

  Based on the input from the operation unit 112, the CPU 110 determines whether or not the delete button 34 has been pressed, that is, whether or not deletion has been instructed (step S121).

  When determining that the deletion is instructed, the CPU 110 displays a deletion confirmation message on the monitor 28 (step S122). The user confirms this message and presses the MENU / OK button 38 to execute deletion, and presses the DISP / BACK button 40 to cancel the instruction. CPU110 determines whether execution of deletion was instruct | indicated based on the input from an operation part (step S123). When deletion is instructed, the CPU 110 determines whether or not a trash box file exists in the folder (directory) in which the deletion target image file is stored (step S124).

  If it is determined that there is no trash can file in the folder storing the image file to be deleted, the CPU 110 newly creates a trash can file (step S12).

  Thereafter, it is determined whether or not the representative image of the trash can file needs to be updated (step S126). That is, it is determined whether or not an index image has been generated from the images of the four image files deleted first.

  If it is determined that the index image has not been generated from the images of the first deleted four image files (when it is determined that the representative image needs to be updated), the CPU 110 generates an index image (representative image update). Process) (step S127). In other words, the digital signal processing unit 142 is caused to perform index image generation processing using the image of the deleted image file. Then, a trash can file is generated using the generated index image as a representative image. That is, the generated index image is stored in the representative image area D1 as a representative image.

  This update process of the representative image is performed until the index image is completed, that is, until the four image files are deleted.

  The CPU 110 records the image file of the image instructed to be deleted in the trash box file created in this way (step S128). Then, the image file of the image instructed to be deleted is deleted from the memory card 152 (step S129).

  Thereafter, the CPU 110 determines whether or not the end of the playback mode is instructed based on the input from the operation unit 112 (step S130), and ends the process when the end of the playback mode is instructed.

  The trash file generated in this way displays an image in which the images of the image files stored in the trash file at the time of display (images for the first four deleted images) are displayed as indexes. It can be easily identified from the file. Also, the contents can be confirmed.

  In this example, the index image is generated from the images of the four image files that are deleted first. However, the image for generating the index image and the number of images are not limited to this. Absent. For example, an index image may be generated from the images of the last four deleted image files (in this case, the index image is updated each time the image is deleted), or images extracted every certain number of images. An index image may be generated from.

  Further, as shown in FIG. 21C, when the image obtained by indexing all the images of the image file stored in the trash can file is used as the representative image, the representative image is updated every time the image file is deleted. Processing is performed.

  In addition, when generating an index image, it is preferable to synthesize a predetermined pattern (for example, a trash can image) on the background so that it can be clearly recognized that the file is a trash can file.

  When generating a representative image from an index image, the generation timing is not limited to the time of image deletion (addition to a trash can file) or the generation of a trash can file, but may be performed at an arbitrary timing. Good.

  In addition, when an index image is generated from a specific image file and used as a representative image, when the display setting of the image used for the index image is turned OFF, a representative image is generated again from the image with the display setting ON. You may do it.

  Further, when generating a representative image by generating index images from all image files, the representative image may be generated using only the image of the image file whose display setting is ON. In this case, when the display setting is switched, a representative image may be generated again.

<Other examples of how to display trash files>
As described above, in the digital camera according to the present embodiment, a trash can file is generated according to the Exif format. When the Exif file is opened by a device that can recognize the representative image, the representative image stored in the representative image area D1 is monitored. Is displayed.

  Here, as described above, when the index image of the deleted image stored in the trash can file is stored as the representative image, the index image is displayed on the monitor, so it can be easily compared with other image files. Can be distinguished.

  However, if the index image is not stored as a representative image, it may not be easily distinguishable from other image files.

  Therefore, when displaying a trash box file, it is preferable to display an index of images stored in the trash box file.

  Hereinafter, a process for displaying a trash box file will be described.

  FIG. 23 is a flowchart showing a processing procedure when an image stored in the trash box file is displayed as an index.

  As described above, when the playback mode is set (step S140), the image of the image file recorded on the memory card 152 is displayed on the monitor.

  First, the CPU 110 determines whether the image file to be displayed is a trash box file (step S141).

  If the CPU 110 determines that the file is not a trash can file, the CPU 110 displays the image of the image file on the monitor 28 in accordance with a normal display processing method (step S148).

  On the other hand, if the image file to be displayed is determined to be a trash box file, the CPU 110 analyzes the trash box file (step S142). Then, it is determined whether or not an index image is stored as a representative image in the representative image area D1 (step S143).

  Whether or not the representative image stored in the representative image area D1 is an index image is determined by, for example, reading the header information of the representative image area D1. Therefore, when an index image is recorded as a representative image, information indicating that the image is an index image is recorded in the header of the representative image area D1.

  When CPU 110 determines that the image stored as the representative image is an index image, CPU 110 displays the index image stored as the representative image on monitor 28 (step S144). Thereby, it is possible to confirm that the file is a trash box file and its contents.

  If thumbnails of index images stored as representative images are stored, these thumbnails may be displayed on the monitor. Thereby, the index image can be displayed quickly.

  On the other hand, if it is determined that no index image is stored as a representative image, an index image is generated from the image file stored in the trash box file (step S145). At this time, an index image is generated with the image of the image file whose display setting is ON.

  Then, the generated index image is displayed on the monitor 28 (step S146). Thereby, it is possible to confirm that the file is a trash box file and its contents.

  Note that when an index image is generated as a representative image, if a thumbnail is stored in each image file, the index image may be generated using the thumbnail.

  As described above, even when the index image is not recorded as the representative image of the trash can file (the image stored in the representative image area D1), the index image is generated from each image file stored in the trash can file, By displaying this on the monitor, a normal image file and a trash can file can be easily distinguished. In addition, the contents of the trash can file can be easily confirmed.

  In this example, if an index image is recorded as the representative image of the trash can file, the trash bin file is displayed using this index image, but it is stored in the trash can file regardless of the presence or absence of the index image. An index image may be generated from the image file and displayed on a monitor.

  In addition, the index image may be generated from images of all image files stored in the trash file, or an image of a specific image file (for example, N images deleted first, last deleted) N sheets (N is an integer)) may be generated. Moreover, the arrangement | sequence form can also take a various aspect.

  Further, when displaying the image of the trash can file, it is preferable to simultaneously display the number of images stored in the trash can file. Thereby, the number of stored sheets can also be grasped.

  In addition, when the contents of the trash box file are individually displayed, a display that can identify the number of images currently being displayed (for example, the total number is 102 and the third image is displayed). Is preferably displayed together with “3/102 sheets”.

<Other example 2 of display method of trash file>
As described above, in the digital camera according to the present embodiment, a trash can file is generated according to the Exif format. When the Exif file is opened by a device that can recognize the representative image, the representative image stored in the representative image area D1 is monitored. Is displayed.

  The trash can file is a collection of unnecessary image files that can be restored if necessary. Therefore, the trash box file need only be displayed when necessary (for example, when expanded, restored, or completely deleted). Such).

  Therefore, it is preferable that display / non-display of the trash can file can be arbitrarily set.

  In the following, a description will be given of processing in a case where display / non-display of the trash box file is arbitrarily set and the trash box file is displayed.

  The display / non-display setting of the trash box file is performed on a menu screen, for example. That is, as one of the menu items, a setting item for displaying / hiding the trash box file is prepared, and this item can be selected to set display / non-display (display ON / OFF). .

  The set information is stored in the flash ROM 118, for example. The CPU 110 performs a trash file display process in accordance with the display / non-display setting of the trash file.

  FIG. 24 is a flowchart showing the procedure of the image file reproduction process when the trash box file display / non-display setting is performed.

  First, when the camera mode is set to the playback mode (step S160). The image file stored in the memory card 152 is read (step S161). At this time, the file to be read first is not particularly limited, but here, it is assumed that the image file is taken last.

  The CPU 110 determines whether or not the read image file is a trash box file (step S162).

  If the CPU 110 determines that the read image file is not a trash can file, the CPU 110 displays the image of the image file on the monitor 28 according to normal processing (step S164).

  On the other hand, when determining that the read image file is a trash box file, the CPU 110 determines whether or not the display setting of the trash box file is turned on based on the setting information stored in the flash ROM 118 (step S163).

  If the CPU 110 determines that the display setting of the trash box file is set to ON, the CPU 110 displays the image of the image file (representative image) on the monitor 28 (step S164).

  On the other hand, when determining that the display setting of the trash box file is set to OFF, the CPU 110 does not display the image but reads the next image file (step S161).

  Thereafter, the CPU 110 determines whether or not a frame advance / frame return operation has been performed based on an input from the operation unit 112 (step S165). If it is determined that a frame advance / frame return operation has been performed, the process returns to step S161 to read out the next image file (frame advance character) or the previous image file (at the time of frame return). If it is determined that the frame advance / return operation has not been performed, it is determined whether or not the end of the playback mode has been instructed (step S166). If it is determined that the end of the playback mode has been instructed, the image playback is performed. The process ends.

  As described above, the display / non-display of the trash box file can be set, so that the trash box file can be prevented from being accidentally deleted, and the usability can be improved.

  In this example, the display setting of the trash box file is recorded in the flash ROM 118, but may be recorded in the trash box file itself (for example, recorded in a maker note or the like).

  In this example, the display setting of the trash can file is collectively performed, but display / non-display may be set individually for each trash can file.

<Another example of storage form of trash file>
In the above embodiment, a trash box file is generated for each DCF directory generated in the memory card. That is, the trash box file is stored in the same directory as the deleted image file.

  However, the storage location of the trash box file is not limited to this. Hereinafter, a storage form of the trash box file will be described.

  FIG. 25 is a schematic diagram showing another example of the directory structure of the memory card. As shown in the figure, in this example, the trash box file is stored in the DCF image root directory of the memory card. As described above, instead of storing the trash box file for each directory (folder) in which the image file is stored, it can be stored for each DCF image root directory.

  In this case, the trash can file itself may be generated in units of directories in which image files are stored, or may be generated as a single unit regardless of the directory in which the image files are stored. Good.

  FIG. 26 is a schematic diagram showing another example of the directory structure of the memory card. As shown in the figure, in this example, a dedicated directory (folder) for storing a trash box file is generated directly under the DCF image root directory, and the trash box file is stored in that directory.

  Also in this case, the trash can file itself may be generated for each directory in which the image file is stored, or may be generated as a single unit regardless of the directory in which the image file is stored. Also good.

  FIG. 27 is an explanatory diagram of another example of the storage form of the trash box file. As shown in the figure, in this example, an image file of an image obtained by photographing is stored in a memory card 152, and a trash box file is stored in a flash ROM 118 which is a built-in memory.

  Thereby, when the memory card 152 is removed from the camera and read by another device, it is possible to effectively prevent the trash box file from being accidentally deleted. In addition, it is possible to effectively prevent a malfunction from occurring because other devices cannot recognize the trash box file.

  In this case as well, the trash can file itself may be generated in units of the direction of the memory card in which the image file is stored. May be generated.

  As described above, if the trash box file is read by a device that cannot recognize the trash box file, a problem may occur.

  Therefore, it is preferable that the trash box file is not selectively recognized by an external device.

  As this method, for example, the attribute of the file may be set to a hidden file.

  In addition, the digital camera of this embodiment can be connected to an external device such as a personal computer via the communication interface 162. When connected, the digital camera is recognized as a storage device. By not notifying the external device side of the trash box file, the trash box file can be prevented from being recognized.

  Further, when the trash box file is stored in the internal memory of the device (the flash ROM 118 in the above example), the trash bin file is recognized by the external device by not allowing the external device to recognize (notify) the internal memory itself. Can be prevented.

<Other embodiments>
In the above embodiment, the case where the present invention is applied to a digital camera has been described as an example. However, the application of the present invention is not limited to this. Any device having a storage unit that stores an image and a function of displaying an image file stored in the storage unit can be applied in the same manner, and the same effects can be obtained. In particular, in the case of a personal computer, the above functions can be realized by a predetermined program.

  In the above embodiment, the trash box file is configured according to the Exif format, but the configuration of the trash box file is not limited to this. In other words, any configuration may be used as long as a plurality of deleted image files can be stored together as one file.

  Also, with regard to the image file to be stored, in the above embodiment, the case where the Exif file is stored has been described as an example, but the format of the image file to be stored is not particularly limited, and an image of another format is stored. The same applies to the case of deleting a file. Therefore, for example, a RAW image file can be stored.

  In this case, other image files such as an Exif file and a RAW image file may be mixed and stored in the trash can file, but a trash can file may be generated for each file format. That is, for example, an Exif file may be generated separately for an Exif file trash box file, and a RAW image file may be generated separately and stored separately for a RAW image file.

  When storing a RAW image file, the RAW image data may be compressed in a predetermined format, and the compressed image file may be stored. In this case, the compression method may be lossless compression or lossy compression. In the case of irreversible compression, the RAW image data stored in the RAW image file may be JPEG compressed, and the RAW image file may be converted into an Exif file and stored.

  In the above embodiment, the trash box file is recorded on the memory card in accordance with the DCF standard. However, the method of storing the trash box file and the method of assigning the trash box file name are not limited to this. .

  Further, in the above embodiment, the case of deleting a still image file has been described. However, the present invention can be similarly applied to the case of deleting a moving image file. In this case, the moving image file may be stored in a trash can file for each image file of the moving image, or a still image and a moving image file may be mixed and stored in the trash can file.

  In this embodiment, the image that has been instructed to be deleted is stored in the trash can file. However, when the delete instruction is issued, the user can select whether the image is to be stored in the trash can file or completely deleted, and the image is stored in the trash can file. It may be stored in the trash box file only when the user selects the item (when complete deletion is instructed, it is not stored in the trash box file but is completely deleted from the memory card).

The front perspective view which shows the external appearance structure of the digital camera to which this invention was applied The rear perspective view showing the appearance composition of the digital camera to which the present invention is applied Block diagram showing the electrical configuration of the digital camera of the present embodiment Schematic diagram of the data structure of an Exif file Conceptual diagram of trash file Schematic diagram showing the data structure of the trash file Schematic diagram of directory structure Flow chart showing the procedure of the trash file generation process Flowchart showing processing procedure for display setting of image file stored in trash file Figure showing a monitor display example Flowchart showing the procedure for displaying image files stored in the trash file Figure showing a monitor display example The flowchart which shows the procedure of the process in the case of performing a restoration process and display setting of an image file during the expansion display of a trash box file Figure showing a monitor display example Flow chart showing the procedure of restoration processing Conceptual diagram of cleaning process Flow chart showing the procedure of the cleaning process Conceptual diagram of the cleaning process procedure Flow chart showing the processing procedure when individually deleting image files stored in the trash file Flowchart showing a procedure for restoring / deleting an image file stored in the trash file Figure showing a display example of the trash file on the monitor The flowchart which shows the procedure of the production | generation process of a trash box file in case the index image of the image stored in a trash box file is made into a representative image. A flowchart showing a processing procedure for displaying an index stored in an image stored in a trash can file Flowchart showing the procedure of image playback processing when the trash box file display / non-display setting is performed Schematic diagram showing another example of the directory structure of the memory card Schematic diagram showing another example of the directory structure of the memory card Explanatory drawing of another example of storage form of trash file

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 ... Digital camera, 12 ... Camera body, 14 ... Shooting lens, 16 ... Flash, 18 ... Speaker, 20 ... AF auxiliary light lamp, 22 ... Shutter button, 24 ... Mode lever, 26 ... Power button, 30 ... Zoom button, 32 ... Play button, 34 ... Delete button, 36 ... Cross button, 38 ... MENU / OK button, 40 ... DISP / BACK button, 42 ... Face detection button, 110 ... CPU, 112 ... Operation unit, 116 ... ROM, 118 ... Flash ROM, 120 ... Memory (SDRAM), 122 ... VRAM, 134 ... Image sensor, 136 ... Image sensor controller, 138 ... Analog signal processor, 140 ... A / D converter, 142 ... Digital signal processor, 144 ... AF detection unit, 146... AE / AWB detection unit, 148... Compression / decompression processing unit, 150. Roller, 152 ... memory card (storage medium), 154 ... display controller, 156 ... OSD (On-Screen Display) unit, 158 ... flash control unit, 160 ... communication control unit, 162 ... communication interface

Claims (7)

Storage means;
Display means;
Image file display instruction means for instructing display of an image file stored in the storage means;
In response to an instruction from the image file display instruction unit, an image file display control unit that causes the display unit to display an image of the image file stored in the storage unit;
A deletion instruction means for selecting at least one of the images displayed on the display means and instructing the deletion;
A trash can file generating means for generating a trash file in which image files of images instructed to be deleted by the delete instruction means are combined;
A storage control unit for storing the trash box file generated by the trash box file generation unit in the storage unit, and for deleting the image file of the image instructed to be deleted by the deletion instruction unit;
Display setting means for individually setting ON / OFF of display for images of individual image files stored in the trash box file;
Setting information recording means for recording display setting information of individual image files set by the display setting means in a predetermined area of the trash can file;
A trash can file expansion display instruction means for instructing expansion display of a stored image file with respect to a trash file stored in the storage means;
In response to an instruction from the trash can file development display instruction means, a trash can file development display control means for causing the display means to display an image of an image file stored in the trash box file, based on the display setting information, A trash can file development display control means for causing the display means to display only the image of the image file whose display setting is ON;
An image file management apparatus comprising: A complete deletion instruction means for instructing deletion of an image file whose display setting is turned off with respect to the trash file stored in the storage means;
In response to the deletion instruction from the complete deletion instruction means, the image file whose display setting is turned off is deleted from the trash box file, and the display setting information of the trash box file after the image file is deleted is updated. Trash file editing means,
The image file management apparatus according to claim 1, further comprising: A restoration instruction means for selecting at least one of the image files in the trash box file displayed on the display means and instructing the restoration;
Image file restoration means for extracting and restoring the image file instructed for restoration by the restoration instruction means from the trash box file;
Deleting the image file restored by the image file restoring means from the trash file, and updating the trash file editing means for updating display setting information of the trash file after the image file is deleted;
The image file management apparatus according to claim 1, further comprising: A complete deletion instruction means for instructing deletion of an image file whose display setting is turned off with respect to the trash file stored in the storage means;
A restoration instruction means for selecting at least one of the image files in the trash box file displayed on the display means and instructing the restoration;
Image file restoration means for extracting and restoring the image file instructed for restoration by the restoration instruction means from the trash box file;
In response to a deletion instruction from the complete deletion instruction unit, the image file whose display setting is turned off is deleted from the trash file, and the image file restored by the image file restoration unit is deleted from the trash file. And a trash file editing means for updating the display setting information of the trash file after the image file is deleted,
The image file management apparatus according to claim 1, further comprising:   A trash box file display setting unit for setting display / non-display of the trash box file stored in the storage unit, and when the setting of the trash box file display setting unit is displayed, the image file display control unit includes: In response to a display instruction from the image file display instruction unit, the image of the image file stored in the storage unit is displayed on the display unit, and a predetermined representative image stored in the trash box file is displayed. The image file management apparatus according to claim 1, wherein the image file management apparatus is displayed on a unit.   Representative image generating means for generating the representative image, wherein the representative image generating means generates, as a representative image, an image in which the images of the image file stored in the trash can file are arranged according to a predetermined rule. The image file management apparatus according to claim 5.   A digital camera comprising the image file management device according to claim 1.