JP4298534B2 - Image display apparatus and method - Google Patents

Description

  The present invention relates to an image display apparatus and a display method for reproducing image data.

  Image display devices such as electronic cameras for recording and reproducing still images and moving images using a memory card having a solid-state memory element as a recording medium are already on the market, and electronic cameras equipped with an electronic viewfinder such as a color liquid crystal panel are also sold. Yes.

In recent years, the recording capacity of the recording medium has increased, and a large number of images can be recorded. In order to allow the user to easily view these images, there are some which display the total number of images or the serial number of the display image (see FIG. For example, Patent Document 1).
Japanese Patent Laid-Open No. 08-205014

  In such an image reproducing apparatus such as a conventional electronic camera, information in the recording medium is simultaneously displayed so that the user can easily view an image in the recording medium using an electronic viewfinder such as a color liquid crystal panel. However, as the recording capacity of the recording medium increases and the number of recorded images or the number of recording directories increases, it takes time to search for information in the recording medium and create display information. There was a problem that it took.

  An object of the present invention is to provide an image display apparatus and method capable of browsing a recorded image in a short time.

The image display apparatus according to the present invention is an image display apparatus for displaying on a display unit the image data in the recording medium, in response to power-up, before the search of all the directories in the recording medium is completed, An image display control means for searching for an initial image from images recorded on the recording medium and displaying the initial image on the display unit, and after searching all directories in the recording medium, And a total image number display control means for displaying the total number of images recorded on the recording medium based on an analysis result of information recorded in the recording medium .
An image display method according to the present invention is an image display method for displaying image data in a recording medium on a display unit, and before the search of all directories in the recording medium is completed in response to power-on, An image display control step of searching for an initial image from images recorded on the recording medium and displaying the initial image on the display unit; and after searching all directories in the recording medium, And a total image number display control step for displaying the total number of images recorded on the recording medium based on the analysis result of the information recorded in the recording medium.

According to the present invention, in an image playback device such as an electronic camera, the information in the recording medium is displayed at the same time so that the user can easily view the image in the recording medium using an electronic viewfinder such as a color liquid crystal panel. the recording capacity of the recording medium becomes large, the number of recorded images, as the number of recording directory is increased, Gakari to create a searching recording medium in the information display information time, time to the user to browse images It is possible to provide an image display apparatus and an image display method that solve such a problem.

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

  FIG. 1 is a diagram showing a configuration of an embodiment of the present invention. In an image processing apparatus 100 according to an embodiment of the present invention, 10 is a photographing lens, 12 is a shutter having a diaphragm function, 14 is an image sensor that converts an optical image into an electrical signal, and 16 is an analog signal output of the image sensor 14. It is an A / D converter for converting into a digital signal.

  A timing generation circuit 18 supplies a clock signal and a control signal to the image sensor 14, the A / D converter 16, and the D / A converter 26, and is controlled by the memory control circuit 22 and the system control circuit 50.

  An image processing circuit 20 performs predetermined pixel interpolation processing and color conversion processing on the data from the A / D converter 16 and the data from the memory control circuit 22. In addition, the image processing circuit 20 performs predetermined arithmetic processing using the captured image data, and the system control circuit 50 performs exposure control means 40 and distance measurement control means 42 based on the arithmetic result of the image processing circuit 20. TTL (through-the-lens) AF (autofocus) processing, AE (automatic exposure) processing, and EF (flash pre-emission) processing for performing control are performed. Further, the image processing circuit 20 performs predetermined calculation processing using the captured image data, and also performs TTL AWB (auto white balance) processing based on the obtained calculation result.

A memory control circuit 22 controls the A / D converter 16, the timing generation circuit 18, the image processing circuit 20, the image display memory 24, the D / A converter 26, the memory 30, and the compression / decompression circuit 32. Output data of the A / D converter 16 via the image processing circuit 20 and memory control circuit 22 are writable into the image display memory 24 or the memory 30, also via the memory control circuit 22, an image display memory 24 The data can be written to the memory 30. At the time of reproduction, the compressed image data read from the recording medium 200 or 210 to the memory 30 is decompressed by the compression / decompression circuit 32 and developed in the image display memory 24.

  Reference numeral 24 denotes an image display memory, 26 denotes a D / A converter, 28 denotes an image display unit including a TFT LCD, and the image data for display written in the image display memory 24 passes through the D / A converter 26. Displayed by the image display unit 28. If the image data captured using the image display unit 28 is sequentially displayed, the electronic viewfinder function can be realized.

  The image display unit 28 can superimpose various information displays by OSD (On Screen Display). The display contents include single shot / continuous shooting display, self-timer display, compression rate display, recording pixel number display, recording Number display, Displayed image serial number display, Number of remaining shots display, Shutter speed display, Aperture value display, Exposure compensation display, Flash display, Red-eye reduction display, Macro shooting display, Buzzer setting display, Clock battery level display, Battery level display There are a quantity display, an error display, an information display by a multi-digit number, an attachment / detachment state display of the recording media 200 and 210, a communication I / F operation display, and a date / time display.

  Reference numeral 30 denotes a memory for storing captured still images and moving images, and has a storage capacity sufficient to store a predetermined number of still images and a moving image for a predetermined time. Thereby, even in the case of continuous shooting or panoramic shooting in which a plurality of still images are continuously shot, a large amount of images can be written in the memory 30 at high speed. The memory 30 can also be used as a work area for the system control circuit 50.

  A compression / decompression circuit 32 compresses / decompresses image data by adaptive discrete cosine transform (ADCT) or the like, reads an image stored in the memory 30 and performs compression processing or decompression processing, and stores the processed data in the memory 30. Write.

  Reference numeral 40 denotes exposure control means for controlling the shutter 12 having a diaphragm function, and has a flash light control function in cooperation with the flash 48.

  Reference numeral 42 denotes a distance measuring control means for controlling the focusing of the photographing lens 10, reference numeral 44 denotes a zoom control means for controlling zooming of the photographing lens 10, and reference numeral 46 denotes a barrier control means for controlling the operation of the protection means 102 as a barrier.

  A flash 48 has an AF auxiliary light projecting function and a flash light control function. The exposure control means 40 and the distance measurement control means 42 are controlled using a TTL (through-the-lens) method, and the system control circuit 50 is based on the calculation result obtained by calculating the captured image data by the image processing circuit 20. The exposure control means 40 and the distance measurement control means 42 are controlled.

  A system control circuit 50 controls the entire image processing apparatus 100, and a memory 52 stores constants, variables, programs, and the like for operation of the system control circuit 50. Reference numeral 54 denotes a display unit such as a speaker that displays an operation state, a message, and the like using a voice or the like in accordance with execution of a program in the system control circuit 50, and is configured by a combination of, for example, an LED and a sounding element.

  The display unit 54 is partially installed in the optical viewfinder 104. Among the display contents of the display unit 54, what is displayed in the optical viewfinder 104 includes in-focus display, camera shake warning display, flash charge display, shutter speed display, aperture value display, exposure correction display, and the like.

  Reference numeral 56 denotes an electrically erasable / recordable nonvolatile memory such as an EEPROM.

  Reference numerals 60, 62, 64, and 70 are operation means for inputting various operation instructions of the system control circuit 50, and include any one or a combination of a switch, a dial, a touch panel, a pointing by gaze detection, a voice recognition device, and the like. . Here, these operation means will be specifically described.

  Reference numeral 60 denotes a mode dial switch, which can switch and set various function modes such as power-off, automatic shooting mode, shooting mode, panoramic shooting mode, playback mode, multi-screen playback / erase mode, and PC connection mode.

  A first shutter switch (SW1) 62 is turned on during the operation of a shutter button (not shown), and AF (auto focus) processing, AE (auto exposure) processing, AWB (auto white balance) processing, and EF (flash pre-flash). ) Instruct the start of operations such as processing.

  A second shutter switch (SW2) 64 is turned on when the operation of a shutter button (not shown) is completed, and the image signal read from the image sensor 12 is written into the memory 30 via the A / D converter 16 and the memory control circuit 22. Exposure processing, development processing using computations in the image processing circuit 20 and the memory control circuit 22, and image data are read out from the memory 30, compressed by the compression / decompression circuit 32, and image data is stored in the recording medium 200 or 210. An instruction to start the operation of a series of processing called recording processing to be written is given.

  Reference numeral 70 denotes an operation unit composed of various buttons, a touch panel, etc., a menu button, a set button, a macro button, a multi-screen playback page break button, a flash setting button, a single shooting / continuous shooting / self-timer switching button, menu movement + (plus) Buttons, menu movement- (minus) button, reproduction image movement + (plus) button, reproduction image- (minus) button, shooting image quality selection button, exposure correction button, date / time setting button, and the like.

  Reference numeral 80 denotes a power control means, which includes a battery detection circuit, a DC-DC converter, a switch circuit for switching a block to be energized, etc., and detects the presence / absence of a battery, the type of battery and the remaining battery level, and the detection result In addition, the DC-DC converter is controlled based on an instruction from the system control circuit 50, and a necessary voltage is supplied to each unit including the recording medium for a necessary period.

  82 is a connector, 84 is a connector, 86 is a primary battery such as an alkaline battery and a lithium battery, a secondary battery such as a NiCd battery, a NiMH battery and a Li battery, an AC adapter, or the like.

  90 and 94 are interfaces with a recording medium such as a memory card and a hard disk, 92 and 96 are connectors for connecting to a recording medium such as a memory card and a hard disk, and 98 is a recording medium 200 or 210 attached to the connector 92 and / or 96. Recording medium attachment / detachment detecting means for detecting whether or not the recording medium is present.

  In the present embodiment, the description has been given assuming that the interface and the connector for attaching the recording medium have two systems, but the interface and the connector for attaching the recording medium may be either one or a plurality. Moreover, it is good also as a structure provided with combining the interface and connector of a different standard. The interface and connector may be configured using a PCMCIA card or a CF (Compact Flash (registered trademark)) card or the like that conforms to the standard.

  Further, when the interfaces 90 and 94 and the connectors 92 and 96 are configured using a PCMCIA card, a CF (compact flash) card, or the like, a LAN card, a modem card, a USB card, an IEEE 1394 card, a P1284 card. By connecting various communication cards such as SCSI cards and communication cards such as PHS, image data and management information attached to the image data can be transferred to and from other computers and peripheral devices such as printers. I can do it.

  Reference numeral 102 denotes protection means that is a barrier that prevents the imaging unit from being soiled or damaged by covering the imaging unit including the lens 10 of the image processing apparatus 100.

  Reference numeral 104 denotes an optical viewfinder, which can take an image using only the optical viewfinder without using the electronic viewfinder function of the image display unit 28.

  A communication unit 110 has various communication functions such as RS232C, USB, IEEE1394, P1284, SCSI, modem, LAN, and wireless communication.

  Reference numeral 112 denotes a connector for connecting the image processing apparatus 100 to another device by the communication unit 110 or an antenna for wireless communication.

  The recording medium 200 includes a recording unit 202 composed of a semiconductor memory or a magnetic disk, an interface 204 with the image processing apparatus 100, and a connector 206 for connecting to the image processing apparatus 100.

  Similar to the recording medium 200, the recording medium 210 includes a recording unit 212 composed of a semiconductor memory, a magnetic disk, and the like, an interface 214 with the image processing apparatus 100, and a connector 216 that connects to the image processing apparatus 100.

  The operation of this embodiment will be described with reference to FIGS. 2 and 3 show a flowchart of the main routine of the image processing apparatus 100 of the present embodiment.

  Upon power-on such as battery replacement, the system control circuit 50 initializes flags, control variables, and the like (S101), and initializes the image display of the image display unit 28 to an off state (S102).

  The system control circuit 50 determines the setting position of the mode dial 60, and when the mode dial 60 is set to power off (S103), the display of each display unit is changed to the end state, and the barrier of the protection means 102 is set. The image capturing unit is closed and the image capturing unit is protected, necessary parameters and setting values including a flag and a control variable, and a setting mode are recorded in the non-volatile memory 56, and each unit of the image processing apparatus 100 including the image display unit 28 is controlled by the power control unit 80. After performing a predetermined end process such as shutting off unnecessary power (S105), the process returns to S103.

  When the mode dial 60 is set to the reproduction mode (S103), the process proceeds to S106. When the mode dial 60 is set to another mode (S103), the system control circuit 50 executes a process according to the selected mode (S104), and when the process is completed, the process returns to S103.

  The system control circuit 50 determines whether or not there is a problem in the operation of the image processing apparatus 100 with respect to the remaining capacity and operation status of the power supply 86 configured by a battery or the like by the power supply control means 80 (S106). For example, after a predetermined warning is displayed by image and / or sound using the display unit 54 (S108), the process returns to S103.

  When there is no problem with the power supply 86 (S106), the system control circuit 50 determines whether the operation state of the recording medium 200 or 210 has a problem with the operation of the image processing apparatus 100, particularly with respect to the recording / reproducing operation of image data with respect to the recording medium. If there is a problem, the image display unit 28 and the display unit 54 are used to display a predetermined warning with an image and / or sound (S108), and the process returns to S103.

  When there is no problem in the operation state of the recording medium 200 or 210 (S107), various setting states of the image processing apparatus 100 are displayed by an image and / or sound using the image display unit 28 and the display unit 54 (S109). .

  The system control circuit 50 instructs the start of initial image analysis (S110) and the start of total image analysis (S111) in order to acquire the initial image and total image information in the recording media 200 and 210 for display.

  The system control circuit 50 sets the image display of the image display unit 28 to the on state (S112), performs a reproduction process (S113) described later, and then returns to S103.

  In the reproduction process, confirmation of completion of initial image analysis (S201) and completion of total image analysis (S202) is performed. If only analysis of the initial image is completed, the reproduction target image is set as the initial image (S206), and decompression is performed. An expansion process is executed (S207).

  Further, when the analysis of the total image is completed, the total number of images is displayed (S203). Also, the presence / absence of an image forwarding instruction is determined (S204), the instructed image is set as a reproduced image (S205), and decompression / expansion processing (S207) is performed.

  FIG. 4 shows a detailed flowchart of the decompression / expansion processing in S207 of FIG. The system control circuit 50 determines whether or not the image for which decompression has been instructed has already been developed in the image display memory 24 (S301), and if it has not been developed, reads the target file from the recording medium 200 or 210 to the memory 30 (S302). ).

  The memory control circuit 22 decompresses the read compressed file by the image processing circuit 20 (S303) and develops it in the image display memory 24 (S304).

  FIG. 5 is a flowchart of the initial image analysis start process. When an instruction to start initial image analysis is given in step S110 of FIG. 2, if initial image analysis has not yet been performed (S401), initial image analysis processing described later is started (S402).

  FIG. 6 shows a detailed flowchart of the initial image analysis process. The system control circuit 50 reads the root directory entry from the recording medium 200 or 210 (S501). The root directory entry read in S501 is analyzed to determine the presence / absence of the “/ DCIM” directory (S502). If “/ DCIM” does not exist, it is determined that there is no reproduced image, and this flow is exited.

  If “/ DCIM” exists, the directory entry “/ DCIM” is read, and the search directory number is set to 999, which is the maximum value in the DCF standard (S504). If it is determined that the corresponding directory exists (S505), the directory entry is read (S506), and the presence / absence of a reproducible file is determined (S507). Note that / DCIM / “DirNumXXXXXX” described in S505 and S506 is, for example, when DirNum is 100, becomes / DCIM / 100XXXX, and XXXXXX is five ASCII single-byte alphanumeric characters.

  If there is no reproduced image in S507, the next directory is searched (S509, S510). If it is determined that a reproduced image exists, the file with the maximum number of reproducible images is set as an initial image (S508), and the flow is exited.

This initial image analysis process may be performed in parallel with the main flow shown in FIG.
In the flow of FIG. 6, the last file in the DCF standard is searched as an initial image, but this is an example, and the first or the first file in the recording order on the recording medium is recorded in the DCF standard. It can be a file.

  Further, when the initial image has been determined in advance and the information is stored in the nonvolatile memory or the like, the initial image may be determined based on the contents of the nonvolatile memory without searching the directory entry.

  FIG. 7 is a flowchart of the total image analysis start process. When the total image analysis start instruction is given in step S111 in FIG. 2 and the total image analysis has not been performed (S601), the total image analysis process described later is started (S602).

  FIG. 8 shows a detailed flowchart of the total image analysis process. The system control circuit 50 resets the stored total number of images (TotalNum) to 0 (S701). The root directory entry is read from the recording medium 200 or 210 (S702). The root directory entry read in S702 is analyzed, and the presence / absence of the “/ DCIM” directory is determined (S703). If “/ DCIM” does not exist, it is determined that there is no reproduced image, and the flow exits.

  If “/ DCIM” exists, the directory entry “/ DCIM” is read, and the search directory number is set to 999, which is the maximum value in the DCF standard (S705). If there is a corresponding directory (S706), this directory entry is read (S707), the number of reproducible files is determined, and added to TotalNum (S708). For example, when DirNum is 100, / DCIM / “DirNumXXXXXX” described in S706 is / DCIM / 100XXXX, and XXXXXX is five ASCII single-byte alphanumeric characters.

  After the processing of S708 is completed or when there is no reproduced image in S706, the search is continued until DirNum becomes 100 (S709, S710), and the total number of images is acquired. This total image analysis processing may be performed in parallel with the main flow shown in FIG.

It is a block diagram of a configuration of an embodiment of the present invention. It is a part of flowchart of the main routine of a present Example. It is a part of flowchart of the reproduction | regeneration routine of a present Example. It is a flowchart of the expansion | deployment expansion routine of a present Example. It is a flowchart of the initial image analysis start routine of the present embodiment. It is a flowchart of the initial image analysis routine of the present embodiment. It is a flowchart of the total image analysis start routine of a present Example. It is a flowchart of the total image analysis routine of a present Example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10: Shooting lens 12: Shutter 14: Image pick-up element 16: A / D converter 18: Timing generation circuit 20: Image processing circuit 22: Memory control circuit 24: Image display memory 26: D / A converter 28: Image display part 30: Memory 32: Image compression / decompression circuit 40: Exposure control means 42: Distance measurement control means 44: Zoom control means 46: Barrier control means 48: Flash 50: System control circuit 52: Memory 54: Display unit 56: Non-volatile memory 60: Mode dial switch 62: Shutter switch SW1 64: Shutter switch SW2 70: Operation unit 80: Power supply control means 82: Connector 84: Connector 86: Power supply means 90: Interface 92: Connector 94: Interface 96: Connector 98: Recording medium Attachment / detachment detection means 1 DESCRIPTION OF SYMBOLS 0: Image processing apparatus 102: Protection means 104: Optical finder 110: Communication means 112: Connector (or antenna) 200: Recording medium 202: Recording part 204: Interface 206: Connector 210: Recording medium 212: Recording part 214: Interface 216 :connector

Claims (12)

An image display device for displaying image data in a recording medium on a display unit ,
An image for searching for an initial image from images recorded on the recording medium and displaying the initial image on the display unit before searching for all directories in the recording medium in response to power-on. Display control means;
Total image number display control means for displaying the total number of images recorded in the recording medium based on the analysis result of the information recorded in the storage medium after searching all directories in the recording medium
An image display device comprising: The image display device according to claim 1, wherein the initial image is an image having a maximum file number in the recording medium. The image display device according to claim 1 , wherein the initial image is a final image in a specific counting method in the recording medium. The initial image is the image display apparatus according to claim 1, wherein the first image in a specific counting method in the recording medium. The image display device according to claim 3 or 4 , wherein the specific counting method is based on a DCF (Design rule for Camera File system) rule. The image display apparatus according to claim 3 or 4 , wherein the specific counting method is based on a storage order in the recording medium. An image display method for displaying image data in a recording medium on a display unit ,
An image for searching for an initial image from images recorded on the recording medium and displaying the initial image on the display unit before searching for all directories in the recording medium in response to power-on. A display control step;
Total image number display control step of displaying the total number of images recorded on the recording medium based on the analysis result of information recorded in the storage medium after searching all directories in the recording medium
An image display method characterized by comprising : The image display method according to claim 7, wherein the initial image is an image having a maximum file number in the recording medium. The image display method according to claim 7 , wherein the initial image is a final image in a specific counting method in the recording medium. The initial image is an image display method according to claim 7 which is the first image in a specific counting method in the recording medium. The image display method according to claim 9 or 10 , wherein the specific counting method is based on a DCF rule. The image display method according to claim 3 or 4 , wherein the specific counting method is based on a storage order in the recording medium.

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