JP2004229172A - Electronic camera - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electronic camera capable of recording photographed image data by automatically selecting a recording medium so that features of each of a plurality of recording media are utilized. <P>SOLUTION: The plurality of recording media 46, 48 with different characteristics (such as recording speed and capacity) can be simultaneously attached to the camera 10. The CPU 12 of the camera 10 recognizes types of each of the recording media 46, 48 and confirms recording capacity of each of them. The CPU 12 performs control for automatically switching the recording media so that the photographed image data are recorded in the recording medium 46 of small capacity when a user selects the recording mode of a still image and moving image data are recorded in the recording medium 48 of large capacity when the user selects the recording mode of a moving image. In addition, the recording medium is automatically selected so that the data are recorded in the recording medium 48 of large capacity when the user selects the recording mode of high pixel and low compression rate (high image quality) and the data are recorded in the recording medium of small capacity when the mode of low image quality with small file size is selected. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an electronic camera including an imaging unit that converts an optical image of a subject into an electrical signal, and more particularly to an electronic camera that can record image data on a plurality of recording media.
[0002]
[Prior art]
Patent Document 1 discloses a recording apparatus that can record images on a plurality of recording media. The apparatus shown in the document 1 is a photographing apparatus called a rotary camera, which has two camera units, detects the remaining amount of microfilm as a recording medium, and the remaining amount of film becomes a predetermined amount or less. Control is performed so that the recording camera is automatically switched.
[0003]
Further, in Patent Document 2, in a digital camera in which a plurality of recording media can be mounted, when two recording media having different recording capacities are mounted, data corresponding to the data size of an image to be recorded is recorded. A technique for automatically selecting a storage destination is disclosed.
[0004]
[Patent Document 1]
JP-A-8-43952
[0005]
[Patent Document 2]
JP 2001-245248 A
[0006]
[Problems to be solved by the invention]
However, each recording medium has characteristics, and it is assumed that the target camera performance cannot be achieved when recording media having different characteristics are inserted into double slots into which a plurality of recording media can be inserted. For example, when recording a moving image directly on a recording medium having a very low recording speed, the image quality deteriorates unless recording is performed at a certain recording speed or higher. Also when recording a still image, the recording process is slow, the interval until the next shooting (recording interval) becomes long, and a photo opportunity is missed.
[0007]
On the other hand, when a recording medium with a small recording capacity is used, the recording time of moving images is shortened, and the number of recorded images of a low-compression and high-pixel data amount is small. As described above, it is conceivable that the target camera performance cannot be sufficiently obtained depending on the recording medium to be mounted.
[0008]
The present invention has been made in view of such circumstances, and an electronic camera capable of automatically selecting a storage medium according to the situation and recording photographed image data so as to make use of the characteristics of each of the plurality of recording media. The purpose is to provide.
[0009]
[Means for Solving the Problems]
In order to achieve the above object, the present invention provides an electronic camera that can use a plurality of recording media having different characteristics as a medium for recording image data acquired by photographing, and the plurality of the same mounted on the electronic camera. Characteristic recognition means for recognizing the characteristics of the recording medium, setting operation means for setting the recording conditions of the data, characteristics of each recording medium recognized by the characteristic recognition means, and recording conditions set by the setting operation means A medium selecting unit that automatically selects a recording medium on which the data is to be recorded among the plurality of recording media, and a recording processing unit that performs a process of recording the data on the recording medium selected by the medium selecting unit; , Provided.
[0010]
The electronic camera of the present invention can simultaneously mount a plurality of recording media having different characteristics, and selectively record captured image data on the plurality of recording media. The recording medium may be a fixed medium (such as an internal memory) built in the camera or a removable medium that can be attached to and detached from the camera, and one of a plurality of recording media is fixed. A mode in which the medium and the other is a portable medium is also possible. The characteristics of the recording medium include, for example, recording speed, capacity, whether it is rewritable (rewritable) or not rewritable (write once), and the like.
[0011]
In the present invention, each characteristic of the recording medium attached to the camera is grasped by the characteristic recognition means, while referring to the data recording conditions designated by the setting operation means, according to the characteristics of the medium and the characteristics of the recording data. The medium selection means automatically switches the recording medium. Then, the captured image data generated according to the recording condition designated by the setting operation means is written on the recording medium automatically selected by the medium selecting means.
[0012]
As described above, according to the present invention, since the recording medium is automatically selected according to the characteristics of the recording medium and the characteristics of the recording data, the user can take advantage of the advantages of each recording medium without being aware of it. Data can be recorded.
[0013]
An electronic camera according to an aspect of the present invention is an electronic camera capable of recording a moving image and a still image, wherein the characteristic recognition unit includes a capacity detection unit that detects a free space of the plurality of recording media, and the setting The operation unit includes a mode selection unit that switches between a moving image mode for recording a moving image and a still image mode for recording a still image, and the medium selecting unit stores moving image data on a recording medium having a large free space among the plurality of recording media. The recording medium is selected so as to record.
[0014]
Video data tends to have a relatively large data volume compared to still image data, so video data is recorded on a large-capacity recording medium, and data with a relatively small data capacity, such as still images, is recorded with a small capacity. It is preferable to record on a medium.
[0015]
According to another aspect of the present invention, the characteristic recognizing unit includes a capacity detecting unit that detects a free capacity of the plurality of recording media, and the setting operation unit includes at least one of a recording pixel number and a compression rate. Including a means for setting conditions, and the medium selecting means is compared with a recording medium having a large free space among the plurality of recording media according to the size of data generated according to the recording conditions set by the setting operation means. A recording medium is selected so as to record data of a large size.
[0016]
The number of recording pixels and the compression rate are parameters that affect the reproduction quality of the recorded image. The larger the number of recording pixels and the lower the compression rate, the larger the data size, but a high-quality image can be obtained. . In a configuration in which at least one condition of the number of recording pixels and the compression rate can be variably set by the setting operation means, the data size of the recording data is judged, and for a data having a relatively large data size, a large-capacity recording medium On the other hand, it is preferable that the recording medium is selected so that data having a relatively small data size is recorded on a small-capacity recording medium.
[0017]
According to still another aspect of the present invention, the characteristic recognition means includes means for recognizing recording speeds of the plurality of recording media, and the setting operation means includes a moving image mode for performing moving image recording and continuous recording of still images. Mode selection means capable of selecting at least one of the continuous shooting modes for performing the recording, and the medium selection means, when the moving image mode or the continuous shooting mode is selected by the setting operation means, the plurality of recording media The recording medium is selected so that data is recorded on a recording medium having a high recording speed.
[0018]
When a mode that requires high speed, such as moving image recording or continuous shooting, is selected, a mode in which a recording medium capable of high speed writing is selected and data is recorded thereon is preferable.
[0019]
DETAILED DESCRIPTION OF THE INVENTION
A preferred embodiment of an electronic camera according to the present invention will be described in detail below with reference to the accompanying drawings.
[0020]
FIG. 1 is a block diagram showing a configuration of an electronic camera according to an embodiment of the present invention. The camera 10 shown in the figure is a digital camera that converts an optical image of a subject into digital image data and records it on a recording medium, and has a recording / playback function for still images and a recording / playback function for moving images with sound. .
[0021]
The overall operation of the camera 10 is centrally controlled by a central processing unit (CPU) 12 built in the camera. The CPU 12 functions as a control unit that controls the camera system according to a predetermined program, and also functions as a calculation unit that performs various calculations such as an automatic exposure (AE) calculation and an automatic focus adjustment (AF) calculation.
[0022]
The CPU 12 is connected to a memory control circuit 16 via a bus 14, and the memory control circuit 16 is connected to a ROM 20 and a memory (SDRAM) 22 via a bus 18. The ROM 20 stores programs executed by the CPU 12, various data necessary for control, and the like. The memory 22 is used as a program development area and a calculation work area for the CPU 12, and is also used as a temporary storage area for image data and audio data. Note that the ROM 20 that is a nonvolatile storage means may be rewritable or may be rewritable like an EEPROM.
[0023]
The camera 10 is provided with operation means 30 for the user to input various commands. The operation unit 30 includes various operation units such as an image quality mode setting operation unit 31, a recording pixel number setting operation unit 32, a moving image / still image mode selection operation unit 33, a shutter button 34, and a continuous shooting mode setting operation unit 35.
[0024]
The image quality mode setting operation unit 31 is an operation means for setting the recording image quality (here, the compression rate) of captured image data. In the camera 10 of this example, three types of image quality (recording compression rate) of “FINE” with high image quality (low compression rate), “NORMAL” with standard image quality, and “BASIC” with high compression rate are selected according to the purpose of shooting. Can be selected.
[0025]
The recording pixel number setting operation unit 32 is an operation means for setting the recording pixel number (image size) of the captured image data. In the camera 10 of this example, any number of recording pixels can be selected from 2832 × 2128 (6M), 2048 × 1536 (3M), 1280 × 960 (1M), and 640 × 480 (VGA). The data amount (file size) of the captured image changes depending on the combination of the recording image quality and the number of recording pixels.
[0026]
The moving image / still image mode selection operation unit 33 is an operation means for switching between “moving image mode” for recording moving images and “still image mode” for recording still images. The shutter button 34 is an operation means for inputting an instruction to start shooting, and functions as a recording start (start) / stop (stop) button in moving image shooting, and functions as a release button in still image shooting. The shutter button 34 is composed of a two-stroke switch having an S1 switch that is turned on when half-pressed and an S2 switch that is turned on when fully pressed.
[0027]
The continuous shooting mode setting operation unit 35 performs a continuous shooting mode in which continuous shooting (continuous shooting) of still images is performed by pressing the shutter button 34 once, and one stationary operation is performed by pressing the shutter button 34 once. This is an operation means for switching between a normal mode (single shooting mode) for executing image shooting.
[0028]
Although not shown in the figure, the operation means 30 includes a mode selection means for switching between the photographing mode and the reproduction mode, a zoom operation means for changing the photographing magnification and the reproduction magnification, and a menu screen on the liquid crystal monitor 40. Menu button to be displayed, cross key for selecting a desired item from the menu screen (cursor moving operation means), OK button for commanding confirmation of selection item and execution of processing, deletion of desired object such as selection item, and cancellation of instruction contents Alternatively, operation means such as a cancel button for inputting a command for returning to the previous operation state is also included. Note that the operation means 30 is not limited to a push-type switch member, dial member, lever switch, or the like, and includes those realized by a user interface that selects a desired item from a menu screen. It is.
[0029]
An operation signal from the operation means 30 is input to the CPU 12. The CPU 12 controls each circuit of the camera 10 based on an input signal from the operation means 30, for example, lens drive control, shooting operation control, image processing control, image data recording / playback control, display control of the liquid crystal monitor 40, etc. I do.
[0030]
The liquid crystal monitor 40 can be used as an electronic viewfinder for checking the angle of view at the time of shooting, and is used as a means for reproducing and displaying a recorded image. The liquid crystal monitor 40 is also used as a user interface display screen, and displays information such as menu information, selection items, and setting contents as necessary. Instead of a liquid crystal display, other types of display devices (display means) such as an organic EL can be used.
[0031]
The camera 10 includes two media sockets (media mounting portions) 42 and 44, and different types of recording media 46 and 48 can be mounted in the media sockets 42 and 44, respectively. The form of the recording media 46 and 48 is not particularly limited, and a semiconductor memory card typified by SmartMedia (trademark), a portable small hard disk typified by Microdrive (trademark), a magnetic disk, an optical disk, a magneto-optical disk, etc. Various media can be used. In implementing the present invention, the number of media sockets is not particularly limited. The means for recording image data is not limited to a removable medium (a portable recording medium having a structure that is detachable from the camera 10), and may be a recording medium (an internal memory) built in the camera 10.
[0032]
In this example, a semiconductor memory card is used as the recording medium 46 attached to the first media socket 42, and a portable small hard disk is used as the recording medium 48 attached to the second media socket 44. A semiconductor memory card has a feature that it has a smaller recording capacity than a small hard disk but has a higher recording speed. On the other hand, a portable small hard disk has a large recording capacity but a slow recording speed.
[0033]
In order to take advantage of the characteristics of the recording media 46 and 48, the camera 10 has a function of automatically selecting the recording media 46 or 48 used for recording. The media selection function of the camera 10 will be described later.
[0034]
The two media sockets 42 and 44 are connected to a media interface (I / F) circuit 52 via a bus 50. The media I / F circuit 52 is connected to the CPU 12 via the bus 14, and performs necessary signal conversion in order to deliver input / output signals suitable for reading and writing of the recording media 46 and 48 in accordance with instructions from the CPU 12.
[0035]
Each of the media sockets 42 and 44 has a media detection terminal (not shown) for detecting whether or not the recording media 46 and 48 are attached, and detection indicating whether the recording media 46 and 48 are attached or not. The signal is input to the CPU 12 via the media I / F circuit 52.
[0036]
The camera 10 also includes a USB communication circuit 54 as a communication means for connecting to a personal computer or other external device. By connecting the camera 10 and an external device using a USB cable (not shown), it is possible to exchange data with the external device. Of course, the communication method is not limited to USB, and IEEE1394, Bluetooth, or other communication methods may be applied. The communication mode for communicating with an external device is automatically set over other modes (still image shooting mode / playback mode / movie mode) when the camera 10 is connected to the external device for communication. Is done.
[0037]
Next, the shooting function of the camera 10 will be described.
[0038]
The camera 10 includes a photographing lens 56 and a CCD solid-state imaging device (hereinafter referred to as CCD) 58. The taking lens 56 may be a single focus lens or a variable focal length such as a zoom lens.
[0039]
When the shooting mode is selected, power is supplied to the image pickup unit including the CCD 58 from a power supply unit (not shown), and the camera is ready for shooting. The light passing through the photographing lens 56 is imaged on the light receiving surface of the CCD 58 after the amount of light is adjusted by a diaphragm mechanism (not shown). A number of photodiodes (light receiving elements) are two-dimensionally arranged on the light receiving surface of the CCD 58, and red (R), green (G), and blue (B) primary color filters are provided corresponding to the photodiodes. They are arranged in a predetermined arrangement structure (Bayer, G stripe, etc.). The CCD 58 has an electronic shutter function for controlling the charge accumulation time (shutter speed) of each photodiode.
[0040]
The CPU 12 sends a command to the driver circuit 62 via the parallel input / output circuit 60 to control the charge accumulation time and charge transfer of the CCD 58. Instead of the CCD 58, another type of image sensor such as a MOS type may be used.
[0041]
The subject image formed on the light receiving surface of the CCD 58 is converted into a signal charge corresponding to the amount of incident light by each photodiode. The signal charge accumulated in each photodiode is sequentially read out as a voltage signal (image signal) corresponding to the signal charge based on a drive pulse given from the driver circuit 62 in accordance with a command from the CPU 12.
[0042]
The signal output from the CCD 58 is sent to the analog processing unit 64, where the R, G, B signals for each pixel are sampled and held (correlated double sampling processing), amplified, and then A / D converter 66 Sent to. The A / D converter 66 converts R, G, B signals that are sequentially input into digital signals and outputs them to the signal processing circuit 68.
[0043]
The signal processing circuit 68 processes the A / D converted digital image data in accordance with a command from the CPU 12. That is, the signal processing circuit 50 includes a synchronization circuit (a processing circuit that converts a color signal into a simultaneous expression by interpolating a spatial shift of the color signal associated with the color filter array of the single CCD), and a luminance / color difference signal generation circuit. In addition to functioning as an image processing unit including a gamma correction circuit, a contour correction circuit, a white balance correction circuit, and the like, the image processing unit functions as an audio processing unit, and processes an image signal and an audio signal using the memory 22 according to a command from the CPU 12.
[0044]
The RGB image data input to the signal processing circuit 68 is converted into a luminance signal (Y signal) and a color difference signal (Cr, Cb signal) by the signal processing circuit 68 and subjected to predetermined processing such as gamma correction. The The image data processed by the signal processing circuit 68 is stored in the memory 22.
[0045]
When outputting the image being captured to the liquid crystal monitor 40, the image data is read from the memory 22 and sent to the display control circuit 70 via the bus 14. The display control circuit 70 converts the input image data into a predetermined display signal (for example, an NTSC color composite video signal) and outputs it to the liquid crystal monitor 40.
[0046]
The image data in the memory 22 is periodically rewritten by the image signal output from the CCD 58, and the image signal generated from the image data is supplied to the liquid crystal monitor 40, so that the image being captured can be monitored in real time. 40. The photographer can check the shooting angle of view from the video (through movie image) displayed on the liquid crystal monitor 40.
[0047]
When the shutter button 34 is pressed and the S1 switch is turned on in the still image shooting mode, the CPU 12 detects this and performs AE and AF control. When the shutter button 34 is fully pressed (S2 = ON), the CPU 12 detects the recording. Start CCD exposure and readout control for capturing images.
[0048]
That is, the CPU 12 performs various calculations such as a focus evaluation calculation and an AE calculation from the image data captured in response to S1 = ON, and controls a lens driving motor (not shown) based on the calculation result to take an image. The lens 56 is moved to the in-focus position, and a diaphragm mechanism (not shown) is controlled. Then, in response to S2 = ON, the charge accumulation time at the time of image acquisition is controlled.
[0049]
The captured image data is subjected to luminance / color difference signal conversion processing (YC processing) and other predetermined signal processing in the signal processing circuit 68 and then sent to the compression / expansion circuit 72, where a predetermined compression format (for example, , JPEG format). The compressed image data is recorded on the recording medium 46 or 48 via the media I / F circuit 52.
[0050]
When the moving image mode is selected by the moving image / still image mode selection operation unit 33, the camera 10 can record a moving image with sound. The recording operation starts when the shutter button 34 is pressed (S2 = ON). When the shutter button 34 is pressed again (S1 = ON), the moving image recording is stopped. Note that the recording operation may be performed while the shutter button 34 is continuously pressed, and the recording may be stopped by releasing the pressing.
[0051]
The sound at the time of moving image shooting is detected by a microphone 74 built in the camera 10, and the detection signal (audio signal) is amplified via an amplifier 76 and converted into a digital signal by an A / D converter 77. To the signal processing circuit 68. The signal processing circuit 68 converts the input audio data into a predetermined signal format. The audio data generated in this way is compressed in the compression / decompression circuit 72 together with the image data, and is recorded on the recording medium 46 or 48 via the media I / F circuit 52. The moving image data is recorded, for example, according to the motion JPEG format.
[0052]
In the motion JPEG method, the image data acquired from the CCD 58 is temporarily stored in the internal memory 22, and then converted into a luminance / color difference signal by the signal processing circuit 68, and JPEG compression is performed within one image, while the external recording medium 46. Alternatively, the still images are continuously stored at a constant frame rate (a preset frame rate) of 48. The file format of the moving image is not limited to motion JPEG, and other file formats such as MPEG may be applied. In the case of the MPEG system, recording is continuously performed on an external recording medium 46 or 48 while performing intra-frame compression and inter-frame compression.
[0053]
When the reproduction mode is selected by the operation means 30, the data of the last image file (last recorded file) recorded on the recording medium 46 or 48 is read. When the file related to the last recording is a still image file, the compressed data of the read image file is expanded to an uncompressed YC signal via the compression / decompression circuit 72, and the signal processing circuit 68 and the display control circuit 70 are expanded. Is converted into a display signal via the, and then output to the liquid crystal monitor 40. As a result, the image content of the file is displayed on the liquid crystal monitor 40.
[0054]
When the reproduction target file is a moving image file, the first frame of the moving image is displayed on the liquid crystal monitor 40 as a representative image, and a screen for accepting an instruction to start moving image reproduction is displayed. When a predetermined operation is performed from the operating means 30 in a state where the first frame of the moving image is displayed and the moving image reproduction is started, the reproduction process of the moving image file starts, the moving image is displayed on the liquid crystal monitor 40, and the signal processing The audio data reproduced in the circuit 68 is output to the speaker 84 via the D / A converter 80 and the amplifier 82, and the audio recorded simultaneously with the moving image is also reproduced.
[0055]
During single-frame playback of a still image (including when the first frame of a moving image is displayed), the file to be played can be switched (forward / reverse) by operating the right key or left key of the cross key. The image file at the frame-advanced position is read from the recording medium 46 or 48, and still images and moving images are reproduced and displayed on the liquid crystal monitor 40 in the same manner as described above.
[0056]
Next, the media selection function in the camera 10 configured as described above will be described.
[0057]
The dual slot type camera 10 capable of mounting the two recording media 46 and 48 at the same time automatically saves the recording medium 46, which is the storage destination, according to the characteristics of the mounted recording media 46 and 48 and the characteristics of the recording data. A media selection function for switching 48 is provided.
[0058]
FIG. 2 shows a flowchart according to a first control example for realizing the media selection function. First, the CPU 12 reads a media detection signal (step S110), and checks whether or not the recording media 46 and 48 are loaded in the media slots 42 and 44 (step S112). If the recording media 46 and 48 are not loaded in either of the two media slots 42 and 44, an error message indicating that the recording media 46 and 48 are not loaded is displayed on the liquid crystal monitor 40 (step S114). ).
[0059]
If it is determined in step S112 that at least one recording medium 46, 48 is loaded, the process proceeds to step S116, and the type of the loaded recording medium is recognized.
[0060]
Next, it is determined whether or not the two types of recording media 46 and 48 are simultaneously mounted (step S118). If the two types of recording media 46 and 48 are simultaneously mounted, the recording capacities of the respective recording media 46 and 48 are confirmed. (Step S120). The CPU 12 accesses the recording media 46 and 48 via the media I / F circuit, and detects the respective free capacities.
[0061]
Thereafter, the CPU 12 determines the recording mode (step S130), and performs control to switch the recording medium 46 or 48 for data recording in accordance with the selected recording mode (steps S140 and S142). That is, when the “moving image mode” is selected by the moving image / still image mode selection operation unit 33, data (this is the reference numeral 48 in this example) of the two recording media 46 and 48 is recorded with data (this In this case, processing for setting a storage destination medium so as to record (moving image data) is performed (step S140).
[0062]
On the other hand, when “still image mode” is selected in the mode determination in step S130, data (in this case, reference numeral 46 in this case) is stored in the medium having a small recording capacity (in this example, reference numeral 46). , Still image data) is recorded (step S142).
[0063]
If it is determined in step S118 that only one type of recording medium 46 or 48 is attached, there is no room for selecting a storage destination, and data is recorded on the attached recording medium 46 or 48. (Step S150).
[0064]
After the data storage destination medium is automatically determined in this way, a shooting operation is executed in response to pressing of the shutter button 34, and the acquired still image data or moving image data is recorded on the automatically determined recording medium 46 or 48. Processing is performed.
[0065]
According to the control example shown in FIG. 2, since a recording medium 48 with a large free space is automatically selected and recorded when recording a moving image, it is possible to record a moving image for a long time.
[0066]
FIG. 3 is a flowchart showing the flow of the moving image shooting process. When the moving image mode is set, the CPU 12 monitors the signal input from the shutter button 34 and determines whether or not the S1 switch is turned on (step S210). When the command of S1 = ON is not input in step S210, the process returns to step S210 and waits for the input of the shooting instruction from the user.
[0067]
When the shutter button 34 is pressed by the user and the S1 switch is turned on in step S210, AE and AF processing is performed (step S212), and the input of S2 = ON is determined (step S214). If it is determined in step S214 that the S2 switch of the shutter button 34 has not been turned on, it is determined whether or not S1 has been released (step S216).
[0068]
If S1 has been canceled in step S216, the process returns to step S210, and the photographing instruction input acceptance state is set. If S1 is not canceled in step S216, the process returns to step S214 and waits for an input of S2 = ON. When the input of S2 = ON is detected in step S214, recording moving image shooting is executed (step S218). That is, exposure and readout processing of the CCD 58 is performed, and processing of the acquired image signal is performed (step S218).
[0069]
During moving image shooting, the CPU 12 monitors the recording capacity (free space) of the recording medium selected as the data storage destination (for example, reference numeral 48 in FIG. 1), and the recording medium 48 has run out of free space (media It is determined whether or not a full state has been reached (step S220).
[0070]
Since there is free space immediately after the start of recording, a NO determination is made in step S220, and the process proceeds to step S222. In step S222, a process of writing moving image data to the selected recording medium 48 is performed.
[0071]
After step S222, the process proceeds to step S230, and the signal input to the S1 switch, which is a recording stop command, is determined. If there is no signal input from the S1 switch in step S230, the process returns to step S218 to continue moving image recording.
[0072]
Eventually, when the recording destination recording medium 48 runs out of free space and no further recording is possible, a YES determination is made at step S220, and processing proceeds to step S224. In step S224, it is determined whether another recording medium 46 is attached to the camera 10. If the two recording media 46 and 48 are loaded at the same time, moving image data is continuously recorded on the remaining recording media 46 (step S226), and moving image shooting is continued.
[0073]
After step S226, the process proceeds to step S230, and the input of an instruction to stop moving image recording from the user is determined. If there is no signal input of S1 = ON in step S230, the process returns to step S218, and moving image shooting is continued.
[0074]
When a signal of S1 = ON is detected in step S230, moving image shooting is terminated (step S232). In step S224, even when another recording medium 46 is not loaded, the process proceeds to step S232 and the moving image shooting is ended.
[0075]
After the end of shooting, the process proceeds to step S234, and it is determined whether or not a moving image is recorded on the two recording media 46 and 48. If divided recording has not been performed, this sequence is terminated (step S250).
[0076]
If it is determined in step S234 that divided recording is being performed, the moving image data recorded separately on these two recording media 46 and 48 is reprocessed and stored on one recording medium (for example, 48). A process for displaying on the liquid crystal monitor 40 a message for inquiring the user as to whether or not to integrate is performed (step S236). When integrating (consolidating) video data, processing to increase the compression rate and reduce the amount of data is performed. Therefore, a message is displayed to notify the user to that effect, and whether the processing is possible or not is displayed. It is now up to the decision.
[0077]
Thereafter, an input operation from the user is accepted while the message is displayed, and the process branches according to the input instruction. In accordance with a predetermined operation procedure, the user performs (1) an OK input that permits the execution of concatenated recording, or (2) inputs an instruction to save only moving image data that has been recorded on one recording medium 48. Or (3) an instruction to delete all of the divided and recorded moving image data can be input.
[0078]
That is, the CPU 12 determines whether or not there is an OK input from the user (step S238), and when the OK input is detected, the CPU 12 increases the compression rate for the moving image data recorded separately on the two recording media 46 and 48. Then, reprocessing is performed, and data acquired by a series of moving image shootings is collected into one moving image file and recorded again on one recording medium 48 (step S240).
[0079]
If NO is obtained in step S238, the process proceeds to step S242, and it is determined whether or not a command for recording a moving image up to the middle is input. If YES is obtained in step S242, the moving image data (first half of the moving image) recorded on the recording medium 48 that was initially selected is stored as it is (without changing the compression ratio), and the recording medium 48 is recorded. The process of deleting the moving image data (the second half of the moving image) recorded on another recording medium 46 continuously after the medium is full is performed (step S244).
[0080]
If NO is obtained in step S242, the process proceeds to step S246, and it is determined whether or not an instruction to delete all of the divided and recorded moving image data is input. If YES is obtained in step S246, a process of deleting the data divided and recorded on both recording media 46 and 48 is performed (step S248). If NO is obtained in step S246, the process returns to step S238 to wait for an input operation from the user.
[0081]
After executing the process according to the user's selection (step S240, S244, or S248), this sequence is terminated (step S250).
[0082]
As described with reference to FIG. 3, when one recording medium 48 runs out of free space during moving image recording, moving image recording is continuously performed on another recording medium 46, and after recording, one moving image data is combined into one moving image data. Since it can be stored in one recording medium 48, it is possible to avoid interruption of moving image shooting accompanying full media, and it is possible to shoot without missing a valuable shooting opportunity.
[0083]
Although FIG. 3 describes the recording of moving images, the same control as in FIG. 3 can be applied to continuous recording of still images in the continuous shooting mode. In other words, when there is no more free space on one recording medium during continuous shooting, recording continues on another recording medium, and after recording, data related to a series of continuous shooting is reprocessed at a high compression rate. Can be collectively stored in one recording medium 48.
[0084]
FIG. 4 is a flowchart according to a second control example for realizing the media selection function. In FIG. 4, steps common to FIG. 2 are denoted by the same step numbers and description thereof is omitted.
[0085]
In the example of FIG. 4, after confirming the recording capacity of each of the recording media 46 and 48 in step S120, the process proceeds to step S131 to determine the image quality mode. The camera 10 can select a combination of recording image quality (compression rate) and recording pixel count (image size) in accordance with the user's shooting purpose. Since the file size of the recording data changes according to the specified recording image quality and the number of recording pixels, there is a lot of free space when a large file size condition (high pixel and low compression rate) is selected. The media is selected and recorded.
[0086]
In other words, when the high image quality mode (“FINE” in this example) is selected in step S131, the process proceeds to step S132 to determine whether or not the number of recording pixels is set to a high pixel. Although the determination criterion of “high pixel” can be set as appropriate, in the present embodiment, for example, it is determined that the pixel is “high pixel” when an image size of 2048 × 1536 (3M) pixels or more is selected. .
[0087]
If YES is obtained in step S131, the process proceeds to step S140, and the storage destination is recorded so that the captured data is recorded on a medium having a large recording capacity (in this example, reference numeral 48) of the two recording media 46 and 48. Processing for setting a medium is performed (step S140).
[0088]
On the other hand, if a relatively low image quality mode (in this example, “NORMAL” or “BASIC”) is selected in step S131 and if a NO determination is obtained in step S132, the process proceeds to step S142. A process of setting a storage destination medium so as to record data on a medium having a small recording capacity (reference numeral 46 in this example) of the two recording media 46 and 48 is performed (step S142).
[0089]
According to the control example shown in FIG. 4, when recording image data having a large file size (low compression and high pixel data), the recording medium 48 having a large free space is automatically selected and recorded. Compared to the case of recording on a small-capacity recording medium 46, a large number of high-quality images can be recorded.
[0090]
FIG. 5 is a flowchart according to a third control example for realizing the media selection function. In FIG. 5, the same steps as those in FIG. 2 are denoted by the same step numbers, and the description thereof is omitted.
[0091]
In the example of FIG. 5, when it is determined in step S118 that the two types of recording media 46 and 48 are loaded at the same time, the process proceeds to step S122, and the recording speed of each recording medium 46 and 48 is confirmed. Since the recording speed varies depending on the types of the recording media 46 and 48, the recording speed can be determined based on the result of the type recognition of the recording media 46 and 48 (step S116).
[0092]
After step S122, the CPU 12 determines the recording mode (step S134), and performs control to switch the recording medium 46 or 48 for data recording in accordance with the selected recording mode (steps S160 and S162). That is, in the mode determination in step S134, when a mode requiring high speed such as “moving image mode” or “continuous shooting mode” is selected, faster data writing is performed between the two recording media 46 and 48. The storage destination medium is set so as to record the image data on a recordable recording medium (in this example, reference numeral 46, which is a semiconductor memory card) (step S160).
[0093]
On the other hand, when a mode that does not require high speed such as “single shooting mode” is selected in step S134, a recording medium with a relatively low recording speed (in this example, a small hard disk) is selected. The storage destination medium is set so as to record the image data in the reference numeral 48) (step S162).
[0094]
FIG. 6 is a flowchart according to a fourth control example for realizing the media selection function. FIG. 6 is a modification of the third control example described with reference to FIG. 5. Steps S152 to S158 (see FIG. 6) are added between step S134 and step S160 in FIG. ing. In FIG. 6, the same steps as those in FIG. 5 are denoted by the same step numbers, and the description thereof is omitted.
[0095]
According to FIG. 6, when a mode requiring high speed such as “moving image mode” or “continuous shooting mode” is selected in the mode determination in step S134, the process proceeds to step S152, and the recording medium 46 having a high recording speed is selected. Is transferred to another recording medium 48 having a large capacity and a low recording speed. In this way, the free space of the recording medium 46 capable of high-speed recording is secured before shooting, and preparations for shooting of moving images and continuous shooting are made.
[0096]
In this case, a warning is displayed so that the user does not attach or detach the recording media 46 and 48 during the transfer process (step S154). Examples of the warning display means include a mode in which a warning message, a warning mark, and the like are displayed on the liquid crystal monitor 40, and a mode in which a warning lamp (not shown) is lit or blinked.
[0097]
The CPU 12 monitors the progress of the transfer process and determines whether or not the transfer process has been completed (step S156). If it is determined in step S156 that the transfer has not been completed, the process returns to step S154, and the warning display state is continued.
[0098]
When transfer completion is confirmed in step S156, the warning display is canceled and photographing is permitted (step S158). Thus, the storage destination medium is set so as to record the image data on the recording medium 48 having a high recording speed (step S160).
[0099]
Note that a mode in which the control examples described in FIGS. 2 to 6 are appropriately combined is possible, and any control method may be selected by the user.
[0100]
The scope of application of the present invention is not limited to the above-described embodiments, and the present invention can also be applied to other information devices having an electronic imaging function such as a mobile phone with camera, a PDA with camera, and a mobile personal computer with camera. In this case, the imaging unit may be a detachable (external type) that is separable from a main body such as a mobile phone.
[0101]
【The invention's effect】
As described above, according to the electronic camera of the present invention, since the recording medium is automatically selected according to the characteristics of the plurality of recording media and the characteristics of the recording data simultaneously mounted on the camera, the user is conscious. Therefore, it is possible to record data by taking advantage of each recording medium. Thereby, the performance of the camera can be sufficiently extracted.
[Brief description of the drawings]
FIG. 1 is a block diagram showing a configuration of an electronic camera according to an embodiment of the present invention.
FIG. 2 is a flowchart showing a first control example for realizing an automatic media selection function;
FIG. 3 is a flowchart showing a flow of moving image shooting processing in the camera of this example.
FIG. 4 is a flowchart showing a second control example for realizing an automatic media selection function;
FIG. 5 is a flowchart showing a third control example for realizing the automatic media selection function;
FIG. 6 is a flowchart showing a fourth control example for realizing the media automatic selection function;
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 ... Camera, 12 ... CPU, 31 ... Image quality mode setting operation part, 32 ... Recording pixel number setting operation part, 33 ... Moving image / still image mode selection operation part, 44 ... Shutter button, 35 ... Continuous shooting mode setting operation part, 40 ... Liquid crystal monitor, 42, 44 ... Media socket, 46, 48 ... Recording medium, 52 ... Media I / F circuit, 58 ... CCD

Claims (4)

An electronic camera that can use a plurality of recording media having different characteristics as a medium for recording image data acquired by photographing,
Characteristic recognition means for recognizing the characteristics of the plurality of recording media simultaneously mounted on the electronic camera;
Setting operation means for setting a recording condition of the data;
Medium selecting means for automatically selecting a recording medium on which the data is to be recorded among the plurality of recording media based on characteristics of each recording medium recognized by the characteristic recognizing means and recording conditions set by the setting operation means; ,
Recording processing means for performing processing for recording the data on the recording medium selected by the medium selecting means;
An electronic camera characterized by comprising: An electronic camera that can record video and still images,
The characteristic recognition means includes capacity detection means for detecting free capacity of the plurality of recording media,
The setting operation means includes mode selection means for switching between a moving image mode for recording a moving image and a still image mode for recording a still image,
The electronic camera according to claim 1, wherein the medium selection unit selects a recording medium so as to record moving image data on a recording medium having a large free space among the plurality of recording media. The characteristic recognition means includes capacity detection means for detecting free capacity of the plurality of recording media,
The setting operation means includes means for setting at least one condition among the number of recording pixels and the compression rate,
The medium selection unit records relatively large size data on a recording medium having a large free space among the plurality of recording media according to the size of data generated according to the recording condition set by the setting operation unit. 2. The electronic camera according to claim 1, wherein the recording medium is selected as described above. The characteristic recognition means includes means for recognizing recording speeds of the plurality of recording media,
The setting operation means includes a mode selection means capable of selecting at least one of a moving image mode for recording a moving image and a continuous shooting mode for continuously recording a still image,
The medium selection unit selects a recording medium so as to record data on a recording medium having a high recording speed among the plurality of recording media when the moving image mode or the continuous shooting mode is selected by the setting operation unit. The electronic camera according to claim 1.

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