JP2008022216A - Device and method for displaying image, program, photographing apparatus with information recorder, and animation recording device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To display still image data according to kinds of color temperature and to classification in chronological order. <P>SOLUTION: Color temperature information of image data is detected in photographing. When the detected color temperature information coincides with the color temperature of the previous image data after comparison, it is determined that the data are continuous scenes, so as to generate a same group number as last time. In the case of noncoincidence, it is determined that the data are noncontinuous scenes so as to generate a new group number. The still group number is embedded in the still image data together with a thumbnail image, and made into a file. Then the obtained image file is preserved. When the data are reproduced, the group numbers are read from each image file, and the thumbnail images are classified into groups 56, based on the group numbers. Each group 56 is arranged in order of the group numbers and displayed in an LCD. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an image display device, an image display method, a program, a photographing device with an information recorder, and a moving image recording device used for an electronic camera, a mobile phone with a camera, and the like.

  Conventionally, it is known that an electronic camera records a still image file containing still image data or a moving image file containing moving image data on a recording medium. Still image files include a format in which thumbnail images obtained by reducing still image data are embedded. When a still image file of this format is reproduced, thumbnails are displayed, so that it is easy to search for a desired still image file. However, when a large number of thumbnail images are displayed, it is not possible to enter one screen, so a page turning operation is required, and it takes time to search.

  When a moving image file is played back, it is difficult to find a desired moving image file because the contents are not understood only by displaying the file name and file creation date of the moving image file.

  Therefore, when playing a movie file, the color temperature is detected from the loaded movie data, and the scene change is determined based on the detected color temperature so that the desired movie file can be easily searched. There is known a moving image processing apparatus and method for creating an index image for each point at which changes, and arranging and displaying the created index images in time series (Patent Document 1). In the present invention, since an index (chapter) image for each scene is generated for one moving image file, the contents of the moving image data can be easily grasped. By examining the color temperature of the image data, the shooting environment such as outdoors (clear sky), fluorescent lamp (indoor), tungsten lamp (indoor lighting), and strobe required (night view, no indoor lighting) can be found.

In addition, an electronic camera is described that detects the color temperature of a captured image, classifies still image files based on the color temperature, and stores them in a recording medium (Patent Document 2). In the present invention, since still image files are classified and displayed for each color temperature, for example, images taken indoors and images taken outdoors can be easily found.
JP 2004-297697 A Japanese Patent Laid-Open No. 10-126738

  However, for example, when there are 10 still image files “A1, A2, A3, A4, B5, B6, B7, A8, A9, A10” (English letters indicate the type of color temperature, and numbers indicate the order of shooting date and time) In the invention described in Patent Document 2, in order to simply classify by color temperature, a first group of “A1, A2, A3, A4, A8, A9, A10” and a second group of “B5, B6, B7” are categorized. However, in such classification display, it is not known that the still image files “B5, B6, B7” of the second group exist temporally between “A4, A8” of the first group. That is, it is not noticed that there is a time difference between “A4 and A8”. For this reason, all the still image files included in the first group may be determined to be a group of images taken at the same place and at substantially the same time.

  Further, in the invention described in Patent Document 1, a frame image at a position where a scene is divided based on color information for each moving image file is displayed as a chapter (index) image in time series. For this reason, the index image of the scene where the color temperature changes is displayed in chronological order, so the contents of the video file are easy to understand, but the file size is large, so video editing such as cutting a part is performed. Has the disadvantage of taking time.

  The present invention has been made in consideration of the above problems, and can display an image display device, an image display method, a program, and information that can classify still image files by color temperature and display them in time series. An object is to provide a photographing apparatus with a recording machine. It is another object of the present invention to provide a moving image recording apparatus devised for easy editing of a moving image file whose contents are known.

  In order to achieve the above object, in the image display device of the present invention, storage means for storing an image file read from a storage medium, and still image data from the storage means are read in order to obtain color temperature information of the still image data. When the color temperature information is substantially the same as the color temperature information of the still image data read out immediately before, the same group number as that assigned to the previous still image data is assigned. If the color temperature information is different, the scene continuity determining means for assigning a new group number, and the thumbnail images corresponding to each image file are grouped based on the group number assigned by the scene continuity determining means. Index display control means for arranging the groups in the order in which they are assigned and displaying a list on the display unit.

  If scene continuity information such as color temperature information or group number is not embedded in the image file, it is necessary to detect the color temperature of the subject based on still image data read from the recording medium. Then, the color temperature information of the still image data is compared with the color temperature information of the still image data read out immediately before. If the color temperature information is substantially the same, the previous still image data is changed to the previous one. If the same group number as the assigned one is given and the color temperature information is different, a new group number may be given.

  In a photographing apparatus with an information recorder, scene continuity information such as color temperature information and group number must be embedded in image data and stored in a recording medium. This apparatus generally includes a white balance detection circuit for correcting white balance. The color temperature information obtained using this white balance detection circuit is stored in the recording means, and the color temperature information based on the still image data captured in response to the shutter release is read out from the storage means in the scene continuity determining means. Compared with the color temperature information of the still image data taken immediately before, when the color temperature information is substantially the same, the same group number as that assigned to the previous still image data is assigned. If the color temperature information is different, a new group number is assigned. If the tag information generating means generates the group number assigned by the scene continuity determining means together with the thumbnail image as tag information, the thumbnail image and the group number can be saved in an image file in a format embedded in the image data. Thereby, thumbnail images can be classified and displayed in a list based on scene changes during reproduction.

  An image display method may be used instead of the image display device. Moreover, it is good also as a program for making 1 or several computer implement | achieve each step of the image display method.

  In the case of a moving image file, when there is a drastic change in a scene, if a chapter image (index image) is created for each scene, the number of chapter images increases, and it takes time to find a desired scene. Therefore, in the moving image recording apparatus of the present invention, color temperature detection means for detecting the color temperature of the still image frame in the shooting order, and scene determination means for determining a scene break based on a change in the color temperature of the still image frame, Each time the scene discriminating unit determines that it is a scene delimiter, a divided file storage unit that stores moving image data in a format in which still image frames up to that time are arranged in time series as a divided file on the recording medium; It is equipped with.

  According to the invention for displaying still image files, the thumbnail images corresponding to each image file are given a group number by comparing the color temperature information of the image data before and after the shooting order, and are grouped based on the group number, Since each group is displayed in a list in the order of generation of group numbers, even image files with the same color temperature are displayed in a time series. Therefore, it is possible to easily search for a desired image file. In addition, according to the moving image recording apparatus that divides moving image data into files based on changes in color temperature, a moving image file is generated for each scene change, so the file size can be reduced. Therefore, editing can be performed easily.

  As shown in FIG. 1, the electronic camera 10 adopting the present invention is provided with a photographing lens 11 and a flash light emission window 12 on the front surface, and a shutter button 13, a power button 14, and a function mode dial 15 on the upper surface. ing. The function mode dial 15 is an operation unit that selects any one of a camera mode, a playback mode, and a menu mode. The camera mode is a mode for recording still images, the playback mode is a mode for playing back recorded still images, and the menu mode is for manually setting values such as white balance, ISO sensitivity, date and time, and color processing. This is the mode to change.

  As shown in FIG. 2, a liquid crystal display unit (LCD) 16, a determination button 17, a tele / wide zoom button 19, a cross button 20, and the like are provided on the back. In the camera and video mode mode, a through image is displayed on the LCD 16 in a shooting standby state. In the playback mode, thumbnail images corresponding to still image files are grouped for each scene continuity, and each group is displayed in a list in time series.

  As shown in FIG. 3, the electronic camera 10 is provided with a diaphragm 22, a photographing lens 23, and a CCD 24. The photographic lens 11 is moved to a position where the focus is optimal when the driving of the lens motor 25 is input. The aperture 22 changes the aperture diameter by driving the iris motor 26. Driving of these motors 25 and 26 is controlled through motor drivers 28 and 29 connected to the CPU 27.

  The CCD 24 captures a subject image formed by the photographing lens 11. A timing generator (TG) 30 controlled by the CPU 27 is connected to the CCD 24, and the shutter speed of the electronic shutter is determined by a timing signal (clock pulse) input from the TG 30.

  An imaging signal obtained from the CCD 24 is input to the CDS / AMP 31. The CDS is a correlated double sampling circuit, and outputs R, G, B image data that accurately corresponds to the accumulated charge amount of each cell of the CCD 24. AMP is an amplifier. The amplified image data is converted into a digital signal by the A / D converter 32.

  The image input controller 33 is connected to the CPU 27 via the bus 34 and controls the CCD 24, the CDS / AMP 31, and the A / D converter 32 in accordance with a control command from the CPU 27. Image data output from the A / D converter 32 is output at predetermined intervals and stored in the memory 35. The memory 35 is provided with an image memory for storing image data. The image data read from the image memory is sent to the LCD driver 36 and displayed on the LCD 16 as a through image. The memory 35 is provided with a work memory in addition to the image memory.

  The image signal processing circuit 38 performs various image processing such as white balance (WB) correction and γ correction processing on the image data. The image data that has been subjected to various processes by the image signal processing circuit 38 is converted into a luminance signal Y and color difference signals Cr and Cb by a YC conversion processing circuit 39. The compression / decompression processing circuit 40 performs image compression on the converted image data in a predetermined compression format (for example, JPEG format). The compressed image data is recorded as a still image file on the memory card 42 as a recording medium via the media controller 41. The memory card 42 may be removable from the camera body.

  In the still image file, tag information such as shooting date / time information, thumbnail images obtained by reducing the image data, and information indicating scene continuity (hereinafter referred to as “scene continuity information”), which will be described later, is written in the tag area. It is in a file format with image data.

  In the playback mode, thumbnail images of each image data stored in the memory card 42 are read, and an index image displaying a list of thumbnail images is displayed on the LCD 16. When a desired thumbnail image is selected from the index image screen, the corresponding image data is read from the memory card 42 to the compression / decompression processing circuit 40, and after being decompressed by the compression / decompression processing circuit 40, the selected image is selected on the LCD 16. The image is enlarged.

  In addition to the operation unit described above, a ROM 45 is connected to the CPU 27. The ROM 45 stores various control programs and setting information. The CPU 27 reads out this information from the ROM 45 to the memory 35 and executes various processes.

  The bus 34 includes an AF detection circuit 46 for detecting whether or not the focusing position of the photographing lens 11 is appropriate, and proper exposure, that is, the shutter speed of the electronic shutter of the CCD 24, photographing sensitivity, and the aperture value of the diaphragm 22. Are connected to an AE detection circuit 47 for detecting whether or not the image is appropriate for shooting and an AWB detection circuit 48 for detecting whether or not the white balance correction is appropriate for shooting. Each of the detection circuits 46 to 48 sequentially transmits the detection result to the CPU 27 via the bus 34. The CPU 27 individually controls the operations of the photographing lens 11, the aperture 22, the CCD 24, and the like based on the detection results transmitted from the detection circuits 46 to 48.

  The AE detection circuit 47 calculates an appropriate exposure value based on the luminance information of the image data stored in the memory 35 at predetermined intervals. These pieces of information are sent to the CPU 27, and the CPU 27 continuously controls the electronic shutter and the aperture 22 based on the obtained information.

  The camera 10 employs a continuous auto white balance (CAWB) system in which white balance is always corrected without half-pressing the shutter button 13. The AWB detection circuit 48 calculates an integrated value for each color of the R, G, and B signals of the image data for one screen stored in the memory 35 and stores it in the memory 35. The CPU 27 calculates the ratio R / G, B / G of the integrated values for each color based on the integrated data of the R, G, B signals stored in the memory 35. Next, the CPU 27 determines the type (or color temperature) of a light source that illuminates a subject such as daylight, a fluorescent lamp, or a tungsten light source based on the calculated ratios R / G and B / G. .

  The CPU 27 determines a WB correction value (WB gain) for each of RGB colors corresponding to the specified light source. The image signal processing circuit 38 performs WB correction on the image data captured via the CCD 24 and the A / D converter 32 based on the determined WB correction value. Further, the CPU 27 stores in the memory 35 the color temperature information of the image data captured in response to the shutter release. This color temperature information is used for scene continuity determination.

  In the present invention, the method for determining the type of color temperature (light source) is not limited to the method described above. As another method, for example, the imaging area is divided into a plurality of areas, color information is acquired for each area, the color temperature for each area is obtained, and the color temperature of the entire image is determined from the number of areas for each color temperature. There is a way to do it. A detection frame indicating a range of color distribution corresponding to various light sources is set in advance on a graph in which the horizontal axis is R / G and the vertical axis is B / G. Then, based on the calculated ratios R / G and B / G of the average integrated values of the divided areas, the number of divided areas that enter the detection frame is obtained. There is also a method of determining the color temperature (type of light source) based on the number of areas that fall within this detection frame.

  The AF detection circuit 46 performs focus control by a contrast detection method. In addition, the camera 10 employs a continuous auto focus (CAF) function that always focuses even when the shutter button 13 is not half-pressed. This function includes an AF detection circuit 46 and a CPU 27. The AF detection circuit 46 extracts the image components of the focus evaluation area from the memory based on one or more focus evaluation areas (AF areas) set in advance to evaluate the focus state of the image, The contrast value of the image is obtained based on the image component of the focus evaluation area, the in-focus state of the image is determined based on the obtained contrast value, the in-focus position of the focus lens is specified, and the lens for the CPU 27 is determined. Sends a control signal for driving. That is, the AF detection circuit 46 evaluates the contrast of the subject image obtained through the photographing lens 11 while moving the focus lens, and determines the focus position based on the contrast evaluation value. The CPU 27 drives the lens motor 25 based on the in-focus position, and moves the focus lens to an optimal position.

  When image data is filed and stored in the memory card 42 in response to the shutter release, the CPU 27 collects tag information such as shooting date / time information, thumbnail information, and scene continuity information, and stores these tag information in the tag area. Is stored in one file format together with the image data. As this file format, for example, a file format of Exif (registered trademark) (Exchangeable Image File Format) can be used. This file format can record image data such as TIFF or JPEG format and additional information such as information of the image data and shooting date and time, as well as thumbnail images.

  A calendar circuit 50 is connected to the CPU 27, and photographing date / time information is generated based on information from the calendar circuit 50. The CPU 27 refers to the calendar circuit 50 in response to the shutter release, acquires the date information (shooting date information) at that time, and stores it in the memory 35.

  The thumbnail image is created by a thumbnail image creation unit 51 provided in the CPU 27. The thumbnail image creating unit 51 creates a thumbnail image reduced based on the image data captured in response to the shutter release, and stores the thumbnail image in the memory 35.

  The scene continuity information is generated by a scene continuity determination unit 52 provided in the CPU 27. The scene continuity determination unit 52 compares the color temperatures of the image data captured immediately before and the current image data captured in response to the shutter release, and if different, information indicating a discontinuous scene is abbreviated. If it is determined that they are the same, information representing a continuous scene is generated. The scene continuity information is stored in the memory 35. The color temperature of the image data captured in response to the shutter release is acquired from the AWB detection circuit 48.

  Judgment of color temperature (type of light source) includes, for example, strobe environment (3000 ° K or less), Langsten lamp environment (3200-3400 ° K), fluorescent light environment (4200-4500 ° K), and sunlight environment It is determined whether the environment is one of the environments such as (5500 degrees K or more). Whether or not the color temperature is the same is determined for each kind of environment. The type of environment is not limited to the number described above, and may be classified more finely.

  As the scene continuity information, a group number indicating whether or not the scene is a continuous scene is given. As the group number, for example, a symbol / symbol or character is used. If it is a continuous scene, the same group number as the previous one is given, and if it is a discontinuous scene, a new group number is given. In this case, the generated group number may be overwritten in the memory 35. In this way, since a new group number is assigned to image data having a change in color temperature with respect to the previous image data, a large number of thumbnail images are displayed for each scene continuity when an index image is displayed during playback. By arranging the groups in the order in which the group numbers are assigned, the groups can be displayed in chronological order.

  The tag information creation unit 53 reads tag information to be embedded in the image data from the memory 35 and creates information to be written in the tag area of the image file. In addition to the thumbnail image, shooting date / time information, and color temperature information generated this time, the memory 35 also stores color temperature information for the previous image data saved. After saving the image file in which the collected tag information is embedded, the tag information creation unit 53 deletes the currently created thumbnail image, shooting date / time information, and previous color temperature information from the memory 35. The tag information collection unit 54 collects tag information by reading an image file stored in the memory card 42 during reproduction. The index display control unit 55 creates an index image based on the tag information and controls to display the created index image on the LCD 16.

  When shooting, the function button 15 is turned on after setting the function mode dial 15 to the camera mode position. Then, the taking lens 11 is extended from the storage position stored in the body to the wide end position, and the operation of each part in the camera is started. Thereby, the subject light incident through the aperture 22 and the photographing lens 11 is photoelectrically converted by the CCD 24, sampled and amplified by the CDS / AMP 31, and converted into digital data by the A / D converter 32.

  The digitally converted image data is stored in the memory 35 via the image input controller 33 and displayed on the LCD 16 as a through image. All or part of the image data stored in the memory 35 is captured by the AE detection circuit 47, the AF detection circuit 46, and the AWB detection circuit 48, respectively, and exposure, autofocus, and white balance corrections are performed. Done.

  As shown in FIG. 4, the CPU 27 fetches the shooting date / time information and the color temperature information at that time from the calendar circuit 50 and the AWB detection circuit 48 in response to the shutter release, and stores the shooting date / time information and the color temperature information in the memory 35. To do. Further, the thumbnail image creation unit 51 creates a thumbnail image reduced based on the image data captured in response to the shutter release, and stores the thumbnail image in the memory 35.

  Thereafter, the scene continuity determination unit 52 reads the color temperature information of the previous image data and the color temperature information of the image data acquired this time from the memory 35 and compares them with each other, and the types of the light sources are different from each other. Information indicating a new group number is generated, and when it is determined that the types of light sources are the same, information indicating the same group number assigned to the previous image data is generated. These scene continuity information is also stored in the memory 35.

  After generating the scene continuity information, the tag information generation unit 53 reads the shooting date / time information, the scene continuity information, and the thumbnail images from the memory 35, and creates tag information in a form in which these are collected. The CPU 27 creates an image file in a format in which the created tag information is embedded in the image data, and stores the created image file in the memory card 42.

  For example, when it is detected that the first captured image data is the color temperature of sunlight, the start number “A” of the group numbers is assigned to the image file as scene continuity information. Next, when the photographed image data is also the color temperature of sunlight, the same group number “A” is added to the image file. Next, when the photographed image data is the color temperature of the fluorescent lamp, a new group number “B” is added to the image file. Next, when the photographed image data is again the color temperature of sunlight, a new group number “C” is added to the image file. As described above, if the color temperature is the same as that of the previous image data, the same group number as the previous one is given, and if different, the new group number is given.

  In order to reproduce the image file stored in the memory card 42, the power button 14 is turned on after the function mode dial 15 is set to the position of the reproduction mode. Then, as shown in FIG. 5, the tag information collection unit 54 reads the image file stored in the memory card 42 and collects tag information from each image file. The collected tag information is stored in the memory 35.

  After collecting the tag information, the index display control unit 27 reads out the group number and the thumbnail number associated therewith from the memory 35, groups the thumbnail images based on the group number, classifies them, and classifies them. An index image in which the created groups are arranged in ascending order of group numbers is created, and the created index image is displayed on the LCD 16.

  Thereby, as shown in FIG. 6, the thumbnail images A1 to A7, B1 to B3, C1 to C4, D1 and D2 are displayed side by side in the group frame 56 on the LCD 16. The group frame 56 is created according to the number of group numbers. The thumbnail images A1 to A7, B1 to B3, C1 to C4, D1 and D2 displayed in the group frame 56 are arranged in order of shooting date and time. In this case, the downward direction of the screen of the LCD 16 is the time series direction of the group frame 56. The thumbnail images A1 to A7, B1 to B3, C1 to C4, D1 and D2 displayed in the group frame 56 are preferably arranged in time series in a direction different from the downward direction, for example, rightward. . In FIG. 6, the group number is shown in English. The alphabetic characters “A”, “B”, “C”, and “D” described in the thumbnail image are the alphabetic characters corresponding to the group numbers, and are in the order in which the alphabetic characters are assigned, that is, in the order of time series. The number given after the letter indicates the order of shooting date and time.

  In the above embodiment, the thumbnail images are classified based only on the group number. Instead, the thumbnail images are classified roughly according to the shooting date, and the thumbnail images classified according to the shooting date are classified based on the group number. It may be grouped. In this case, as shown in FIG. 6, the shooting date 57 is first displayed on the left side of the screen of the LCD 16, and thumbnail images having the same shooting date are grouped based on the group number. In this case, the shooting date / time information is first acquired at the time of reproduction, the thumbnail images are classified by shooting date, and the classified thumbnail images are classified based on the group number.

  When searching for an image file of a desired shooting date, the vertical scroll bar 58 displayed on the right side of the screen of the LCD 16 is moved vertically by operating the upper and lower buttons of the cross button 20 to sequentially display the next page. can do. Based on the position of the vertical scroll bar 58 relative to the moving range, it can be determined whether there is a next page and another shooting date.

  Any one of the thumbnail images displayed on the screen of the LCD 16 is surrounded by a selection frame 59. By moving the selection frame 59 to a desired thumbnail image with the left and right buttons and operating the decision button 17, the desired image data is enlarged and displayed on the LCD 16.

  In the above embodiment, a TV camera, an image recorder that records image data captured by the TV camera, and an electronic camera that includes an image display that displays image data recorded by the image recorder are described. In the present invention, the present invention is not limited to this, and the TV camera and the image recorder may be omitted, and only the image display (image display device) may be configured.

  The image display device reads an image file stored in a recording medium and displays it on an LCD or a monitor. In this case, some image files stored in the recording medium do not have scene continuity information written therein. Therefore, as shown in FIG. 7, the image display device 60 is provided with a color temperature detection circuit 61 and a scene continuity information creation unit 62. The color temperature detection circuit 61 detects the color temperature based on the read image data and outputs it as color temperature information. The scene continuity information creation unit 62 creates a list of scene continuity information for each image data based on the obtained color temperature information. The same components as those described with reference to FIG. A monitor may be used instead of the LCD 16. Further, a display unit such as the LCD display unit 14 LCD23 or a monitor may be provided separately from the image display device via a connection line.

  A large number of image files are stored in the memory card 42. When a reproduction instruction is input from the operation unit to the CPU 27, the tag information collection unit 54 reads an image file from the memory card 42, acquires tag information such as thumbnail images and shooting date / time information, and stores them in the memory 35. Here, if the tag continuity information is described in the tag information, that information is used. When the scene continuity information is not described in the tag information, the read image data is taken into the color temperature detection circuit 61 to detect the color temperature of the subject to obtain the color temperature information. The scene continuity determination unit 52 compares the color temperature information between the image data before the reading order and the image data read out next, and creates scene continuity information of each image data. Then, after creating the scene continuity information, the index display control unit 55 groups the thumbnail images by the group number that is the scene continuity information, and arranges each group in time series (in order of shooting date and time). An index image is created, and the created index image is displayed on the LCD 16. Here, the reading order is the order based on the shooting date / time information, and the image files are generally given file names that are in the order based on the shooting date / time. For this reason, generally, if the image files are read in the order of the image files, they can be read in the order of shooting date and time. In this example as well, thumbnail images may be classified roughly based on the shooting date and based on the group number.

  Further, the present invention is not limited to the image display device described above, and may be an image display method that constitutes the steps (steps) described above. Furthermore, it is good also as a program for making each step of an image display method implement | achieve one or several computers. In this case, the tag information collection unit 54, the scene continuity determination unit 52, the scene continuity information creation unit 62, the index display control unit 55, and the like are stored in a storage medium such as a CD (compact disc). It is realized by a program that is installed from a drive to an HD (hard disk) or the like and executed by the CPU.

  In each of the above embodiments, an apparatus and a method for recording or displaying a still image file have been described. In the embodiments described below, a moving image recording apparatus for recording a moving image file will be described. In this embodiment, in order to facilitate browsing of a large amount of moving image data, when moving images are captured, scene continuity is detected with reference to color temperature information of the frame image, and a frame image that is a discontinuous scene is detected. The video file is divided and saved in front of the frame image. That is, the moving image file is automatically divided and stored for each scene continuity unit based on the color temperature information.

  The electronic camera 70 shown in FIG. 8 is provided with a video mode on a function mode selection dial. In the video mode, image data (frame image) is taken into the image signal processing circuit 38 via the image input controller 33. The same components as those described in FIG. 3 are denoted by the same reference numerals, and detailed description thereof is omitted here.

  The RGB image data input to the image signal processing circuit 38 is converted into a luminance signal (Y signal) and a color difference signal (Cr, Cb signal) by a YC conversion processing circuit 39, and predetermined processing such as gamma correction is performed. Applied. The image data processed by the YC conversion processing circuit 39 is stored in the memory 35.

  When outputting the captured image to the LCD 16, the image data is read from the memory 35 and sent to the LCD driver 36 via the bus 34. The LCD driver 36 converts the input image data into a predetermined display signal (for example, an NTSC color composite video signal) and outputs it to the LCD 16. As a result, the image being captured is displayed on the LCD 16 in real time as a through image.

  While the through image is displayed, the AE detection circuit 47, the AF detection circuit 46, and the AWB detection circuit 48 operate. Thereby, the aperture value and the shutter speed are determined, and the CPU 27 controls the electronic shutter of the CCD 24 and the aperture 22 to obtain an appropriate exposure amount, and the white balance correction amount to be corrected by the image signal processing circuit 38. Get. Further, the motor driver 28 is controlled to move the photographing lens 11 to the in-focus position.

  Pressing the shutter button 13 starts recording, and pressing it again stops recording. When recording is started, image data that is sequentially captured is stored in the memory 35.

  The Y / C signal stored in the memory 35 is compressed according to a predetermined format by the compression / decompression processing circuit 40, and the compressed moving image file is recorded on the memory card 42 via the media controller 41. The moving image file is opened during recording, and is compressed and stored by a predetermined amount. Then, in response to the recording stop operation, the file is closed and the moving image file is completed. As a format of this moving image file, for example, it is recorded in the motion JPEG format.

  In the motion JPEG method, image data acquired from the CCD 24 is temporarily stored in the internal memory 35, and then converted into luminance / color difference signals (Y / C signals) by the YC conversion processing circuit 39, and JPEG compression is performed within one image. However, still images are continuously stored in the memory card 42 at a constant frame rate (for example, 30 frames / second).

  The file format 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 the memory card 42 while performing intra-frame compression and inter-frame compression. When recording to the memory card 42, the recording may be performed in the internal memory 35 until the recording is completed, and may be stored in the memory card 42 after the recording is completed, or the recording may be recorded on the memory card 42 while recording. It may be a record.

  The CPU 27 is provided with a scene continuity determination unit 71, a file switching control unit 72, and a thumbnail image creation unit 73. As shown in FIG. 9, the scene continuity determination unit 71 captures image data in units of frames during recording, determines the color temperature based on the color information of the image data, and stores the color temperature information in the memory 35. Then, the color temperature information stored in the memory 35 is compared with the color temperature of the next captured image data. If the color temperature information is the same, it is determined that the scene is a continuous scene. Is determined to be a discontinuous scene.

  This determination information is sent to the file switching control unit 72. The file switching control unit 72 continuously stores the moving image file by acquiring information indicating that the scene is a continuous scene. When information indicating that the scene is a discontinuous scene is acquired, the file stored continuously is closed, a new file is opened, and the image data (frame image) determined to be a discontinuous scene is used. Save to new file continuously. As a result, the moving image files automatically divided in accordance with the scene change are sequentially created in the memory card 42.

  The thumbnail image creation unit 73 creates a thumbnail image (chapter image) reduced based on the first image data recorded and the image data determined to be a discontinuous scene. The created thumbnail image is stored in the memory card 42 in association with the moving image file to be divided and stored. For this reason, when playing back a moving image file, the moving image file divided for each scene change is displayed as a thumbnail image. Instead of displaying with thumbnail images, file names and icon images may be displayed.

  In the above embodiment, the electronic camera using the moving image recording apparatus is described. However, the present invention is not limited to the electronic camera, and an imaging unit (television camera) and an image display are omitted, and a moving image recording device (moving image) (Recording device) only, or an image display device and a moving image recording device (moving image recording device) may be provided without the imaging means (television camera). Moreover, it is good also as a moving image recording method which comprises the step (process) demonstrated above. Moreover, it is good also as a program for making each of these steps implement | achieve one or several computers.

It is a perspective view which shows the electronic camera which employ | adopted this invention. It is a perspective view which shows the back side of the electronic camera demonstrated in FIG. It is a block diagram which shows the structure of an electronic camera roughly. It is a flowchart figure which shows the imaging | photography operation | movement with an electronic camera. It is a flowchart figure which shows reproduction | regeneration operation | movement with an electronic camera. It is explanatory drawing which shows the index image displayed on LCD at the time of reproduction | regeneration. It is a block diagram which shows the electrical outline of an image display apparatus. It is a block diagram which shows roughly the structure of the electronic camera which divides | segments a moving image according to a discontinuous scene. It is a flowchart which shows operation | movement of the electronic camera demonstrated in FIG.

Explanation of symbols

10 Electronic Camera 11 Shooting Lens 16 LCD
48 WAB detection circuit (white balance detection circuit)
52 Scene Continuity Discrimination Unit 55 Index Display Control Unit 56 Group Frame 62 Scene Continuity Information Creation Unit

Claims (7)

In an image display device that reads an image file in a format in which still image data is embedded with color temperature information and a thumbnail image for displaying the reduced still image data in a reduced size from a storage medium, and displays the thumbnail images as a list on a display unit ,
Storage means for storing an image file read from the storage medium;
When still image data is read from the storage means in order, and the color temperature information of the still image data is substantially the same as the color temperature information of the still image data read out one time before Is assigned the same group number as that given to the previous still image data, and when the color temperature information is different from each other, a scene continuity determining means for giving a new group number;
Index display control means for grouping thumbnail images corresponding to each image file based on the group number assigned by the scene continuity determination means, and arranging the groups in the order in which the group numbers are assigned and displaying the list on the display unit,
An image display device comprising: In an image display device that reads an image file in a format in which a thumbnail image for displaying the reduced still image data is embedded in still image data from a storage medium, and displays a list of the thumbnail images on a display unit.
Storage means for storing an image file read from the storage medium;
Color temperature detection means for sequentially reading still image data from the storage means, detecting the color temperature of the subject for each read still image data, and sending color temperature information;
The color temperature information of the still image data is compared with the color temperature information of the still image data read out immediately before. If the color temperature information is substantially the same, it is given to the previous still image data. The same group number, and when the color temperature information is different from each other, a scene continuity determining means for assigning a new group number;
Index display control means for grouping thumbnail images corresponding to each image file based on the group number assigned by the scene continuity determination means, and arranging the groups in the order in which the group numbers are assigned and displaying the list on the display unit,
An image display device comprising: An imaging unit that images a subject to generate still image data, a white balance detection unit that detects a color temperature of the subject based on the still image data, and a reduction of the still image data in order to perform white balance correction In a photographing apparatus with an information recorder, comprising: an image file in a format in which tag information including a thumbnail image for display is embedded in the still image data, and storage means for storing the image file in a recording medium;
Storage means for storing color temperature information detected by the white balance detection means in response to a shutter release;
In order to classify and display the thumbnail images based on scene changes during playback, color temperature information based on still image data captured in response to a shutter release is read from the storage means. Compared with the color temperature information of the previously captured still image data, if the color temperature information is substantially the same, the same group number as that assigned to the previous still image data is assigned, and When the color temperature information is different from each other, the scene continuity determining means for assigning a new group number,
A photographing apparatus with an information recording machine, comprising: tag information generating means for embedding the group number assigned by the scene continuity determining means in the tag information together with the thumbnail image. An image display method for reading an image file in a format in which tag information including a thumbnail image for displaying color temperature information and a thumbnail image for reducing a captured image is embedded from the storage medium, and displaying the thumbnail images as a list on a display unit In
Collecting the tag information and associating the collected tag information with the image file and storing them in a storage means;
The scene continuity determining means sequentially reads out the image data from the storage means, and the color temperature information of the image data is substantially the same as the color temperature information of the image data read out one before. The same group number as that given to the previous image data is given, and if the color temperature information is different from each other, a new group number is given,
The index display control means groups thumbnail images corresponding to each image file based on the group number assigned by the scene continuity determination means, arranges the groups in the order in which the group numbers are assigned, and displays the list on the display unit; ,
An image display method comprising: In an image display method of reading an image file in a format in which a thumbnail image for displaying still image data in a reduced size is embedded in still image data from a storage medium, and displaying a list of the thumbnail images on a display unit,
Storing the image file read from the storage medium in a storage means;
A step in which color temperature detection means sequentially reads still image data from the storage means, detects the color temperature of a subject for each read still image data, and sends out color temperature information;
The scene continuity determining means compares the color temperature information of the still image data with the color temperature information of the still image data read one time before. Assigning the same group number to that of the still image data, and assigning a new group number when the color temperature information is different from each other;
The index display control means groups thumbnail images corresponding to each image file based on the group number assigned by the scene continuity determination means, and arranges the groups in the order in which the group numbers are assigned and displays the list on the display unit as a list. When,
An image display device comprising:   A program for causing one or more computers to realize each step of the image display method according to claim 4 or 5. In a moving image recording apparatus that records moving image data in a format in which a plurality of still image frames are arranged in time series in a moving image file and recorded on a recording medium,
Color temperature detecting means for sequentially detecting the color temperature of the still image frame;
Scene discriminating means for discriminating a scene break based on a change in color temperature of the still image frame;
Each time the scene determination means determines a scene break, divided file storage means for storing moving image data in a format in which still image frames before that are arranged in time series as a divided file on the recording medium;
A moving image recording apparatus comprising:

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