JP2006333216A - Image reproducing apparatus, image reproducing method and control program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an image reproducing apparatus capable of quickly and easily extracting a desired still picture from a reproduced series of moving pictures. <P>SOLUTION: A picture acquisition button is pressed down when an operator determines that the desired still picture arrives while reproducing a magnetic tape in a reproduction mode, and still pictures arriving before and after the picture acquired at that time with the picture as reference are extracted at each optional time interval and displayed on a multi-screen. The optional time interval is set so as to become gradually longer as the optional time interval becomes far from the still picture of the reference, and the time interval is configured to be changeable in accordance with the number of times of operating up/down buttons 41 and 42. The up/down buttons 41 and 42 are operated to change an time interval of a picture to be displayed, pictures close to the desired still picture are detected and selected, and narrowing down is further carried out to find the desired still picture which a user wants to store in a memory card 25. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an image reproducing apparatus such as a video camera, an image extracting method thereof, and a control program for realizing the image extracting method.

  Conventionally, some video cameras have a function of capturing a frame image (still image) from a moving image recorded on a magnetic tape (still image capture function). This still image capture method using the still image capture function is to capture a still image at the timing when the capture button is pressed during playback of a moving image recorded on a magnetic tape.

There has also been proposed an image reproducing apparatus that extracts a desired still image from moving images taken for a long time (see, for example, Patent Document 1). This image reproducing apparatus has an image dividing function for dividing the entire recorded video into two or more groups and a display function for displaying a still image. That is, the first image is displayed when the entire moving image is divided into nine at an arbitrary time during the reproduction of the moving image, and further, when the divided image is selected, the image divided into nine at a predetermined time series is redisplayed. . This operation is repeated to extract a desired still image.
JP 2003-333537 A

  However, the conventional still image capture function captures a still image at the timing when the capture button is pressed during playback of a moving image. For example, in a fast-moving scene, the timing may be shifted. It is difficult to capture.

  In addition, although the extraction method for dividing an image is effective in the device of Japanese Patent Application Laid-Open No. H10-260260, it is detected to which group of divided image groups a desired still image belongs during an initial search. However, it takes a lot of time to extract a desired still image.

  In view of the above-described conventional problems, the present invention provides an image reproducing apparatus, an image extracting method thereof, and a control program capable of quickly and easily extracting a desired still image from a series of reproduced moving images. For the purpose.

  In order to achieve the above object, the present invention achieves the above-described object by reproducing means for reproducing a moving image, reference image extracting means for extracting a reference still image from a series of moving images reproduced by the reproducing means, and the reference still image. Peripheral image extraction means for extracting still images around the image at arbitrary time intervals, display control means for displaying the reference still image and the peripheral still images on a display screen, and changing the time interval And changing means.

  The present invention also relates to an image extraction method for an image reproducing apparatus for reproducing a moving image, wherein a reference image extracting step for extracting a reference still image from a series of reproduced moving images, and the reference still image A peripheral image extracting step for extracting a still image of the periphery thereof at every arbitrary time interval, a display control step for displaying the reference still image and the peripheral still image on a display screen, and a change for changing the time interval And a selection step of selecting a predetermined image from the images displayed on the display screen by the display control step, and an image output step of outputting the image selected in the selection step. To do.

  The present invention also provides a computer-readable control program for executing an image extraction method of an image reproduction apparatus for reproducing a moving image, wherein a reference still image is extracted from a series of reproduced moving images. A reference image extracting step for extracting, a peripheral image extracting step for extracting a peripheral still image from the reference still image at an arbitrary time interval, and displaying the reference still image and the peripheral still image on a display screen A display control step for changing, a changing step for changing the time interval, a selection step for selecting a predetermined image from images displayed on the display screen by the display control step, and an image selected in the selection step And an image output step for outputting.

  According to the present invention, it is possible to quickly and easily extract a desired still image from a series of reproduced moving images.

  DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of an image reproduction device, an image extraction method thereof, and a control program according to the present invention will be described with reference to the drawings.

[First Embodiment]
<Device configuration>
FIG. 1 is a block diagram showing a configuration of an image reproduction apparatus according to the first embodiment of the present invention.

  This image reproduction device is a device that reproduces video signals of a video camera, for example, and includes a system control unit 11, an operation unit 12, a signal processing unit 13, a display unit 14, a reproduction unit 15, a tape drum mechanism 21, and a mechanism control unit. 22 is provided. The system control unit 11 controls the operation of the entire apparatus, and includes a CPU 11a, a ROM 11b storing a control program executed by the CPU 11a, and a RAM 11c serving as a work area for the CPU 11a.

  The operation unit 12 is a user interface for a user to input various instructions to the system control unit 11, and various operation buttons such as an image capture button 12a are arranged. The image capture button 12a is an operation button for extracting a desired still image from a video signal (moving image) being reproduced and recording it on a recording medium 25 such as a memory card.

  In the reproduction mode, the signal processing unit 13 processes the video signal reproduced from the storage medium 20 such as a magnetic tape and displays it on the display unit 14. The reproduction unit 15 includes a magnetic head for reproducing a video signal magnetically recorded on the magnetic tape 20, a reproduction processing circuit for reproducing the output of the magnetic head, a storage device for temporarily storing the output of the reproduction processing circuit, It is composed of an expansion circuit for expanding reproduction data (compressed video signal) from the apparatus.

  The tape drum mechanism 21 includes a traveling system of the magnetic tape 20 and a rotary drive system of a rotary drum provided with a magnetic head. The mechanism control unit 22 controls the tape drum mechanism 21 under the control of the system control unit 11.

  The recording medium 20 can be a magnetic disk, an optical disk, a magneto-optical disk, or the like instead of a magnetic tape. In addition, the moving image applied to the present embodiment is, for example, image data that conforms to the MPEG (Moving Picture Experts Group) standard.

<Operation of First Embodiment>
Next, the operation of the image reproducing apparatus according to the present embodiment configured as described above will be described with reference to FIG. FIG. 2 is a flowchart showing an operation according to the first embodiment of the present invention, and the CPU 11a reads a control program based on this flow from the ROM 11b and executes it.

  First, in the playback mode, when the video signal recorded on the magnetic tape 20 is being played back on the screen of the display unit 14 (step S101), when the operator determines that a desired still image has arrived, the image capture button 12a. Is pressed (step S102). In response to this, the system control unit 11 stops the reproduction of the moving image from the magnetic tape 20, extracts a reproduction image at the timing when the image capture button 12a is pressed, and extracts the reproduction image as shown in FIG. The image 30 added with the condition determination display by the “OK” button 31 and the “Re-select” button 32 is displayed on the entire screen of the display unit 14 (step S103). The extracted reproduced image (still image) is read from one frame of reproduced data reproduced from the magnetic tape 20 and held in a buffer memory (not shown) and displayed.

  Thereafter, when the operator determines that the extracted image is to be saved and selects the “OK” button 31 (step S104), the system control unit 11 advances the processing to step S114 described later. On the other hand, when it is determined that the operator does not save the extracted image, that is, when it is determined that the image other than the extracted image is to be searched again and the “Re-select” button 32 is selected (step S104), the magnetic tape 20 The moving image is reproduced and the reproduction data before and after the reproduction image extracted in step S103 is accumulated in a buffer memory (not shown), and the still images before and after the extraction image are extracted from the extraction image at arbitrary time intervals. The screen of the display unit 14 is switched to the multi-screen display to be displayed (step S105).

  Here, this multi-screen display will be described. The multi display screen is a screen that displays a predetermined number of reduced still images. In the present embodiment, an example using a multi-screen will be described. However, the display form of the extracted still image is not limited to the multi-screen, and a plurality of still images are selectively displayed on separate screens. Also good.

  In the multi-screen display, as shown in FIG. 4, the extracted image is displayed as a reference still image A so as to be arranged at the center of the display image group. Further, the previous images (1) to (4) and the subsequent images (1) to (4) are based on the image A as shown in FIG. 5, and the previous images (4), (3), The images are displayed in the order of (2) and (1), and are displayed in the order of the subsequent images (1), (2), (3), and (4) in the direction that advances as time.

  The interval of the extraction time between these images is not fixed, but increases stepwise such as 0.1 s, 0.5 s, 1.0 s, and 3.0 s as shown in FIG. Is set to That is, the image is extracted with a larger time difference as the image is farther from the reference still image A. The reason why such a method is adopted is as follows. In other words, if the method is to extract images at regular intervals, the extraction operation must be repeated many times in the case of a slow-moving scene. This is because a desired still image can be quickly extracted even in a slow-moving scene. In addition, even in a fast-moving scene, even if this method is used, it is possible to cope by repeating extraction in the direction of reducing the time difference as described later.

  In addition, in the multi-screen display shown in FIG. 4, an “UP” button 41 and a “DOWN” button 42 are arranged. If the time difference is desired to be extracted, the “DOWN” button 42 is used. Specifically, in the case of uniformly changing the extraction time interval between the images, pressing the “UP” button 41 once is a setting example shown in FIG. 5 (0.1 s, 0.5 s, 1 .0 s, 3.0 s), for example, (0.5 s, 2.5 s, 5.0 s, 15.0 s) is changed to a uniform 5 times interval, and each image is extracted. By pressing the “DOWN” button 42 once, each image is extracted with a uniform 1/5 times interval, for example (0.02 s, 0.1 s, 0.2 s, 0.6 s). Further, in the case where the interval of the extraction time between the images is changed stepwise, the “UP” button 41 is pressed twice in the setting example shown in FIG. 5 (0.1 s, 0.5 s, 1.. The interval of 0 s, 3.0 s) is changed to an interval such as (1.0 s, 2.0 s, 3.5 s, 5.0 s), for example, and each image is extracted, and conversely, the “DOWN” button 42 is pressed. By pressing once, for example, each image is extracted with an interval of (0.05 s, 0.1 s, 0.4 s, 1.2 s).

  Returning to FIG. 2, when the operator determines that the desired still image does not exist on the multi-screen after the screen of the display unit 14 is switched to the multi-screen display as described above in step S105. Without selecting any of the images displayed on the multi-screen (step S106), the following two operation methods are selected to search for a desired still image. That is, one is a method in which the “UP / DOWN” buttons 41 and 42 are pressed to re-extract an image centering on the image A (steps S107 and S108). The other is a method in which an arbitrary image in the images displayed on the multi-screen is moved to the center position, and this is used as image A to re-extract the previous and subsequent images (steps S109 and S110). .

  Then, until an image close to a desired still image is selected (step S111), the system control unit 11 repeats the processing from step S107 to step S111. When an image close to a desired still image is selected (step S111), an image obtained by adding a condition determination display by the “OK” button 31 and the “Re-select” button 32 as shown in FIG. It is displayed (step S112), and the operator is prompted to determine whether to save the selected image as the desired still image itself or to re-extract the desired still image (step S113). In the case of re-extraction, the process returns to step S107, and the processes from step S107 to step S113 are repeated.

  In this way, the operator repeatedly performs the processing from step S107 to step S113, thereby detecting and selecting an image close to a desired still image, and further narrowing down and saving it to the memory card 25. Find the desired still image. When a desired still image to be stored is found, the “OK” button 31 of the image is pressed (step S113), and the process proceeds to step S114.

  In step S114, a screen 60 showing the file size and file type, and YES / NO buttons 61 and 62 for final confirmation of storage as shown in FIG. 6 is displayed (step S114). When the operator presses the YES button 61 on the screen 60, the selected image is recorded on the recording medium (memory card) 25 (step S115), and the process is completed.

<Advantages of the embodiment>
According to the present embodiment, during playback of the magnetic tape 20 in the playback mode, the operator presses the image capture button 12a when determining that a desired still image has arrived, and uses the captured image as a reference. In addition, since the still images before and after that are extracted at arbitrary time intervals and displayed on a multi-screen, the range to which the desired still image belongs can be easily detected.

  The arbitrary time interval is set to increase stepwise as the distance from the reference still image increases, and the time interval can be changed according to the number of operations of the UP / DOWN buttons 41 and 42. . In this way, the time interval for extracting still images is increased stepwise, so that in the case of a slow-moving scene, the extraction operation is more difficult than the conventional method of extracting images at regular intervals. The number of repetitions is reduced, and a desired still image can be quickly extracted. Even in the case of a fast-moving scene, a desired still image can be easily extracted by repeating the still image extraction operation in the direction of decreasing the time interval using the DOWN button 42.

[Second Embodiment]
In the second embodiment, when two extracted images are selected in the first embodiment, reproduction display between the images is performed.

  FIG. 7 is a flowchart showing an operation according to the second embodiment of the present invention, and the CPU 11a reads a control program based on this flow from the ROM 11b and executes it. Elements that are the same as those in FIG. 2 are given the same reference numerals, and descriptions thereof are omitted.

  First, in the playback mode, the video signal recorded on the magnetic tape 20 is played back on the screen of the display unit 14 (step S101), and thereafter, the same processing as the processing from step S102 to step S104 in FIG. 2 is performed. Then, multi-screen display is performed (step S105). In this multi-screen display, as shown in FIG. 8, in addition to “UP / DOWN” buttons 41 and 42, a “PLAY2” button 81 is arranged.

  If the operator determines that the desired still image does not exist on the multi-screen, the system control unit 11 does not select any of the images displayed on the multi-screen (step S106), and the system control unit 11 performs the process. The process advances to S201 to determine whether or not the “PLAY2” button 81 has been pressed. When the “PLAY2” button is pressed by the operator and two images to be reproduced are selected from the multi-screen display (step S202), it is determined whether the time difference between the two images is equal to or longer than a certain time. (Step S203). At this time, if the time difference between the two images is small, the reproduction ends instantaneously even if it is reproduced, so that a warning is displayed if there is no time difference greater than a certain time (step S204).

  Thereafter, the reproduced image between the two images is displayed on the entire screen of the display unit 14 (step S205), the same processing as the processing from step S107 to step S115 in FIG. 2 is performed, and the processing ends.

  According to the present embodiment, a reproduced image between two selected images can be displayed, so that a desired still image can be searched more finely and quickly.

  According to the first and second embodiments, when a desired still image is determined and playback is started, or when extraction is stopped during extraction of a desired still image and playback is started, It is also possible to configure to start playback from the image selected at the time.

  It is also possible to configure such that a moving image is recorded by attaching a tag to a position in the moving image corresponding to a desired still image finally extracted.

  An object of the present invention is to supply a storage medium recording a program code of software for realizing the functions of the embodiment to a system or apparatus, and the computer (or CPU, MPU, etc.) of the system or apparatus is stored in the storage medium. It is also achieved by reading and executing the program code.

  In this case, the program code itself read from the storage medium realizes the functions of the above-described embodiments, and the program code and the storage medium storing the program code constitute the present invention.

  Examples of the storage medium for supplying the program code include a floppy (registered trademark) disk, a hard disk, a magneto-optical disk, a CD-ROM, a CD-R, a CD-RW, a DVD-ROM, a DVD-RAM, and a DVD. -RW, DVD + RW, magnetic tape, nonvolatile memory card, ROM, etc. can be used. Alternatively, the program code may be downloaded via a network.

  Further, by executing the program code read by the computer, not only the functions of the above-described embodiments are realized, but also an OS (operating system) running on the computer based on the instruction of the program code. A case where part or all of the actual processing is performed and the functions of the above-described embodiments are realized by the processing is also included.

  Further, after the program code read from the storage medium is written in a memory provided in a function expansion board inserted into the computer or a function expansion unit connected to the computer, the function expansion is performed based on the instruction of the program code. This includes a case where the CPU or the like provided in the board or the function expansion unit performs part or all of the actual processing, and the functions of the above-described embodiments are realized by the processing.

  In this case, the program is supplied by downloading directly from a storage medium storing the program or from another computer or database (not shown) connected to the Internet, a commercial network, a local area network, or the like.

It is a block diagram which shows the structure of the image reproduction apparatus which concerns on 1st Embodiment. It is a flowchart which shows the operation | movement which concerns on 1st Embodiment. It is a whole screen display figure of an extraction picture. It is a screen display figure at the time of the multi-screen display which concerns on 1st Embodiment. It is a conceptual diagram which shows the extraction time of the image before and behind. It is a screen display figure which shows the final confirmation screen of a preservation | save. It is a flowchart which shows the operation | movement which concerns on 2nd Embodiment. It is a screen display figure at the time of the multi-screen display which concerns on 1st Embodiment.

Explanation of symbols

11 System Control Unit 12 Operation Unit 13 Signal Processing Unit 14 Display Unit 15 Playback Unit 21 Tape Drum Mechanism 22 Mechanism Control Unit

Claims (5)

Playback means for playing back moving images;
Reference image extraction means for extracting a reference still image from a series of moving images reproduced by the reproduction means;
Peripheral image extraction means for extracting a peripheral still image from the reference still image at an arbitrary time interval;
Display control means for displaying the reference still image and the surrounding still image on a display screen;
An image reproducing apparatus comprising: a changing unit that changes the time interval.   The image reproduction apparatus according to claim 1, wherein the time interval is set to increase stepwise in a direction away from the reference still image. Selecting means for selecting a predetermined image from images displayed on the display screen by the display control means;
The image reproducing apparatus according to claim 1, further comprising an image output unit that outputs an image selected by the selection unit. An image extraction method for an image reproduction apparatus for reproducing a moving image, comprising:
A reference image extraction step of extracting a reference still image from a series of reproduced moving images;
A peripheral image extraction step of extracting a peripheral still image from the reference still image at an arbitrary time interval;
A display control step of displaying the reference still image and the surrounding still image on a display screen;
A changing step of changing the time interval;
A selection step of selecting a predetermined image from the images displayed on the display screen by the display control step;
An image output method for outputting the image selected in the selection step. A computer-readable control program for executing an image extraction method of an image reproduction apparatus for reproducing a moving image,
A reference image extraction step for extracting a reference still image from a series of reproduced moving images;
A peripheral image extraction step for extracting a peripheral still image from the reference still image at an arbitrary time interval;
A display control step for displaying the reference still image and the surrounding still image on a display screen;
A changing step of changing the time interval;
A selection step of selecting a predetermined image from the images displayed on the display screen by the display control step;
An image output step for outputting the image selected in the selection step.

Images