WO2016175011A1

WO2016175011A1 - Image playback device

Info

Publication number: WO2016175011A1
Application number: PCT/JP2016/061487
Authority: WO
Inventors: 海二鍋谷
Original assignee: シャープ株式会社
Priority date: 2015-04-28
Filing date: 2016-04-08
Publication date: 2016-11-03

Abstract

An image playback device is provided with: an image storage unit (251) for storing a moving image comprising a plurality of image frames captured continuously; a selection unit (2) for selecting two or more continuous image frames for slow playback from among the plurality of image frames in accordance with the content of a user operation; a setting unit (3) for setting the slow playback speed in a slow playback segment of the two or more selected image frames so that said slow playback speed varies in multiple stages; a frame generation unit (4) for generating a plurality of playback frames from the two or more selected image frames in accordance with the variation of the slow playback speed set by the setting unit; and a playback unit (5) for switching the plurality of playback frames generated by the frame generation unit at a preset playback frame rate and playing back the moving image.

Description

Image playback device

The present invention relates to an image reproducing device, and more particularly to an image reproducing device for reproducing a moving image.

As a recent smartphone or digital camera, devices capable of capturing moving images at a high speed assuming slow motion playback are provided. Moving images captured at high speed tend to increase the chances of being played back in slow motion.

For example, the moving image playback apparatus disclosed in Patent Document 1 (Japanese Patent Application Laid-Open No. 2010-45609) has a playback speed so that the playback frame rate is constant even when the slow playback speed is changed in multiple stages by a user operation. In response, a frame is generated by addition synthesis.

In addition, Patent Document 2 (Japanese Patent Laid-Open No. 2008-21857) and Patent Document 3 (Japanese Patent Laid-Open No. 52-89414) also disclose a technique for slow reproduction of an image.

JP 2010-45609 A JP 2008-219857 A JP 52-89414 A

When a user views a moving image captured at a high speed by slow playback, the time required for playback increases in proportion to the slow magnification during slow playback. Therefore, the higher the slow magnification, the longer the playback time, and the user feels painful to watch.

In the case of playback at a very high slow magnification generated by interpolation of a moving image captured at a very high speed or an image between frames, a moving image with an imaging time of 1 second has a playback time of several tens of seconds.

Furthermore, when switching from normal speed playback to slow playback suddenly, the playback speed does not change smoothly because the playback speed changes drastically. If the playback speed of the slow playback section is the same, the user feels the playback image as a monotonous image.

Therefore, an object of the present disclosure is to provide an image playback device that plays back images slowly at various speeds.

An image reproduction device according to an aspect of the present invention includes an image storage unit for storing a moving image composed of a plurality of image frames captured continuously, an operation reception unit for receiving a user operation on the image reproduction device, A selection unit for selecting two or more consecutive image frames to be played back slowly from a plurality of image frames according to the contents of the received user operation, and two or more selected image frames among the moving images In accordance with the change in the slow playback speed set by the setting unit from the setting unit for setting the slow playback speed and the selected two or more image frames so that the slow playback speed changes in the slow playback section A frame generation unit for generating a plurality of playback frames, and a plurality of playback frames generated by the frame generation unit And a playback unit for playing back a moving image by switching at the playback frame rate, and the frame generation unit performs the operation according to a predetermined playback frame rate in a slow playback section of the two or more selected image frames. The number of generated playback frames is changed between the slow playback speed before the change and the slow playback speed after the change so that the moving image is played back.

According to the present invention, there is provided an image playback device capable of slow playback of moving images at various speeds.

1 is an external view of a smartphone 100 according to Embodiment 1. FIG. It is a figure mainly showing an internal hardware structure of the smart phone 100 of FIG. 3 is a diagram schematically illustrating a configuration of functions related to moving image reproduction of the smartphone 100 according to Embodiment 1. FIG. FIG. 6 is a diagram showing a change in slow playback speed according to the symmetrical pattern according to the first embodiment. 3 is a flowchart showing image reproduction processing according to the first embodiment. It is a figure which shows the change of the slow reproduction speed according to the asymmetric type pattern which concerns on Embodiment 2. FIG. It is a figure which shows the change of the slow reproduction speed according to the handwritten pattern which concerns on Embodiment 3. FIG.

Hereinafter, embodiments will be described in detail with reference to the drawings, with reference to the drawings.
[Technology]
The image playback device selects two or more continuous image frames to be played back slowly in accordance with a user operation from among a plurality of continuously captured image frames. Further, the image playback device sets the slow playback speed of the two or more selected image frames to change in the slow playback section according to the user operation. Then, the image playback device performs slow playback of the selected two or more image frames during the playback of the moving image according to the set slow playback speed change during the playback section. Therefore, the user can view only the desired partial moving image of the moving images while changing the slow playback speed as desired by the user.

In each embodiment, a smartphone will be described as an example of an image playback device. The image reproduction apparatus can be applied to an apparatus having an image reproduction function and an image display function in general. For example, the present invention can be applied to an information processing terminal including a notebook personal computer, a portable phone, and a PDA (Personal Digital Assistant). The information processing terminal is not limited to a portable type, and may be a stationary type.

[Embodiment 1]
FIG. 1 is an external view of a smartphone 100 according to Embodiment 1. FIG. FIG. 2 is a diagram mainly illustrating an internal hardware configuration of the smartphone 100 in FIG. 1.

1 and 2, the smartphone 100 includes a housing 110, an antenna 120, a speaker 130, a display unit 210, a power button 150, a microphone 160, and an LED (Light Emitting Diode) 170.

The LED 170 is controlled to be turned on or off by a processor 230 described later in order to notify information. The display unit 210 includes a touch panel 140 and a display device 212. The display device 212 includes a liquid crystal display. The display device 212 is an example of a “display unit” that displays an image.

A memory card 152 as a recording medium is detachably attached to the smartphone 100 from the outside. The memory card 152 includes a flash memory, a RAM (Random Access Memory), and an SD card.

The smartphone 100 includes a processor 230, a display device controller 214 having a graphic memory 254, a camera 220, a memory 250, a communication circuit 260, a signal processing circuit 270, a vibrator 280, and a memory driver 151 in addition to the configuration shown in FIG. Is provided. The processor 230 includes a CPU (Central Processing Unit) 231 and a timer 232. The memory driver 151 accesses the attached memory card 152 under the control of the processor 230.

In the display unit 210, the touch panel 140 is placed on the display surface of the display device 212, so that both are integrated. An image displayed on the display surface is visible via the touch panel 140.

The touch panel 140 corresponds to an operation surface on which a handwriting operation, a touch operation, or the like is performed by an operation body such as a finger or a dedicated pen (not shown).

The camera 220 images a subject and outputs image data. During imaging, the image data from the camera 220 is processed by the processor 230 and then displayed on the display device 212 via the display device controller 214. As a result, the image being captured is displayed on the display device 212. Further, the processed data is stored in the memory 250.

The memory 250 stores data and programs. Specifically, it includes a ROM (Read Only Memory) that stores programs and data in a nonvolatile manner, and a RAM (Random Access Memory) that stores programs and data in a volatile manner. Details of data stored in the memory 250 will be described later.

The graphic memory 254 stores data for displaying an image on the display device 212. In another aspect, the RAM of the memory 250 and the graphic memory 254 may be configured as a single unit.

The display device controller 214 performs a drawing operation based on the data stored in the graphic memory 254 on the display device 212. The display device 212 displays an image according to the operation.

The communication circuit 260 converts the signal received by the antenna 120 and sends the converted signal to the processor 230. In another aspect, communication circuit 260 converts the signal sent from processor 230 into a signal for transmission, and sends the converted signal to antenna 120.

The signal processing circuit 270 converts the electrical signal sent from the microphone 160 and sends the converted signal to the processor 230. When the smartphone 100 outputs a sound, the signal processing circuit 270 converts the signal sent from the processor 230 into a sound output signal, and sends the converted signal to the speaker 130. The speaker 130 outputs sound based on the signal.

Vibrator 280 oscillates with a vibration pattern defined in advance based on a signal sent from processor 230.

The operation received by the processor 230 is not limited to a user operation via the touch panel 140, and includes an operation of pressing a physical button such as the power button 150.

FIG. 3 is a diagram schematically illustrating a configuration of functions related to moving image reproduction of the smartphone 100 according to the first embodiment. Each unit in FIG. 3 is realized by a program executed by the CPU 231 or a combination of a plurality of circuits that realize the function of each unit.

Referring to FIG. 3, CPU 231 of smartphone 100 has a function of processing data read from memory 250 and displaying the processed data on display device 212. The memory 250 includes an image storage unit 251.

The image storage unit 251 stores a moving image file including image data captured by the camera 220. The moving image file is configured by multiplexing the compressed moving image data and the audio data captured and compressed by the microphone 160 during imaging. A moving image corresponds to an image made up of a plurality of time-sequential image frames (corresponding to image data) in the order of imaging. If the number of image frames constituting a moving image is the same length of the imaging period, the number of image frames increases as the imaging speed of the camera 220 increases, and conversely, the number of image frames increases as the imaging speed decreases. Decrease. Hereinafter, the video data is also referred to as a moving image.

In another aspect, the image storage unit 251 stores a moving image file downloaded from an external terminal through communication via the antenna 120. In yet another aspect, the image storage unit 251 stores a moving image file read from the memory card 152. Since the audio data of the moving image file is well-known, detailed description regarding recording and reproduction of the audio data will not be repeated.

The CPU 231 of the smartphone 100 includes an operation reception unit 1, a selection unit 2, a setting unit 3, a frame generation unit 4, a reproduction unit 5, a representative acquisition unit 6, and an image processing unit 7.

The image processing unit 7 extracts moving image data from the moving image file in the image storage unit 251 and decodes the extracted data. Thereby, the compressed image is converted into a reproducible format.

The operation reception unit 1 receives the content of the user operation on the smartphone 100 via the touch panel 140 based on the output from the touch panel 140.

The selection unit 2 selects two or more image frames that are continuous in time series from the plurality of image frames (decoded image frames) of the moving image according to the content of the user operation received by the operation reception unit 1. select. Details of this selection process will be described later.

The setting unit 3 sets the slow playback speed so that the slow playback speeds of two or more image frames selected by the selection unit 2 change in the playback section of these image frames. The slow playback speed indicates a playback speed that is slower than the imaging speed. Details of the slow playback speed setting process will be described later.

The frame generation unit 4 generates a plurality of playback frames in accordance with changes in the slow playback speed set by the setting unit 3 in the playback section of the two or more selected image frames. The frame generation process includes a thinning process for thinning out one or more image frames from a plurality of image frames, and an interpolation process for generating a new image frame from an existing image frame. Since the thinning process and the interpolation process can apply known processes, detailed description of these processes will not be repeated.

The reproduction unit 5 performs a reproduction process for reproducing a moving image. Specifically, the playback unit 5 displays a plurality of playback image frames (hereinafter referred to as playback frames) generated by the frame generation unit 4 while switching at a predetermined playback frame rate. Output to the display device controller 214. The predetermined playback frame rate corresponds to the screen update speed unique to the display device 212.

In this embodiment, the imaging frame rate representing the imaging speed of the moving image by the camera 220 is 120 fps, and the predetermined reproduction frame rate is 30 fps. The frame rate represents, for example, the number of image frames (number of still images) processed per second. In addition, the frame rate of the slow playback speed described above indicates an imaging frame rate or less.

(Slow playback pattern and section settings)
The setting of the slow playback speed by the setting unit 3 will be described. The setting unit 3 uses a predetermined arithmetic expression according to the length of the total playback time of the moving image to be played back, the standard pattern specified by the user operation, and the slow playback section specified by the user operation, The slow playback speed that changes stepwise in the slow playback section is calculated. Here, the total playback time indicates the length of time required from the start to the end of playback when all moving images are played back at the same speed as the imaging speed. Further, the slow playback section corresponds to at least a part of the total playback time. Note that all the sections from the beginning to the end of the image of the entire playback time may be selected as the slow playback section.

Here, a method for setting the standard pattern and the slow playback section by the user operation will be described. The memory 250 stores a plurality of standard patterns and information for identifying each. When setting the standard pattern, the CPU 231 displays identification information of a plurality of standard patterns from the memory 250 on the display device 212. The user operates the touch panel 140 to select desired standard pattern identification information. The operation reception unit 1 receives the content of the selection operation. The setting unit 3 specifies the standard pattern selected by the user based on the received operation content.

Also, when setting the slow playback section, the representative acquisition unit 6 extracts and displays a plurality of representative image frames as representatives from the moving image of the moving image file in the image storage unit 251. Specifically, the moving image file includes a thumbnail image as a representative image frame corresponding to each scene of the moving image. The representative acquisition unit 6 extracts thumbnail images corresponding to each scene from the moving image of the moving image file, and displays the extracted thumbnail images on the display device 212 according to the order in which they were captured (to be reproduced). The user operates the touch panel 140 to select two or more consecutive thumbnail images from among a plurality of thumbnail images. The selection unit 2 specifies the slow playback section from the scene identification information of the two or more selected thumbnail images based on the user's operation content via the operation reception unit 1. For example, the slow playback section is specified as the Nth scene to the (N + n) th scene (N, n = 1, 2, 3,...).

In another aspect, the slow playback section may be specified as an elapsed time from the start of playback of a moving image (for example, 2 seconds to 10 seconds after the start, etc.) based on a user operation. Therefore, in this case, two or more consecutive image frames corresponding to 2 to 10 seconds after the start are specified as the targets for slow playback.

(Slow playback speed setting)
The setting unit 3 sets the slow playback speed so that the slow playback speed changes in a stepwise manner in the slow playback section. The slow playback speed setting process will be described by exemplifying a case where a symmetric pattern is designated as a standard pattern. FIG. 4 is a diagram showing a change in the slow playback speed according to the symmetric pattern according to the first embodiment. The pattern in FIG. 4 represents a step change in the slow playback speed by a line graph.

The horizontal axis of the graph in FIG. 4 indicates the length of the total playback time, and the vertical axis indicates the slow magnification (ie, slow playback speed). On the scale of the vertical axis, “normal speed”, “1/2 throw”, “1/4 throw”, “1/8 throw”, “1/16 throw”, “1/32 throw” "Are assigned in order. Further, a partial period of the total reproduction time on the horizontal axis indicates a slow reproduction section according to the user operation. The setting unit 3 changes in a stepwise manner with left-right symmetry (line symmetry) across a straight line (straight line perpendicular to the horizontal axis of the graph) passing through the center time of the slow playback section (hereinafter also referred to as center time CP). Set the slow magnification. Specifically, during the period from the start point of the playback section to the central time CP, the slow playback speed changes stepwise from the normal speed to the maximum slow playback speed (“1/32 slow”). During the period until the end of the playback section, the slow playback speed is set so as to change stepwise from the maximum slow playback speed (“1/32 slow”) to the normal speed.

(Generation of playback frame)
The reproduction frame generation processing by the frame generation unit 4 will be described by exemplifying a case where slow reproduction is performed according to the pattern of FIG. In this case, the image frames of the moving image are read out from the image storage unit 251 according to the sequential order in time series. The read image frames are processed by the image processing unit 7, and the processed image frames are output to the frame generation unit 4 in chronological order. The frame generation unit 4 generates a playback frame based on the image frame from the image processing unit 7.

Referring to FIG. 4, first, the playback speed is set to “normal speed” in the period from the start of playback of a moving image to time T1. Therefore, in order to reproduce a moving image at the same speed as the imaging speed, the frame generation unit 4 thins out three frame images from the four frame images every time four time-series frame images are received. As a result, the remaining one frame image is output to the reproduction unit 5 as a reproduction frame.

In the subsequent period from time T1 to time T2, the playback speed is set to a slow playback speed of “1/2 slow”. Therefore, in order to reproduce a moving image at a speed that is 1/2 of the imaging speed, the frame generation unit 4 thins out one frame image from the two frame images each time two time-series frame images are received. . As a result, the remaining one frame image is output as a playback frame to the playback unit 5.

In the subsequent period from time T2 to time T3, the playback speed is set to a slow playback speed of “1/4 slow”. Each time the frame generation unit 4 receives a time-series frame image, the frame generation unit 4 outputs the frame image to the reproduction unit 5 according to the reception order. During this period, the thinning process is not performed.

In the subsequent period from time T3 to time T4, the playback speed is set to a slow playback speed of “1/8 slow”. Therefore, in order to reproduce a moving image at a speed that is 1/8 of the imaging speed, the frame generation unit 4 performs a new interpolation process from the one frame image every time one frame image is received. A single frame image is generated. As a result, a total of two playback frames are output to the playback unit 5.

In the subsequent period from time T4 to time T5, the playback speed is set to a slow playback speed of “1/16 slow”. Therefore, in order to reproduce a moving image at a speed that is 1/16 of the imaging speed, the frame generation unit 4 newly receives a single frame image by a predetermined interpolation process every time a single frame image is received. Two frame images are generated. As a result, a total of three playback frames are output to the playback unit 5.

In the subsequent period from time T5 to time T6, the playback speed is set to a slow playback speed of “1/32 slow”. Therefore, in order to reproduce a moving image at a speed that is 1/32 of the imaging speed, every time a frame image is received, the frame generation unit 4 newly performs a new interpolation process from the one frame image. 7 frame images are generated. As a result, a total of eight playback frames are output to the playback unit 5.

After the slow playback speed reaches the slowest playback speed of “1/32 slow”, playback frames are sequentially generated so that the playback speed returns to the normal speed.

Specifically, the playback speed from time T6 to time T7 is “1/16 slow”, the playback speed from time T7 to time T8 is “1/8 slow”, and playback from time T8 to time T9 thereafter. The playback frame is generated so that the speed is changed to “1/4 slow”, and the playback speed is changed to “1/2 slow” from time T9 to time T10 thereafter, and the generated playback frame is played back. Is output to the unit 5.

The reproduction unit 5 outputs the reproduction frames in time series output from the frame generation unit 4 to the display device controller 214 while switching at a predetermined reproduction frame rate (30 fps). Therefore, the moving image data in the slow playback section is slowly played back on the display device 212 according to the stepwise change in the slow playback speed in FIG.

(Reproduction processing)
FIG. 5 is a flowchart showing image reproduction processing according to the first embodiment. A program according to this flowchart is stored in the memory 250. CPU 231 reads the program from memory 250 and executes the read program.

First, when a moving image file in the image storage unit 251 is designated, the above-described “slow playback pattern and section setting” processing is performed (step S1). Thereby, the standard pattern for setting the slow playback speed and the slow playback section are designated. For example, it is assumed that “right / left symmetrical pattern” is designated as the standard pattern.

The setting unit 3 calculates a slow playback speed that changes according to the pattern shown in FIG. 4, and stores information representing the change in the memory 250 (step S3).

Next, the CPU 231 starts playback of the moving image in the image storage unit 251 (step S5). Specifically, the image processing unit 7 starts decoding sequentially from the first image frame of the moving image.

The data from the image processing unit 7 is reproduced as a moving image (video) on the display device 212 (step S7, step S8). Specifically, the frame generation unit 4 generates a playback frame from the data output from the image processing unit 7 in accordance with the pattern information of FIG. 4 stored in the memory 250 (step S7). As a result, in the slow playback section of FIG. 4, thinning processing or interpolation processing is performed, and playback frames are generated so that the number of playback frames changes according to changes in playback speed. The playback unit 5 receives the playback frames in chronological order output from the frame generation unit 4, and outputs the received playback frames to the display device controller 214 while switching at a predetermined playback frame rate (step S8). ). Therefore, on the display device 212, in the slow playback section, the moving image is displayed so that the slow playback is performed according to the stepwise change in the playback speed.

The image processing unit 7 determines whether or not the end data (final image frame) of the moving image has been decoded (step S9). If the image processing unit 7 determines that the terminal data has not been decoded (NO in step S9), the process returns to step S7, and the reproduction process continues. On the other hand, when the image processing unit 7 determines that the end data has been decoded (YES in step S9), the reproduction process ends.

[Embodiment 2]
The second embodiment shows a modification of the first embodiment. In the second embodiment, another example of a standard pattern for variably setting the reproduction speed is shown.

FIG. 6 is a diagram showing changes in the slow playback speed according to the asymmetric pattern according to the second embodiment. The pattern of FIG. 4 is symmetrical with respect to the center time CP of the slow playback section, whereas FIG. 6 shows a left-right non-target pattern. Specifically, the slow playback speed in the period from the start time of the playback section to the central time CP changes stepwise, and the slow playback speed in the period from the central time CP to the end time of the playback section increases in stages. The changing pattern is not symmetrical about the central time CP.

In the second embodiment, even if the left / right asymmetric pattern of FIG. 6 is selected as the standard pattern, the moving image reproduction process can be performed in the same manner as in the first embodiment. As a result, the user can view the slow-played image while changing the playback speed according to the left-right asymmetric pattern for the portion of the moving image corresponding to the desired section.

[Embodiment 3]
The third embodiment shows a modification of the first and second embodiments. FIG. 7 is a diagram showing a change in the slow playback speed according to the handwritten pattern according to the third embodiment. Referring to FIG. 7, in the third embodiment, the user can set a pattern 32 representing a change in the slow playback speed based on a drawing trajectory 31 by handwriting input.

Specifically, the user writes a desired pattern on the touch panel 140 with a finger or a pen. The setting unit 3 extracts data representing the locus 31 of the user's handwritten drawing from the operation content received by the operation receiving unit 1. Then, the setting unit 3 collates the extracted trajectory 31 with a trajectory that changes in a step shape represented by each of the plurality of standard patterns in the memory 250. Based on the result of the collation, the setting unit 3 selects one pattern 32 representing a locus most similar to the handwritten locus 31 from among a plurality of standard patterns. The trajectory may be selected with a single stroke or may be selected as a trajectory connecting a plurality of selection points.

In the third embodiment, even when the pattern of FIG. 7 is selected as the standard pattern, the moving image reproduction process can be performed as in the first and second embodiments. Thus, the user can view the slow-played image while changing the playback speed of the portion of the moving image corresponding to the desired section according to the desired handwritten pattern.

In each embodiment described above, the program is recorded on a recording medium that can be read by the CPU 231 via the memory driver 151, such as the memory card 152 attached to the smartphone 100, and provided to the smartphone 100 as a program product. You can also. Alternatively, the program can be provided by being received by the antenna 120 of the smartphone 100 via a network and downloaded to the storage area of the memory 250.

The provided program product includes the program itself and a recording medium on which the program is recorded non-temporarily.

[Effect of the embodiment]
In each embodiment, the image reproduction device reproduces partial moving image data composed of two or more image frames specified by the user among moving image data while gradually changing the slow reproduction speed. Therefore, even if the slow playback speed that changes stepwise includes a playback speed with a high slow magnification (for example, “1/32”), the period of the maximum slow playback speed with the high slow magnification is set to the relevant part. It can be limited to a part of the moving image playback section. As a result, even if the moving image is played back slowly, it is possible to suppress the playback time from becoming excessively long. Moreover, the visual effect of the moving image by slow reproduction can be heightened by changing the slow reproduction speed stepwise.

The embodiment disclosed this time is an example, and is not limited to the above contents. The scope of the present invention is defined by the terms of the claims, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

1 Operation accepting unit, 2 selection unit, 3 setting unit, 4 frame generation unit, 5 playback unit, 6 representative acquisition unit, 7 image processing unit, 100 smartphone, 251 image storage unit.

Claims

An image playback device,
An image storage unit for storing a moving image composed of a plurality of image frames continuously captured;
An operation accepting unit for accepting a user operation on the image reproduction device;
A selection unit for selecting two or more consecutive image frames to be slowly reproduced from the plurality of image frames according to the content of the received user operation;
A setting unit for setting the slow playback speed so that the slow playback speed changes in the slow playback section of the selected two or more image frames of the moving images;
A frame generation unit for generating a plurality of playback frames from the selected two or more image frames according to a change in the slow playback speed set by the setting unit;
A reproduction unit for reproducing a moving image by switching a plurality of reproduction frames generated by the frame generation unit at a predetermined reproduction frame rate;
The frame generation unit
In the slow playback section of the two or more selected image frames, the number of the playback frames to be generated is set to the slow playback before the change so that the moving image is played according to the predetermined playback frame rate. An image reproduction device that changes between a speed and the slow reproduction speed after the change.
The image playback device according to claim 1, wherein the setting unit sets the slow playback speed so that the speed changes stepwise.
The user operation received by the operation receiving unit includes an operation for selecting one of a plurality of standard patterns indicating a gradual change in the slow playback speed,
The setting unit
The image playback device according to claim 2, wherein the slow playback speed is set such that the speed changes stepwise according to the one standard pattern selected according to the operation content received by the operation receiving unit.
The user operation received by the operation reception unit includes a handwriting input operation,
The setting unit
The image reproduction device according to claim 2, wherein a slow reproduction speed is set by the handwritten locus indicated by the operation content received by the operation reception unit.
The user operation received by the operation reception unit includes a handwriting input operation,
The setting unit
The image playback device according to claim 2, wherein the slow playback speed is set by a trajectory connecting a plurality of slow playback speed selection positions indicated by the operation content received by the operation receiving unit.
The image playback device further includes:
A display for displaying an image;
A representative acquisition unit for acquiring a plurality of representative image frames as representatives from the plurality of image frames;
A display control unit that displays the acquired plurality of representative image frames on the display unit,
The user operation received by the operation receiving unit includes an operation of specifying at least two of the plurality of representative image frames,
The said selection part selects the image frame imaged continuously between the said at least 2 representative image frames designated by the said user operation among the said several imaged image frames. The image reproducing device according to any one of the above.