JP4901498B2 - Thumbnail image display method - Google Patents

Description

The present invention relates to a thumbnail image display method, and more particularly to a method for displaying a thumbnail image based on an image stored in a drive recorder.

  A vehicle-mounted monitoring device is known in which imaging information from a video camera mounted on an automobile is sequentially and cyclically stored in a semiconductor storage device, and an image at the time of an automobile accident occurs is stored (see Patent Document 1).

  In addition, when a plurality of surveillance cameras for monitoring one lane of a road are connected to the center via a network and a predetermined event occurs (with a stopped vehicle), an image for one screen at that time is displayed together with time information. Surveillance camera systems that transmit to the Internet are known (see Patent Document 2).

  Furthermore, when recording a television image, a thumbnail image based on a characteristic scene of the recorded image data (an image after 5 seconds from the start of recording) is created, stored together with the recorded image data, and a thumbnail image for re-instruction There is known a receiving / storing / reproducing apparatus that makes it easy to discriminate recorded image data (see Patent Document 3).

JP 63-16785 A (Fig. 1) Japanese Patent Laying-Open No. 2005-277660 (page 4) JP 2004-336443 A (FIG. 1)

  When you want to play back and check multiple images stored in the drive recorder when a predetermined event occurs, you want to quickly determine the contents of each stored image for each event. There was a request.

The present invention aims to provide a thumbnail image display method that aims to display the characteristic thumbnail image representing the event.

The thumbnail image display method according to the present invention acquires an image related to an event and event occurrence time data, and based on the event occurrence time data , a time after the start of image recording and the time when the event occurred The method includes a step of selecting an image corresponding to a predetermined time before as a feature image and displaying a thumbnail image based on the selected feature image.

In addition, the thumbnail image display method according to the present invention includes an acquisition unit that acquires an image related to an event and event occurrence time data, and a time after the start of image recording based on the event occurrence time data and The image processing apparatus includes selection means for selecting an image corresponding to a predetermined time before the time when the event occurs as a feature image, and display means for displaying a thumbnail image based on the selected feature image.
Furthermore, the thumbnail image display method according to the present invention acquires an image related to an event and event occurrence time data, and an event occurs after the time when image recording is started based on the event occurrence time data. An image corresponding to a predetermined time before the selected time is selected as a feature image, a thumbnail image based on the selected feature image is displayed, and when the displayed thumbnail image is selected, the selected thumbnail image is supported. And a step of reproducing and displaying an image for a predetermined time corresponding to the feature image.

Furthermore, the thumbnail image display method according to the present invention includes a plurality of images from a plurality of imaging units related to an event, event occurrence time data, an acceleration sensor output value detected in response to the event occurrence, and brake operation start time data. And tire lock data, and based on the acceleration sensor output value, select an image by the imaging unit related to the occurrence of the event from among a plurality of images by the plurality of imaging units, and the brake operation start time is determined from the event occurrence time. If the tire lock data indicates that the tire is locked earlier, a feature image is selected from the images taken by the selected imaging unit based on the brake operation start time data, and the brake operation start time is earlier than the event occurrence time. When the event occurs when the tire lock data indicates that the tire was not locked Based on data from the image by the imaging unit selected, than the time the recording of the image is started to select an image corresponding to a predetermined time earlier than the later and the time the event occurred as the feature image, which is selected The method includes a step of displaying a thumbnail image based on the feature image.

In the thumbnail image display method according to the present invention, a thumbnail image can be created and displayed based on an image capturing the direction in which there was an impact based on the output value from the G sensor. The most suitable representative thumbnail image can be displayed .

Further, in the thumbnail image display method according to the present invention, when there is an imaging start instruction from the operation unit, a thumbnail image is created and displayed based on an image a predetermined time before the imaging start instruction in consideration of a time lag. Therefore, it is possible to display the most suitable thumbnail image representing the event.

  A thumbnail image creation method according to the present invention will be described below with reference to the drawings. However, it should be noted that the technical scope of the present invention is not limited to these embodiments, but extends to the invention described in the claims and equivalents thereof.

  FIG. 1 is a diagram showing a schematic configuration of a system for executing a thumbnail image creating method according to the present invention.

  The system includes a drive recorder 100 mounted on a vehicle, a memory card 10 for storing an image stored when an event occurs in the drive recorder 100, and a center terminal 200 for reproducing the image stored in the memory card 10. Is done.

  The drive recorder 100 includes a first control unit 101 including a CPU, a ROM, a RAM, and the like, a G (gravity) sensor 102, a GPS (Global Positioning System) receiver 103, a switch, a button, and the like. 1 operation unit 104, a first memory 105 for temporarily storing images, a first memory card IF (interface) 106 having a slot for inserting the memory card 10 and writing images to the memory card 10 , GPS antenna 110, first CCD camera 111 to fourth CCD camera 114 functioning as an imaging unit, microphone 115 having a sound collecting function, ABS (Anti-lock Brake System) information detection unit 116, brake operation detection unit 117, and drive recorder The power supply unit 120 and the like for supplying power to each of the 100 elements are included.

  Further, the drive recorder 100 may be configured to play back an image on the display of the navigation device in cooperation with a navigation device (not shown). Further, the GPS receiver 103 is not necessarily an essential configuration, but may be configured to acquire position information received by an external device such as an AVM (Automatic Vehide Monitoring) system or a navigation device.

  The G sensor 102 detects gravitational acceleration in two axial directions (X axis and Y axis) orthogonal to each other. Note that the G sensor is located inside the vehicle so that the Y-axis direction (positive value) of the G sensor 102 matches the front side of the vehicle, and the X-axis direction (positive value) of the G sensor 102 matches the right side of the vehicle. Is arranged. Therefore, the first control unit 101 determines, based on the detection signal G (Gx, Gy) output from the G sensor 102, whether the vehicle has received an impact and from which direction of the vehicle the impact has been applied. It becomes possible to do. Note that Gx represents the gravitational acceleration in the X-axis direction and Gy represents the gravitational acceleration in the Y-axis direction. Further, the G sensor 102 may be a triaxial sensor, or the triaxial sensor may not use the data of the gravitational acceleration Gz in the Z-axis direction.

  The first control unit 101 controls each of the CCD cameras 111 to 114 to take one image every 0.1 second and sequentially store the taken images in the first memory 105 in a cyclic manner. . For example, the first memory 105 is configured to always store image data for 60 seconds (2400 images) captured by four CCD cameras. The images captured by the CCD cameras 111 to 114 are not limited to one image every 0.1 seconds, but may be one image every 0.05 seconds, for example. Alternatively, the four CCD cameras may be configured to capture and store one image alternately every 0.1 seconds.

  The ABS information detection unit 116 transmits tire lock data indicating whether the tire is locked and tire lock time data indicating the time when the tire is locked to the first control unit 101. That is, based on the tire lock data and the tire lock time data from the ABS information detection unit 116, the first control unit 101 can determine whether or not the tire is locked and when the tire is locked. .

  The brake operation detection unit 117 transmits brake operation data indicating whether or not the vehicle brake is operated and brake operation start time data indicating the time when the brake operation is started to the one control unit 101. That is, based on the brake operation data and the brake operation start time data from the brake operation detection unit 117, the first control unit 101 can determine whether or not the brake operation has been performed and the time at which the brake operation was started.

  A part or all of the GPS receiver 103, the first memory card IF 106, the GPS antenna 110, the first CCD camera 111 to the fourth CCD camera 114, the microphone 115, the ABS information detection unit 116, the brake operation detection unit 117, etc. It may be configured separately from 100. For example, when linked with an existing navigation device having a GPS function, the drive recorder 100 does not require a function such as the GPS receiver 103, so that the cost of the drive recorder 100 can be reduced accordingly.

  The center terminal 200 includes a second control unit 201 that includes a CPU, ROM, RAM, and the like, an output unit 202 that includes a printer, a display unit 203 that includes a display, a keyboard, a mouse, and the like. A second operation unit 204 configured, a second memory 205 for temporarily storing an image, and a second memory card for reading out an image from the memory card 10 and the like, and a slot for inserting the memory card 10 IF206 and the like. The center terminal 200 may be configured as a personal computer having a function corresponding to the above configuration.

  The memory card 10 is a CF card having a storage capacity of 128 Mbytes, and is inserted into a slot constituting the first memory card IF 106 to store a predetermined image when an event occurs. The stored image is ejected from the constituting slot and reinserted into the slot constituting the second memory card IF 206, and the stored image is output to the center terminal 200. Although a CF card is used as a memory card, the present invention is not limited to this. Other memory cards such as an SD card and a memory stick, portable HD, and other storage media are used instead of the CF card. be able to. Further, the storage capacity of the memory card or the like is arbitrary and can be freely determined according to the application.

  FIG. 2 is a diagram illustrating an arrangement example of a CCD camera or the like.

  As shown in FIG. 2A, the first CCD camera 111 is disposed toward the front of the vehicle 1, the second CCD camera 112 is disposed toward the right side of the vehicle 1, and the third CCD camera 113 is disposed behind the vehicle 1. The fourth CCD camera 114 is arranged toward the left side of the vehicle 1. Note that reference numerals 121, 122, 123, and 124 in FIG. 2A indicate examples of the imageable directions and / or imageable angles of the respective CCD cameras. A first operation unit 104 configured as a switch is disposed in the vicinity of the driver's seat, and a microphone 115 for a sound collecting microphone is disposed in front of the vehicle 1.

  In FIG. 2A, four CCD cameras are provided on all sides of the vehicle. However, one CCD camera may be disposed only in front of the vehicle (see FIG. 2B). The CCD cameras may be arranged only in front of and behind the vehicle (see FIG. 2C), and the three CCD cameras may be arranged so as to be able to pick up images in directions shifted by 120 degrees (FIG. 2D )reference). The arrangement examples of the CCD camera, switch, and microphone shown in FIGS. 2A to 2D are merely examples, and other arrangement methods may be adopted.

  Next, a method for storing an image or the like when an event occurs in the drive recorder 100 (see FIG. 2A) will be described with reference to FIGS.

  FIG. 3 is a diagram illustrating a case where an impact is received from the front.

  3A shows the direction of impact received by the vehicle 1, FIG. 3B shows an output example of the G sensor 102 when receiving the impact, and FIG. 3C shows the output from the G sensor 102. FIG. 3D to FIG. 3G show images (still images) captured by the first CCD camera 111 to the fourth CCD camera 114. FIG. 3D to FIG. 3G show the time-series changes in the absolute value of the combined value of the signal G (Gx, Gy). The image capturing timing (one image per 0.1 second) is shown, and FIG. 3H shows an example of a thumbnail image to be created. The creation of thumbnail images will be described later.

At time Tp, when an impact occurs in the vehicle 1 from the direction of the arrow 30 shown in FIG. 3A (front), the G sensor 102 detects gravity in the positive Y-axis direction as shown in FIG. An acceleration Gy31 is generated. At this time, the gravitational acceleration Gx in the X-axis direction is almost zero. Absolute value of the composite gravitational acceleration output from the G sensor ^{102 (Gx 2 + Gy 2)} 0 · 5 ( in this case Gy31) is the threshold acceleration Gs (e.g., 0.45) if above, the first control unit 101 It is determined that an event has occurred, and each CCD camera 111 to 114 operates to store in the memory card 10 an image that is captured and always stored in the first memory 105 in a cyclic manner.

  Specifically, control is performed so that an image for Tb seconds before the time Tp and an image for Ta seconds after the time Tp are stored in the memory card 10. For example, Tp can be 12 seconds and Ta can be 8 seconds. Note that the periods of Tb and Ta can be set freely.

  Therefore, the first control unit 101 stores 200 images shown as 33 in FIG. 3D in the first CCD camera 111, and 200 images shown as 34 in FIG. 3E in the second CCD camera 112. The third CCD camera 113 stores 200 images shown as 35 in FIG. 3 (f), and the fourth CCD camera 114 stores 200 images shown as 36 in FIG. 3 (g). Control to store the image. That is, in one event, 200 images for each CCD camera, a total of 800 images, are stored in the memory card 10.

  In addition, for each event, the first control unit 101 displays event type data (indicating that it is an event by the G sensor 102), event occurrence time data (Tp), and output G data (Gx, Gy), voice data for Tb seconds before time Tp and Ta seconds after time Tp with the microphone 115, tire lock data and tire lock time data during this time (between Tb and Ta), brake operation data and brake operation start time during this time The data is stored in the memory card 10 together with the image data. Note that only a part of the data described above may be stored in the memory card 10.

  The number of events stored in the memory card 10 can be changed according to the storage capacity of the memory card 10, but it is preferable that at least 10 events of data can be stored. The first control unit 101 also creates a folder in the memory card 10 for each event, image data, event type data, event occurrence time data (Tp), output G data (Gx, Gy) of the G sensor 102, Audio data, tire lock data, tire lock time data, brake operation data, and brake operation start time data are preferably stored.

  As described above, the drive recorder 100 can store the images of the period Tb before the time Tp when the impact occurred and the period Ta after the time Tp. In the case of an accident, the cause of the accident can be accurately investigated by analyzing the image stored later.

  FIG. 4 is a diagram showing a case where an impact is received from the right front side.

  4A shows the direction of impact received by the vehicle 1, FIG. 4B shows an output example of the G sensor when receiving the impact, and FIG. 4C shows an output signal G from the G sensor. FIG. 4D to FIG. 4G show images (still images) captured by the first CCD camera 111 to the fourth CCD camera 114, showing time-series changes in the absolute value of the combined value of (Gx, Gy). Imaging timing (one image per 0.1 second) is shown, and FIG. 4H shows an example of a thumbnail image to be created. The creation of thumbnail images will be described later.

  At time Tp, when an impact occurs in the vehicle 1 from the direction of the arrow 40 shown in FIG. 4A (right diagonally forward), the G sensor 102 detects the positive Y-axis direction as shown in FIG. Gravity acceleration Gy41 and positive gravity acceleration Gx42 in the positive X-axis direction are generated. When the absolute value 43 of the combined gravitational acceleration output from the G sensor 102 is greater than or equal to a threshold acceleration Gs (for example, 0.45), the first control unit 101 determines that an event has occurred, and each CCD camera 111-1. 114 operates to store an image to be captured in the memory card 10.

  Specifically, control is performed so that an image for Tb seconds before the time Tp and an image for Ta seconds after the time Tp are stored in the memory card 10. For example, Tp can be 12 seconds and Ta can be 8 seconds. Note that the periods of Tb and Ta can be set freely.

  Therefore, the first control unit 101 stores 200 images shown as 45 in FIG. 4D in the first CCD camera 111, and 200 images shown as 46 in FIG. 4E in the second CCD camera 112. The third CCD camera 113 stores 200 images shown as 47 in FIG. 4 (f), and the fourth CCD camera 114 stores 200 images shown as 48 in FIG. 4 (g). Control to store the image. That is, in one event, 200 images for each CCD camera, a total of 800 images, are stored in the memory card 10.

  In addition, for each event, the first control unit 101 displays event type data (indicating that it is an event by the G sensor 102), event occurrence time data (Tp), and output G data (Gx, Gy), voice data for Tb seconds before time Tp and Ta seconds after time Tp with the microphone 115, tire lock data and tire lock time data during this time (between Tb and Ta), brake operation data and brake operation start time during this time The data is stored in the memory card 10 together with the image data. Note that only a part of the data described above may be stored in the memory card 10.

  As described above, the drive recorder 100 can store the images of the period Tb before the time Tp when the impact occurred and the period Ta after the time Tp. In the case of an accident, the cause of the accident can be accurately investigated by analyzing the image stored later. In the example of FIGS. 3 and 4 described above, exceeding the threshold acceleration Gs is used as a trigger for generating an event. For example, when the amount of change in acceleration per unit time exceeds a certain value (for 0.1 seconds) In addition, it may be recognized that an event has occurred when the G value has changed by 0.3 or more.

  FIG. 5 is a diagram illustrating a case where the operation unit is operated.

  5A shows an example of an output signal of the first operation unit 104, and FIGS. 5B to 5E show images (still images) captured by the first CCD camera 111 to the fourth CCD camera 114. FIG. The timing (one image per 0.1 second) is shown, and FIG. 5F shows an example of a thumbnail image to be created. The creation of thumbnail images will be described later.

  As shown in FIG. 5A, when the operation signal 53 for instructing to start imaging is output from the first operation unit 104 shown in FIG. 2 at time Tp, the first control unit 101 generates an event. And the CCD cameras 111 to 114 operate so as to store the images taken by the CCD cameras 111 to 114 in the memory card 10.

  Specifically, control is performed so that an image for Tb seconds before the time Tp and an image for Ta seconds after the time Tp are stored in the memory card 10. For example, Tp can be 12 seconds and Ta can be 8 seconds. Note that the periods of Tb and Ta can be set freely.

  Therefore, the first control unit 101 stores 200 images shown as 54 in FIG. 5B in the first CCD camera 111, and 200 images shown as 55 in FIG. 5C in the second CCD camera 112. The third CCD camera 113 stores 200 images shown as 56 in FIG. 5D, and the fourth CCD camera 114 stores 200 images shown as 57 in FIG. Control to store the image. That is, in one event, 200 images for each CCD camera, a total of 800 images, are stored in the memory card 10.

  In addition, for each event, the first control unit 101 displays event type data (indicating an event according to an imaging start instruction from the operation unit 104), event occurrence time data (Tp), and the interval (between Tb and Ta). ) G sensor 102 output G data (Gx, Gy), voice data, tire lock data and tire lock time data in the meantime, and brake operation data and brake operation start time data in the meantime are stored in the memory card 10 together with image data. To do. Note that only a part of the data described above may be stored in the memory card 10.

  As described above, the drive recorder 100 can store images of the period Tb before the time Tp when the first operation unit 104 is operated and the period Ta after the time Tp. It is possible to confirm later the contents of the situation determined to be necessary based on the stored image. For example, when the vehicle is a taxi, the fourth CCD camera 114 is arranged so as to capture a customer seat, and when a suspicious behavior is seen by the customer, the first operation unit 104 is operated to store an image. Can be set to start.

  The image storage method in the drive recorder 100 has been described above with reference to FIGS. 3 to 5. As an event for starting image recording, data from the ABS information detection unit 116 and / or the brake operation detection unit 117 is used. For example, when a sudden braking operation or the like is performed, the first control unit 101 may determine that an event has occurred and start recording an image.

  Next, creation of thumbnail images in the center terminal 200 will be described.

  FIG. 6 is a diagram illustrating an example of a thumbnail image creation flow regarding one event.

  The flow shown in FIG. 6 is executed by the second control unit 201 of the center terminal 200 according to a program stored in advance, and is started based on a predetermined operation of the second operation unit 204. Further, it is assumed that when the flow shown in FIG. 6 is started, the memory card 10 in which the image is stored in the drive recorder 100 is inserted into the second memory card IF 206 constituting the slot.

  First, the second control unit 201 determines an event type based on event type data included in a data folder related to one event (S1).

  When the event is caused by the G sensor, the second control unit 201 acquires the output G (Gx, Gy) of the G sensor 102 (S2), and determines the composition ratio when the thumbnail image is created. It is determined according to G (Gx, Gy) (S3). For example, in the example of FIG. 3, since only Gy31, the image of the first CCD camera 111 is 100%. In the example of FIG. 4, the ratio of the images of the first CCD camera 111 and the second CCD camera 112 is Gy: Gx (ie, 3: 1).

  Next, the second control unit 201 selects a target CCD camera image according to the output G (Gx, Gy) acquired in S2 (S4). For example, in the example of FIG. 3, the vehicle 1 receives an impact only from the front, and as a result, the output of the G sensor 102 is only Gy31 (positive value), so the image of the first CCD camera 111 is selected. In the example of FIG. 4, the vehicle 1 receives an impact from right diagonally forward, and as a result, the outputs of the G sensor 102 are Gy41 (positive value) and Gx42 (positive value). The image of the 2CCD camera 112 is selected. If the vehicle 1 receives an impact from the rear, the output of the G sensor 102 is only Gy (negative value). Therefore, if the image of the third CCD camera 113 is selected and the vehicle 1 receives an impact from the left side, Since the output of the G sensor 102 is Gx (negative value), the image of the fourth CCD camera 113 is selected. When only one CCD camera is arranged in the vehicle, an image of one CCD camera is automatically selected.

  Next, the second control unit 201 acquires event occurrence time data (Tp) (S5), and among the images of the CCD camera selected in S4, an image before the predetermined time Tr from the event occurrence time Tp is a feature image. (S6). The reason why the image before the predetermined time Tr is selected is that the image slightly before the time when the impact occurred is easier to grasp the cause and the situation of the impact. The predetermined time Tr can be set to 0.2 seconds, for example, but an optimal value including 0 seconds can be selected according to the application.

  Next, the second control unit 201 generates a thumbnail image (an image obtained by reducing the combined image) by combining the feature images selected in S6 according to the combining ratio determined in S3, and displays it. The thumbnail image creation process for one event is terminated (S7).

  In the case of FIG. 3, according to the flow shown in FIG. 6, the feature image 37 captured before time Tr (for example, 0.2 seconds) is reduced from the image captured by the first CCD camera 111. Thus, a thumbnail image 37 (see FIG. 3H) is created.

  In the case of FIG. 4, according to the flow shown in FIG. 6, among the images captured by the first CCD camera 111, the feature image 49 and the second CCD captured before time Tp (for example, 0.2 seconds) from the time Tp. Of the images captured by the camera 112, the feature image 50 captured before time Tp (for example, 0.2 seconds) before the time Tp corresponds to the composition ratio (for example, 3: 1) determined in S3. A thumbnail image 51 (see FIG. 4H) is created by combining and reducing the size.

  When a plurality of feature images are selected, thumbnail images that are displayed alternately may be created instead of combining the plurality of feature images. The display time ratio may be determined according to the output G (Gx, Gy) of the G sensor 102. For example, in the example of FIG. 4, since Gx: Gy is 1: 3, the display time of the feature image 49 of the first CCD camera 111 is 3 seconds, and the feature image 50 of the second CCD camera 112 is 1 second. Can be determined.

  When the event type is determined by the operation of the first operation unit 104 in S1, the second control unit 201 selects a predetermined image of the CCD camera (S4). For example, in the example of FIG. 5, the image of the fourth CCD camera 114 is selected.

  Next, the second control unit 201 acquires the event occurrence time (Tp) (S5), and uses the image of the CCD camera selected in S4 as a feature image for a predetermined time Tr from the event occurrence time Tp. Select (S6). The image before the predetermined time Tr is selected when the first operation unit 104 is operated, there is a time lag in the operation, and the image slightly before the time when the first operation unit is operated is picked up more. This is because there are many cases where the image is close to the desired image. The predetermined time Tr can be set to 0.2 seconds, for example, but an optimal value including 0 seconds can be selected according to the application. In addition, since the operation time lag may vary depending on the event type, the value of the predetermined time Tr may be changed according to the event type.

  Next, the second control unit 201 creates a thumbnail image (an image obtained by reducing the image) from the image selected in S6 and displays the thumbnail image on the display unit 203 (S7). Thumbnail image creation processing related to one event Exit.

  In the case of FIG. 5, in accordance with the flow shown in FIG. 6, the feature image 58 imaged before time Tr (for example, 0.2 seconds) is reduced from the image imaged by the fourth CCD camera 114. Thus, a thumbnail image 58 (see FIG. 5F) was created.

  FIG. 7 is a diagram illustrating a display example of thumbnail images.

  FIG. 7 shows a state in which thumbnail images relating to a plurality of events are displayed on the display unit 203 of the center terminal 200.

  Each event 60 is a set of an absolute value 61 of the resultant gravitational acceleration output from the G sensor 102, a thumbnail image 62 indicating the characteristics of the event, and an event occurrence time 63.

  In FIG. 7, 20 events are displayed. However, the number of displays is not limited to this, and other numbers can be selected or displayed together with other elements. It is.

  FIG. 8 is a diagram showing an example of a screen for reproducing one event among the plurality of events shown in FIG.

  When the event indicated as 60 is selected by the second operation unit 204 from the plurality of events shown in FIG. 7, the screen is switched to the screen shown in FIG.

  In the screen of FIG. 8, 200 images captured by the first CCD camera 111 are displayed while being sequentially switched to the display area 70 by selecting one of the operation displays 74 (rewind, playback, stop, fast forward). The At the same time, 200 images captured by the second CCD camera 112 are displayed while being sequentially switched to the display area 71, and 200 images captured by the third CCD camera 113 are displayed while being sequentially switched to the display area 72, 200 images picked up by the fourth CCD camera 114 are displayed while being sequentially switched to the display area 73. In addition, it is preferable that the selected image is enlarged and displayed in the display area 70 by selecting the display areas 71 to 73. Note that the display method illustrated in FIG. 8 is an example, and another display method can be selected.

  In the example of FIG. 3, when an event occurs according to the output from the G sensor 102, the feature image is selected according to the event occurrence time data (Tp). However, it is possible to select a feature image using not only event occurrence time data but also brake operation start time data and tire lock data.

  For example, when the brake operation is performed at the event occurrence time (Tp) and the tire is locked, the image at the brake operation start time is selected as the feature image, the brake operation is performed at the event occurrence time (Tp), and the tire is locked. If not, it is possible to control to select an image at the event occurrence time as a feature image. This is because when the tire is locked, a serious situation may have occurred at the brake operation start time, and the timing image is important.

  In the above description, “image” includes both video and still images. The “event” refers to a special event worthy of imaging, and corresponds to, for example, a case where an acceleration equal to or greater than a threshold acceleration Gs is detected.

It is a figure which shows schematic structure of the system for performing the characteristic image production apparatus and method which concern on this invention. It is the 1st figure which shows the example of arrangement | positioning, such as a CCD camera. It is a 2nd figure which shows the example of arrangement | positioning, such as a CCD camera. It is a 3rd figure which shows the example of arrangement | positioning of a CCD camera etc. It is a 4th figure which shows the example of arrangement | positioning of a CCD camera etc. It is a figure which shows the case where the impact is received from the front. It is a figure which shows the case where the impact is received from right diagonally forward. It is a figure which shows the case where an operation part is operated. It is a figure which shows an example of a thumbnail image creation flow. It is a figure which shows the example of a display of a thumbnail image. It is a figure which shows the example of a screen which reproduces | regenerates one event of the some event shown in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Memory card 100 Drive recorder 101 1st control part 102 G sensor 104 1st operation part 106 1st memory 111 1st CCD camera 112 2nd CCD camera 113 3rd CCD camera 114 4th CCD camera 200 Center terminal 201 2nd control part 203 Display part 204 Second operation unit

Claims (4)

Obtain an image related to the event, the event occurrence time data and the event type data,
Based on said event occurrence time data and event type data, to select the previous SL image event corresponding to a predetermined time before the time point that occurs as a characteristic image,
Displaying a thumbnail image based on the selected feature images, it has a step,
The predetermined time is changed according to the event type data.
A thumbnail image display method characterized by that. Occurrence of the event, the impact, the operation by the operation unit, is due to the brake manipulation start or tire locking, thumbnail image display method according to claim 1. An acquisition means for acquiring an image associated with an event, the event occurrence time data and the event type data;
Selecting means for selecting on the basis of the event occurrence time data and event type data, the previous SL image event corresponding to a predetermined time before the time point that occurs as a characteristic image,
Have a display means for displaying a thumbnail image based on the selected feature images,
The predetermined time is changed according to the event type data.
A thumbnail image display device characterized by that. Obtain an image related to the event, the event occurrence time data and the event type data,
Based on said event occurrence time data and event type data, to select the previous SL image event corresponding to a predetermined time before the time point that occurs as a characteristic image,
Displaying a thumbnail image based on the selected feature image;
When displayed thumbnail image is selected, the image that are associated with the event corresponding to the characteristic image corresponding to the selected thumbnail image is reproduced and displayed, have a step,
The predetermined time is changed according to the event type data.
An image reproduction method characterized by the above.

Images