JP4623393B2 - Vehicle periphery display device - Google Patents

Description

  The present invention relates to a vehicle periphery display device including an image acquisition unit that acquires a surrounding image of a vehicle photographed by a photographing device provided in the vehicle, and a display device that is provided in a vehicle interior and displays the surrounding image.

  Conventionally, in this type of vehicle periphery display device, a technique for assisting a driver's driving operation by superimposing and displaying an index line as an index of driving operation on an image periphery image of a vehicle photographed by a photographing device is known. ing. For example, Patent Document 1 discloses a technique for superimposing and displaying an index line indicating a predicted travel path to a parking target position based on a steering angle of a steering operation by a driver when the vehicle is parked. .

JP-A-11-334470

  In the vehicle periphery display device described above, the index line is displayed in a planar manner with respect to a vehicle periphery image having a three-dimensional depth. For this reason, for example, the index line should lie with respect to the road plane reflected in the peripheral image, but it is difficult to recognize the positional relationship between the peripheral image and the index line. Further, there are cases where it is difficult to intuitively recognize the index line, for example, it is difficult to distinguish between the line drawn on the road and the index line.

  The present invention has been made in view of the above problems, and an object thereof is to provide a peripheral display device that can easily recognize an index line.

  The vehicle peripheral display device according to the present invention has a characteristic configuration in which an image acquisition unit that acquires a peripheral image of the vehicle photographed by a photographing device provided in the vehicle, and a display device that is provided in a vehicle interior and displays the peripheral image. When the driver performs a driving operation, an index line serving as the driver's index is superimposed on the peripheral image with a side surface adjacent to the index line and a shadow adjacent to the side surface. And an indicator line output unit to be provided.

According to this configuration, it is possible to generate a visual effect such that the index line is lifted with respect to the surrounding image of the vehicle having a three-dimensional depth by the shadow portion. That is, it is possible to produce a visual effect as if the occupant sees the index line actually arranged on the road surface or the like that is captured in the surrounding image from the driver's seat.
As a result, the driver can surely grasp the index line, and can appropriately present the index line to the driver. In addition, the driver can clearly recognize the positional relationship between the peripheral image and the index line.

Since the index line superimposed on the surrounding image is stereoscopically displayed on the side surface as in this configuration, the index line is also stereoscopically displayed on the peripheral image of the vehicle having a three-dimensional depth. Thus, the positional relationship between the peripheral image and the index line can be easily recognized. In addition, the index line can be highlighted, and the occupant can clearly distinguish the peripheral image from the index line.
Further, for a driver with color blindness, since the index line is displayed with a side part and a shadow part, the color area of the index line is increased, and the index line is easily recognized. On the other hand, for the driver who does not have color blindness, the thickness of the line is not emphasized by displaying the index line in three dimensions.
As a result, the driver can surely grasp the index line, and can appropriately present the index line to the driver.

Further, it is possible to produce a visual effect such that the index line is raised on the surrounding image of the vehicle having a three-dimensional depth by the shadow portion. That is, it is possible to produce a visual effect as if the occupant sees the index line actually arranged on the road surface or the like that is captured in the surrounding image from the driver's seat.
As a result, the driver can grasp the index line more reliably.

  In addition, it is preferable that the index line output unit of the vehicle periphery display device according to the present invention displays the index line with the side surface portion provided on the side close to the imaging device. Moreover, it is preferable that the index line output unit display the shadow line on the side of the index line that is close to the imaging device.

  Thereby, it is possible to produce a visual effect as if the index line is raised with respect to the peripheral image. That is, it is possible to produce a visual effect as if the occupant sees a three-dimensional index line that is actually arranged on the road surface or the like shown in the surrounding image from the driver's seat. As a result, the occupant can more clearly recognize the positional relationship between the peripheral image and the index line. Further, the peripheral image and the index line can be more clearly distinguished.

  Here, the index line may be a broken line. According to this, it is possible to reduce the area covered with the index line in the peripheral image. For this reason, a passenger | crew can grasp | ascertain a periphery image exactly.

  In addition, the index line may be drawn by disposing an index of an arbitrary shape intermittently. For example, a line originally included in a peripheral image such as a white line or a parking lot line on a road and an index line can be clearly distinguished.

  Further, the index line output unit of the vehicle periphery display device according to the present invention displays the width of the index line, the width of the side surface, and the width of the shadow portion as the distance from the imaging device increases. Is preferred. Thereby, a perspective can be given to the index line, and the occupant can more reliably grasp the positional relationship of the index line in the peripheral image.

  The index line may be a predicted trajectory line indicating a predicted trajectory of the vehicle according to the steering angle. In addition, the index line may be a vehicle width extension line that is superimposed at a predetermined position in the peripheral image due to an optical relationship with the photographing apparatus regardless of the snake angle. The index line may be a distance guide line indicating a distance from the vehicle. As a result, the driver can easily recognize the predicted trajectory line, the vehicle width extension line, and the distance guide line on the screen of the display device.

Illustration of the front of the driver's seat of the vehicle Block diagram showing the basic configuration of the vehicle The block diagram which shows typically the structural example of the parking assistance apparatus which concerns on this invention Explanatory drawing which shows the movement locus in the case of parallel parking The figure which shows an example of the periphery image displayed on a monitor in the case of parallel parking The figure which shows an example of the periphery image displayed on a monitor in the case of parallel parking The figure which shows an example of a side line and a shadow line The figure which shows an example of a side line and a shadow line The figure which shows an example of a side line and a shadow line The figure which shows an example of the peripheral image displayed on the monitor in another embodiment The figure which shows an example of the peripheral image displayed on the monitor in another embodiment The figure which shows an example of the peripheral image displayed on the monitor in another embodiment The figure which shows an example of the peripheral image displayed on the monitor in another embodiment The figure which shows an example of the peripheral image displayed on the monitor in another embodiment The figure which shows an example of the peripheral image displayed on the monitor in another embodiment The figure which shows an example of the peripheral image displayed on the monitor in another embodiment The figure which shows an example of the peripheral image displayed on the monitor in another embodiment The figure which shows an example of the peripheral image displayed on the monitor in another embodiment

Hereinafter, an example in which the peripheral display device of the present invention is applied to a parking support device that supports a driving operation when a vehicle is parked will be described.
FIG.1 and FIG.2 shows the basic composition of the vehicle 30 provided with this parking assistance apparatus. The steering 24 provided in the driver's seat is interlocked with the power steering unit 33 and transmits the rotational operation force to the front wheels 28f to steer the vehicle 30. The front wheel 28f corresponds to the steering wheel of the present invention. An engine 32 and a speed change mechanism 34 having a torque converter, CVT, and the like for shifting the power from the engine 32 and transmitting the power to the front wheels 28f and the rear wheels 28r are arranged at the front of the vehicle body. Power is transmitted to the front wheel 28f and / or the rear wheel 28r according to the driving method of the vehicle 30 (front wheel drive, rear wheel drive, four wheel drive). In the vicinity of the driver's seat, an accelerator pedal 26 as an accelerator operating means for controlling the traveling speed, and a brake pedal 27 for applying a braking force to the front wheels 28f and the rear wheels 28r via the brake devices 31 for the front wheels 28f and the rear wheels 28r, Are arranged in parallel.

  A monitor 20 (display device) in which a touch panel 23 is formed on the display unit 21 is provided at an upper position of the console near the driver's seat. In the present embodiment, the monitor 20 is of a liquid crystal type provided with a backlight. The monitor 20 is also provided with a speaker 22. The touch panel 23 is a pressure-sensitive type or an electrostatic type, and outputs a contact position of a finger or the like as location data. As will be described later, in the present embodiment, the touch panel 23 of the monitor 20 is used as an instruction input means for starting parking assistance. When the navigation system is mounted on the vehicle 30, it is preferable that the monitor 20 is also used as a display device for the navigation system.

  The monitor 20 may be of a plasma display type or a CRT type, and the speaker 22 may be provided at another place such as the inside of a door. In addition, in the case where another switch or the like is provided as an instruction input means for starting parking assistance, the touch panel 23 of the monitor 20 is not necessarily used as an instruction input means for the parking assistance device.

  A steering sensor 14 is provided in the operation system of the steering 24, and the steering operation direction and the operation amount are measured. The operation system of the shift lever 25 is provided with a shift position sensor 15 to determine the shift position. The operation system of the accelerator pedal 26 is provided with an accelerator sensor 16 to measure an operation amount. The operation system of the brake pedal 27 is provided with a brake sensor 17, which detects the presence or absence of operation.

  In addition, a rotation sensor 18 that measures the amount of rotation of at least one of the front wheel 28f and the rear wheel 28r is provided as a movement distance sensor. In this embodiment, the case where the rotation sensor 18 is provided in the rear wheel 28r is illustrated. As for the movement distance, the transmission mechanism 34 may measure the movement amount of the vehicle 30 from the rotation amount of the drive system. In addition, the vehicle 30 is provided with an ECU (electronic control unit) 10 that is the core of the parking assistance device of the present invention and that performs traveling control including parking assistance.

  A camera 12 that captures a scene behind the vehicle 30 is provided at the rear of the vehicle 30. The camera 12 is a digital camera that incorporates an image sensor such as a charge coupled device (CCD) or a CMOS image sensor (CIS) and outputs information captured by the image sensor in real time as moving image information. The camera 12 includes a wide-angle lens and has a field angle of about 140 degrees on the left and right, for example. The camera 12 is installed with a depression angle of, for example, about 30 degrees toward the rear of the vehicle 30 and photographs a region up to about 8 m behind. The captured image is input to the ECU 10 and used for parking assistance or the like.

  FIG. 3 is a block diagram schematically showing a configuration example of the parking assist apparatus according to the present invention having the ECU 10 as a core. As shown in the figure, the ECU 10 includes functional units such as a calculation unit 1, an image acquisition unit 2, and a display control unit 3. The calculation unit 1 is a functional unit that calculates the guidance route described above based on FIG. 3, and includes functional units such as a parking target setting unit 4, a guidance unit 5, and an index output unit 6. Each functional unit of the ECU 10 is realized by cooperation with software such as a program executed on the hardware, with logical operation hardware such as a microcomputer and a DSP (digital signal processor) as a core. Therefore, each functional unit shows a sharing as a function and does not necessarily need to be physically configured independently. The ECU 10 also includes various memories such as a frame memory for storing images and various electronic circuits such as an image processing circuit. Since the configurations and functions of these various memories and various electronic circuits are known, illustration and detailed description thereof are omitted.

  The image acquisition unit 2 is a functional unit that acquires a peripheral image of the vehicle 30 captured by the camera 12 (imaging device). The image acquisition unit 2 includes a frame memory for storing images, a synchronization separation circuit, and the like. The display control unit 3 is a functional unit that displays a peripheral image of the vehicle 30 captured by the camera 12 on a monitor 20 (display device) in the vehicle interior.

  The calculation unit 1 sets a parking target position P3 (see FIG. 4) of the vehicle 30 and calculates a guide route to the parking target position P3. In the present embodiment, the setting of the parking target position P3 and the calculation of the guidance route to the parking target position P3 are performed with the approximate center Q of the axle of the rear wheel 28r of the vehicle 30 as the reference point of the vehicle. Moreover, the calculating part 1 produces | generates the index line used as the parameter | index when a driver | operator guides driving operation. The parking target setting unit 4 included in the calculation unit 1 is a functional unit that sets the parking target position P <b> 3 of the vehicle 30. Moreover, the guide part 5 which the calculating part 1 has is a function part which calculates the guide route to the parking target position P3. Detection results are input to the computing unit 1 from the steering sensor 14, the shift position sensor 15, the accelerator sensor 16, the brake sensor 17, the rotation sensor 18, and the like. Based on the detection results of these sensors, the parking target position P3 and the guidance route are determined. Is calculated. The index line output unit 6 included in the calculation unit 1 generates an index line for guiding the driver, and causes the display unit 3 to superimpose and display the index line on the surrounding image via the display control unit 3.

  FIG. 5 is a diagram showing a screen of the monitor 20 in which a parking frame line 50a (an example of an index line) indicating a parking space E is superimposed and displayed on a peripheral image when parallel parking is performed between two parked vehicles. As shown in FIG. 5, the parking frame line 50a is provided with a side surface line 50b extending along the parking frame line 50a and a shadow line 50c extending along the side surface line 50b. In the present embodiment, a side line 50b (corresponding to a side part of the present invention) and a shadow line 50c (corresponding to a shadow part of the present invention) narrower than the parking frame line 50a are provided for a wide parking frame line 50a. It is attached. Here, although not particularly limited, for example, the parking frame line 50a, the side surface line 50b, and the shadow line 50c are displayed in blue, and the lightness decreases in the order of the parking frame line 50a, the side surface line 50b, and the shadow line 50c. That is, it is set to approach black. Of course, the present invention is not limited to this, and it may be a color other than blue, such as red or yellow, and the hue itself may be different. Thereby, the parking frame line 50a is displayed in a three-dimensionally superimposed manner on the peripheral image. For this reason, the parking frame line can be highlighted, and the occupant can clearly distinguish the peripheral image from the parking frame line 50a.

  FIG. 6 is a diagram showing a screen of the monitor 20 in which a parking frame line 50a indicating a parking area is superimposed and displayed on a peripheral image when parallel parking is performed between two vehicles. Similarly, in the case of parallel parking, the parking frame line 50a is provided with a side surface line 50b and a shadow line 50c, and the parking frame line 50a is three-dimensionally displayed in the peripheral image. For this reason, the parking frame line can be highlighted, and the occupant can clearly distinguish the peripheral image from the parking frame line 50a.

  7, 8, and 9 are diagrams illustrating an example of attaching side lines and shadow lines to the parking frame line. In the present embodiment, the side lines and the shadow lines are attached along the side closer to the camera 12 among the parking frame lines. That is, as shown in FIG. 7, when the camera 12 is positioned between the pair of left and right parking frame lines 61 a and 62 a extending along the traveling direction of the vehicle 30 in the width direction of the vehicle 30, Side line 61b, 62b and shadow line 61c, 62c are attached inside parking frame line 61a, 62a. About a pair of parking frame line 63a, 64a extended in the direction which cross | intersects a pair of left and right parking frame lines 61a, 62a, the side line 63b, 64b and the shadow line 63c, 64c are attached along the side close | similar to a vehicle. The

  Further, as shown in FIG. 8, the camera 12 is positioned on the monitor 20 on the right side of the right parking frame line 62a among the pair of left and right parking frame lines 61a and 62a extending along the traveling direction of the vehicle 30. When doing so, the side surface lines 61b and 62b and the shadow lines 61c and 62c are attached on the right side of the parking frame lines 61a and 62a. Further, as shown in FIG. 9, the camera 12 is positioned on the left side of the left parking frame line 61a on the monitor 20 in the pair of left and right parking frame lines 61a and 62a extending along the traveling direction of the vehicle 30. In this case, side lines 61b and 62b and shadow lines 61c and 62c are attached to the left side of the parking frame lines 61a and 62a. As for the pair of parking frame lines 63a and 64a extending in the direction intersecting with the pair of left and right parking frame lines 61a and 62a, side lines 63b and 64b along the side close to the vehicle 30 as in the case of FIG. And shadow lines 63c and 64c. By adding side lines and shadow lines as described above, it is possible to create a visual effect as if the index line is raised relative to the surrounding image, and the occupant more clearly distinguishes between the peripheral image and the index line. can do.

Next, the operation of this parking assistance apparatus will be described by taking as an example a case where parallel parking is performed in a parking space E between two parked vehicles 41 and 42 as shown in FIG.
When the driver advances the vehicle 30 from the position P1 and advances the vehicle to the position P2 where the entire view of the parking space E is displayed on the monitor 20, and the vehicle is temporarily stopped, the speed sensor 7b indicates that the vehicle 30 is stopped. And the detection result is transmitted to the calculation unit 1 of the parking assistance device. Further, when the driver sets the shift lever to reverse, the shift position sensor 15 detects that the shift lever is set to reverse, and transmits the detection result to the calculation unit 1. When the above two detection results are transmitted to the calculation unit 1, the parking target setting unit 4 sets the parking target position P3 based on the surrounding image. Although the detailed description of the method for setting the parking target position is omitted, it is performed by recognizing an obstacle such as a lane line provided in the parking space E or the front and rear parked vehicles 41 and 42 by image recognition, for example. .

  When the parking target position P3 is set, the guidance unit 5 calculates a guidance route based on the parking target position P3 set by the parking target setting unit 4 and the current vehicle position P2. Moreover, as shown in FIG. 5, the index line output unit 6 generates a parking frame line 50a, a side line 50b, and a shadow line 50c indicating the parking space E based on the set parking target position P3, and a display control unit 3, the parking frame line 50 a, the side surface line 50 b, and the shadow line 50 c are superimposed and displayed on the surrounding image.

  When it is not necessary to change the initially set parking target position P3, when the occupant touches the display of “OK”, the parking target position P3 is fixed. On the other hand, when the occupant wants to change the parking target position P3, the parking target position P3 can be changed by, for example, a touch panel operation. The parking target position P3 may be changeable by a steering operation.

  When the parking target position P3 is determined, the guide unit 5 detects that the shift lever is set to reverse and that the brake is released by the occupant, and controls the ECU 10 to place the vehicle 30 in the parking target position. Guide to P3. In addition, a display of “parking support cancellation” may be provided on the screen of the monitor 20 so that the driver can stop the parking support as necessary by touching the display. Further, for example, the parking assistance may be stopped when the occupant operates the brake, the steering, or the like. When the vehicle 10 reaches the parking target position, the ECU 10 is controlled to stop the vehicle 30 and end the parking assistance.

[Another embodiment]
(1) In the above-described embodiment, the example in which the vehicle 30 is guided to the set parking target position by automatic steering is shown, but the present invention is not limited to this. For example, as shown in FIG. 10, the predicted course line of the vehicle is superimposed and displayed on the surrounding image as an index line, and the driver performs a steering operation or the like to park based on the predicted course line. Good.

  In this embodiment, as shown in FIG. 10, the backward prediction line is superimposed and displayed on the peripheral image via the display control unit 3. The backward prediction line is an index line indicating a predicted trajectory of the rear end of the vehicle 30 according to the steering angle of the vehicle 30 moving backward. In the present embodiment, the rear prediction line 51 includes a prediction trajectory line 51a indicating a prediction trajectory at the rear end of the vehicle 30 and distance guide lines 52a, 53a, and 54a behind the vehicle 30. The distance guide lines 52a, 53a, 54a are a 5m guide line 54a, a 3m guide line 53a, and a 1m caution line 52a in this example. The backward prediction line 51 is basically drawn in yellow. However, the 1m caution line 52a is displayed in red in order to alert the driver.

  In addition, a vehicle rear line 55 is displayed in the peripheral image. The vehicle rear line 55 is an index line indicating a predetermined position behind the vehicle 30 regardless of the steering angle of the vehicle 30. Therefore, the image is superimposed and displayed at a fixed predetermined position in the peripheral image due to the optical relationship with the camera 12 installed in the vehicle 30. In the present embodiment, the vehicle rear line 55 includes a vehicle width extension line 55a and a 1 m guide line 56a as a distance guide line. In the present embodiment, the vehicle rear line 55 is displayed in a color different from the rear prediction line 51, such as green, in order to easily distinguish the vehicle rear line 55 from the rear prediction line 51.

  Also in the present embodiment, the indicator line output unit 6 displays the rear prediction line 51 and the vehicle rear line 55 with side lines and shadow lines. Specifically, a side line 51b and a shadow line 51c are attached to the inner side of the pair of left and right prediction trajectory lines 51a of the rear prediction line 51, and the vehicle 30 of the 5m reference line 54a, the 3m reference line 53a, and the 1m caution line 52a. Side lines 54b, 53b, and 52b and shadow lines 54c, 53c, and 52c are attached along the side close to. In addition, side lines 55b and 56b and shadow lines 55c and 56c are attached along the inside of the pair of left and right vehicle width extension lines 55a and the vehicle 30 side of the 1 m reference line in the vehicle rear line 55. In this way, the rear prediction line 51 and the vehicle rear line 55 are displayed in a three-dimensionally superimposed manner on the peripheral image.

  In this embodiment, the driver performs the steering operation so that the vehicle 30 does not collide with an obstacle such as the parked vehicles 41 and 42 while referring to the rear prediction line 51 and the vehicle rear line 55 superimposed on the surrounding image. The vehicle 30 is moved backward to guide the vehicle 30 to the parking space E. When the driver confirms that the vehicle rear line 55 is substantially parallel to the parking space E, the driver stops the vehicle 30.

(2) In the above embodiment, the case where the index line is a solid line has been described as an example. However, the index line may be a line other than a solid line such as a broken line. Further, a combination of a solid line and a line other than a solid line such as a broken line may be used.
FIG. 11 shows an example in which a vehicle rear line 55 composed of a vehicle width extension line 55a and a 1 m guide line 56a as a distance guide line is superimposed on the surrounding image. In this example, the 1 m reference line 56a is displayed as a solid line as in the above-described embodiment, but the vehicle width extension line 55a is displayed as a broken line.

  Also in the present embodiment, the index line output unit 6 displays the vehicle rear line 55 with side lines and shadow lines along the side closer to the imaging device (camera 12). That is, the side lines 55b and 56b and the shadow lines 55c and 56c are attached along the inside of the pair of left and right vehicle width extension lines 55a of the vehicle rear line 55 and along the vehicle 30 side of the 1 m reference line 56a. It should be noted that the side line 55b and the shadow line 55c are also displayed as broken lines on the broken line width extension line 55a, and are attached at positions corresponding to the broken line of the line width extension line 55a.

  Here, although not particularly limited, for example, the vehicle width extension line 55a is displayed in blue, and the 1 m reference line 56a is displayed in red. The side line 55b and the shadow line 55c of the vehicle width extension line 55a are also displayed in blue, but the brightness decreases in order of the vehicle width extension line 55a, the side line 55b, and the shadow line 55c, that is, it approaches black. Is set to Further, the side line 56b and the shadow line 56c of the 1m reference line 56a are displayed in red, but the brightness is set so as to decrease in the order of the 1m reference line 56a, the side line 56b, and the shadow line 56c. Of course, the present invention is not limited to this, and colors other than those described above, such as yellow, may be used, and the hue itself may be different. In this way, the vehicle rear line 55 is displayed in a three-dimensional manner superimposed on the surrounding image.

(3) When all or part of the index line is displayed with a broken line as described above, the index line can be drawn by disposing indexes of any shape intermittently.
FIG. 12 shows an example in which a vehicle rear line 51 composed of a vehicle width extension line 55a and a 1m guide line 56a and a 5m guide line 57a as distance guide lines is superimposed on a peripheral image. In this example, cross-shaped indexes 55d, 56d, and 57d are intermittently arranged, and a vehicle width extension line 55a and a 1m reference line 56a and a 5m reference line 57a as distance reference lines are drawn. Also in this case, as in the above-described embodiment, the side surface portions 55e, 56e, 57e and the shadow portions are respectively provided on the indicators 55d, 56d, 57d constituting the vehicle width extension line 55a, the 1m reference line 56a, and the 5m reference line 57a. 55f, 56f, and 57f are attached.

(4) In the above-described embodiment, the example in which the index line output unit 6 displays the index line with the side surface portion (side surface line) and the shadow portion (shadow line) displayed has been described. ) And the shadow part (shadow line) need not be displayed, and only one of the side part (side line) and the shadow part (shadow line) may be displayed.
FIGS. 13 to 15 show examples in which the index line output unit 6 displays only the shadow (shadow line) on the index line.

  FIG. 13 shows an example in which shadow lines 55c and 56c are added to the vehicle rear line 55, which is composed of a solid vehicle width extension line 55a and a solid 1m standard line 56a as a distance standard line, and superimposed on the surrounding images. The index line output unit 6 attaches shadow lines 55c and 56c along the side of the index line that is closer to the imaging device. That is, the shadow lines 55c and 56c are given along the inside of the pair of left and right vehicle width extension lines 55a of the vehicle rear line 55 and the vehicle 30 side of the 1 m reference line 56a.

  FIG. 14 shows an example in which a vehicle rear line composed of a broken vehicle width extension line 55a and a solid 1m guide line 56a as a distance guide line is superimposed and displayed on a peripheral image. Also in this case, the index line output unit 6 adds a shadow line along the side of the index line that is closer to the imaging device. That is, the shadow lines 55c and 56c are attached along the inside of the pair of left and right vehicle width extension lines 55a of the vehicle rear line 55 and along the vehicle 30 side of the 1 m reference line 56a.

  FIG. 15 shows an example in which cross-shaped indexes 55d, 56d, and 57d are intermittently arranged, and a vehicle width extension line 55a and a 1m reference line 56a and a 5m reference line 57a as distance reference lines are drawn. Show. In this case as well, shadow portions 55f, 56f, and 57f are attached to the indicators 55d, 56d, and 57d constituting the vehicle width extension line 55a, the 1m reference line 56a, and the 5m reference line 57a, respectively.

  FIGS. 16 to 18 show examples in which the index line output unit 6 displays only the side surface (side surface line) on the index line.

  FIG. 16 shows an example in which side lines 55b and 56b are added to the vehicle rear line 55, which is composed of a solid vehicle width extension line 55a and a solid 1m standard line 56a as a distance standard line, and superimposed on the surrounding image. The index line output unit 6 attaches shadow lines 55b and 56b along the side of the index line that is closer to the imaging device. That is, side lines 55b and 56b are attached along the inside of the pair of left and right vehicle width extension lines 55b of the vehicle rear line 55 and along the vehicle 30 side of the 1 m reference line 56b.

  FIG. 17 shows an example in which a vehicle rear line composed of a broken vehicle width extension line 55a and a solid 1m guide line 56a as a distance guide line is superimposed and displayed on a peripheral image. Also in this case, the index line output unit 6 attaches a side line along the side of the index line that is closer to the imaging device. That is, the shadow lines 55b and 56b are attached along the inside of the pair of left and right vehicle width extension lines 55a of the vehicle rear line 55 and along the vehicle 30 side of the 1 m reference line 56a.

  FIG. 18 shows an example in which cross-shaped indicators 55d, 56d, and 57d are intermittently arranged, and the vehicle width extension line 55a and the 1m reference line 56a and the 5m reference line 57a as the distance reference lines are drawn. Show. In this case as well, side surfaces 55e, 56e and 57e are attached to the indicators 55d, 56d and 57d constituting the vehicle width extension line 55a, the 1m reference line 56a and the 5m reference line 57a, respectively.

(5) In the above-described embodiment, the index line output unit 6 is configured to display the index line, the side line, and the shadow line narrower as the distance from the camera 12 increases. May be. That is, in the case of the above-described first embodiment, the pair of left and right parking frame lines 51a and 52a extending in the direction along the travel lane of the vehicle 30, and the side line 51b attached to the parking frame lines 51a and 52a, 52b and the shadow lines 51c and 52c are displayed so that the width decreases as the distance from the vehicle 30 increases. Also, a pair of parking frame lines 53a and 54a extending in a direction perpendicular to the traveling lane, and side lines 53b and 54b and shadow lines 53c and 54c attached along the parking frame lines 53a and 54a are provided on the vehicle. The width of the parking frame line 53a, the side line 53b, and the shadow line 53c on the near side is displayed so as to be wider than the width of the parking frame line 54a, the side line 54b, and the shadow line 54c on the side far from the vehicle 30. The

  Further, in the case of the second embodiment described above, the pair of left and right predicted trajectory lines 51a and the side line 51b and the shadow line 51c attached to the predicted trajectory line 51a have a width as they are separated from the vehicle. Displayed to be narrower. In addition, the distance guide line is displayed with a smaller width as the distance guide line is separated from the vehicle 30. In the case of this embodiment, the width of each position guide line is set so that the width becomes narrower in the order of the 1m attention line 52a, the 3m guide line 53a, and the 5m guide line 53a. Similarly, the widths of the side lines 52b, 53b, 54b and the shadow lines 52c, 53c, 54c attached to the position guide line are set to be narrower as the distance from the vehicle 30 increases. In addition, a pair of left and right vehicle width extension lines 55a, side surface lines 55b, and shadow lines 55c in the vehicle rear line 55 are displayed so that the width becomes narrower as the distance from the vehicle increases.

(6) In the above-described embodiment, the case where the vehicle periphery display device is applied to the parking assistance device has been described as an example, but the present invention is not limited thereto. The present invention can also be applied to a case in which an index line is superimposed and displayed on a peripheral image in a driving operation other than parking.

2 Image acquisition unit 6 Index line output unit 12 Camera (imaging device)
20 Monitor 30 Vehicle 50a Parking frame line (index line)
50b Side surface (side surface)
50c Shadow line (shadow part)
51a Predicted trajectory line (index line)
52a Distance reference line (index line)
53a Distance reference line (index line)
54a Distance reference line (index line)
55a Car width extension line 56a Distance reference line (index line)
61a, 62a, 63a, 64a Parking frame line (index line)
61b, 62b, 63b, 64b Side line (side part)
61c, 62c, 63c, 64c Shadow line (shadow part)

Claims (9)

An image acquisition unit for acquiring a peripheral image of the vehicle imaged by an imaging device provided in the vehicle;
A display device provided in a passenger compartment for displaying the surrounding image;
When a driver performs a driving operation, an index line serving as an index of the driver is superimposed on the peripheral image with a side surface adjacent to the index line and a shadow adjacent to the side surface. A vehicle periphery display device comprising an index line output unit.   2. The vehicle periphery display device according to claim 1, wherein the index line output unit displays the index line with the side surface portion on a side close to the imaging device.   The vehicle periphery display device according to claim 1, wherein the indicator line output unit displays the indicator line with the shadow portion on a side closer to the imaging device.   The vehicle periphery display device according to any one of claims 1 to 3, wherein the index line is a broken line.   The vehicle periphery display device according to any one of claims 1 to 4, wherein the index line is drawn by disposing an index having an arbitrary shape intermittently.   The index line output unit displays the width of the index line, the width of the side surface part, and the width of the shadow part narrower as the distance from the imaging device increases. The vehicle periphery display apparatus of description.   The vehicle periphery display device according to claim 1, wherein the index line is a predicted trajectory line indicating a predicted trajectory of the vehicle according to a steering angle.   The vehicle according to any one of claims 1 to 6, wherein the index line is a vehicle width extension line that is superimposed on a predetermined position of the peripheral image due to an optical relationship with the imaging device regardless of a snake angle. Peripheral display device.   The vehicle periphery display device according to any one of claims 1 to 6, wherein the index line is a distance guide line indicating a distance from the vehicle.

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