JP2010140109A - Image display device and image display method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an "image display device and image display method" displaying a camera photographic image only when the camera photographic image approaches from a really necessary direction to a registration spot. <P>SOLUTION: In the image display device for displaying on a monitor an image captured by a camera mounted on a vehicle, when the image captured by the camera is requested to be displayed on the monitor, the image is displayed on the monitor, and the location of the vehicle and the traveling direction of the vehicle when the request is made are registered. Whether or not the vehicle has reached the registered spot or around the registered spot is monitored. When the vehicle has reached, whether or not the traveling direction of the vehicle coincides with the registered vehicle traveling direction is checked. When the traveling directions match each other, the camera photographic image is displayed on the monitor instead of a navigation image. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an image display device and an image display method, and more particularly to an image display device and an image display method for displaying an image taken by a camera attached to a vehicle on a monitor.

In recent years, there has been an increasing demand for safe driving of automobiles. For this reason, various devices that support safe driving have come to be equipped in automobiles, measuring the distance between vehicles and warning when it is less than a predetermined distance, detecting driver's sleepiness and warning, Alternatively, a camera is attached to an automobile, and a scenery around the vehicle is photographed and displayed on a driver's seat display device. In the support using this camera, for example, a rear monitoring camera is attached to the vehicle, and a monitoring image of the rear of the vehicle acquired by the rear monitoring camera is displayed on a display device in the passenger compartment by a driver's operation to drive when the vehicle moves backward. Support In addition, in a vehicle equipped with such a rear monitoring camera, there has been proposed a vehicle that detects a reverse at a speed lower than a predetermined speed and automatically switches the display on the display device from a navigation screen to a rear monitoring video. Furthermore, a support system that automatically switches the display image of the monitor from the navigation image to the image taken by the rear or front monitoring camera when approaching a parking area, home, or other registered point has been proposed (Patent Document). 1). This proposed support system displays an image captured by a predetermined monitoring camera on a monitor when the user exists continuously for 10 seconds or more, for example, within 50 m from the registration point.
Japanese Patent Laid-Open No. 2005-50220

At an intersection where the prospect of entering from a narrow road to a road with a large vehicle width is poor, the driver displays the video captured by the monitoring camera attached to the front of the car on the monitor to grasp the situation of places where it is difficult to see the left and right of the intersection. In such a case, according to the above-described conventional technique, the location of the intersection is registered as a point, and when the point approaches the point, the video taken by the monitoring camera is displayed on the monitor.
However, when the vehicle crosses the intersection and approaches it, it is not necessary to display the surveillance camera image on the monitor. In the prior art, when the camera approaches the registration point, the video captured by the monitoring camera is always displayed on the monitor, and the navigation screen is unnecessarily switched from the video captured by the monitoring camera, which hinders safe driving.
Further, in the conventional technology, when the surveillance camera image is displayed on the monitor by approaching the registration point, the monitoring camera image is displayed automatically when the set point is separated from the registration point, for example, 50 m or more, or by a user operation. It was something to stop. However, even if the camera-captured video is no longer needed, it continues to be displayed until it is 50 meters away, and it is not possible to quickly return to the navigation screen, or a user's display stop operation is required, which is a problem.

Further, in the prior art, images taken by a camera are displayed by the same method regardless of the vehicle speed, and thus there is a problem that it is difficult to grasp the situation or it is difficult to see. For example, in the method of displaying a wide range of images taken with a camera, it is difficult to grasp the situation of the place where attention should be paid to driving, and when a part of the image taken with the camera should be enlarged and displayed It is difficult to determine where the range is in the real landscape.
Some automobiles are equipped with a front camera, left and right side camera, and rear camera so that the front camera, left and right side views, and back view can be displayed. There is a problem that it is not possible to cope with the display and it is not known which view should be displayed when approaching the registration point.

As described above, an object of the present invention is to display a camera-captured image only when approaching a registration point from a direction in which the display of the camera-captured image is truly necessary.
Another object of the present invention is to automatically stop displaying a camera-captured image when it is no longer necessary to display the camera-captured image.
Another object of the present invention is to display an image captured by a camera so that a driver can easily grasp the situation of a place to be careful.
Another object of the present invention is to be able to display a truly required camera shot view at a location when approaching a registered location.

The present invention is an image display method and an image display apparatus for displaying an image captured by a camera attached to a vehicle on a monitor.
Image Display Method The image display method of the present invention is a first step of displaying an image captured by a predetermined camera on a monitor when the image is requested to be displayed on the monitor, and the vehicle when the request is made. The second step of registering the point where the vehicle is located and the traveling direction of the vehicle, the third step of monitoring whether the vehicle has reached the registration point or the vicinity of the registration point, and the vehicle has reached the registration point or the vicinity of the registration point A fourth step of checking whether the traveling direction of the vehicle coincides with the registered traveling direction of the vehicle, and a fifth step of displaying an image taken by the camera on the monitor if they coincide. .
The image display method of the present invention further includes a step of selecting which camera image to display on the monitor when a camera for displaying each of the front view and the side view is attached to the vehicle. The image of the selected camera is displayed on the monitor in Step 2, the type of the selected camera is registered together with the location and the traveling direction in the second step, and the stored camera is registered in the fifth step. Display the image on the monitor.
The image display method of the present invention further stops the display of the image when a request for stopping the display of the image taken by the camera is made, and sets the vehicle position when the request is made as the display stop position. sign up.
The image display method of the present invention further stops the display of the image displayed in the fifth step when the vehicle reaches the registered display stop position.
In the image display method of the present invention, the image display step includes a step of monitoring whether the traveling speed of the vehicle is equal to or lower than the set speed, a step of displaying a wide range of images taken by the camera when the traveling speed is equal to or higher than the set speed, If the speed is lower than the set speed, a step of enlarging and displaying a partial range of the image captured by the camera is provided.

Image Display Device The image display device of the present invention includes a request unit that requests display of an image captured by a predetermined camera, a display unit that displays a camera captured image on a monitor, and a vehicle when display of the camera captured image is requested A storage unit for storing the position where the vehicle is located and the traveling direction of the vehicle, instructing the display unit to display the camera-captured image in response to a display request for the camera-captured image, and the vehicle at or near the registration point When the vehicle arrives at or near the registered point, it checks whether the traveling direction of the vehicle matches the registered traveling direction of the vehicle. And a control unit for instructing display of the camera-captured image.
The image display device of the present invention further includes a selection unit that selects which camera image to display on the monitor when a camera that displays each of the front view and the side view is attached to the vehicle. The display unit displays an image of the selected camera on a monitor, the storage unit stores the type of the selected camera together with the point and the traveling direction, and the vehicle is registered from the registered traveling direction. Alternatively, when the vicinity of the registration point is reached, the display unit displays the stored camera image on the monitor.
The image display device of the present invention further comprises means for requesting display stop of an image captured by the camera, and when the display stop request is made, the display unit stops displaying the camera captured image, The storage unit stores the vehicle position when the display stop is requested as the display stop position.
The control unit of the image display device of the present invention monitors whether the vehicle has reached the stored display stop position, and instructs the display unit to stop displaying the camera-captured image when the vehicle has reached. In addition, the control unit monitors whether the vehicle traveling speed is equal to or lower than the set speed, and when the traveling speed is equal to or higher than the set speed, the display unit displays an image of the entire range among images captured by the camera. When the speed is lower than the set speed, a partial range of the image captured by the camera is enlarged and displayed.

According to the present invention, when an image captured by a predetermined camera is requested to be displayed on the monitor, the image is displayed on the monitor, and the location where the vehicle is located and the traveling direction of the vehicle are registered, When the vehicle reaches the registered point or the vicinity of the registered point and the traveling direction of the vehicle coincides with the registered traveling direction of the vehicle, the image captured by the camera is displayed on the monitor. The camera-captured image can be displayed only when the camera-captured image is approached to the registration point from the direction in which the camera-captured image is truly necessary.
According to the present invention, when the request for stopping the display of the image taken by the camera is made, the display of the image is stopped, and the vehicle position when the request is made is registered as the display stop position. When the vehicle reaches the display stop position in a state where the photographed image is displayed on the monitor, the image display can be automatically stopped.
According to the present invention, it is monitored whether the traveling speed of the vehicle is equal to or lower than the set speed, and when the traveling speed is equal to or higher than the set speed, a wide range image captured by the camera is displayed, and the traveling speed is lower than the set speed. If this is the case, a part of the image captured by the camera is enlarged and displayed, that is, in order to narrow down the display from the overall view to the partially enlarged view according to the degree of approach, Camera captured images can be displayed so that the situation can be easily grasped.
According to the present invention, when a camera that displays each of the front view and the side view is attached to the vehicle, it is selected which image of the camera is displayed on the monitor, and the image of the selected camera is monitored. And the type of the selected camera is stored, and when the vehicle arrives at or near the registration point, the stored camera image is displayed on the monitor. You can display the camera view you really need at the point.

(A) Outline of the Present Invention FIG. 1 is a schematic explanatory view of the present invention. As shown in FIG. 1 (A), an automobile CAR is driven and an intersection with a low visibility is entered from a narrow road NRD to a road WRD having a large vehicle width. In Pc, the switch is turned on so that the image captured by the camera in front of the vehicle is displayed on the monitor of the vehicle CAR. As a result, the image display device displays an image captured by the camera in front of the vehicle on the monitor and registers the vehicle position and the traveling direction A of the vehicle when the switch is turned on. In such a state, when the vehicle arrives at or near the registered point at a later date, the image display device checks whether the traveling direction of the vehicle matches the registered vehicle traveling direction A, and matches. In other words, when the vehicle approaches the intersection Pc from the direction A shown in (A), a camera image captured by the camera in front of the vehicle is displayed on the monitor. However, as shown in (B), when the traveling direction B of the vehicle CAR is different from the registered vehicle traveling direction A, the vehicle front side even if the vehicle reaches the registered point or the vicinity of the registered point. Do not display images captured by other cameras on the monitor.

(B) Configuration of Image Display Device FIG. 2 is a configuration diagram of the image display device 1 of the present invention. The front camera 10a, the left and right side cameras 10b, 10c, and the back camera 10d attached to the vehicle take pictures of the front, left side, right side, and rear scenery of the vehicle, respectively, and store them in the camera-compatible image memories 11a to 11d. FIG. 3 is an explanatory view of the camera mounting position of the automobile, and the camera is a fisheye camera. A front camera 10a for photographing a front view (front view) FRV is attached to the front of the vehicle CAR, for example, an emblem, and the left side view (left side view) of the vehicle is mounted on the left and right sides of the vehicle, for example, the left and right door mirrors. Side cameras 10b and 10c that shoot LSV and landscape on the right side of the vehicle (right side view) RSV are attached, and a rear camera that shoots the landscape (back view) BKV behind the vehicle at the rear of the vehicle, for example, the rear license garnish. 10d is attached. In FIG. 3, the scenery of the parking lot is photographed and shown.

The AD converters 12a to 12d convert analog image data stored in the image memories 11a to 11d into digital data and input the digital data to the distortion correction units 13a to 13d. The distortion correction units 13a to 13d correct the distortion of the fisheye image captured by the fisheye camera according to the instruction from the control unit 14 and output the corrected image. The distortion correction is a well-known process for correcting a distorted portion (curve) to be an original straight line, and the control unit 14 instructs whether or not to correct the distortion.
The image processing unit 15 selects an image output from a predetermined distortion correction unit in accordance with an instruction from the control unit 14, performs necessary image processing, and stores the image in the frame memory 16. For example, when display of the entire front view is instructed from the control unit 14, the image processing unit 15 selects the front view image output from the distortion correction unit 13 a, removes unnecessary unnecessary parts, and stores it in the frame memory 16. save. Further, when the control unit 14 instructs the enlarged display of a partial range on the left and right of the front view, the image processing unit 15 cuts out a necessary part from the front view image output from the distortion correction unit 13a, and displays this part. The image is enlarged and stored in the frame memory 16. In addition, when the control unit 14 instructs to display a composite image (top view image) viewed from a viewpoint above the vehicle by combining images captured by the cameras, images output from the distortion correction units 13a to 13d. A top view image is generated using and stored in the frame memory 16.

The image reading unit 17 reads the image data stored in the frame memory 16, inputs it to the monitor 19 via the selector 18, and displays it. The selector 18 normally selects a navigation image output from the navigation device 2, but selects a camera-captured image read from the frame memory 16 according to an instruction from the control unit 14 and displays it on the monitor 19. The control unit 14 executes image display control to be described later in accordance with a user instruction input from the touch panel 20 or the operation key unit 21.
The operation key unit 21 is provided with a key (camera image changeover switch) 21a for requesting display and stop of display of a camera captured image, a key (view selection switch) 21b for instructing which camera to display the captured image, and the like. It has been. It should be noted that the camera-captured image display request and the type of view to be displayed can be input from the touch panel.

The ROM 22 stores software for image processing control, which will be described later, and various other software, and the RAM 23 includes a storage area (display control data storage area) for storing camera image display control data. When the user turns on the camera image change-over switch 21a and requests display of a camera-captured image during driving, the control unit 14 obtains the vehicle position and traveling direction when the switch is turned on from the navigation device 2, and stores the RAM. Store in the display control data storage area.
FIG. 4 shows an example of data stored in the display control data storage area. FIG. 4A shows a case where it is determined which camera's captured image is displayed when display of the camera's captured image is requested. B) is an example of a case in which display of a camera-captured image is requested and which camera-captured image is selected to be displayed.
The camera image display control data of (A) includes the vehicle position and the vehicle traveling direction when the camera image changeover switch 21a is turned on and the display of the camera shot image is requested, and the switch 21a is turned off and the camera shot image is displayed. The vehicle position (display end position) when display stop is requested is included. In addition to the data of (A), the camera image display control data of (B) further includes a camera type (view type) when a camera image to be displayed is selected by the view selection switch 21b. It is included.

(C) First Image Display Control FIG. 5 is a first image display control flow of the present invention. When display of a camera-captured image is requested, it is determined which camera's captured image is displayed ( For example, front view image display).
Normally, the selector 18 selects an image for navigation (such as a map around the vehicle) output from the navigation device 2 according to an instruction from the control unit 14 and displays it on the monitor (step 101). In such a state, the control unit 14 monitors whether the camera image changeover switch 21a is turned on and display of the camera image is requested (step 102). When the camera image changeover switch 21a is turned on, the current vehicle position at that time The vehicle traveling direction is acquired from the navigation device 2 and stored in the display control data storage area of the RAM 23 (step 103), and the image processing unit 15 is instructed to display the front view image. The vehicle traveling direction is specified by, for example, the link ID of the road link that is running or stopped when the switch is turned on, and the vehicle entry node to the link among the two nodes at both ends of the link.

When the display of the front view image is instructed, the image processing unit 15 selects the image input from the distortion correction unit 13a and displays it on the monitor 19 (step 104). In step 104, whether to display the entire front view image or an enlarged view of a portion that is difficult for the driver to see is set in advance. When displaying a partially enlarged view, for example, an enlarged view of the left and right portions of the front view image is displayed. This is because the driver often requests display of a camera-captured image because the left and right portions of the intersection when entering a wide road from a narrow road are difficult to see. FIG. 6A is an example in which the entire front view is displayed without distortion correction, and FIG. 6B is an example in which an enlarged view of the left and right portions of the front view image is displayed with distortion correction. Is preset.
Next, the control unit 24 monitors whether or not the camera image changeover switch 21a is turned off and the display stop of the camera-captured image is requested (step 105), and continues to display the front view image until it is turned off.

  When the camera image changeover switch 21a is turned off and the display stop of the photographed image is requested, the control unit 14 stores the vehicle position at the time of turning off as the display end position in the display control data storage area of the RAM 23 in step 103. The vehicle current position and the vehicle traveling direction are stored as shown in FIG. 4A (step 106). In addition, the image processing unit 15 is instructed to stop displaying the front view image, and the selector 18 is instructed to select a navigation image. Thereby, the navigation image is displayed on the monitor thereafter (step 107).

As a result of the above processing, the vehicle is driven in the state where the camera image display control data is stored in the display control data storage area of the RAM 23, and reaches the registration point or the vicinity of the registration point from the registered vehicle traveling direction. Then, the image display control device 1 automatically displays the front view image on the monitor 19. FIG. 7 is a processing flow for automatically displaying the front view image on the monitor.
Normally, the selector 18 selects and displays a navigation image output from the navigation device 2 in accordance with an instruction from the control unit 14 (step 201). In such a state, the control unit 14 uses the current vehicle position acquired from the navigation device 2 to reach the vehicle within a predetermined distance (for example, 0 to 50 m) from the registration point stored in the display control data storage area. It is monitored (step 202). If it does not reach, control is performed so as to continue displaying the navigation image. If the distance reaches within the predetermined distance range, the control unit 14 acquires the actual traveling direction of the vehicle from the navigation device 2, and the actual traveling direction is displayed and controlled. It is checked whether or not the vehicle traveling direction stored in the data storage area matches (step 203). The control unit 14 is configured to input data for specifying the vehicle traveling direction stored in the display control data storage area to the navigation device 2 to request a direction match determination and obtain a determination result. You can also.

If the actual traveling direction of the vehicle does not coincide with the registered vehicle traveling direction, the control unit 14 controls the display of the navigation image to be continued. If the vehicle traveling direction matches, the control unit 14 controls the image processing unit 15 and the selector 18 to display the front view image. Is displayed. As a result, the image processing unit 15 generates a front view image input from the distortion correction unit 13a as in step 104 of FIG. 5, and the selector 18 selects the front view image and displays it on the monitor 19 (step 204). .
Thereafter, the control unit 14 refers to the current position of the vehicle acquired from the navigation device 2 and monitors whether the display end position has been passed (step 205). If not, the control unit 14 continues to display the front view image. If it passes, the image processing unit 15 is instructed to stop displaying the front view image, and the selector 18 is instructed to select a navigation image. Thereby, the navigation image is displayed on the monitor thereafter (step 206).

(D) Second Image Display Control FIG. 8 is a processing flow for requesting display of a camera-captured image, selecting which camera's captured image (view) is to be displayed, and displaying the selected view image.
Normally, the selector 18 selects and displays a navigation image output from the navigation device 2 in accordance with an instruction from the control unit 14 (step 301). In this state, the control unit 14 monitors whether the camera image change-over switch 21a is turned on to request display of the camera image (step 302). When the camera image change-over switch 21a is turned on, the control unit 14 The vehicle current position and the vehicle traveling direction when the image changeover switch 21a is turned on are acquired from the navigation device 2 and stored in the display control data storage area of the RAM 23 (step 303).
Next, the control unit 14 checks whether a view to be displayed (front view, left side view, right side view) is selected, that is, which camera is selected to display a view (step 304). If the view to be displayed is not selected, the navigation image continues to be displayed.

When the view to be displayed is specified, the control unit 14 instructs the image processing unit 15 and the selector 18 to display the specified view image. Accordingly, the image processing unit 15 selects a predetermined image input from the distortion correction units 13a to 13c and generates a view image requested to be displayed, and the selector 18 selects the view image and displays it on the monitor 19 ( Step 305). Further, the control unit 14 sets the identified view type (camera type) in combination with the current vehicle position and the vehicle traveling direction stored in step 303 in the display control data storage area as shown in FIG. Store (step 306).
Next, the control unit 24 monitors whether or not the camera image changeover switch 21a is turned off and the display stop of the camera-captured image is requested (step 307), and continues to display the selected view image until it is turned off (step 308). . When the camera image change-over switch 21a is turned off and the display stop of the camera-captured image is requested, the control unit 14 stores the vehicle position at the time of turning off as the display end position in the display control data storage area of the RAM 23 (step 309). ) Instruct the image processing unit 15 to stop displaying the view image, and instruct the selector 18 to select the navigation image. Thereby, the navigation image is displayed on the monitor thereafter (step 310).

  With the above processing, in the state where the camera image display control data (see FIG. 4B) is stored in the display control data storage area of the RAM 23, the vehicle is driven, and the registration point is registered from the registered vehicle traveling direction. Alternatively, when the vicinity of the registration point is reached, the image display control device 1 automatically displays the registered view image on the monitor 19. FIG. 9 is a processing flow for automatically displaying a view image registered on the monitor. The same processing steps as those in FIG. 7 are given the same step numbers. The difference is that when the vehicle arrives from the registered point or the vehicle traveling direction registered in the vicinity of the registered point, the view image stored in step 306 in FIG. 8 is displayed on the monitor (step 401). .

(E) Third image display control When an image captured by a camera is displayed by the same method regardless of the vehicle speed, it is difficult to grasp or view the vehicle surroundings from the camera captured image. For example, a method for displaying a wide range of images taken with a camera is not a problem when the vehicle is traveling at a relatively high speed because it is far from the location where the vehicle should be traveled. There is a problem that it is difficult to grasp the situation when approaching and grasping the situation. In addition, in the method of enlarging and displaying a part of the image captured by the camera that should be traveled, there is a problem that it is difficult to determine where the range is in the actual scenery.

Therefore, in the present invention, it is monitored whether the traveling speed of the vehicle is equal to or lower than the set speed, and when the traveling speed is equal to or higher than the set speed, a wide range of images taken by the camera are displayed, and the traveling speed is lower than the set speed. If a point approaches or arrives, a part of the image captured by the camera is enlarged and displayed. In this way, it becomes easy to grasp the situation of the place where the driver should be careful. FIGS. 10A and 10B are explanatory diagrams of the camera-captured image display method of the present invention. FIG. 10A shows a case where a front view is displayed by a front camera, and FIG. 10B shows a case where a left side view is displayed by a left side camera.
In (A), the entire front view (intersection photographed image) photographed by the front camera 10a when the vehicle approaches, for example, a registered point (intersection with poor visibility) and the vehicle speed S becomes 15 km / h ≧ S ≧ 5 km / h. When the vehicle further approaches the intersection and the vehicle speed S becomes 5Km / h> S ≧ 0Km / h, the front view (intersection image) has a partial left / right range (left and right of the intersection with poor visibility). Is enlarged and divided on the monitor screen.
In (B), for example, when the vehicle approaches a registration point (a road point with a narrow vehicle width) and the vehicle speed S becomes 15 km / h ≧ S ≧ 5 km / h, the left side view (left side) taken by the left side camera 10b When the vehicle further approaches the registration point and the vehicle speed S becomes 5 km / h> S ≧ 0 km / h, a partial range of the left side view (one side of the vehicle: in the figure) Fence) is converted into an image seen from above the car, and enlarged and displayed on the monitor screen.
If the display is made as described above, the situation of the point where the driver should be careful about traveling is displayed as the whole view → the partial view according to the approach condition, so that it becomes easy to grasp the situation of the point where the driver should be careful about traveling.

FIG. 11 is a flow of image display processing for displaying a camera-captured image as shown in FIG.
The control unit 14 determines whether the view to be displayed is the front view or the side view (step 501). If the view is the front view, the control unit 14 acquires the vehicle speed S from the navigation device 2 and 15Km / h. It is determined whether ≧ S ≧ 5 km / h (step 502). If the vehicle speed S is not 15 km / h ≧ S ≧ 5 km / h, it is determined whether 5 km / h> S ≧ 0 km / h (step 503). Is not displayed, and it waits for the vehicle speed S to become 15 km / h ≧ S ≧ 5 km / h. However, if the vehicle speed is 5 km / h> S ≧ 0 km / h in step 503, the left and right partial range of the front view image is enlarged and divided and displayed on the monitor screen (step 504).
On the other hand, if “YES” in the step 502, the image processing unit 15 is instructed to display the entire front view image (wide front view) (step 505). Next, the control unit 14 determines whether the vehicle speed S has become a low speed of 5 km / h> S ≧ 0 km / h (step 503). If “NO”, the wide range front view display is continued. For example, the image processing unit 15 is instructed to enlarge the left and right partial range of the front view image and display it on the monitor screen (step 504).

If the view to be displayed in step 501 is the left side view, the control unit 14 acquires the vehicle speed S from the navigation device 2 and determines whether 15 Km / h ≧ S ≧ 5 Km / h (step 506). If the vehicle speed S is not 15 km / h ≧ S ≧ 5 km / h, it is determined whether 5 km / h> S ≧ 0 km / h (step 507). Without displaying the view, it waits for the vehicle speed S to be 15 km / h ≧ S ≧ 5 km / h. However, if the vehicle speed is 5 km / h> S ≧ 0 km / h in step 507, the image processing unit 15 is instructed to view a partial range (one side of the vehicle side) of the left side view image from above the vehicle. And is enlarged and displayed on the monitor screen (step 508).
On the other hand, if “YES” in the step 506, the image processing unit 15 is instructed to display the entire side view image (entire view in front of the side) (step 509). Next, the control unit 14 determines whether or not the vehicle speed S has become a low speed of 5 km / h> S ≧ 0 km / h (step 507). If “NO”, the entire side view image is continuously displayed. If there is, the image processing unit 15 is instructed to convert a partial range of the left side view image into an image viewed from above the vehicle, and enlarged and displayed on the monitor screen (step 508).

It is a schematic explanatory drawing of this invention. It is a block diagram of the image display apparatus of this invention. It is camera explanatory position explanatory drawing of a motor vehicle. It is an example of the data (camera image display control data) memorize | stored in a display control data storage area. It is a 1st image display control flow of this invention. It is an example of the front view image displayed on a monitor. It is a processing flow for automatically displaying a front view image on a monitor. This is a processing flow for requesting display of a camera-captured image, selecting which camera's captured image (view) is to be displayed, and displaying the selected view image. It is another processing flow which automatically displays a front view image on a monitor. It is explanatory drawing of the camera picked-up image display method of this invention. FIG. 10 is a flow of image display processing for displaying a camera-captured image as shown in FIG.

Explanation of symbols

CAR car
NRD narrow road
WRD wide road
Pc Intersection 1 with poor visibility Image display device 2 Navigation devices 10a to 10d Cameras 11a to 11d Camera-compatible image memories 12a to 12d AD converters 13a to 13d Distortion correction unit 14 Control unit 15 Image processing unit 16 Frame memory 17 Image reading unit 18 Selector 19 Monitor 20 Touch Panel 21 Operation Key Unit 22 ROM
23 RAM

Claims (14)

In an image display method for displaying an image taken by a camera attached to a vehicle on a monitor,
A first step of displaying an image captured by a predetermined camera on the monitor when the image is requested to be displayed on the monitor;
A second step of registering the location of the vehicle and the direction of travel of the vehicle when the request is made;
A third step of monitoring whether the vehicle has reached the registration point or the vicinity of the registration point;
A fourth step of checking whether the traveling direction of the vehicle coincides with the registered traveling direction of the vehicle when the vehicle reaches the registered point or the vicinity of the registered point;
If they match, the fifth step of displaying the image captured by the camera on the monitor;
An image display method comprising: When a camera that displays each of the front view and the side view is attached to the vehicle, a step of selecting which camera image to display on the monitor;
And displaying the image of the selected camera on the monitor in the first step, registering the type of the selected camera together with the location and the traveling direction in the second step, and in the fifth step, 2. The image display method according to claim 1, wherein the stored camera image is displayed on a monitor. A step of stopping the display of the image when a request to stop the display of the image taken by the camera is made, and registering the vehicle position when the request is made as a display stop position;
The image display method according to claim 1, further comprising: A step of stopping display of the image displayed in the fifth step when the vehicle reaches the registered display stop position;
The image display method according to claim 3, further comprising:   5. The image according to claim 4, wherein when a navigation image is displayed, the camera-captured image is displayed instead of the navigation image, and when the display of the camera-captured image is stopped, the navigation image is displayed. Display method. Displaying the image comprises:
Monitoring whether the running speed of the vehicle falls below the set speed,
A step of displaying a wide range of images taken by the camera when the traveling speed is equal to or higher than the set speed;
A step of enlarging and displaying a partial range of the image captured by the camera if the traveling speed is lower than the set speed;
The image display method according to claim 1, further comprising: When the image to be displayed is a front view at an intersection, the partial range is a left range and a right range of the intersection, and the images of these two ranges are divided and displayed.
The image display method according to claim 6. When the image to be displayed is a side view of a narrow road, the partial range is a vehicle one side part,
The image display method according to claim 6. In an image display device that displays an image taken by a camera attached to a vehicle on a monitor,
A request unit for requesting display of an image taken by a predetermined camera;
A display that displays the camera image on the monitor,
A storage unit for storing a point where the vehicle is located and a traveling direction of the vehicle when display of a camera-captured image is requested;
The display unit is instructed to display the camera-captured image by a display request of the camera-captured image, and monitors whether the vehicle has reached the registered location or the vicinity of the registered location, and the vehicle is either the registered location or the registered location. When the vehicle travels in the vicinity of the vehicle, it is checked whether the traveling direction of the vehicle matches the registered traveling direction of the vehicle, and if it matches, the control unit instructs the display unit to display the captured image of the camera,
An image display device comprising: When a camera that displays each of the front view and the side view is attached to the vehicle, a selection unit that selects which camera image to display on the monitor,
The display unit displays an image of the selected camera on a monitor, the storage unit stores the type of the selected camera together with the location and the traveling direction, and the vehicle travels in the registered traveling direction. When the registration point or the vicinity of the registration point is reached, the display unit displays the stored camera image on the monitor.
The image display device according to claim 9. Means for requesting display stop of an image taken by the camera;
When the display stop request is made, the display unit stops displaying the camera-captured image, and the storage unit stores the vehicle position when the display stop is requested as the display stop position.
The image display device according to claim 9 or 10, The control unit monitors whether the vehicle has reached the stored display stop position, and when the vehicle has reached, instructs the display unit to stop displaying the camera-captured image.
The image display apparatus according to claim 11. The display unit normally displays a navigation image on a monitor, and when the display of a camera-captured image is instructed, the display unit displays the camera-captured image instead of the navigation image and is instructed to stop displaying the camera-captured image. Display a navigation image when
The image display device according to claim 12. The control unit monitors whether the traveling speed of the vehicle is equal to or lower than a set speed, and the display unit displays an image of the entire range of images captured by the camera when the traveling speed is equal to or higher than the set speed. If the speed is lower than the set speed, a part of the image captured by the camera is enlarged and displayed.
The image display device according to claim 9 or 10,

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