JPH11272164A - Moving picture information linking system on map - Google Patents

Abstract

PROBLEM TO BE SOLVED: To link moving picture information on map data on the basis of GPS information without using any special facilities by detecting nearby points of positions on the map data to that moving pictures of respective frames correspond according to the GPS information and information on divided roads. SOLUTION: A digital moving picture information generation part 102 digitizes and divides a moving picture on roads into each frame and allocates respective pieces of GPS information to the frames to generate digital moving picture management information 10A. A map data acquisition part 103 acquires map data 20 corresponding to the roads and a road division part 104 sections the roads of the map data 20 by a specific length to divide them into segments. A nearby point detection part 105 detects nearby points of positions on the map data 20 to that the moving picture corresponds according to the GPS information and the information on the divided roads and an index data generation part 106 generates index data 30 for linking the moving pictures of the respective frames on the map data 20 according to the nearby points and records the index data in a recording part 120.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a map moving image information link system for linking a moving image, which is attribute information, to a road or river in map data and registering the moving image. GP at the time of acquisition
The present invention relates to a technology that is effective when applied to a map moving image information link system that registers and links to map data based on S (Global Positioning System) information.

[0002]

2. Description of the Related Art In general, when linking moving image information relating to roads of the map data to the map data and registering the linked moving image information, the registration is performed based on the obtained moving image information and the GPS information.

The GPS information is information indicated by latitude and longitude by detecting a position using Doppler shift of a radio wave from a GPS satellite orbiting the earth's orbit. On the other hand, the location information of the map data, as represented by the map issued by the Geographical Survey Institute,
It is represented by longitude.

[0004] The GPS information and the position information of the map data are both indicated by latitude and longitude. However, due to differences in the geodetic system, even if the latitude and longitude are the same, the position is slightly shifted. Therefore, in order to link the moving image information of the road to the map data and register the map data, the map data and the GPS
I couldn't do it by linking the information.

For this reason, in the prior art, for example,
As disclosed in Japanese Patent Application Publication No. 140080, a storage means for storing map data in a vehicle for acquiring moving image information of a road, and a G for detecting a current position of the vehicle by a GPS geodetic system.
A PS position detecting means, and a converting means for performing conversion for matching a current position detected by the GPS position detecting means with position information of a map data by a geodetic system.
There has been a method that eliminates a displacement between the PS information and the position of the map data and links the moving image information of the road to the map data.

Further, as disclosed in Japanese Patent Application Laid-Open No. 7-146351, accurate position data
Position detecting means for detecting the position of the moving object based on the S signal; error detecting means for comparing the position of the moving object detected by the GPS position detecting means to obtain an error included in the GPS signal; After the error contained in the GPS signal is obtained by the detecting means, a position correcting means is provided for calculating the position of the moving object by using data obtained by removing the error from the GPS signal for a certain period of time. Some of them detect the position on the map data.

[0007]

However, in the prior art disclosed in Japanese Patent Application Laid-Open No. 62-140080, a G indicating the current position of a vehicle for acquiring image information of a road is disclosed.
It is necessary to have a conversion table used to convert PS information into position information of map data according to the Japanese geodetic system.

In the prior art disclosed in Japanese Patent Application Laid-Open No. Hei 7-146351, a turning is performed based on a difference between the rotation speeds of a distance sensor for detecting a traveling distance of a moving body, a geomagnetic sensor, a gyro, or both left and right wheels. Equipment is required to correct the error between the coordinates on the map and the coordinates obtained by GPS, such as an azimuth sensor to detect the change in azimuth due to the movement of the moving object using a turning angular velocity sensor etc. that detects the angular velocity become.

As described above, according to the above-described prior art, when linking attribute information such as a moving image to map data, the GPS
There has been a problem that special equipment is required to eliminate the displacement between information and map data.

An object of the present invention is to provide a technique capable of linking moving image information to map data based on GPS information without using special equipment.

[0011]

SUMMARY OF THE INVENTION Among the inventions disclosed in the present application, the outline of a representative one will be briefly described.
It is as follows.

A map moving image information link system for link-registering moving image information as attribute information to a road of map data, the moving image having a road moving image and GPS information indicating a position at which the road was photographed. Moving image information acquiring means for acquiring information; converting the acquired moving image into digital image data, dividing the moving image into frames, and generating digital moving image information to which GPS information is added to each of the divided frames Digital moving image information generating means, map data obtaining means for obtaining map data corresponding to the road on which the moving image was taken, and road division for dividing the road of the obtained map data into a plurality of line segments at predetermined intervals. Means for detecting an approximate point of a position on the map data corresponding to the moving image of each frame based on the GPS information and the divided road information. Comprising means and, an index data generation means for recording and generates index data for linking on the map data a moving image of each frame based on the detected the approximate point.

Further, the approximate point detecting means indicates a position according to the GPS information in the frame of each moving image as a point on the map data, and from that point, each line segment of the road divided by the road dividing means is displayed. The vertical line is lowered, and a point at which the shortest vertical line intersects is set as an approximate point of the position of the frame on the map data.

[0014] Thus, the GP information can be obtained without using any special equipment for eliminating the positional deviation between the GPS information and the map data.
Moving image information can be linked to map data based on the S information.

[0015]

Embodiments of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is a diagram for explaining a configuration of a map moving image information link system according to an embodiment of the present invention. As shown in FIG. 1, a map moving image information link system 100 according to the present embodiment includes a moving image information 10 including a moving image of a road and GPS information indicating a position at which the moving image was taken.
Moving image information acquisition unit 101 for acquiring
Digital video information generation for converting a video obtained in response to an instruction into digital image data, dividing the video into frame units, and generating digital video information 10A to which GPS information is added for each of the divided frames Part 102
And a map data acquisition unit 103 for acquiring map data (expressed in latitude and longitude in the Japan Geodetic System represented by a map issued by the Geospatial Information Authority of Japan) 20 relating to the road on which the moving image was captured, and its acquisition. A road dividing unit 104 that divides the road of the map data 20 into a plurality of line segments at predetermined intervals according to an instruction from the input device 110, and divides an approximate point of the position on the map data 20 corresponding to the moving image into GPS information. An approximate point detecting unit 105 for detecting based on the detected road information, and index data 30 for linking a moving image of each frame to the map data 20 based on the detected approximate points,
Index generation unit 106 for recording in index data recording unit 120
And a memory 107 for storing information generated by each unit.

The moving image information acquiring unit 101 performs a process of acquiring a moving image of a road obtained by a vehicle equipped with a VTR camera and a GPS receiver and its GPS information.

The digital moving image information generating unit 102 divides the moving image of the moving image information 10 into frames at a rate of, for example, 30 frames / sec so that the moving image can be processed by a computer. Then, a process of allocating the respective GPS information to each of the divided frames and generating the digital moving image information 10A is performed. FIG. 2 shows an example of the digital moving image information 10A.

As shown in FIG. 2, digital moving image information 1
0A is, for example, a moving image frame No. 201, a distance marker 202, and position information 203 by GPS. The distance mark 202 shown here is directly assigned by the creator by the input device 110 because the road name is known. Although not shown, the system 100
May be provided with an image recognition processing unit to recognize distance markers in the moving image and automatically register the distance markers.

The position information 203 by GPS is
The latitude and longitude of the PS information are shown converted into map coordinates (x coordinate, y coordinate) that can be processed by a computer.

The map data acquisition unit 103 performs a process of acquiring the map data 20 corresponding to the road acquired by the moving image information acquisition unit 101. In the map data 20, the road position is indicated by map coordinates (x coordinate, y coordinate).

The road dividing section 104 performs a process of dividing the road of the acquired map data 20 by a predetermined length and dividing the road into a plurality of line segments. The road in the acquired map data 20 is shown in FIG.
In the case of the road 40 as shown in FIG. 5, the road is divided into, for example, equally spaced line segments AB, BC, CD, DE, EF, FG, and GH. This division method is not limited to this. For example, the division may be performed by dividing the line segment dividing the road as close to a straight line as possible, or may be performed for each distance mark.

The approximate point detecting unit 105 determines whether each of the moving image frames 2
01 indicates the approximate point of the position on the map data 20 corresponding to the GP.
A detection process is performed based on the position information 203 by S.

The detection of the approximation point is performed in each moving image frame 20.
The position according to the position information 203 by the GPS in FIG. 1 is indicated as a point on the map data 20, and a perpendicular line is dropped from the point to each line segment divided by the road dividing unit 104, and a point at which the shortest perpendicular line intersects the line segment. This is performed by setting the approximate point of the position of the moving image frame.

For example, when the position according to the position information 203 by GPS is the point G1 shown in FIG.
When the perpendiculars are respectively dropped to the line segment AB and the line segment BC, the intersection G2 with the line segment AB and the intersection G3 with the line segment BC become candidates for approximate points. Here, the shortest perpendicular is perpendicular G1G3
Therefore, the moving image frame 201 having the GPS position information 203 indicates an image at the G3 point.

The index data generation unit 106 generates index data 30 for linking a moving image of each frame to the map data 20 based on the detected approximate points, and stores the index data 30 in the index data storage unit 120. Do. This index data 3
0 has a configuration in which an index 301 is added to the above-described digital moving image information 10A as shown in FIG.

The index 301 shown here indicates the position of an approximate point on the map data 20 of each moving image frame. In the present embodiment, when the road is located between AB on the road 40 shown in FIG. R40AB ". This index 3
01 enables linking between the map data 20 and the moving image frame.

In addition, since the map data 20 also registers object information including an object name such as a road sign and a distance mark indicating the position of the object in addition to the road information,
As shown in FIG. 6, based on the distance marker, the object index data 31 is generated, for example, with the items of the object name 601 and the index 602. Thus, the link between the target on the map data 20 and each frame of the moving image in which the target is captured is performed.

Next, a link processing procedure for linking the moving image information 10 of the road to the map data 20 will be described. FIG. 7 is a flowchart showing a link processing procedure for linking the map data 20 and the moving image information 10.

As shown in FIG. 7, the link processing procedure is as follows. First, the moving image information acquisition unit 101 creates a moving image composed of a road moving image obtained by a vehicle equipped with a VTR camera and a GPS receiver and its GPS information. The image information 10 is acquired (step 701), and the digital moving image information
2 generates digital image information 10A that can be processed by a computer (step 702).

Thereafter, the map data acquisition unit 103 acquires the map data 20 corresponding to the road acquired by the moving image information acquisition unit 101 (step 703). Is divided into a plurality of line segments (step 704).

Then, the approximate point detecting unit 105 detects the position information 203 of each moving image frame 201 by GPS.
Is indicated on the map data 20 as a point, and a perpendicular line is dropped from the point to each line segment divided by the road dividing unit 104, and a point intersecting the shortest perpendicular line is an approximate point of the position of the moving image frame. In this manner, the approximate point of the position on the map data 20 corresponding to each moving image frame 201 of the digital moving image information 10A is determined by the position information 20 by GPS.
3 (step 705), and the index data generation unit 106 generates index data 30 for linking the moving image of each frame to the map data 20 based on the detected approximate points. It is stored in the storage unit 120 (Step 706).

As described above, in the map moving image information link system of this embodiment, the coordinates on the real road closest to the map data are obtained from the coordinates obtained from the GPS information, and the moving image information is linked. Therefore, it is possible to link moving image information on map data based on GPS information without using special equipment.

Further, in the prior art, even if the position information of the map data and the GPS information are corrected and the linking is performed by using a special facility, a delicate deviation that cannot be completely corrected occurs.
In some cases, linking cannot be performed on an actual road. Even in this case, if the approximate point detection according to the present invention is applied, it is possible to link a moving image to an actual road closest to the shifted point.

In the present embodiment, a case has been described in which a road of map data is linked to a moving image based on moving image information 10 that has already been acquired. It is also possible to mount the image information 10 in a vehicle that acquires the image information 10 and link the road and the moving image of the map data 20 in real time.

Further, the link of the map data to the road is not limited to only a moving image, and in the present invention, other attribute information can be similarly linked.

Further, each of the units 101 to 106 in the map moving image information link system of the present embodiment described above.
May be provided to general users as a computer program on a storage medium such as a floppy disk, CD-ROM, or mask ROM. In this case, in addition to these processes, the program may be provided to the user in combination with another program such as a GUI program.

Further, as an alternative means provided by the above-mentioned storage medium, it may be provided through a network such as the Internet for a fee.

As described above, the invention made by the present inventor is:
Although specifically described based on the embodiment, the present invention
It is needless to say that the present invention is not limited to the above-described embodiment, but can be variously modified without departing from the scope of the invention.

[0040]

The effects obtained by typical ones of the inventions disclosed in the present application will be briefly described as follows.

Since the coordinates on the real road closest to the map data are obtained from the coordinates obtained from the GPS information and the moving image information is linked, a moving image is displayed on the map data based on the GPS information without using any special equipment. It is possible to link image information.

[Brief description of the drawings]

FIG. 1 is a diagram illustrating a configuration of a map moving image information link system according to an embodiment of the present invention.

FIG. 2 is a diagram illustrating an example of digital moving image information 10A.

FIG. 3 is a diagram illustrating an example of a road for explaining a process of a road dividing unit 104;

FIG. 4 is a diagram for explaining processing of an approximate point detection unit 105;

FIG. 5 is a diagram showing a configuration example of index data 30.

FIG. 6 is a diagram showing a configuration example of object index data 31;

FIG. 7 is a flowchart showing a link processing procedure for linking the map data 20 and the moving image information 10;

[Explanation of symbols]

Reference numeral 10: moving image information, 20: map data, 30: index data, 31: object index data, 100: map moving image information link system, 101: moving image information acquisition unit, 102:
Digital moving image information generation unit, 103: map data acquisition unit, 104: road division unit, 105: approximate point detection unit, 10
6. Index data generation unit, 107 memory, 110 input device, 120 index data recording unit.

Claims (2)

[Claims] 1. A map moving image information link system for link-registering moving image information as attribute information to a road of map data, comprising a road moving image and GPS information indicating a position of the road when the moving image is photographed. Moving image information acquiring means for acquiring moving image information; digital moving image information obtained by converting the acquired moving image into digital image data, dividing the moving image into frames, and adding GPS information to each divided frame Digital video information generating means for generating the map data, map data obtaining means for obtaining map data corresponding to the road on which the moving image was captured, and dividing the road of the obtained map data into a plurality of line segments at predetermined intervals. Road division means, and an approximation for detecting an approximate point of a position on map data corresponding to the moving image of each frame based on the GPS information and information on the divided roads A map moving image, comprising: a detecting means; and index data generating means for generating and recording index data for linking a moving image of each frame to map data based on the detected approximate point. Image information link system. 2. The map moving image information link system according to claim 1, wherein the approximate point detecting means indicates a position according to GPS information in a frame of each moving image as a point on map data, and A map comprising: means for drawing a perpendicular line from a point to each line segment of the road divided by the road dividing means, and setting a point intersecting with the shortest perpendicular line as an approximate point of the position of the frame on the map data. Video information link system.