JPS6190300A - Traffic flow measuring apparatus - Google Patents
Traffic flow measuring apparatusInfo
- Publication number
- JPS6190300A JPS6190300A JP21186784A JP21186784A JPS6190300A JP S6190300 A JPS6190300 A JP S6190300A JP 21186784 A JP21186784 A JP 21186784A JP 21186784 A JP21186784 A JP 21186784A JP S6190300 A JPS6190300 A JP S6190300A
- Authority
- JP
- Japan
- Prior art keywords
- vehicle
- traffic flow
- brightness
- image
- measurement
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Traffic Control Systems (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
(1)技術分野
本発明は道路上を走行する車輌の交通流計ホU装置に関
するもので、殊に夜間あるいはトンネル内や濃震発生等
にょシ走行する車輌の映像を捕捉することが困難な路上
環境における車速、交通量等のいわゆる交通流パラ〆−
りを正確に計測する場合に適している。DETAILED DESCRIPTION OF THE INVENTION (1) Technical Field The present invention relates to a traffic flow metering device for vehicles running on roads, and particularly for capturing images of vehicles running at night, in tunnels, or during strong earthquakes. So-called traffic flow parameters such as vehicle speed and traffic volume in the road environment where it is difficult to capture
Suitable for accurately measuring
(2)従来技術
路上を走行する車輌を検知して車速、交通量あるいは車
輌間隔などの交通制御に必要なパラメータを計測する交
通流計測装置として、ループ式あるいは超音波式の装置
が知られている。また車仙画像をカメラに写して撮像位
置と時刻から交通制御パラメータを計測する装置も近年
開発されて来た。(電子通信学会 宇宙、航行エレクト
ロニクス研究会 5ANE83−28 ’トンネル内に
おける監視用ITV を用いる交通流計測“金崎等1
983.10.19 )(3)従来技術の問題点
前述の従来技術においては、例えばループ式のものは路
面にループ状のアンテナを設置する事が必須の条件とな
るし、又超音波感知式のものは風による影響が大きい。(2) Prior Art Loop-type or ultrasonic-type devices are known as traffic flow measurement devices that detect vehicles traveling on the road and measure parameters necessary for traffic control such as vehicle speed, traffic volume, and vehicle spacing. There is. In addition, devices have been developed in recent years that capture traffic images on a camera and measure traffic control parameters from the imaging location and time. (IEICE Space and Navigation Electronics Study Group 5ANE83-28 'Traffic flow measurement using monitoring ITV in tunnels' Kanazaki et al. 1
983.10.19 ) (3) Problems with the prior art In the prior art described above, for example, the loop type requires a loop antenna to be installed on the road surface, and the ultrasonic sensing type requires a loop antenna to be installed on the road surface. This is greatly affected by the wind.
さらに走行車輌の映像を路側から捕捉する装置は夜間、
トンネル内あるいは濃霧中など、環境条件が変化すると
車輌画像が得られなくなるという欠点があり実用環境条
件が限定される場合が多い。Furthermore, equipment that captures images of moving vehicles from the roadside can be used at night.
This method has the disadvantage that it is no longer possible to obtain a vehicle image when environmental conditions change, such as inside a tunnel or in dense fog, and the practical environmental conditions are often limited.
(4)問題点を解決するための手段
本発明は前記の従来技術の問題点を解決する交通量計測
装置に関するもので、計測の対象となる車輌の画像の道
路上に、車輌走行方向と平行に計測線を設定し、この線
上の車輌の輝度データを抽出し計測線方向に表われる輝
度データ値の変化及び輝度パターンの変化を評価する事
によって計測線の各々について車輌存在を判定する。(4) Means for Solving the Problems The present invention relates to a traffic measurement device that solves the problems of the prior art described above. The presence of a vehicle is determined for each measurement line by setting a measurement line, extracting the brightness data of vehicles on this line, and evaluating changes in the brightness data value and changes in the brightness pattern appearing in the direction of the measurement line.
これにより、車輌画像の得られる昼間は、車輌の幅を計
測することにより、車種別の交通パラメータを得ること
が出き又、夜間、濃霧中などは、ヘッドライト、テール
ランプなどの幅を計ることにより昼間と、同様の処理方
法で目的の交通パラメータを得ることが可能となる。As a result, during the day when vehicle images can be obtained, traffic parameters for each vehicle type can be obtained by measuring the width of the vehicle, and at night or in dense fog, it is possible to obtain traffic parameters by measuring the width of headlights, tail lights, etc. This makes it possible to obtain target traffic parameters using the same processing method as during the daytime.
(5)作 用
第1図は車輌(1)の走行路(2)における撮像画面を
示すものであって、画面上の車輌走行方向に並行して配
列され、かつ画面上の車輌の幅よシも小さい間隔を有す
る複数の計測線(3)を設定する。こ\にn本の計測線
31 、32 、・・・31.・・・3n は、計測
線に直交する線分aおよびb上のそれぞれ点a1 から
点bl、a2からt) 2. @@* 、 31からi
)i、・・・anからbn を結んだ直線であって、そ
の長さは、車輌長よシも長くても短かくてもどちらでも
よい。(5) Function Figure 1 shows an image capture screen on the driving path (2) of the vehicle (1), which is arranged parallel to the vehicle traveling direction on the screen and is proportional to the width of the vehicle on the screen. A plurality of measurement lines (3) having small intervals are also set. Here, n measurement lines 31 , 32 , . . . 31 . ...3n are points a1 to bl and a2 to t on line segments a and b perpendicular to the measurement line, respectively.2. @@* , 31 to i
) A straight line connecting i, . . . an to bn, and its length may be longer or shorter than the vehicle length.
この計測線(3)に沿って画像を抽出し、同一画面にお
ける各計測線上の輝度データをグラフに描くと第2図(
a)及び第2図(b)のようになる。こ\に第2図(a
)は車輌が存在した時の模式図、第2図(b)は存在し
ないときを意味している。このようにして得られる輝度
レベルを比較すると、どの計測線上にどのようなタイミ
ングで車輌が存在したかを検知することができると共に
、車輌の幅、つまり車種をも判定することができる。If an image is extracted along this measurement line (3) and the luminance data on each measurement line on the same screen is drawn in a graph, Figure 2 (
a) and FIG. 2(b). Figure 2 (a)
) is a schematic diagram when a vehicle is present, and FIG. 2(b) is a schematic diagram when a vehicle is not present. By comparing the brightness levels obtained in this manner, it is possible to detect on which measurement line and at what timing the vehicle was present, and also to determine the width of the vehicle, that is, the type of vehicle.
又、この計測線(3)と、これの下流側の計測線(4)
により車輌の速度を計測する。Also, this measurement line (3) and the measurement line downstream of this (4)
Measure the speed of the vehicle.
(6)実施例
第3図は本発明の画像処理交通流計測装置の構成を示す
図であって、車輌の映像はカメラ(4)で撮像されこの
ビデオ信号をA/D変換装置(5)を用いてディジタル
信号に変換した後、ビデオメモリ(6)に記憶させる。(6) Embodiment FIG. 3 is a diagram showing the configuration of the image processing traffic flow measurement device of the present invention, in which an image of a vehicle is captured by a camera (4), and this video signal is sent to an A/D converter (5). After converting it into a digital signal using
次にその内容をインタフェース(7)を通じて画像処理
計測部(8)に取9出し、各計測線ごとの輝度データ値
の変化量を比較、評価して、車輌(1)が存在したか否
かを判定し、その存在を検知した場合は、車幅を算出す
る。(8)で得たデータはインタフェース(9)を介し
てプリンタに計測結果をリストとして打出ししてもよい
し、他の管制システムへ伝送してもよい。Next, the contents are sent to the image processing measurement unit (8) through the interface (7), and the amount of change in the brightness data value for each measurement line is compared and evaluated to determine whether or not the vehicle (1) was present. If it is detected, the width of the vehicle is calculated. The data obtained in (8) may be printed out as a list of measurement results on a printer via the interface (9), or may be transmitted to another control system.
次に本発明の装置におけるデータフローを第4図に示す
。車輌(1)の撮像データをディジタル化し記憶せしめ
、各計測線(31〜3n )ごとの輝度データ値の変化
量゛を評価する。車輌存在が判定されると、車幅を求め
、車種別交通量の算出を行うと共に輝度データ値の変化
量、パターンの移動量ならびに画像データ処理周期等か
ら車輌速度を算出する0
(7)発明の効果
前述のように車輌画像をその輝度データ値の変化とパタ
ーン追跡によって画像上、複数の平行する計測線上で判
定した結果を用いる事によって、車輌の幅が判定され走
行する車輌の種類(大型。Next, the data flow in the apparatus of the present invention is shown in FIG. Image data of the vehicle (1) is digitized and stored, and the amount of change in luminance data value for each measurement line (31 to 3n) is evaluated. When the presence of a vehicle is determined, the vehicle width is determined, the traffic volume by vehicle type is calculated, and the vehicle speed is calculated from the amount of change in brightness data value, the amount of movement of the pattern, the image data processing cycle, etc.0 (7) Invention As mentioned above, the width of the vehicle is determined by using the results of determining the vehicle image on multiple parallel measurement lines based on changes in the brightness data value and pattern tracking. .
−中型、小型など)を知ることができるので、車種別の
交通量を求めることができる。さらに輝度レベルを各計
測線上についてプロットして得られる輝度パターンの移
動距離と画像データの処理周期とから車速を計測し、車
間距離と併せて運転者に走行上の注意を与え安全な走行
を確保するよう管制に役立たせることができる。このよ
うな本発明の格別の効果は、夜間あるいはトンネル内を
走行する車輌の交通流計測において著しいことは明らか
である。- medium-sized, small-sized, etc.), it is possible to calculate the traffic volume by vehicle type. In addition, the vehicle speed is measured from the moving distance of the brightness pattern obtained by plotting the brightness level on each measurement line and the processing cycle of the image data, and in conjunction with the following distance, the driver is given caution when driving to ensure safe driving. It can be useful for air traffic control. It is clear that such special effects of the present invention are remarkable in measuring the traffic flow of vehicles traveling at night or in tunnels.
第1図は本発明の車輌画像と輝度データ計測線との様態
を示す図である。
第2図は複数の計測線上の輝度レベルを示すための図で
あって第2図(a)は車輌の存在するとき、第2図(b
)は車輌が存在しないときに該当する。
第3図は本発明の実施例を示す構成図である。
第4図は本発明の装置のデータ処理のフローを示す図で
ある。
1 車輌
2 走行路
3 計測線
31・・・31@・・3n:個々の計測線a:計測区間
fj ; al 、 拳@@ai 、 @@@an:計
測線との交点
b=計測区間線;bl、・・・bi、・・・bn:計測
線との交点
4、 カメラ
5 A/D変換装置
6 ビデオメモリ
7 インタフェース
8 画像計測部
9 インタフェースFIG. 1 is a diagram showing a vehicle image and a luminance data measurement line according to the present invention. FIG. 2 is a diagram for showing the brightness levels on a plurality of measurement lines.
) is applicable when there is no vehicle. FIG. 3 is a configuration diagram showing an embodiment of the present invention. FIG. 4 is a diagram showing the flow of data processing by the apparatus of the present invention. 1 Vehicle 2 Travel path 3 Measurement line 31...31@...3n: Individual measurement line a: Measurement section fj; al, Fist@@ai, @@@an: Intersection with measurement line b = Measurement section line ;bl,...bi,...bn: Intersection with measurement line 4, camera 5 A/D converter 6 video memory 7 interface 8 image measurement unit 9 interface
Claims (3)
度データを処理して交通流を計測する画像処理の手法に
よる交通流計測装置において、計測対象車輌画像の走行
路上に複数の計測線を設け、該計測線のそれぞれにおけ
る輝度データを抽出し、輝度レベル変化ならびに輝度パ
ターンを評価する事により車輌の存在を判定する手段、
前記の輝度パターンから車輻又は車燈間隔を検出し車種
を判定する手段を有し、車種別の交通量、車速などの交
通流パラメータを計測することを特徴とする交通流計測
装置。(1) In a traffic flow measuring device using an image processing method that converts the image signal of a traveling vehicle into a digital signal and processes the brightness data to measure traffic flow, multiple measurement lines are installed on the traveling road of the image of the vehicle to be measured. , means for determining the presence of a vehicle by extracting brightness data on each of the measurement lines and evaluating changes in brightness levels and brightness patterns;
A traffic flow measurement device characterized by having means for detecting a vehicle or a distance between vehicle lights from the brightness pattern and determining the vehicle type, and measuring traffic flow parameters such as traffic volume and vehicle speed for each vehicle type.
して設けられた複数の計測線のそれぞれにおいて得られ
る輝度レベルデータに基づいて車輌の幅を算出して車種
を判定する事を特徴とする特許請求の範囲第1項記載の
交通流計測装置。(2) The vehicle type is determined by calculating the width of the vehicle based on the brightness level data obtained from each of a plurality of measurement lines provided in parallel with the running direction on the running road of the vehicle image to be measured. A traffic flow measuring device according to claim 1.
して設けられた複数の計測線のそれぞれについて得られ
る輝度レベルから輝度パターンを求め、その移動量と、
撮像処理周期とから、車輌の走行速度を算出する事を特
徴とする特許請求の範囲第1項記載の交通流計測装置。(3) A brightness pattern is determined from the brightness level obtained for each of a plurality of measurement lines provided in parallel with the running direction on the running road of the measurement target vehicle image, and the amount of movement thereof is determined.
The traffic flow measuring device according to claim 1, wherein the traveling speed of the vehicle is calculated from the imaging processing cycle.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP21186784A JPS6190300A (en) | 1984-10-09 | 1984-10-09 | Traffic flow measuring apparatus |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP21186784A JPS6190300A (en) | 1984-10-09 | 1984-10-09 | Traffic flow measuring apparatus |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6190300A true JPS6190300A (en) | 1986-05-08 |
Family
ID=16612924
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP21186784A Pending JPS6190300A (en) | 1984-10-09 | 1984-10-09 | Traffic flow measuring apparatus |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6190300A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH04263400A (en) * | 1991-02-18 | 1992-09-18 | Matsushita Electric Ind Co Ltd | Vehicle movement measuring unit |
JPH0962982A (en) * | 1995-08-25 | 1997-03-07 | Ishikawajima Harima Heavy Ind Co Ltd | Vehicle type discriminating device |
-
1984
- 1984-10-09 JP JP21186784A patent/JPS6190300A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH04263400A (en) * | 1991-02-18 | 1992-09-18 | Matsushita Electric Ind Co Ltd | Vehicle movement measuring unit |
JPH0962982A (en) * | 1995-08-25 | 1997-03-07 | Ishikawajima Harima Heavy Ind Co Ltd | Vehicle type discriminating device |
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