JPH06205287A - Picture monitor method and device therefor - Google Patents
Picture monitor method and device thereforInfo
- Publication number
- JPH06205287A JPH06205287A JP4360115A JP36011592A JPH06205287A JP H06205287 A JPH06205287 A JP H06205287A JP 4360115 A JP4360115 A JP 4360115A JP 36011592 A JP36011592 A JP 36011592A JP H06205287 A JPH06205287 A JP H06205287A
- Authority
- JP
- Japan
- Prior art keywords
- illumination light
- image
- light intensity
- density
- brightness
- 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.)
- Granted
Links
Landscapes
- Image Input (AREA)
- Closed-Circuit Television Systems (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、監視領域の照明手段の
照明光の強度を画像情報によって自動的に制御し、監視
領域内の明るさが、例えば、昼間、夜間、夕暮時等で経
時的に変化する場合でも照度不足の影響によって生じる
検知不能や認識不能を改善し、適度な照明光強度のもと
に良好な検知結果が継続して得られるようにした画像監
視方法及び装置に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention automatically controls the intensity of illumination light of illumination means in a surveillance area according to image information so that the brightness in the surveillance area changes with time, for example, during the daytime, nighttime, and dusk. Related to an image monitoring method and device that can improve undetectability and unrecognizability caused by the effect of insufficient illuminance even when there is a temporary change, and that can continue to obtain good detection results under appropriate illumination light intensity Is.
【０００２】[0002]
【従来技術】従来、照明光の強度を制御するため、受光
素子であるＣｄＳの出力値を用いて、受光量が足りない
と判断した場合に照明を点灯する装置が提案されてい
る。2. Description of the Related Art Conventionally, in order to control the intensity of illumination light, there has been proposed a device that uses the output value of CdS, which is a light receiving element, and turns on the illumination when it is determined that the amount of received light is insufficient.
【０００３】[0003]
【発明が解決しようとする課題】従来の照明光強度制御
装置を用いて画像監視を行う場合、監視領域内の明るさ
の範囲と、視覚センサであるＣＣＤカメラから得られる
画像の見やすさや物体認識の限界との関係を予め知るこ
とによって、ＣｄＳで受光される光の量が十分であるか
どうかを判断するため、受光強度の閾値を決定しておく
ことが必要となる。また受光素子であるＣｄＳの光感知
領域は、監視領域としてのカメラ視野内であることが重
要であり、そのため、装置とカメラとの一体化または光
感知領域と監視領域が重なるような装置の位置配置が必
要となる。このため、構造が複雑となる；装置が大
型化する；等の問題点があった。When performing image monitoring using the conventional illumination light intensity control device, the range of brightness within the monitoring area, the visibility of the image obtained from the CCD camera as a visual sensor, and the object recognition. It is necessary to determine the threshold value of the received light intensity in order to determine whether or not the amount of light received by CdS is sufficient by knowing the relationship with the limit of 1 in advance. Further, it is important that the light sensing area of the CdS, which is a light receiving element, is within the field of view of the camera as a monitoring area. Therefore, the device and the camera are integrated or the position of the apparatus where the light sensing area and the monitoring area overlap. Arrangement is required. As a result, the structure becomes complicated; the device becomes large; and so on.
【０００４】従って、本発明の目的は、監視領域内の明
るさが経時的に変化する場合でも照度不足の影響によっ
て生じる検知不能や認識不能を改善し、適度な照明光強
度のもとに良好な検知結果が継続して得られるようにし
た画像監視方法及び装置を提供することにある。Therefore, an object of the present invention is to improve the undetectability and unrecognizable effect caused by the effect of insufficient illuminance even when the brightness in the monitoring area changes with time, and it is good under a proper illumination light intensity. Another object of the present invention is to provide an image monitoring method and device which can continuously obtain various detection results.
【０００５】[0005]
【課題を解決するための手段】本発明に係る画像監視法
は、光強度が連続的または段階的に可変し監視領域の明
るさの調整が可能な照明手段と、監視領域を撮像する視
覚センサと、該視覚センサから得られる画像の処理を行
う画像処理手段と、前記視覚センサから得られる画像の
明るさを測定することにより前記照明手段の照明光の強
度を検出し、前記照明手段の照明光の強度を制御する照
明光強度制御値を決定する照明光強度検出手段と、該照
明光強度検出手段により決定される照明光強度制御値に
基づき、前記照明光の強度を調整する調整信号を出力す
る照明光強度調整手段を具備してなる画像監視装置にお
いて、前記視覚センサから得られる画像を処理すること
によって濃度ヒストグラムを求めるステップと、濃度ヒ
ストグラムの画像濃度範囲における濃度データに演算処
理を施して画像の明るさを決定するステップと、画像の
明るさを照明光強度制御値に変換するステップと、照明
光強度制御値に基づき、前記照明手段から発せられる照
明光の強度を変化させるステップを含むことを特徴とし
ている。また、本発明に係る画像監視装置は、光強度が
連続的または段階的に可変し監視領域の明るさの調整が
可能な照明手段と、監視領域を撮像する視覚センサと、
該視覚センサから得られる画像の処理を行う画像処理手
段と、前記視覚センサから得られる画像の明るさを測定
することにより前記照明手段の照明光の強度を検出し前
記照明手段の照明光の強度を制御する照明光強度制御値
を決定する照明光強度検出手段と、該照明光強度検出手
段により決定される照明光強度制御値に基づき、前記照
明光の強度を調整する調整信号を発する照明光強度調整
手段を具備している。SUMMARY OF THE INVENTION An image monitoring method according to the present invention comprises an illuminating means capable of adjusting the brightness of a monitoring area by varying the light intensity continuously or stepwise, and a visual sensor for imaging the monitoring area. And an image processing unit that processes an image obtained from the visual sensor, and detects the intensity of the illumination light of the illumination unit by measuring the brightness of the image obtained from the visual sensor to illuminate the illumination unit. An illumination light intensity detection unit that determines an illumination light intensity control value that controls the intensity of light, and an adjustment signal that adjusts the intensity of the illumination light based on the illumination light intensity control value that is determined by the illumination light intensity detection unit. In an image monitoring apparatus comprising an illumination light intensity adjusting means for outputting, a step of obtaining a density histogram by processing an image obtained from the visual sensor, and an image of the density histogram The brightness data of the image by performing arithmetic processing on the density data in the intensity range, converting the brightness of the image into an illumination light intensity control value, and emitting from the illumination means based on the illumination light intensity control value. Characterized in that it comprises a step of changing the intensity of the illumination light provided. Further, the image monitoring apparatus according to the present invention, an illumination means capable of adjusting the brightness of the monitoring area by varying the light intensity continuously or stepwise, a visual sensor for imaging the monitoring area,
Image processing means for processing an image obtained from the visual sensor, and detecting the intensity of the illumination light of the illumination means by measuring the brightness of the image obtained from the visual sensor to detect the intensity of the illumination light of the illumination means. Illuminating light intensity detecting means for determining an illuminating light intensity control value for controlling the illuminating light intensity, and illuminating light emitting an adjusting signal for adjusting the intensity of the illuminating light based on the illuminating light intensity control value determined by the illuminating light intensity detecting means. Equipped with strength adjusting means.
【０００６】[0006]
【作 用】視覚センサから得られる画像を処理すること
によって濃度ヒストグラムを求め、濃度ヒストグラムの
画像濃度範囲における濃度データに演算処理を施して画
像の明るさを決定し、更に画像の明るさを照明光強度制
御値に変換し、照明光強度制御値に基づき照明手段から
発せられる照明光の強度を変化させ、適度な照明光強度
のもとに良好な検知結果を得る。[Operation] The density histogram is obtained by processing the image obtained from the visual sensor, the density data in the image density range of the density histogram is calculated to determine the brightness of the image, and the brightness of the image is illuminated. It is converted into a light intensity control value, the intensity of the illumination light emitted from the illumination means is changed based on the illumination light intensity control value, and a good detection result is obtained under an appropriate illumination light intensity.
【０００７】[0007]
【実施例】以下本発明を実施例に示す図面とともに説明
する。図１は本発明に係る画像監視方法の一実施例のフ
ローチャート、図２は本発明に係る画像監視装置の一実
施例を示す構成ブロック図である。DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings showing the embodiments. FIG. 1 is a flow chart of an embodiment of the image monitoring method according to the present invention, and FIG. 2 is a block diagram showing a configuration of an embodiment of the image monitoring apparatus according to the present invention.
【０００８】図２において、画像監視装置１は、光強度
が連続的または段階的に可変し監視領域６の明るさの調
整が可能な照明手段１０と、監視領域６を撮像するＣＣ
Ｄカメラにより構成された視覚センサ２０と、この視覚
センサ２０から得られる画像を処理することにより人の
存在や物体の移動等の検知・認識を行う画像処理手段３
０と、照明光強度検出手段４０と、照明光強度調整手段
５０を具備している。In FIG. 2, the image monitoring apparatus 1 comprises an illumination means 10 capable of adjusting the brightness of the monitoring area 6 by varying the light intensity continuously or stepwise, and a CC for imaging the monitoring area 6.
A visual sensor 20 composed of a D camera, and an image processing means 3 for detecting and recognizing the presence of a person or the movement of an object by processing an image obtained from the visual sensor 20.
0, an illumination light intensity detecting means 40, and an illumination light intensity adjusting means 50.
【０００９】このうち、前記照明光強度検出手段４０
は、前記視覚センサ２０から得られる画像の明るさを測
定することにより前記照明手段１０の照明光の強度を検
出し前記照明手段１０の照明光の強度を制御する照明光
強度制御値を決定する。このため、この照明光強度検出
手段４０は、前記視覚センサ２０から得られる画像を処
理し濃度ヒストグラムを作成する濃度ヒストグラム作成
部４１と、濃度ヒストグラムの画像濃度範囲における濃
度データと予め用意した基準濃度データとの相関を求
め、相関ピーク値の位置によって示される濃度値によっ
て画像の明るさを検出する検出部４２と、該検出部４２
により検出された画像の明るさに関する数値を、変換テ
ーブル記憶部４３のテーブルデータを用いて、前記照明
光強度調整手段５０を作動させ前記照明手段１０の照明
光の強度を制御する照明光強度制御値を決定する制御値
決定部４４を含んで構成されている。Of these, the illumination light intensity detection means 40
Detects the intensity of the illumination light of the illumination means 10 by measuring the brightness of the image obtained from the visual sensor 20, and determines the illumination light intensity control value for controlling the intensity of the illumination light of the illumination means 10. . Therefore, the illumination light intensity detection means 40 includes a density histogram creating unit 41 that processes an image obtained from the visual sensor 20 to create a density histogram, density data in an image density range of the density histogram, and a previously prepared reference density. A detection unit 42 that obtains the correlation with the data and detects the brightness of the image based on the density value indicated by the position of the correlation peak value, and the detection unit 42.
An illumination light intensity control for operating the illumination light intensity adjusting means 50 to control the intensity of the illumination light of the numerical value relating to the brightness of the image detected by using the table data of the conversion table storage unit 43. It is configured to include a control value determination unit 44 that determines a value.
【００１０】また、前記照明光強度調整手段５０は、前
記照明光強度検出手段４０により決定される照明光強度
制御値に基づき前記照明光の強度を制御する制御信号を
発する。Further, the illumination light intensity adjusting means 50 emits a control signal for controlling the intensity of the illumination light based on the illumination light intensity control value determined by the illumination light intensity detecting means 40.
【００１１】次に、画像監視方法を図１に従い説明す
る。本発明に係る画像監視方法では、前記視覚センサ２
０から得られる画像を処理することによって濃度ヒスト
グラムを求めるステップと、濃度ヒストグラムの画像濃
度範囲における濃度データに演算処理を施して画像の明
るさを決定するステップと、画像の明るさを照明光強度
制御値に変換するステップと、照明光強度制御値に基づ
き、前記照明手段１０から発せられる照明光の強度を変
化させるステップをとることによって照明光強度を制御
する。Next, the image monitoring method will be described with reference to FIG. In the image monitoring method according to the present invention, the visual sensor 2
Processing the image obtained from 0 to obtain a density histogram, determining the brightness of the image by performing processing on the density data in the image density range of the density histogram, and setting the brightness of the image to the illumination light intensity. The illumination light intensity is controlled by taking the steps of converting into the control value and the step of changing the intensity of the illumination light emitted from the illumination means 10 based on the illumination light intensity control value.
【００１２】図３、図５、図７は、視覚センサ２０によ
り撮像された室内風景例をそれぞれ示す。又図４、図
６、図８は、図３、図５、図７の各画像の濃度ヒストグ
ラムを求めた結果をそれぞれ示す。図４、図６、図８に
おいて、横軸は濃度値を示し、値０が最も暗く、値２５
５が最も明るい濃度値を示している。そして、縦軸は画
素数を示している。FIG. 3, FIG. 5, and FIG. 7 respectively show examples of indoor scenery imaged by the visual sensor 20. Further, FIGS. 4, 6, and 8 show the results of obtaining the density histograms of the images of FIGS. 3, 5, and 7, respectively. 4, 6, and 8, the horizontal axis represents the density value, where the value 0 is the darkest and the value 25
5 is the brightest density value. The vertical axis indicates the number of pixels.
【００１３】ここで、濃度ヒストグラムにおける画像濃
度範囲、即ち図４、図６、図８の山状パターンの横軸範
囲に注目すると、夕方や夜間等監視領域６内の明るさが
全体的に低下した場合の画像は図５のようになり、そし
て、この図５の画像の濃度ヒストグラムの山状パターン
は図６に示され、図４の画像の濃度ヒストグラムの山状
パターンと比較して横軸上で左方向にシフトする。又監
視領域６内の明るさが全体的に明るい場合の画像は図７
のようになり、図７の画像の濃度ヒストグラムの山状パ
ターンは図８に示され、図４の画像の濃度ヒストグラム
の山状パターンと比較して右方向にシフトする。Here, paying attention to the image density range in the density histogram, that is, the horizontal axis range of the mountain-shaped patterns in FIGS. 4, 6, and 8, the brightness in the monitoring area 6 such as in the evening or at night is totally lowered. The image in the case of doing is as shown in FIG. 5, and the mountain pattern of the density histogram of the image of FIG. 5 is shown in FIG. 6, and the horizontal axis is compared with the mountain pattern of the density histogram of the image of FIG. Shift left above. Further, an image when the brightness in the monitoring area 6 is generally bright is shown in FIG.
The peak pattern of the density histogram of the image of FIG. 7 is shown in FIG. 8, and is shifted to the right as compared with the peak pattern of the density histogram of the image of FIG.
【００１４】次に、入力画像における画像の明るさの決
定方法について、図９を参照しながら説明する。入力画
像を処理して得られる濃度ヒストグラムをｆ（ｘ）、基
準濃度データをｇ（ｘ）とし、本実施例ではｇ（ｘ）と
して、数１に示すガウシアンを用いる。Next, a method of determining the brightness of the image in the input image will be described with reference to FIG. The density histogram obtained by processing the input image is f (x), the reference density data is g (x), and in this embodiment, Gaussian shown in Formula 1 is used as g (x).
【数１】 数１のＡおよびａの値は、監視領域の平均的な明るさ
（あるいは基準とした明るさ）における濃度ヒストグラ
ムを用いて画像濃度範囲での山状パタンにガウシアンの
形が類似であると判断した場合のＡおよびａの値を用い
る。図４においては定数Ａ、ａの値として定数Ａ＝１５
００、定数ａ＝−２０の値を用いた。入力画像の明るさ
を決定する場合、図９に示すように、入力画像を処理し
て得られる濃度ヒストグラムの横軸上にｇ（ｘ）を１濃
度値づつシフトする毎にｆ（ｘ）とｇ（ｘ）との類似度
として数２により相関値Ｃfgを計算し、相関ピーク値が
示される場合の濃度値ｘ1 によって明るさを決定する。[Equation 1] The values of A and a in Equation 1 are determined to be similar in shape to Gaussian to the mountain pattern in the image density range by using the density histogram in the average brightness (or the reference brightness) of the monitoring area. The value of A and a when it did is used. In FIG. 4, the constant A, the value of the constant A = 15
The value of 00 and the constant a = -20 was used. When determining the brightness of the input image, as shown in FIG. 9, f (x) is obtained every time g (x) is shifted by one density value on the horizontal axis of the density histogram obtained by processing the input image. The correlation value C fg is calculated from Equation 2 as the similarity to g (x), and the brightness is determined by the density value x 1 when the correlation peak value is indicated.
【数２】 [Equation 2]
【００１５】次に、検出結果としての濃度値ｘ1 と、画
像の基準の明るさを示す値としての濃度値ｘ0 との距離
ｄ（＝ｘ1 −ｘ0 ）を検出し、ｄの値により照明光強度
制御用の値を決定する。尚、本実施例では、制御値と制
御結果の照明光強度において検出される画像の明るさと
の関係を予め求めておく。上記値ｄに対応する制御値の
テーブルデータを例えば次のように作成しておく。一例
として、画像の基準の明るさを７０（濃度値）、使用す
る全ての照明器具が６０Ｗ（ワット）〜滅（但し、基準
時に３０Ｗとする）まで発光強度を連続可変できる場合
には、 ・画像の明るさ（濃度値）： ０〜 １０〜 ７０〜１３０〜２５５ ・距離ｄ ： ７０〜 ６０〜 ０〜 ６０〜１８５ ・制御値（ワット） ： ６０〜 ６０〜 ３０〜 ０〜 ０ のように、画像が暗い程照明光強度が大きくなる変換テ
ーブルを用意する。Next, the distance d (= x 1 -x 0 ) between the density value x 1 as the detection result and the density value x 0 as the value indicating the standard brightness of the image is detected, and the value of d is detected. The value for controlling the illumination light intensity is determined by. In this embodiment, the relationship between the control value and the brightness of the image detected by the illumination light intensity of the control result is obtained in advance. Table data of control values corresponding to the value d is created as follows, for example. As an example, if the standard brightness of the image is 70 (density value) and all the luminaires used are capable of continuously varying the emission intensity from 60 W (Watt) to extinction (however, 30 W at the standard), Image brightness (density value): 0 to 10 to 70 to 130 to 255 ・ Distance d: 70 to 60 to 0 to 60 to 185 ・ Control value (watt): 60 to 60 to 30 to 0 to 0 A conversion table is prepared in which the illumination light intensity increases as the image becomes darker.
【００１６】かくして、照明光強度調整手段５０は、照
明光強度検出手段４０において生成された照明光強度制
御値に基づき、照明手段１０から発せられる光の強度を
変化させることによって照明光の制御を行う（図１０に
示すように、照明手段の発光部に流れる電流Ｉの大きさ
を変えることにより照明光の制御は容易に行なえる）。Thus, the illumination light intensity adjusting means 50 controls the illumination light by changing the intensity of the light emitted from the illumination means 10 based on the illumination light intensity control value generated by the illumination light intensity detecting means 40. This is done (as shown in FIG. 10, the illumination light can be easily controlled by changing the magnitude of the current I flowing in the light emitting portion of the illuminating means).
【００１７】[0017]
【発明の効果】以上のような本発明によれば次の効果を
奏する。視覚センサから得られる画像データを処理した
結果を用いて照明光強度を制御できるため、監視領域の
明るさを検出するための専用の明るさ検出装置が不要に
なるばかりか、画像の濃度ヒストグラムを用いて監視領
域の明るさを判断するため、照明光強度を制御した結果
の監視領域の明るさは画像監視システムにおける検知処
理や認識処理のために適切な明るさとなり、監視領域の
明るさが時間とともに変化するような場所において、画
像処理により人の存在や物体の移動を検知・認識する場
合に、照明不足の影響によって生じる検知不能や認識不
能を回避できるだけでなく、適度な照明光強度のもとに
システムが良好な検知結果あるいは認識結果を継続して
得ることが支援される。According to the present invention as described above, the following effects can be obtained. Since the illumination light intensity can be controlled using the result of processing the image data obtained from the visual sensor, not only the dedicated brightness detection device for detecting the brightness of the monitoring area is unnecessary, but also the density histogram of the image can be displayed. Since the brightness of the monitoring area is determined by using the brightness of the monitoring area as a result of controlling the illumination light intensity, the brightness of the monitoring area becomes appropriate for the detection processing and recognition processing in the image monitoring system. When detecting and recognizing the presence of a person or movement of an object by image processing in a place that changes over time, it is possible not only to avoid undetectability and unrecognition caused by the effect of insufficient lighting, but also to maintain an appropriate illumination light intensity. It is supported that the system continuously obtains good detection result or recognition result.
【図 １】本発明に係る画像監視方法の実施例を示すフ
ローチャートである。FIG. 1 is a flowchart showing an embodiment of an image monitoring method according to the present invention.
【図 ２】本発明に係る画像監視装置の実施例の構成を
示すブロック図である。FIG. 2 is a block diagram showing a configuration of an embodiment of an image monitoring apparatus according to the present invention.
【図 ３】視覚センサから得られる画像の一例を示す図
である。FIG. 3 is a diagram showing an example of an image obtained from a visual sensor.
【図 ４】図３の画像から濃度ヒストグラムを求めた結
果の表示例を示す。FIG. 4 shows a display example of a result of obtaining a density histogram from the image of FIG.
【図 ５】監視領域の明るさが変化し図３の状態より暗
くなった時に視覚センサから得られる画像の一例を示す
図である。5 is a diagram showing an example of an image obtained from the visual sensor when the brightness of the monitoring area changes and becomes darker than the state of FIG.
【図 ６】図５の画像から濃度ヒストグラムを求めた結
果の表示例を示す。6 shows a display example of a result of obtaining a density histogram from the image of FIG.
【図 ７】監視領域の明るさが変化し図３の状態より明
るくなった時に視覚センサから得られる画像の一例を示
す図である。7 is a diagram showing an example of an image obtained from the visual sensor when the brightness of the monitoring area changes and becomes brighter than in the state of FIG.
【図 ８】図７の画像から濃度ヒストグラムを求めた結
果の表示例を示す。8 shows a display example of a result of obtaining a density histogram from the image of FIG.
【図 ９】入力画像の明るさを決定する方法を示す図で
ある。FIG. 9 is a diagram showing a method for determining the brightness of an input image.
【図１０】照明手段の発光部に流れる電流Ｉの大きさを
変えることにより照明光の制御を行う回路図である。FIG. 10 is a circuit diagram for controlling the illumination light by changing the magnitude of the current I flowing through the light emitting portion of the illumination means.
６ 監視領域 １０ 照明手段 ２０ 視覚センサ ３０ 画像処理手段 ４０ 照明光強度検出手段 ５０ 照明光強度調整手段 6 Monitoring Area 10 Illuminating Means 20 Visual Sensor 30 Image Processing Means 40 Illuminating Light Intensity Detecting Means 50 Illuminating Light Intensity Adjusting Means
Claims (4)
領域の明るさの調整が可能な照明手段（１０）と、 監視領域を撮像する視覚センサ（２０）と、 該視覚センサ（２０）から得られる画像の処理を行う画
像処理手段（３０）と、 前記視覚センサ（２０）から得られる画像の明るさを測
定することにより前記照明手段（１０）の照明光の強度
を検出し、前記照明手段（１０）の照明光の強度を制御
する照明光強度制御値を決定する照明光強度検出手段
（４０）と、 該照明光強度検出手段（４０）により決定される照明光
強度制御値に基づき、前記照明光の強度を調整する調整
信号を出力する照明光強度調整手段（５０）を具備して
なる画像監視装置において、 前記視覚センサ（２０）から得られる画像を処理するこ
とによって濃度ヒストグラムを求めるステップと、 濃度ヒストグラムの画像濃度範囲における濃度データに
演算処理を施して画像の明るさを決定するステップと、 画像の明るさを照明光強度制御値に変換するステップ
と、 照明光強度制御値に基づき、前記照明手段（１０）から
発せられる照明光の強度を変化させるステップを含むこ
とを特徴とする画像監視方法。1. A illuminating means (10) capable of adjusting the brightness of a monitoring area by varying the light intensity continuously or stepwise, a visual sensor (20) for imaging the monitoring area, and the visual sensor (20). Image processing means (30) for processing the image obtained from the above), and detecting the intensity of the illumination light of the illumination means (10) by measuring the brightness of the image obtained from the visual sensor (20), Illumination light intensity detection means (40) for determining an illumination light intensity control value for controlling the intensity of the illumination light of the illumination means (10), and an illumination light intensity control value determined by the illumination light intensity detection means (40) On the basis of the above, in an image monitoring device comprising an illumination light intensity adjusting means (50) for outputting an adjustment signal for adjusting the intensity of the illumination light, the density obtained by processing the image obtained from the visual sensor (20) Hiss Gram, a step of calculating the brightness of the image by calculating the density data in the image density range of the density histogram, a step of converting the brightness of the image into an illumination light intensity control value, an illumination light intensity An image monitoring method comprising the step of changing the intensity of illumination light emitted from the illumination means (10) based on a control value.
領域の明るさの調整が可能な照明手段（１０）と、 監視領域を撮像する視覚センサ（２０）と、 該視覚センサ（２０）から得られる画像の処理を行う画
像処理手段（３０）と、 前記視覚センサ（２０）から得られる画像の明るさを測
定することにより前記照明手段（１０）の照明光の強度
を検出し前記照明手段（１０）の照明光の強度を制御す
る照明光強度制御値を決定する照明光強度検出手段（４
０）と、 該照明光強度検出手段（４０）により決定される照明光
強度制御値に基づき、前記照明光の強度を調整する調整
信号を発する照明光強度調整手段（５０）を具備してな
る画像監視装置。2. A lighting means (10) capable of adjusting the brightness of a monitoring area by varying the light intensity continuously or stepwise, a visual sensor (20) for imaging the monitoring area, and the visual sensor (20). And an image processing means (30) for processing an image obtained from (1), and detecting the intensity of the illumination light of the illumination means (10) by measuring the brightness of the image obtained from the visual sensor (20). Illumination light intensity detection means (4) that determines an illumination light intensity control value that controls the intensity of the illumination light of the illumination means (10).
0) and an illumination light intensity adjusting means (50) for issuing an adjustment signal for adjusting the intensity of the illumination light based on the illumination light intensity control value determined by the illumination light intensity detecting means (40). Image monitoring device.
ら得られる画像を処理することによって、監視領域内の
人の存在や物体の移動等を検知・認識する画像監視シス
テムにおいて、 監視領域の明るさを調整するように光強度の連続的な変
化または段階的な変化が可能な照明手段（１０）と、 前記視覚センサ（２０）から得られる画像を処理して濃
度ヒストグラムを求めるとともに、この濃度ヒストグラ
ムの画像濃度範囲における濃度データに演算処理を施し
て画像の明るさを決定し照明光強度制御値を作成する照
明光強度検出手段（４０）と、 該照明光強度検出手段（４０）から得られる照明光強度
制御値に基づき、前記照明手段（１０）が発する照明光
の強度を調整する照明光強度調整手段（５０）を具備し
てなる画像監視装置。3. An image monitoring system for detecting and recognizing the presence of a person, movement of an object, etc. in a monitoring area by processing an image obtained from a visual sensor (20) for imaging the monitoring area. An illumination means (10) capable of continuously changing or stepwise changing the light intensity so as to adjust the brightness, and an image obtained from the visual sensor (20) are processed to obtain a density histogram. From the illumination light intensity detection means (40), which performs arithmetic processing on the density data in the image density range of the density histogram to determine the brightness of the image to create the illumination light intensity control value, and the illumination light intensity detection means (40) An image monitoring apparatus comprising an illumination light intensity adjusting means (50) for adjusting the intensity of the illumination light emitted by the illumination means (10) based on the obtained illumination light intensity control value.
ヒストグラムを作成する濃度ヒストグラム作成部（４
１）と、 濃度ヒストグラムの画像濃度範囲における濃度データと
予め用意した基準濃度データとの相関を求め、相関ピー
ク値の位置によって示される濃度値によって画像の明る
さを検出する検出部（４２）と、 該検出部（４２）により検出された画像の明るさに関す
る数値を、変換テーブル記憶部（４３）のテーブルデー
タを用いて、前記照明光強度調整手段（５０）を作動さ
せ前記照明手段（１０）の照明光の強度を制御する照明
光強度制御値を決定する制御値決定部（４４）を含んで
なる請求項２又は３記載の画像監視装置。4. A density histogram creating section (4), wherein said illumination light intensity detecting means (40) processes an image obtained from said visual sensor (20) to create a density histogram.
1) and a detection unit (42) for obtaining the correlation between the density data in the image density range of the density histogram and the previously prepared reference density data, and detecting the brightness of the image by the density value indicated by the position of the correlation peak value. The numerical value relating to the brightness of the image detected by the detection section (42) is operated by using the table data of the conversion table storage section (43) to activate the illumination light intensity adjusting means (50). The image monitoring device according to claim 2 or 3, further comprising a control value determining unit (44) that determines an illumination light intensity control value for controlling the intensity of the illumination light.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP36011592A JP3385475B2 (en) | 1992-12-29 | 1992-12-29 | Image monitoring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP36011592A JP3385475B2 (en) | 1992-12-29 | 1992-12-29 | Image monitoring device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06205287A true JPH06205287A (en) | 1994-07-22 |
| JP3385475B2 JP3385475B2 (en) | 2003-03-10 |
Family
ID=18467970
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP36011592A Expired - Fee Related JP3385475B2 (en) | 1992-12-29 | 1992-12-29 | Image monitoring device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3385475B2 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002298132A (en) * | 2001-04-02 | 2002-10-11 | Fuji Mach Mfg Co Ltd | Image pick-up system, image pick-up system control program, and electric component fitting system |
| JP2007194988A (en) * | 2006-01-20 | 2007-08-02 | Atsumi Electric Co Ltd | Built-in lighting camera |
| JP2011091641A (en) * | 2009-10-22 | 2011-05-06 | Taisei Corp | Monitor camera system, monitor camera, optical environment adjuster and optical environment adjustment method |
| JP2011205552A (en) * | 2010-03-26 | 2011-10-13 | Hitachi Kokusai Electric Inc | Monitoring camera system |
| CN116963361A (en) * | 2023-09-15 | 2023-10-27 | 青岛艾德森物联科技有限公司 | Intelligent building optimization control method based on DDC controller |
-
1992
- 1992-12-29 JP JP36011592A patent/JP3385475B2/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002298132A (en) * | 2001-04-02 | 2002-10-11 | Fuji Mach Mfg Co Ltd | Image pick-up system, image pick-up system control program, and electric component fitting system |
| JP2007194988A (en) * | 2006-01-20 | 2007-08-02 | Atsumi Electric Co Ltd | Built-in lighting camera |
| JP2011091641A (en) * | 2009-10-22 | 2011-05-06 | Taisei Corp | Monitor camera system, monitor camera, optical environment adjuster and optical environment adjustment method |
| JP2011205552A (en) * | 2010-03-26 | 2011-10-13 | Hitachi Kokusai Electric Inc | Monitoring camera system |
| CN116963361A (en) * | 2023-09-15 | 2023-10-27 | 青岛艾德森物联科技有限公司 | Intelligent building optimization control method based on DDC controller |
| CN116963361B (en) * | 2023-09-15 | 2023-12-12 | 青岛艾德森物联科技有限公司 | Intelligent building optimization control method based on DDC controller |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3385475B2 (en) | 2003-03-10 |
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