CN1710933A - Moving-object pick-up method for monitoring system - Google Patents

Abstract

The method includes steps: (1) detecting whether the image to be monitored is moving; (2) calculating out center coordinate of the moving image; (3) magnifying the area of relevant coordinate, then taking pictures. When having detected a moving object, the method enlarges the moving part automatically in order to obtain correct image of the moving object, the invention is applicable to monitoring system.

Description

The mobile object image capture method of surveillance

(1) technical field

The invention relates to the mobile object image capture method of surveillance.

(2) background technology

Now, little in the movement of objects amount, and rather spacious place (such as underground parking, warehouse etc.) be provided with and do not need administrative staff to monitor in 24 hours, just can carry out remote (zoom out state, that is, deflated state) unmanned video recording.

But, in the middle of prior art, when carrying out the mobile object supervision in the place of spaciousness, because monitoring camera is apart from the distance of mobile object, so when the situation of effractor's infringement took place, this effractor's image was very little, so be difficult to recognize its face.

(3) summary of the invention

The present invention proposes in order to address the above problem, the object of the present invention is to provide a kind of mobile object image capture method of surveillance, this method can be amplified movable part and make a video recording when detect movement of objects automatically, thereby can obtain the accurate image of mobile object.

To achieve these goals, the mobile object image capture method of surveillance of the present invention is characterized in that comprising:

First step detects and monitors whether image moves;

Second step calculates the centre coordinate of the image that moves;

Third step, make a video recording then in certain zone of amplification corresponding coordinate.

Effect of the present invention:

The mobile object image capture method of the surveillance of the present invention that has above-mentioned formation and operate as mentioned above, can bust shot being detected the image that has the part that moves realizes monitoring, thereby can construct inspection system accurately, criminal information such as effectively avoid theft is prevented trouble before it happens.

For further specifying above-mentioned purpose of the present invention, design feature and effect, the present invention is described in detail below with reference to accompanying drawing.

(4) description of drawings

Fig. 1 is the block diagram of embodiment of the invention device.

The state diagram that Fig. 2 amplifies for the movable part image:

(a) original striograph;

(b) amplified images figure.

Fig. 3 is the synoptic chart that calculates moving coordinate:

(a) take the coordinate diagram of the original image obtain;

(b) the centre coordinate figure of the image of movable part;

(c) mobile object carries out bust shot figure.

Fig. 4 is the magnified image operation flow sheet of movable part.

The symbol description of major part in the accompanying drawing:

101, zoom lens 102, zoom lens CD-ROM drive motor

103, horizontally rotate CD-ROM drive motor 104, inclination drive motor

105, image processing portion 106, microcomputer

(5) embodiment

Below with reference to accompanying drawings embodiments of the invention are elaborated.

Fig. 1 is the block diagram of embodiment of the invention device.As shown in the figure, the mobile object camera head of surveillance of the present invention comprises:

Zoom lens 101; Zoom lens CD-ROM drive motor 102 is adjusted (the zoomout)/amplification (zoom in) of dwindling of above-mentioned zoom lens 101; Inclination (tilt) CD-ROM drive motor 104 is adjusted up and down the shooting direction of above-mentioned zoom lens 101; Horizontally rotate (pan) CD-ROM drive motor 103, the above-mentioned zoom lens 101 of left rotation and right rotation; Image processing portion 105 handles the image of above-mentioned zoom lens 101 productions; Microcomputer 106, control above-mentioned zoom lens CD-ROM drive motor 102, inclination drive motor 104, horizontally rotate CD-ROM drive motor 103, detect movable part thereby realize handling the shooting image that obtains, amplify movable part then and take from above-mentioned image processing portion 105.

With reference to Fig. 2 to Fig. 4 the operation and the action effect of embodiments of the invention with said structure are elaborated below.

The state diagram that Fig. 2 amplifies for the movable part image.Fig. 3 is the synoptic chart that calculates moving coordinate.Fig. 4 is the magnified image operation flow sheet of movable part.

At first, drive the words of monitoring camera, microcomputer 106 is in order to take the mobile object in the predefined monitor area, will control zoom lens CD-ROM drive motor 102, inclination drive motor 104, horizontally rotate CD-ROM drive motor 103, and then zoom lens 101 just can have been taken the mobile object in the predefined monitor area.

At this moment, the image of zoom lens 101 shootings is sent to microcomputer 106 by image processing portion 105.

Then, whether exist mobilely in the microcomputer 106 check filmed images, move, just calculate the coordinate that has movable part if detect to exist.

After this, microcomputer 106 is with reference to the coordinate that has movable part, control inclination drive motor 104 and horizontally rotate CD-ROM drive motor 103, thereby the shooting direction of zoom lens 101 can be moved to and the corresponding to direction in the center of moving area, thereby above-mentioned zoom lens 101 can continue to take movable part, and control convergent-divergent CD-ROM drive motor 102, make 101 pairs of moving areas of above-mentioned zoom lens amplify (zoom in), thereby can take magnified image.

Then, microcomputer 106 will be recorded a video to order and will be sent to device, video recorder, only record and move the magnified image that is detected part, perhaps record original image and magnified image continuously.

Promptly, embodiments of the invention are words that zoom lens 101 has been taken the image (image originally) shown in Fig. 2 a, whether microcomputer 106 just check exists mobile, calculate the coordinate of this moving area that moves shown in Fig. 2 a then, and control inclination drive motor 104 and horizontally rotate CD-ROM drive motor 103, make that above-mentioned zoom lens 101 can continue to take, simultaneously, control zoom lens CD-ROM drive motor 102 makes above-mentioned zoom lens 101 can take the magnified image of the movable part shown in Fig. 2 b.

In addition, referring to Fig. 3,4, will detect the coordinate Calculation method of movable part and the magnified image operation flow sheet of movable part describes to above-mentioned.

At first, do not detect under the mobile state, the centre coordinate of the image that shooting is obtained is set at (0,0) shown in Fig. 3 a, sets the coordinate of each plate then according to the size of picture.

In addition, the shooting image will dwindle (zoom out) setting state in the early stage for giving tacit consent to (default).

Then, 101 pairs of monitor areas of zoom lens are taken, take in the original image that obtains, shown in Fig. 3 a, need judge whether to detect mobile? do not move if detect to exist, operation continues the state that the initial stage of getting back to is set at deflated state acquiescence.

Move if be detected to exist, calculate the coordinate of mobile object.

At this moment, microcomputer 106 will be caught the shooting image that (capture) is detected the shooting image of mobile starting point and begins the starting point of process regular hour (such as 0.5 second) from the mobile starting point that is detected, calculate the poor of current image and original image with pixel (pixel) (noting: please check original text, what refers to) for unit then.

Then, after with plate (8*8 or 16*16) being the mean value of value of color (pixel RGB) of the redgreenblue of unit calculating pixel, if the difference of peripheral plate is for more than the value of setting arbitrarily in this value plate above with being in limit value, just think that this plate is in the critical value of mobile object, and recomputate the coordinate of this critical plate, calculate the centre coordinate of movable part then.

After this, the coordinate that obtains according to aforementioned calculation, control inclination drive motor 104 and horizontally rotate CD-ROM drive motor 103 makes the centre coordinate of image of movable part become (0,0) shown in Fig. 3 b.

That is, shine upon, make that the center of the centre coordinate (0,0) of movable part and zoom lens 101 is consistent, that is, make that shooting direction and the coordinate that calculates are consistent.

Then, microcomputer 106 control convergent-divergent CD-ROM drive motor 102, make zoom lens 101 can bust shot to movable part.

Yet,, need know the multiplying power of amplification in order to obtain the magnified image of movable part.

The coordinate of critical plate moved with the central point of movable part shine upon, use each enlargement ratio, this shooting multiplier value is set at the coordinate value bigger of the critical surface of shooting image than the maximum coordinates of the critical surface of mobile object, that is the coordinate of the critical surface of shooting image is than the multiplying power of the picture before the bigger starting point of the maximum coordinates of the critical surface of shooting image.Therefore, the enlargement ratio that zoom lens 101 just can calculate according to microcomputer 106 shown in Fig. 3 c, has carried out bust shot to mobile object, records amplified images then.

In sum, the mobile object image capture method of surveillance of the present invention comprises:

First step detects and monitors whether image moves;

Second step calculates the centre coordinate of the image that moves;

Third step, make a video recording then in certain zone of amplification corresponding coordinate.

The process that calculates the centre coordinate of the image that moves in described second step comprises:

First process calculates the shooting image that detects mobile starting point and from moving the starting point that the is detected image through the difference of the shooting image of the starting point of certain hour;

Second process, the image that aforementioned calculation is gone out is after unit is cut apart with certain plate, obtains the pixel average of each plate, the described pixel average of relatively obtaining then judges whether to arbitrarily more than the set point;

The 3rd process will be in the above plate of described set point arbitrarily and be set at critical that has mobile object, calculate the critical surface coordinate of described mobile object;

The 4th process, the critical surface coordinate of the average described mobile object that calculates, the centre coordinate of setting mobile object.

The process steps of production magnified image in the described third step comprises:

First process is shone upon, and makes that the centre coordinate of mobile object is consistent with the centre coordinate of shooting image;

Second process, described coordinate is after map operation finishes, and more whether the image of will making a video recording dwindles, and obtains the critical surface coordinate of shooting image simultaneously, be to sit target value greater than the critical surface of mobile object then;

The 3rd process begins described current critical surface coordinate to set the shooting multiplying power than the picture multiplying power before the big starting point of the critical surface coordinate of mobile object.

In addition, though top is illustrated the operation that detects when mobile, but, moving under the situation about being detected, if be judged as abnormal conditions such as the effractor occur, with regard to the bust shot mobile object, get in touch with administrative center and strick precaution center simultaneously, thereby can handle abnormal conditions timely and effectively.

Though the present invention describes with reference to current specific embodiment, but those of ordinary skill in the art will be appreciated that, above embodiment is used for illustrating the present invention, should understand and wherein can make variations and modifications and do not break away from the present invention in a broad sense, so be not as limitation of the invention, as long as in connotation scope of the present invention, all will drop in the scope of claims of the present invention variation, the distortion of the above embodiment.

Claims (3)

1, a kind of mobile object image capture method of surveillance is characterized in that comprising:

First step detects and monitors whether image moves;

Second step calculates the centre coordinate of the image that moves;

Third step, make a video recording then in certain zone of amplification corresponding coordinate.

2, the mobile object image capture method of surveillance as claimed in claim 1 is characterized in that:

The process that calculates the centre coordinate of the image that moves in described second step comprises:

First process calculates the shooting image that detects mobile starting point and from moving the starting point that the is detected image through the difference of the shooting image of the starting point of certain hour;

Second process, the image that aforementioned calculation is gone out is after unit is cut apart with certain plate, obtains the pixel average of each plate, the described pixel average of relatively obtaining then judges whether to arbitrarily more than the set point;

The 3rd process will be in the above plate of described set point arbitrarily and be set at critical that has mobile object, calculate the critical surface coordinate of described mobile object;

The 4th process, the critical surface coordinate of the average described mobile object that calculates, the centre coordinate of setting mobile object.

3, the mobile object image capture method of surveillance as claimed in claim 1 is characterized in that:

The process steps of production magnified image in the described third step comprises:

First process is shone upon, and makes that the centre coordinate of mobile object is consistent with the centre coordinate of shooting image;

Second process, described coordinate is after map operation finishes, and more whether the image of will making a video recording dwindles, and obtains the critical surface coordinate of shooting image simultaneously, be to sit target value greater than the critical surface of mobile object then;

The 3rd process begins described current critical surface coordinate to set the shooting multiplying power than the picture multiplying power before the big starting point of the critical surface coordinate of mobile object.

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