Method and system for camera control with monitoring area view
First Claim
Patent Images
1. A method of camera control with monitoring area view comprising the steps of:
- displaying a monitoring area view in which an installation position of a camera unit, a home position of the camera unit, a pick-up subject, and a sight field direction of the camera unit is displayed on a portion of a monitor screen for displaying an image picked up by the camera unit;
inputting a point on the monitoring area view with a point input unit, the point being the installation position of the camera unit as an origin;
inputting a home point indicative of a home position direction of the camera unit with the point input unit;
setting a line defined by the installation position of the camera unit and the home position direction thereof to be a virtual line (0°
);
inputting a monitoring point on the monitoring area view with the point input unit;
obtaining a monitoring point angle θ
a, which is defined as an angle between a line passing through a designated monitoring point and the origin, and the virtual line (0°
);
causing revolution of the camera unit by an amount equal to the monitoring point angle θ
a;
establishing a monitoring prohibition area to be excluded from the image picked up by the camera unit;
limiting the monitoring point angle θ
a to exclude the monitoring prohibition area from the camera image;
reading out present camera picture angle data θ
r from the camera unit;
obtaining an angle θ
d by adding one half the camera picture angle θ
r to the monitoring point angle θ
a; and
sending out the data of the monitoring point angle θ
a to the camera unit when the angle θ
d is below an angle θ
c of a boundary with the monitoring prohibition area while sending out an angle obtained as a result of subtraction of the one half the camera picture angle θ
r from the boundary angle θ
c as corrected monitoring point angle θ
a'"'"' to the camera unit when the angle θ
d is above the angle θ
c of the boundary with the monitoring prohibition area.
1 Assignment
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Accused Products
Abstract
A method of and a system of camera control are shown, in which a monitoring area view 2 is displayed on a monitor screen 1a. An installation position A of a camera unit 5 is input as origin A on the monitoring area view 2 with a point input unit 4. Further, a point B indicative of the home position direction of the camera unit 5 is input from the point input unit 4. A line connecting the pick-up position A of the camera unit and home position direction B thereof are set to be a virtual line C (0°); and a monitoring point X is input on the monitoring area view with the point input unit 4 to obtain a monitoring point angle θa which is defined by the designated monitoring point X, the origin A and the virtual line C. The camera unit 5 is caused to undergo revolution by the monitoring point angle θa.
89 Citations
4 Claims
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1. A method of camera control with monitoring area view comprising the steps of:
-
displaying a monitoring area view in which an installation position of a camera unit, a home position of the camera unit, a pick-up subject, and a sight field direction of the camera unit is displayed on a portion of a monitor screen for displaying an image picked up by the camera unit; inputting a point on the monitoring area view with a point input unit, the point being the installation position of the camera unit as an origin; inputting a home point indicative of a home position direction of the camera unit with the point input unit; setting a line defined by the installation position of the camera unit and the home position direction thereof to be a virtual line (0°
);inputting a monitoring point on the monitoring area view with the point input unit; obtaining a monitoring point angle θ
a, which is defined as an angle between a line passing through a designated monitoring point and the origin, and the virtual line (0°
);causing revolution of the camera unit by an amount equal to the monitoring point angle θ
a;establishing a monitoring prohibition area to be excluded from the image picked up by the camera unit; limiting the monitoring point angle θ
a to exclude the monitoring prohibition area from the camera image;reading out present camera picture angle data θ
r from the camera unit;obtaining an angle θ
d by adding one half the camera picture angle θ
r to the monitoring point angle θ
a; andsending out the data of the monitoring point angle θ
a to the camera unit when the angle θ
d is below an angle θ
c of a boundary with the monitoring prohibition area while sending out an angle obtained as a result of subtraction of the one half the camera picture angle θ
r from the boundary angle θ
c as corrected monitoring point angle θ
a'"'"' to the camera unit when the angle θ
d is above the angle θ
c of the boundary with the monitoring prohibition area. - View Dependent Claims (2, 3)
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4. A system for camera control with monitoring area view comprising:
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a camera unit capable of being revolved vertically and horizontally according to a predetermined control signal, and of converting a video input signal into a picture signal; a monitor having a monitor screen for displaying the picture signal from the camera unit; a point input unit for designating a desired point on the monitor screen; and a controller connected to the camera unit, the monitor, and the point input unit, wherein the controller includes; drawing display means for displaying a monitoring area view on the monitor screen; input means for obtaining, from the point input unit, an installation position of the camera unit as origin thereof, a home point indicative of a home position of the camera unit, and a monitoring point on the monitoring area view; monitoring point angle calculating means for setting a line defined by the origin and the home position direction to be a virtual line (0°
), and for obtaining a monitoring point angle θ
a, which is defined as an angle between a line passing through the designated monitoring point and the origin, and the virtual line (0°
);picture angle data input means for reading out present camera picture angle data θ
r from the camera unit;angle calculating means for obtaining an angle θ
d by adding one half the camera picture angle data θ
r obtained from the picture angle data input means to the monitoring point angle θ
a;comparing means for comparing the angle θ
d obtained by the angle calculating means and an angle θ
c of a boundary with a monitoring prohibition area;corrected monitoring point angle calculating means for obtaining a corrected monitoring point angle θ
a, by subtracting one half the camera picture angle θ
r from the boundary angle θ
c when the angle θ
d is above the boundary angle θ
c; andrevolution angle data generating means for sending out the monitoring point angle θ
a and the corrected monitoring point angle θ
a'"'"' as revolution angle data DA to the camera unit.
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Specification
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- Resources
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Current AssigneeNEC Networks & System Integration Corporation (NEC Corporation)
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Original AssigneeNEC Networks & System Integration Corporation (NEC Corporation)
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InventorsNishiguchi, Ryosuke, Oyashiki, Masahiko, Kawamura, Hidenori
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Primary Examiner(s)Chin, Tommy P.
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Assistant Examiner(s)DIEP, NHON THANH
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Application NumberUS08/524,277Time in Patent Office1,105 DaysField of Search348/143-159, 348/211, 348/207, 348/369, 348/155, 348/157US Class Current348/143CPC Class CodesH04N 23/661 Transmitting camera control...H04N 23/695 Control of camera direction...H04N 7/18 Closed-circuit television [...
