A method and device for realizing pull frame zooming in a monitoring system

A frame-drawing and zooming technology, which is applied to the components of TV systems, closed-circuit television systems, and color TVs, can solve problems affecting operational flexibility and achieve the effect of enhancing flexibility and accuracy

Inactive Publication Date: 2011-12-21
ZHEJIANG UNIVIEW TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the commands used by different manufacturers for zooming in and out and the parameters carried in the commands are different, which affects the flexibility of the operation

Method used

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  • A method and device for realizing pull frame zooming in a monitoring system
  • A method and device for realizing pull frame zooming in a monitoring system
  • A method and device for realizing pull frame zooming in a monitoring system

Examples

Experimental program
Comparison scheme
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Embodiment 1

[0030] figure 1 It is a schematic flow chart of realizing zooming in and out of a frame in a monitoring system according to Embodiment 1 of the present invention. figure 1 The devices involved include: client, server and monitoring front end. Among them: the monitoring front-end includes monitoring front-end encoder, pan-tilt, camera and other equipment, and the pan-tilt and monitoring front-end encoder can be set as an integrated machine or separated. figure 1 The flow shown includes steps 101-105:

[0031] Step 101: The user selects the zoom area in the playback pane through the client, such as figure 2 shown.

[0032] It can be pre-agreed: when the zoom area is selected from the upper left to the lower right, it means that the zoom area needs to be zoomed in, and when the zoom area is selected from the bottom right to the upper left, it means that the zoom area needs to be zoomed out. In this way, the client can pass Detect the direction of the user's pull box to deter...

Embodiment 2

[0077] As an extended application of frame zooming, the user moves the mouse to a certain position of the playback pane and clicks once, and the technical solution provided by the present invention can control the pan / tilt to move the position of the mouse to the center of the playback pane, thereby Realize the movement of the playback center point, without zooming in or zooming out the image being played.

[0078] In this embodiment, the command transfer process between the client, the server, the monitoring front-end encoder and the pan / tilt platform is the same as that in Embodiment 1. figure 1 Same, the difference is:

[0079] In step 101, the user clicks on the position that needs to be moved to the center in the playback pane;

[0080] In step 102, the zoom command sent by the client to the server only carries parameters: the coordinates of the position clicked by the user (equivalent to the coordinates of the center point of the zoom area) and the length and width of t...

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Abstract

The present invention provides a method and device for realizing frame zooming in a monitoring system. With the ranging function of the camera, the rotation angle and zoom factor of moving from the center point of the playback pane to the center point of the zoom area are calculated, and the data is calculated. This sends a rotation command and/or a zoom command to the pan/tilt, thereby accurately realizing the frame zoom function of the pan/tilt camera.

Description

technical field [0001] The invention relates to monitoring technology, in particular to a method and device for realizing zooming in and out of a frame in a monitoring system. Background technique [0002] In the monitoring system, the pan / tilt is a commonly used device, which is used to control the rotation direction of the camera or other equipment (note: only rotation, not translation). The pan / tilt can carry the camera to rotate in both horizontal and vertical directions. There are two motors installed in the cloud platform, one of which is responsible for the rotation of the horizontal direction, and the other is responsible for the rotation of the vertical direction. Among them, the angle of rotation in the horizontal direction is generally at most 350 degrees, and the angle of rotation in the vertical direction is 45 degrees, 35 degrees, 75 degrees and so on. The angles of horizontal rotation and vertical rotation can be adjusted by limit switches. [0003] The com...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N7/18H04N5/232
Inventor 黄军
Owner ZHEJIANG UNIVIEW TECH CO LTD
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