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Monocular-camera-based method for measuring depth, depth field and sizes of objects

A monocular camera and depth measurement technology, applied in the field of computer vision, can solve the problems of unsuitable video surveillance system, complex mechanical structure of camera translation movement, etc., and achieve the effect of solving measurement problems

Active Publication Date: 2011-08-31
华雁智科(杭州)信息技术有限公司
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  • Abstract
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  • Application Information

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Problems solved by technology

However, the mechanical structure of the camera translation movement is complex, which is not suitable for video surveillance system applications

Method used

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  • Monocular-camera-based method for measuring depth, depth field and sizes of objects
  • Monocular-camera-based method for measuring depth, depth field and sizes of objects
  • Monocular-camera-based method for measuring depth, depth field and sizes of objects

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Embodiment Construction

[0036] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0037] figure 1 Shown is a flowchart of an embodiment of the method for measuring depth of the present invention, including:

[0038] Step 101. Collect image A for a given camera orientation and lens focal length f, that is, a given field of view;

[0039] Step 102, control the camera to rotate horizontally or vertically by an angle θ through the pan / tilt, and collect the image B; the rotation of this angle can be easily realized through the camera control command.

[0040] Step 103, such as figure 2 As shown in the camera imaging model, for object point Q, the image point in image A is Q’(x 1 ,y 1 ), use the image matching algorithm to find its corresponding image point in image B as Q”(x 2 ,y 2 ), where the origin of the image coordinates coincides with t...

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Abstract

The invention discloses a monocular-camera-based method for measuring depth. In the method, the depth information of a static object is measured rotationally by utilizing a cloud deck. The method comprises the following steps of: collecting an image under the condition of the given azimuth of a camera and the given focal length of a lens; controlling the camera to rotate an angle horizontally or vertically by the cloud deck, and collecting an image again; finding matched image points in the two images by an image matching algorithm; and calculating the depth of object points corresponding to the image points. The invention also discloses a monocular-camera-based method for measuring a depth field, and a system device for measuring in a monocular-camera-based method for measuring the depth and sizes of motion targets. The method is suitable for a large number of ordinary video monitoring cameras with rotary cloud decks which are installed at present, so that the measurement of the depth and actual sizes of objects is realized, and the measurement problem of video monitoring is solved effectively.

Description

technical field [0001] The invention belongs to the field of computer vision, and relates to a method for measuring the depth of an object to be photographed according to the pan-tilt rotation and lens zoom of a monocular camera, corresponding to the depth field of the field of view and the actual size of the object to be photographed. Background technique [0002] With the continuous development of multimedia technology, intelligent video surveillance has been more and more widely used in fields such as safe operation and security precautions. A large number of cameras with pan / tilt lens control are installed in the current video surveillance system, especially the integrated camera with spherical pan / tilt lens. The focal length of the lens realizes zooming, but the depth (that is, the distance from the camera) and the size of the subject (or scene) cannot be directly measured with these cameras. Scene depth is useful information, which can be used for object recognition a...

Claims

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Application Information

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IPC IPC(8): G01B11/22G01B11/24G01B11/00H04N7/18H04N5/232G06T7/20
Inventor 唐慧明胡铮支晨蛟
Owner 华雁智科(杭州)信息技术有限公司
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