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A method and device for acquiring a depth camera reference image

A technology of depth camera and acquisition method, which is applied in the field of acquisition of depth camera reference images, can solve the problems of increasing equipment cost, laser secondary scattering noise, etc., and achieve the effect of reducing equipment cost and avoiding laser secondary scattering noise

Active Publication Date: 2017-09-29
LENOVO (BEIJING) LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, the above method has the problem of laser secondary scattering noise: the physical properties of the actual flat plane must be a surface with a certain roughness, so that the camera will collect surface scattering, which is called "secondary scattering speckle"
At present, in order to solve the above problems, the method of horizontally moving the shooting plane can be used to suppress the secondary speckle, but when shooting horizontally, it is necessary to add guide rails and camera devices, which increases the equipment cost

Method used

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  • A method and device for acquiring a depth camera reference image
  • A method and device for acquiring a depth camera reference image
  • A method and device for acquiring a depth camera reference image

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Embodiment 1

[0059] The embodiment of the present invention provides a method for obtaining a reference image of a depth camera. This method is applied to Figure 1a Depth camera shown.

[0060] See figure 2 , The method includes:

[0061] Step 101: Use a laser emitting device and a diffractive optical element to form a speckle pattern on a reference plane.

[0062] Step 102: Use a camera to shoot and collect the speckle pattern to obtain a first reference image.

[0063] Step 103: Determine the mapping relationship between the spots in the first reference image and the white dots in the pattern of the diffractive optical element.

[0064] Step 104: According to the mapping relationship and the pattern of the diffractive optical element, simulate and synthesize the depth camera reference image.

[0065] In the embodiment of the present invention, the speckle pattern is captured by the camera device as the first reference image, and the mapping relationship between the spots in the first reference im...

Embodiment 2

[0067] The embodiment of the present invention provides a method for obtaining a reference image of a depth camera, which is applied to Figure 1a Depth shown inside the camera. See image 3 , The method includes:

[0068] Step 201: using a laser emitting device and a diffractive optical element to form a speckle pattern on the reference plane.

[0069] Figure 4 This is the pattern of the diffractive optical element of this embodiment. From Figure 4 It can be seen that the area of ​​each white dot is uniformly and regularly arranged.

[0070] Step 202: Use a camera to photograph and collect the speckle pattern to obtain a first reference image.

[0071] Figure 5 This is the first reference image obtained after shooting the speckle pattern in this embodiment. It can be considered that the spots in the first reference image have a one-to-one correspondence with the white spots of the pattern of the diffractive optical element, and there is a mapping relationship. From Figure 5 It ...

Embodiment 3

[0096] The embodiment of the present invention provides a depth camera reference image acquisition device, which can be applied to Figure 1a Depth camera shown. See Picture 9 , The device includes a first reference image acquisition module 301, a determination module 302, and a depth camera reference image acquisition module 303.

[0097] The first reference image acquisition module 301 is configured to acquire a first reference image obtained by capturing a speckle pattern formed on a reference plane by a camera device;

[0098] The determining module 302 is configured to determine the mapping relationship between the spots in the first reference image and the white dots in the pattern of the diffractive optical element;

[0099] The depth camera reference image acquisition module 303 is configured to simulate and synthesize the depth camera reference image according to the mapping relationship and the pattern of the diffractive optical element.

[0100] In the embodiment of the pre...

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Abstract

The invention discloses a method for obtaining a depth camera reference diagram, belonging to the technical field of image processing. The method comprises the following steps: forming a speckle pattern on a reference plane by adopting a laser transmitting device and a diffractive optical component; photographing and collecting the speckle pattern by adopting a photographing device to obtain a first reference diagram; determining a mapping relationship between a spot in the first reference diagram and a white point in the pattern of the diffractive optical component; and simulating and synthesizing the depth camera reference diagram according to the mapping relationship and the pattern of the diffractive optical component. According to the method and device for obtaining the depth camera reference diagram provided by the invention, the speckle pattern is photographed and collected through the photographing device and used as the first reference diagram; the mapping relationship between the spot in the first reference diagram and the white point in the pattern of the diffractive optical component is obtained; the depth camera reference diagram is simulated and synthesised according to the mapping relationship; therefore, the secondary scattering noise points of laser are effectively avoided; furthermore, other external equipment is unnecessary to increase; the equipment cost is reduced; and the invention further discloses the device for obtaining the depth camera reference diagram.

Description

Technical field [0001] The present invention relates to the technical field of image processing, in particular to a method and device for acquiring a reference image of a depth camera. Background technique [0002] At present, image processing technology is a processing behavior that processes images to meet the needs of human psychology, vision or other applications. With the development of science and technology and the continuous increase of people's desires, the application range of image processing technology is becoming more and more extensive. [0003] Depth cameras have gradually emerged as they can achieve distance measurement of three-dimensional images. One of the key technologies of existing depth cameras is to obtain reference images. According to the position of each speckle in the reference map, the space coordinate values ​​of other points in the actual space are calculated. The current method of obtaining the reference image by the depth camera is that the laser...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N13/02
Inventor 王琳
Owner LENOVO (BEIJING) LTD