Autofocus method and system based on rgb-ir depth camera

An auto-focus and depth camera technology, applied to TV system parts, color TV parts, TVs, etc., can solve the problems of large amount of calculation and cannot auto-focus, achieve fast auto-focus, reduce calculation amount, and increase speed Effect

Active Publication Date: 2019-01-29
SHENZHEN ORBBEC CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to propose an auto-focus method and system based on a depth camera to solve the technical problems in the above-mentioned prior art that the amount of calculation is large and the auto-focus cannot be performed smoothly due to improper acquisition of depth information

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  • Autofocus method and system based on rgb-ir depth camera
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  • Autofocus method and system based on rgb-ir depth camera

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Embodiment 1

[0043] This embodiment proposes an autofocus system based on an RGB-IR depth camera, and the RGB-IR camera can simultaneously acquire visible light (RGB image) data and infrared light data. Such as figure 1 As shown, the projection module 1, the RGB-IR camera 2, the processor module 4 and the controller module 3, the projection module 1 is used to project the encoded infrared structured light pattern to the target space; the RGB-IR camera 2 is used to acquire the focus synchronously The structured light infrared image of area 5 and the RGB image of the target area, the depth camera unit and the zoom camera unit respectively obtain the depth image and the RGB image of the focus area 5; the processor unit is used to obtain the focus area 5 and the focus area in the RGB image 5 depth information; the controller module 3 is used to automatically focus the RGB-IR camera 2 according to the depth information; as image 3 As shown, the RGB-IR camera 2 includes an image sensor 21, a f...

Embodiment 2

[0053] In this example, if Image 6 As shown, according to the autofocus system based on the RGB-IR depth camera proposed in Embodiment 1, an autofocus method based on the RGB-IR depth camera is proposed. This embodiment is mainly used for single-point focusing, and can refer to the optical path Figure 8 .

[0054] Firstly, S1, using the projection module 1 to project the coded infrared structured light pattern to the target space;

[0055] The projection module 1 has different structures according to different projection structures. This embodiment uses speckle granular structured light as an example for illustration. The projection module 1 generally consists of an infrared light source, a collimator lens and a diffractive optical element (DOE). The light source is an infrared laser, which can be a single edge emitting laser light source or a vertical cavity surface emitting laser array light source. Since the light emitted by the laser light source has a certain diverg...

Embodiment 3

[0069] In this example, if Figure 7 As shown, according to the auto-focus system based on the depth camera proposed in the first embodiment, an auto-focus method based on the RGB-IR depth camera is proposed. The difference between this embodiment and the second embodiment is that this embodiment is mainly for multi-point focus.

[0070] Firstly, S1, using the projection module 1 to project the coded infrared structured light pattern to the target space;

[0071] The projection module 1 has different structures according to different projection structures. This embodiment uses speckle granular structured light as an example for illustration. The projection module 1 generally consists of an infrared light source, a collimator lens and a diffractive optical element (DOE). The light source is an infrared laser, which can be a single edge emitting laser light source or a vertical cavity surface emitting laser array light source. Since the light emitted by the laser light sourc...

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Abstract

The present invention relates to the field of autofocus, in particular to a method and a camera system that utilizes an RGB-IR depth camera to obtain depth information to achieve autofocus, and the method includes the following steps: S1: Utilize a projection module to project coded infrared to the target space Structured light pattern; S2: Use the RGB-IR camera to obtain the RGB image of the target area; S3: Obtain the focus area in the RGB image that needs to be focused; S4: According to the focus area, the depth camera intercepts only Including the depth extraction area of ​​the focus area, using the RGB-IR camera to obtain only the structured light infrared image of the depth extraction area, and calculating the depth information of the focus area according to the depth extraction area; S5: according to the depth information through the RGB ‑IR camera for autofocus. The invention can realize fast and high-precision automatic focusing on any position in the target space.

Description

technical field [0001] The invention relates to the field of autofocus, in particular to a method and a camera system for acquiring depth information by using an RGB-IR depth camera to realize autofocus. Background technique [0002] Auto-focus technology is the key to achieve high-quality images captured by the camera. Auto-focus technology is mainly divided into passive auto-focus and active auto-focus. Passive autofocus uses the sharpness of the image formed by the focused object on the image plane to focus. Generally, it needs to iterate through algorithms such as mountain climbing or gradient descent, that is, to adjust the focal length again and again until the image is the clearest. , the advantage of this method is that it does not need to use other devices, and the disadvantage is that the focusing speed is relatively slow. Active autofocus is based on the depth value of the focused object from the lens to achieve focusing. The methods used to measure the depth of ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N5/232
CPCH04N23/67
Inventor 黄源浩刘龙肖振中许星
Owner SHENZHEN ORBBEC CO LTD
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