CN109738157A - Field angle detection method, device and the readable storage medium storing program for executing of structured light projection device - Google Patents
Field angle detection method, device and the readable storage medium storing program for executing of structured light projection device Download PDFInfo
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- CN109738157A CN109738157A CN201811512630.1A CN201811512630A CN109738157A CN 109738157 A CN109738157 A CN 109738157A CN 201811512630 A CN201811512630 A CN 201811512630A CN 109738157 A CN109738157 A CN 109738157A
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Abstract
The invention discloses a kind of field angle detection methods of structured light projection device, include: step 1: structured light projection device projects infrared light spot to projection plane, infrared camera obtains light spot image to projection plane shooting infrared light spot, wherein, central optical axis coincides between structured light projection device and infrared camera and central optical axis is each perpendicular to projection plane；Step 2: along central optical axis direction moving structure light projectors and/or infrared camera, so that the hot spot coincident of infrared light spot is in the image border of light spot image；Step 3: the second distance H of the first distance h and/or infrared camera of measurement structure light projectors to projection plane to projection plane；Step 3: according to first distance h and second distance H, calculating field angle α=2*atan [(H/h) * tan (θ/2)] of structured light projection device, wherein θ is the field angle of infrared camera.The field angle detection method is capable of detecting when the field angle size of structured light projection device, facilitates subsequent to the progress quality control of structure optical mode group.
Description
Technical field
The present invention relates to structure optical arena more particularly to a kind of field angle detection method of structured light projection device, device and
Readable storage medium storing program for executing.
Background technique
As Apple Inc. uses Face ID technology on intelligent terminal, recognition of face, 3D are done using structure optical mode group
Sensing and VR equipment etc. will become following mainstream.Structure optical mode group mainly includes structured light projection device and infrared camera,
Structured light projection device, which is responsible for projecting infrared light spot to subject, to be scanned, and infrared camera is responsible for being projected onto object
Infrared light spot on body is shot, and then, back-end processor parses the light spot image taken by Processing Algorithm, to obtain
Take the three-dimensional data of subject.Wherein, whether the field angle of structured light projection device and the field angle of structure light video camera head match,
Can entire shooting picture be directly influenced be completely covered infrared light spot, for structure optical mode group using most important.
Summary of the invention
In order to solve above-mentioned the deficiencies in the prior art, the present invention provides a kind of field angle detection of structured light projection device, dress
It sets and readable storage medium storing program for executing.The field angle detection method is capable of detecting when the field angle size of structured light projection device, facilitates subsequent
Quality control is carried out to structure optical mode group.
The technical problems to be solved by the invention are achieved by the following technical programs:
A kind of field angle detection method of structured light projection device, comprising:
Step 1: structured light projection device projects infrared light spot to projection plane, and infrared camera shoots infrared light spot to projection plane
Obtain light spot image, wherein central optical axis coincides between structured light projection device and infrared camera and central optical axis is vertical
In projection plane；
Step 2: along central optical axis direction moving structure light projectors and/or infrared camera, so that the hot spot side of infrared light spot
Edge coincides with the image border of light spot image；
Step 3: the of the first distance h and/or infrared camera of measurement structure light projectors to projection plane to projection plane
Two distance H；
Step 3: according to first distance h and second distance H, calculating field angle α=2*atan [(H/h) * of structured light projection device
Tan (θ/2)], wherein θ is the field angle of infrared camera.
Further, projection plane is light transmission curtain, and in step 1, structured light projection device is located at the side of light transmission curtain,
To project infrared light spot in the one side of light transmission curtain, infrared camera is located at the other side of light transmission curtain, with from light transmission curtain
Another side photographs infrared light spot.
Further, in step 3, first distance h and/or second distance H is measured by laser distance measurement method.
A kind of visual field angle detecting device of structured light projection device, comprising:
Projection plane, for receiving the infrared light spot of structured light projection device projection；
Infrared camera, the infrared light spot for shooting on projection plane obtain light spot image, wherein structured light projection device and red
Central optical axis coincides between outer camera and central optical axis is perpendicular to projection plane；
Mobile module is used for along optical axis direction moving structure light projectors and/or infrared camera, so that the hot spot of infrared light spot
Coincident is in the image border of light spot image；
Range finder module, the first distance h and/or infrared camera for obtaining structured light projection device to projection plane are flat to projection
The second distance H in face；
Computing module, for calculating field angle α=2*atan of structured light projection device according to first distance h and second distance H
[(H/h) * tan (θ/2)], wherein θ is the field angle of infrared camera.
Further, projection plane is light transmission curtain, and structured light projection device is located at the side of light transmission curtain, with to light transmission curtain
Infrared light spot is projected in the one side of cloth, infrared camera is located at the other side of light transmission curtain, from the another side of light transmission curtain
Shoot infrared light spot.
Further, the range finder module is laser ranging module.
A kind of readable storage medium storing program for executing, stores the computer program executed for processor, and the computer program is described
When processor executes, the processor carries out following steps:
Read the light spot image that infrared camera is shot；
Drive mobile module along optical axis direction moving structure light projectors and/or infrared camera, so that the hot spot of infrared light spot
Coincident is in the image border of light spot image；
The first distance h and/or infrared camera for driving range finder module measurement structure light projector to projection plane are flat to projection
The second distance H in face；
It drives computing module according to first distance h and second distance H, calculates field angle α=2*atan of structured light projection device
[(H/h) * tan (θ/2)], wherein θ is the field angle of infrared camera.
The invention has the following beneficial effects: the field angles that the field angle detection method is capable of detecting when structured light projection device
Size, in assembling structure optical mode group, can come to throw structure light according to the field angle of the infrared camera in structure optical mode group
Shadow device is screened, unmatched to prevent there is field angle between the structured light projection device and infrared camera in structure optical mode group
Problem plays the purpose of quality control.
Detailed description of the invention
The step of Fig. 1 is field angle detection method provided by the invention is schemed；
Fig. 2 is the schematic diagram of visual field angle detecting device provided by the invention；
The execution block diagram of Fig. 3 readable storage medium storing program for executing provided by the invention.
Specific embodiment
The present invention will be described in detail with reference to the accompanying drawings and examples.
Embodiment one
As shown in Figure 1, a kind of field angle detection method of structured light projection device 101, comprising:
Step 1: as shown in Fig. 2, structured light projection device 101 to projection plane 103 project infrared light spot, infrared camera 102 to
Projection plane 103 shoots infrared light spot and obtains light spot image, wherein between structured light projection device 101 and infrared camera 102
Heart optical axis coincides and central optical axis is each perpendicular to projection plane 103；
In the step 1, projection plane 103 is light transmission curtain, and structured light projection device 101 is located at the side of light transmission curtain, with to
Infrared light spot is projected in the one side of light transmission curtain, infrared camera 102 is located at the other side of light transmission curtain, with from light transmission curtain
Another side photographs infrared light spot.
Step 2: along central optical axis direction moving structure light projectors 101 and/or infrared camera 102, so that infrared light
The hot spot coincident of spot is in the image border of light spot image；
In the step 2, the relative position between hot spot edge and image border is adjusted, fixed knot can be passed through by so that the two is coincided
The position of structure light projectors 101, the position for moving infrared camera 102, or position, the movement of fixed infrared camera 102
The position of structured light projection device 101, or the position of moving structure light projectors 101 and infrared camera 102 is realized simultaneously.
For the field angle of structured light projection device 101 there are two direction, a direction is transverse direction X, and a direction is longitudinal direction Y, if
That detect is the transverse field angle α x of structured light projection device 101, then hot spot longitudinal edge is needed to coincide with the image of light spot image
Longitudinal edge needs hot spot transverse edge to coincide with hot spot if that detect is longitudinal field angle α y of structured light projection device 101
The image transverse edge of image.
Step 3: the first distance h and/or infrared camera 102 of measurement structure light projectors 101 to projection plane 103 are arrived
The second distance H of projection plane 103；
In the step 3, if the position of structured light projection device 101 or infrared camera 102 is fixed, first distance h or second
Distance H is known fixed value, can be previously written in the algorithm of test software, if structured light projection device 101 or infrared camera
102 it is position-movable, then pass through laser distance measurement method measure first distance h or second distance H.
If that detect is the transverse field angle α x of structured light projection device 101, measurement hot spot longitudinal edge is needed to coincide with light
First distance hx and/or second distance Hx when the image longitudinal edge of spot image, if detection is structured light projection device 101
Longitudinal field angle α y, then first distance hy when measurement hot spot transverse edge being needed to coincide with the image transverse edge of light spot image
And/or second distance Hy.
Step 3: according to first distance h and second distance H, calculating field angle α=2*atan of structured light projection device 101
[(H/h) * tan (θ/2)], wherein θ is the field angle (known) of infrared camera 102.
Wherein, transverse field angle α x=2*atan [(Hx/hx) * tan (θ x/2)] of structured light projection device 101, θ x are infrared
The transverse field angle of the field angle of camera 102, longitudinal field angle α y=2*atan [(Hy/hy) * of structured light projection device 101
Tan (θ y/2)], θ y is longitudinal field angle of the field angle of infrared camera 102.
The field angle detection method is capable of detecting when the field angle size of structured light projection device 101, in assembling structure light
When mould group, structured light projection device 101 can be screened according to the field angle of the infrared camera in structure optical mode group, to prevent
There is the unmatched problem of field angle between structured light projection device 101 and infrared camera in structure optical mode group, plays quality
The purpose of control.
Embodiment two
As shown in Fig. 2, a kind of visual field angle detecting device of structured light projection device 101, comprising:
Projection plane 103, for receiving the infrared light spot of the projection of structured light projection device 101；
Infrared camera 102 obtains light spot image for shooting the infrared light spot on projection plane 103, wherein structured light projection
Central optical axis coincides between device 101 and infrared camera 102 and central optical axis is perpendicular to projection plane 103；
Mobile module is used for along optical axis direction moving structure light projectors 101 and/or infrared camera 102, so that infrared light spot
Hot spot coincident in the image border of light spot image；
Range finder module arrives the first distance h and/or infrared camera of projection plane 103 for obtaining structured light projection device 101
102 arrive the second distance H of projection plane 103；
Computing module, for calculating field angle α=2* of structured light projection device 101 according to first distance h and second distance H
Atan [(H/h) * tan (θ/2)], wherein θ is the field angle of infrared camera 102.
Preferably, projection plane 103 is light transmission curtain, and structured light projection device 101 is located at the side of light transmission curtain, with to saturating
Infrared light spot is projected in the one side of light curtain cloth, infrared camera 102 is located at the other side of light transmission curtain, with from the another of light transmission curtain
Photographs infrared light spot on one side.
Preferably, the range finder module is laser ranging module.
Embodiment three
A kind of readable storage medium storing program for executing stores the computer program executed for processor, and the computer program is by the processing
When device executes, as shown in figure 3, the processor carries out following steps:
It reads infrared camera 102 and shoots obtained light spot image；
Drive mobile module along optical axis direction moving structure light projectors 101 and/or infrared camera 102, so that infrared light spot
Hot spot coincident in the image border of light spot image；
The first distance h and/or infrared camera 102 of driving range finder module measurement structure light projector to projection plane 103 are arrived
The second distance H of projection plane 103；
It drives computing module according to first distance h and second distance H, calculates field angle α=2* of structured light projection device 101
Atan [(H/h) * tan (θ/2)], wherein θ is the field angle of infrared camera 102.
Embodiments of the present invention above described embodiment only expresses, the description thereof is more specific and detailed, but can not
Therefore limitations on the scope of the patent of the present invention are interpreted as, as long as skill obtained in the form of equivalent substitutions or equivalent transformations
Art scheme should all be fallen within the scope and spirit of the invention.
Claims (7)
1. a kind of field angle detection method of structured light projection device characterized by comprising
Step 1: structured light projection device projects infrared light spot to projection plane, and infrared camera shoots infrared light spot to projection plane
Obtain light spot image, wherein central optical axis coincides between structured light projection device and infrared camera and central optical axis is vertical
In projection plane；
Step 2: along central optical axis direction moving structure light projectors and/or infrared camera, so that the hot spot side of infrared light spot
Edge coincides with the image border of light spot image；
Step 3: the of the first distance h and/or infrared camera of measurement structure light projectors to projection plane to projection plane
Two distance H；
Step 3: according to first distance h and second distance H, calculating field angle α=2*atan [(H/h) * of structured light projection device
Tan (θ/2)], wherein θ is the field angle of infrared camera.
2. the field angle detection method of structured light projection device according to claim 1, which is characterized in that projection plane is
Light curtain cloth, in step 1, structured light projection device are located at the side of light transmission curtain, infrared to project in the one side of light transmission curtain
Hot spot, infrared camera are located at the other side of light transmission curtain, with from the another side photographs infrared light spot of light transmission curtain.
3. the field angle detection method of structured light projection device according to claim 1 or 2, which is characterized in that in step 3
In, first distance h and/or second distance H is measured by laser distance measurement method.
4. a kind of visual field angle detecting device of structured light projection device characterized by comprising
Projection plane, for receiving the infrared light spot of structured light projection device projection；
Infrared camera, the infrared light spot for shooting on projection plane obtain light spot image, wherein structured light projection device and red
Central optical axis coincides between outer camera and central optical axis is perpendicular to projection plane；
Mobile module is used for along optical axis direction moving structure light projectors and/or infrared camera, so that the hot spot of infrared light spot
Coincident is in the image border of light spot image；
Range finder module, the first distance h and/or infrared camera for obtaining structured light projection device to projection plane are flat to projection
The second distance H in face；
Computing module, for calculating field angle α=2*atan of structured light projection device according to first distance h and second distance H
[(H/h) * tan (θ/2)], wherein θ is the field angle of infrared camera.
5. the visual field angle detecting device of structured light projection device according to claim 4, which is characterized in that projection plane is
Light curtain cloth, structured light projection device is located at the side of light transmission curtain, infrared to take the photograph to project infrared light spot in the one side of light transmission curtain
As head is located at the other side of light transmission curtain, with from the another side photographs infrared light spot of light transmission curtain.
6. the visual field angle detecting device of structured light projection device according to claim 4 or 5, which is characterized in that the ranging
Module is laser ranging module.
7. a kind of readable storage medium storing program for executing stores the computer program executed for processor, which is characterized in that the computer journey
When sequence is executed by the processor, the processor carries out following steps:
Read the light spot image that infrared camera is shot；
Drive mobile module along optical axis direction moving structure light projectors and/or infrared camera, so that the hot spot of infrared light spot
Coincident is in the image border of light spot image；
The first distance h and/or infrared camera for driving range finder module measurement structure light projector to projection plane are flat to projection
The second distance H in face；
It drives computing module according to first distance h and second distance H, calculates field angle α=2*atan of structured light projection device
[(H/h) * tan (θ/2)], wherein θ is the field angle of infrared camera.
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| CN201811512630.1A CN109738157A (en) | 2018-12-11 | 2018-12-11 | Field angle detection method, device and the readable storage medium storing program for executing of structured light projection device |
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| CN110426183A (en) * | 2019-07-22 | 2019-11-08 | 上海集成电路研发中心有限公司 | A kind of system and method for testing lens field angle |
| CN113760131A (en) * | 2021-08-05 | 2021-12-07 | 当趣网络科技(杭州)有限公司 | Projection touch processing method and device and computer readable storage medium |
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