CN108124152A - The distortion measurement method and system of head-mounted display apparatus - Google Patents
The distortion measurement method and system of head-mounted display apparatus Download PDFInfo
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- CN108124152A CN108124152A CN201711437454.5A CN201711437454A CN108124152A CN 108124152 A CN108124152 A CN 108124152A CN 201711437454 A CN201711437454 A CN 201711437454A CN 108124152 A CN108124152 A CN 108124152A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N17/00—Diagnosis, testing or measuring for television systems or their details
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Abstract
The invention discloses the distortion measurement method and system of a kind of head-mounted display apparatus, the distortion measurement method includes：Detection image is projected using the display eyeglass of the head-mounted display apparatus and generates projected image；The projected image is obtained using video camera；The distortion of the head-mounted display apparatus is calculated according to the projected image.By the present invention in that replace human eye with video camera, the projected image that detection image projects on head-mounted display apparatus is shot by video camera, then projected image is analyzed, so as to the distortion of head-mounted display apparatus quantified.
Description
Technical field
The invention belongs to technical field of virtual reality, the distortion measurement method of more particularly to a kind of head-mounted display apparatus and
System.
Background technology
Head-mounted display apparatus includes VR (virtual reality) glasses and AR (augmented reality) glasses, and basic principle is to pass through
It projects two virtual images respectively before the eyes of people, is imitated using the parallax of people itself so as to generate a kind of virtual visions of 3D
Fruit.As the product that an optics is dominated, optical imaging effect is most important for the user experience of VR/AR glasses.In shadow
In all kinds of factors for ringing optical imaging effect, distortion is one of them very important optical index.
In process of production, due to light path may deviation theory design, inevitably leading to imaging results can stay
There is certain distortion.In production test link, such Distortion Detect is all the method detected using artificial sampling, i.e., directly
Detect by an unaided eye imaging effect, and makes the judgement of a subjectivity.The method of obvious artificial detection is neither quick, also not square
Just, the standard of different testers also is difficult to unification, and it is even more impossible to the sizes that quantitatively distorts exactly.Simultaneously, in research and development test wrapper
In section, also lack a distortion test side that can be used for comparing different light paths designing scheme and different distortion correction parameters
Case.
The content of the invention
The present invention be in order to overcome the method for artificial detection to be in the prior art difficult the defects of quantitatively drawing distortion exactly,
The distortion measurement method and system of a kind of head-mounted display apparatus are provided.
The present invention solves the above problems by the following technical programs：
A kind of distortion measurement method of head-mounted display apparatus, including：
Detection image is projected using the display eyeglass of the head-mounted display apparatus and generates projected image；
The projected image is obtained using video camera；
The distortion of the head-mounted display apparatus is calculated according to the projected image.
Optionally, the detection image includes multigroup detection unit, and detection unit described in every group includes being sequentially arranged in
Test point on straight line, the straight line where the test point of different detection units are different；
The projected image includes multigroup projecting cell corresponding with the multigroup detection unit, projecting cell described in every group
Include the subpoint of the detection spot projection generation included by detection unit corresponding with the projecting cell；
It is described the head-mounted display apparatus is calculated according to the projected image aberration rate the step of specifically include：
Rectangular coordinate system is established in the projected image；
Obtain the coordinate data of each subpoint on projecting cell described in every group；
The distortion is calculated according to the coordinate data.
Optionally, described the step of calculating the distortion according to the coordinate data, specifically includes：
Calculate the length value of first subpoint and the line of the last one subpoint on projecting cell described in every group；
Calculate each the distance between the subpoint and the line value on the projecting cell；
The ratio of the distance value and the length value is calculated, and using the maximum in the ratio as the distortion.
Optionally, the display eyeglass using the head-mounted display apparatus projects detection image and generates throwing
The step of shadow image, specifically includes：
The detection image is projected and generated respectively using two display eyeglasses of the head-mounted display apparatus
The projected image；
Described the step of obtaining the projected image using video camera, specifically includes：
Obtain the projected image of the display eyeglass correspondence projection generation respectively using two video cameras.
Optionally, the video camera is conllinear with the primary optical axis of the display eyeglass；
And/or the field angle of the video camera is more than the theoretical field angle of the head-mounted display apparatus；
And/or the head-mounted display apparatus includes AR glasses or VR glasses.
The distortion measurement system of a kind of head-mounted display apparatus, including video camera and computing module；
The head-mounted display apparatus is used to carry out detection image by the display eyeglass of the head-mounted display apparatus
It projects and generates projected image；
The video camera is used to obtain the projected image；
The computing module is used to calculate the distortion of the head-mounted display apparatus according to the projected image.
Optionally, the distortion measurement system further includes establishment of coordinate system module and coordinate data acquisition module；
The detection image includes multigroup detection unit, and detection unit described in every group includes being sequentially arranged in straight line
On test point, straight line where the test point of different detection units is different；
The projected image includes multigroup projecting cell corresponding with the multigroup detection unit, projecting cell described in every group
Include the subpoint of the detection spot projection generation included by detection unit corresponding with the projecting cell；
The establishment of coordinate system module is used to establish rectangular coordinate system in the projected image；
The coordinate data acquisition module is used to obtain the number of coordinates of each subpoint on projecting cell described in every group
According to；
The computing module is used to calculate the distortion according to the coordinate data.
Optionally, the computing module for calculating, with the last one throw on projecting cell described in every group by first subpoint
The length value of the line of shadow point is additionally operable to calculate on the projecting cell each the distance between the subpoint and the line
Value；
The computing module is additionally operable to calculate the ratio of the distance value and the length value, and by the ratio most
Big value is used as the distortion.
Optionally, the distortion measurement system includes two video cameras；
The head-mounted display apparatus is used for two display eyeglasses by the head-mounted display apparatus respectively to described
Detection image is projected and generates the projected image；
Described two video cameras are used to obtain the projected image that the display eyeglass corresponds to projection generation respectively.
Optionally, the video camera is conllinear with the primary optical axis of the display eyeglass；
And/or the field angle of the video camera is more than the theoretical field angle of the head-mounted display apparatus；
And/or the head-mounted display apparatus includes AR glasses or VR glasses.
The positive effect of the present invention is：Human eye is replaced using video camera, shooting wear-type by video camera shows
The projected image that detection image projects in equipment, then projected image is analyzed, it is set so as to which the wear-type quantified is shown
Standby distortion.
Description of the drawings
Fig. 1 is the flow chart of the distortion measurement method of the head-mounted display apparatus of the embodiment of the present invention 1.
Fig. 2 be the embodiment of the present invention 2 head-mounted display apparatus distortion measurement method in step 130 idiographic flow
Figure.
Fig. 3 be the embodiment of the present invention 2 head-mounted display apparatus distortion measurement method in step 133 idiographic flow
Figure.
Fig. 4 is the structure diagram of the distortion measurement system of the head-mounted display apparatus of the embodiment of the present invention 4.
Fig. 5 is the structure diagram of the distortion measurement system of the head-mounted display apparatus of the embodiment of the present invention 5.
Specific embodiment
It is further illustrated the present invention below by the mode of embodiment, but does not therefore limit the present invention to the reality
It applies among a scope.The experimental method of actual conditions is not specified in the following example, according to conventional methods and conditions or according to business
Product specification selects.
Embodiment 1
A kind of distortion measurement method of head-mounted display apparatus, as shown in Figure 1, distortion measurement method includes：
Step 110 projects detection image using the display eyeglass of head-mounted display apparatus and generates projected image；
Step 120 obtains projected image using video camera；
Step 130, the distortion that head-mounted display apparatus is calculated according to projected image.
In the present embodiment, human eye is replaced using video camera, detection image on head-mounted display apparatus is shot by video camera
The projected image of projection, then analyze projected image, so as to the distortion of head-mounted display apparatus quantified.
Embodiment 2
As Figure 2-3, the distortion measurement method of the head-mounted display apparatus of the present embodiment is on the basis of embodiment 1
It is further improved, detection image includes multigroup detection unit, and every group of detection unit includes being arranged in order point-blank
Test point, the straight line where the test point of different detection units are different；
Projected image includes multigroup projecting cell corresponding with multigroup detection unit, and every group of projecting cell includes and projection
The subpoint of detection spot projection generation included by the corresponding detection unit of unit；
Step 130 specifically includes：
Step 131 establishes rectangular coordinate system on projection images；
Step 132, the coordinate data for obtaining each subpoint on every group of projecting cell；
Step 133 is calculated according to coordinate data and distorted.
Wherein, step 133 specifically includes：
Step 1331, the length for calculating first subpoint and the line of the last one subpoint on every group of projecting cell
Value；
Step 1332 calculates each the distance between subpoint and line value on projecting cell；
Step 1333, the ratio for calculating distance value and length value, and using the maximum in ratio as distortion.
The distortion measurement method of the head-mounted display apparatus of the present embodiment is illustrated below by a specific example, is detected
Image uses black and white chessboard table images, and the crosspoint of black square and white square is test point, crosspoint composition detection on a same row
Unit after video camera obtains projected image, can identify subpoint, with the throwing of wherein a line according to the pixel of captured image
Exemplified by shadow point, it is assumed that P1~PNFor the subpoint of a certain projecting cell in projected image, the coordinate of subpoint is respectively (x1,y1)、
(x2,y2)…(xN,yN)；
Wherein, i=1, the number that 2 ... N, N are subpoint, L are the 1st subpoint and the line of the last one subpoint
Length, diFor i-th of subpoint to the vertical range of the line, σ is distortion.
Embodiment 3
The distortion measurement method of the head-mounted display apparatus of the present embodiment is further improved on the basis of embodiment 1,
Step 110 specifically includes：
Detection image is projected respectively using two display eyeglasses of head-mounted display apparatus and generates projected image；
Step 120 specifically includes：
Obtain the projected image that display eyeglass corresponds to projection generation respectively using two video cameras.
Wherein, video camera is conllinear with the primary optical axis for showing eyeglass；The field angle of video camera is more than head-mounted display apparatus
Theoretical field angle；Head-mounted display apparatus includes AR glasses or VR glasses.
In the present embodiment, the throwing on two display eyeglasses of head-mounted display apparatus is obtained respectively with two video cameras respectively
Shadow image, and be respectively calculated, while in order to get complete effective projected image, the field angle of video camera, which is more than, to be worn
The theoretical field angle of formula display device, and video camera is conllinear with the primary optical axis for showing eyeglass, in addition to ensuring result of calculation
Accuracy will carry out anti-distortion processing, to exclude to take the photograph according to itself distortion of video camera after obtaining projected image to projected image
The influence of the distortion measurement of the distortion head-mounted display device of camera itself.
Embodiment 4
The distortion measurement system of a kind of head-mounted display apparatus, as shown in figure 4, the distortion measurement system includes video camera
1 and computing module 2；
The head-mounted display apparatus is used to carry out detection image by the display eyeglass 3 of the head-mounted display apparatus
It projects and generates projected image；
The video camera 1 is used to obtain the projected image；
The computing module 2 is used to calculate the distortion of the head-mounted display apparatus according to the projected image.
In the present embodiment, human eye is replaced using video camera, detection image on head-mounted display apparatus is shot by video camera
The projected image of projection, then analyze projected image, so as to the distortion of head-mounted display apparatus quantified.
Embodiment 5
The distortion measurement method of the head-mounted display apparatus of the present embodiment is further improved on the basis of embodiment 1,
As shown in figure 5, the distortion measurement system further includes establishment of coordinate system module 5 and coordinate data acquisition module 4；
The detection image includes multigroup detection unit, and detection unit described in every group includes being sequentially arranged in straight line
On test point, straight line where the test point of different detection units is different；
The projected image includes multigroup projecting cell corresponding with the multigroup detection unit, projecting cell described in every group
Include the subpoint of the detection spot projection generation included by detection unit corresponding with the projecting cell；
The establishment of coordinate system module 5 is used to establish rectangular coordinate system in the projected image；
The coordinate data acquisition module 4 is used to obtain the number of coordinates of each subpoint on projecting cell described in every group
According to；
The computing module 2 is used to calculate the distortion according to the coordinate data.
Specifically, the computing module 2 is for calculating described in every group on projecting cell first subpoint and the last one
The length value of the line of subpoint, be additionally operable to calculate on the projecting cell it is each between the subpoint and the line away from
From value；
The computing module 2 is additionally operable to calculate the ratio of the distance value and the length value, and will be in the ratio
Maximum is as the distortion.
The distortion measurement method of the head-mounted display apparatus of the present embodiment is illustrated below by a specific example, is detected
Image uses black and white chessboard table images, and the crosspoint of black square and white square is test point, crosspoint composition detection on a same row
Unit after video camera obtains projected image, can identify subpoint, with the throwing of wherein a line according to the pixel of captured image
Exemplified by shadow point, it is assumed that P1~PNFor the subpoint of a certain projecting cell in projected image, the coordinate of subpoint is respectively (x1,y1)、
(x2,y2)…(xN,yN)；
Wherein, i=1, the number that 2 ... N, N are subpoint, L are the 1st subpoint and the line of the last one subpoint
Length, diFor i-th of subpoint to the vertical range of the line, σ is distortion.
Embodiment 6
The distortion measurement method of the head-mounted display apparatus of the present embodiment is further improved on the basis of embodiment 5,
As shown in the figure, the distortion measurement system includes two video cameras；
The head-mounted display apparatus is used for two display eyeglasses by the head-mounted display apparatus respectively to described
Detection image is projected and generates the projected image；
Described two video cameras are used to obtain the projected image that the display eyeglass 3 corresponds to projection generation respectively.
Wherein, the video camera is conllinear with the primary optical axis of the display eyeglass；The field angle of the video camera 1 is more than described
The theoretical field angle of head-mounted display apparatus；The head-mounted display apparatus includes AR glasses or VR glasses.
In the present embodiment, the throwing on two display eyeglasses of head-mounted display apparatus is obtained respectively with two video cameras respectively
Shadow image, and be respectively calculated, while in order to get complete effective projected image, the field angle of video camera, which is more than, to be worn
The theoretical field angle of formula display device, and video camera is conllinear with the primary optical axis for showing eyeglass, in addition to ensuring result of calculation
Accuracy will carry out anti-distortion processing, to exclude to take the photograph according to itself distortion of video camera after obtaining projected image to projected image
The influence of the distortion measurement of the distortion head-mounted display device of camera itself.
Although specific embodiments of the present invention have been described above, it will be appreciated by those of skill in the art that this is only
For example, protection scope of the present invention is to be defined by the appended claims.Those skilled in the art without departing substantially from
On the premise of the principle and substance of the present invention, many changes and modifications may be made, but these change and
Modification each falls within protection scope of the present invention.
Claims (10)
1. a kind of distortion measurement method of head-mounted display apparatus, which is characterized in that the distortion measurement method includes：
Detection image is projected using the display eyeglass of the head-mounted display apparatus and generates projected image；
The projected image is obtained using video camera；
The distortion of the head-mounted display apparatus is calculated according to the projected image.
2. the distortion measurement method of head-mounted display apparatus as described in claim 1, which is characterized in that the detection image bag
Multigroup detection unit is included, detection unit described in every group includes being arranged in order test point point-blank, and difference detection is single
Straight line where the test point of member is different；
The projected image includes multigroup projecting cell corresponding with the multigroup detection unit, and projecting cell described in every group wraps
Include the subpoint of the detection spot projection generation included by detection unit corresponding with the projecting cell；
It is described the head-mounted display apparatus is calculated according to the projected image aberration rate the step of specifically include：
Rectangular coordinate system is established in the projected image；
Obtain the coordinate data of each subpoint on projecting cell described in every group；
The distortion is calculated according to the coordinate data.
3. the distortion measurement method of head-mounted display apparatus as claimed in claim 2, which is characterized in that described according to the seat
The step of mark data calculate the distortion specifically includes：
Calculate the length value of first subpoint and the line of the last one subpoint on projecting cell described in every group；
Calculate each the distance between the subpoint and the line value on the projecting cell；
The ratio of the distance value and the length value is calculated, and using the maximum in the ratio as the distortion.
4. the distortion measurement method of head-mounted display apparatus as described in claim 1, which is characterized in that described to utilize the head
The display eyeglass for wearing formula display device projects detection image and is specifically included the step of generating projected image：
The detection image is projected respectively and is generated described using two display eyeglasses of the head-mounted display apparatus
Projected image；
Described the step of obtaining the projected image using video camera, specifically includes：
Obtain the projected image of the display eyeglass correspondence projection generation respectively using two video cameras.
5. the distortion measurement method of head-mounted display apparatus as described in claim 1, which is characterized in that the video camera and institute
The primary optical axis for stating display eyeglass is conllinear；
And/or the field angle of the video camera is more than the theoretical field angle of the head-mounted display apparatus；
And/or the head-mounted display apparatus includes AR glasses or VR glasses.
6. the distortion measurement system of a kind of head-mounted display apparatus, which is characterized in that the distortion measurement system includes video camera
And computing module；
The head-mounted display apparatus is used to project detection image by the display eyeglass of the head-mounted display apparatus
And generate projected image；
The video camera is used to obtain the projected image；
The computing module is used to calculate the distortion of the head-mounted display apparatus according to the projected image.
7. the distortion measurement system of head-mounted display apparatus as claimed in claim 6, which is characterized in that the distortion measurement system
System further includes establishment of coordinate system module and coordinate data acquisition module；
The detection image includes multigroup detection unit, and detection unit described in every group includes being arranged in order point-blank
Test point, the straight line where the test point of different detection units are different；
The projected image includes multigroup projecting cell corresponding with the multigroup detection unit, and projecting cell described in every group wraps
Include the subpoint of the detection spot projection generation included by detection unit corresponding with the projecting cell；
The establishment of coordinate system module is used to establish rectangular coordinate system in the projected image；
The coordinate data acquisition module is used to obtain the coordinate data of each subpoint on projecting cell described in every group；
The computing module is used to calculate the distortion according to the coordinate data.
8. the distortion measurement system of head-mounted display apparatus as claimed in claim 7, which is characterized in that the computing module is used
In the length value for calculating first subpoint and the line of the last one subpoint on projecting cell described in every group, it is additionally operable to calculate
Each the distance between the subpoint and the line value on the projecting cell；
The computing module is additionally operable to calculate the ratio of the distance value and the length value, and by the maximum in the ratio
As the distortion.
9. the distortion measurement system of head-mounted display apparatus as claimed in claim 6, which is characterized in that the distortion measurement system
System includes two video cameras；
The head-mounted display apparatus is used for two display eyeglasses by the head-mounted display apparatus respectively to the detection
Image is projected and generates the projected image；
Described two video cameras are used to obtain the projected image that the display eyeglass corresponds to projection generation respectively.
10. the distortion measurement system of head-mounted display apparatus as claimed in claim 6, which is characterized in that the video camera with
The primary optical axis of the display eyeglass is conllinear；
And/or the field angle of the video camera is more than the theoretical field angle of the head-mounted display apparatus；
And/or the head-mounted display apparatus includes AR glasses or VR glasses.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711437454.5A CN108124152A (en) | 2017-12-26 | 2017-12-26 | The distortion measurement method and system of head-mounted display apparatus |
| PCT/CN2017/119707 WO2019127319A1 (en) | 2017-12-26 | 2017-12-29 | Distortion measurement method and system for head-mounted display device |
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| CN201711437454.5A CN108124152A (en) | 2017-12-26 | 2017-12-26 | The distortion measurement method and system of head-mounted display apparatus |
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| CN110880188A (en) * | 2018-09-06 | 2020-03-13 | 舜宇光学（浙江）研究院有限公司 | Calibration method, calibration device and calibration system for near-eye display optical system |
| CN110967166A (en) * | 2018-09-28 | 2020-04-07 | 舜宇光学（浙江）研究院有限公司 | Detection method, detection device and detection system of near-eye display optical system |
| CN111609995A (en) * | 2019-02-26 | 2020-09-01 | 弗提图德萨沃有限公司 | Optical module assembly and debugging test method and device |
| CN113099203A (en) * | 2021-05-10 | 2021-07-09 | 青岛小鸟看看科技有限公司 | Display system calibration method and system |
| CN113138066A (en) * | 2020-01-16 | 2021-07-20 | 舜宇光学（浙江）研究院有限公司 | External distortion detection method, system and platform thereof and electronic equipment |
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| WO2019127319A1 (en) | 2019-07-04 |
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Application publication date: 20180605 |