CN209433126U - Naked eye 3D Helmet Mounted Display - Google Patents

Abstract

The utility model provides a kind of naked eye 3D Helmet Mounted Display, including shell；Optical medium；Projector, projector project single primary colour image to optical medium；Camera, camera take pictures to the figure being projected on optical medium generating sampled images；Processor, processor calculate the base angle parameter θ of the vertical trapezium of sampled images using image processing techniques；Coordinate converter, coordinate converter samples the coordinate of each pixel of the original image, and brings coordinate and base angle parameter θ into preset formula, by changing Coordinate generation anti-distortion image；Optical medium, projector and camera are embedded at shell, and projector and camera are oppositely arranged with optical medium, and processor is connect with projector and camera respectively, and coordinate converter is connect with projector and processor respectively.Compared with the relevant technologies, naked eye 3D Helmet Mounted Display provided by the utility model can effectively solve the trapezoidal distortion of projected image.

Description

Naked eye 3D Helmet Mounted Display

[technical field]

The utility model relates to technical field of image processing more particularly to a kind of naked eye 3D Helmet Mounted Displays.

[background technique]

Helmet Mounted Display is proposed first by the Ivan of nineteen sixty-eight Harvard University, and designs the entitled Bodhidharma gram using CRT Benefit this sword Helmet Mounted Display.By the development of many years, Helmet Mounted Display achieves huge progress and is widely applied.It is special It is not in liquid crystal micro display, virtual reality, pocket computer, visual mobile telephone and the equipment of modern digital army Gradually popularize so that Helmet Mounted Display occupies consequence in these areas.Either require in real world The data of needs are seen in visual field simultaneously, still to experience the telepresenc physically and mentally put into when visual pattern variation, simulated training, 3D game, tele-medicine and operation, or the visual capacity of human eye is extended using infrared, microscope, electron microscope, all It is applied.

However, inevitably, 3D Helmet Mounted Display can more or less have the trapezoidal mistake of projected image in imaging Very, to seriously affect viewing and the game experiencing of user.It is found through scientific research, causes the main of image trapezoidal distortion Problem is due to projection device and projected background out of plumb, and causing imaging with target image, there are biggish differences.

In order to solve the problems, such as image fault, the 3D helmet of mainstream is mostly binocular helmet currently on the market, i.e. head There are two displays for helmet tool, and the image that left eye is seen is the image that left display provides, and the image that right eye is seen is right display The image provided, such as the VR helmet etc..The naked eye 3D helmet of the relevant technologies generally requires to carry out by complicated instrument and equipment On the other hand calibration also can in this way, which the instrument and equipment of too complex on the one hand can not be designed in the helmet of narrow space Increase calibration cost, and calibration process is complex.If judging whether calibration is target image by the subjectivity of user, due to Everyone observation ability, assessment judgment is different, and also leading to the result calibrated out, there are huge othernesses.

Therefore, it is necessary to provide the new naked eye 3D Helmet Mounted Display of one kind to solve the above problems.

[utility model content]

The technical problem to be solved by the present invention is to provide a kind of naked eye 3D Helmet Mounted Displays, including

Shell；

Optical medium；

Projector, the projector project monochromatic original image to the optical medium；

Camera, the camera take pictures to the figure being projected on the optical medium generating sampled images；

Processor, the processor calculate the base angle ginseng of the vertical trapezium of the sampled images using image processing techniques Number θ；Further include

Coordinate converter, the coordinate converter sample the coordinate of each pixel of the original image, and by the coordinate And the base angle parameter θ brings preset formula into, by changing the Coordinate generation anti-distortion image；

The optical medium, the projector and the camera are embedded at the shell, the projector and described Camera is oppositely arranged with the optical medium, and the processor is connect with the projector and the camera respectively, institute Coordinate converter is stated to connect with the projector and the processor respectively.

Preferably, the camera falls in the geometric center of the optical medium to the orthographic projection of the optical medium.

Preferably, the coordinate converter using bilinear interpolation method samples the coordinate and by the coordinate and the bottom Angular dimensions θ brings the preset formula into and generates the anti-distortion image.

Preferably, the preset formula are as follows:

Y=y；

X=(x-w/2) * w*h/ [(w-2*h*tan θ) * h+2*h*tan θ * y]+w/2；

Wherein, X and Y is respectively the transverse and longitudinal coordinate value of single pixel point in the anti-distortion image, and x and y are respectively described The transverse and longitudinal coordinate value of single pixel point in original image, h are the height of the anti-distortion image, and w is the anti-distortion image bottom row Pixel number, and the pixel number phase of the pixel number of the anti-distortion image bottom row and the original image bottom row Together.

Preferably, the optical medium is semi reflective mirror.

Preferably, picture comparative device is provided, after the anti-distortion image generates, the projector is thrown to the optical medium Anti-distortion image described in shadow, the camera are taken pictures generation calibration image, and the picture comparative device is by the calibration image and institute Original image is stated to be compared.

Compared with the relevant technologies, the naked eye 3D Helmet Mounted Display of the utility model, the base angle by calculating sampled images is joined Number θ simultaneously brings the coordinate of the base angle parameter θ and each pixel of original image into preset formula, finally by the change coordinate Generate the anti-distortion image, the effective solution keystoning problem of naked eye 3D Helmet Mounted Display projected image improves The experience sense of user.

[Detailed description of the invention]

It, below will be to required in embodiment description in order to illustrate more clearly of the technical scheme in the embodiment of the utility model Attached drawing to be used is briefly described, it should be apparent that, the accompanying drawings in the following description is only some realities of the utility model Example is applied, it for those of ordinary skill in the art, without creative efforts, can also be according to these attached drawings Obtain other attached drawings, in which:

Fig. 1 is optical medium, projector, camera, processor in naked eye 3D Helmet Mounted Display provided by the utility model And the connection schematic diagram of coordinate converter；

Fig. 2 is the schematic diagram of the sampled images of naked eye 3D Helmet Mounted Display provided by the utility model；

Fig. 3 is the schematic diagram of the anti-distortion image of naked eye 3D Helmet Mounted Display provided by the utility model；

Fig. 4 is the work flow diagram of naked eye 3D Helmet Mounted Display provided by the utility model.

[specific embodiment]

The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model Clearly and completely describing, it is clear that described embodiment is only a part of the embodiment of the utility model, rather than whole Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work All other embodiment obtained, fall within the protection scope of the utility model.

Fig. 1 to Fig. 3 is please referred to, the utility model provides a kind of naked eye 3D Helmet Mounted Display, including shell, optics Medium 20, projector 30, camera 40, processor 50, coordinate converter 60 and picture comparative device.

The optical medium 20, the projector 30 and the camera 40 are embedded at the shell, and the projection Instrument 30 and the camera 40 are oppositely arranged with the optical medium 20.The projector 30 is used to obtain original image information, And monochromatic original image is projected on the optical medium 20, the camera 40 is used for the figure being projected on the optical medium Shape is taken pictures.

The processor 50 is connect with the projector 30 and the camera 40 respectively, and the coordinate converter 60 is distinguished It is connect with the projector 30 and the processor 50.Wherein, the processor 50 and the projector 30 and the camera Connection type between 40 can be electrical connection or communication connection, similarly, the coordinate converter 60 and the projector 30 and Connection type between the processor 50 may be electrical connection or communication connection.

Specifically, please referring to Fig. 4, the workflow of the naked eye 3D Helmet Mounted Display is as follows:

Step 1: the projector 30 projects monochromatic original image to the optical medium 20；In the present embodiment, described Original image is pure green rectangular image, due to the processing technology of the optical medium 20 and the difference of parameter, by the projection Vertical trapezium distortion occurs in 20 meeting of optical medium for the original image after instrument 30 projects.

The optical medium 20 is transparent or semitransparent display media.Preferably, in the present embodiment, the optics Medium 20 is semi reflective mirror.

Step 2: the camera 40 take pictures generating sample graph to the figure being projected on the optical medium 20 Picture；Preferably, the camera 40 falls in the geometric center of the optical medium 20 to the orthographic projection of the optical medium 20.? That is in a calibration process, the camera 40 is placed in close to the position of human eye, so shooting user makes With the image actually seen in the process.

Step 3: the processor 50 calculates the base angle of the vertical trapezium of the sampled images using image processing techniques Parameter θ；

Step 4: the coordinate converter 60 samples the coordinate of each pixel of the original image, and by the coordinate and The base angle parameter θ brings preset formula into, by changing the Coordinate generation anti-distortion image.

Specifically, the coordinate converter 60 using bilinear interpolation method samples the coordinate and by the coordinate and described Base angle parameter θ brings preset formula into and generates the anti-distortion image.

More specifically, the preset formula are as follows:

It enables the pixel number of the anti-distortion image bottom row be equal to the pixel number of the original image bottom row, and is W, the height of the anti-distortion image are h, and the transverse and longitudinal coordinate value of single pixel point is respectively X and Y, institute in the anti-distortion image The transverse and longitudinal coordinate value for stating single pixel point in original image is respectively x and y, that is, is had,

Y=y；(0≤y≤h)

X=(x-w/2) * w*h/ [(w-2*h*tan θ) * h+2*h*tan θ * y]+w/2 (0≤x≤w)

By calculating the base angle parameter θ of sampled images and by the base angle parameter θ and the coordinate of each pixel of original image Bring preset formula into, finally by changing anti-distortion image described in the Coordinate generation, the effective solution naked eye 3D helmet is aobvious The keystoning problem for showing device projected image improves the experience sense of user.

Step 5: after anti-distortion image generation, the projector 30 projects described anti-to the optical medium 20 Fault image, the camera 40 are taken pictures generation calibration image, and the picture comparative device is by the calibration image and the original image As being compared.

By the way that the picture comparative device is arranged, if after picture comparative device comparison, the calibration image and the original Image still has notable difference, then determines calibration failure, restart to compare；If the calibration image and the original image without Notable difference then determines to calibrate successfully, and calibration is completed.

The picture comparative device is the dsp chip of the model TMSC2000 of Texas Instruments.

Compared with the relevant technologies, the naked eye 3D Helmet Mounted Display of the utility model, the base angle by calculating sampled images is joined Number θ simultaneously brings the coordinate of the base angle parameter θ and each pixel of original image into preset formula, finally by the change coordinate Generate the anti-distortion image, the effective solution keystoning problem of naked eye 3D Helmet Mounted Display projected image improves The experience sense of user.

Above-described is only the embodiments of the present invention, it should be noted here that for the ordinary skill of this field For personnel, without departing from the concept of the present invention, improvement can also be made, but these belong to it is practical Novel protection scope.

Claims (6)

1. a kind of naked eye 3D Helmet Mounted Display, including

Shell；

Optical medium；

Projector, the projector project monochromatic original image to the optical medium；

Camera, the camera take pictures to the figure being projected on the optical medium generating sampled images；

Processor, the processor calculate the base angle parameter θ of the vertical trapezium of the sampled images using image processing techniques； It is characterized in that, further including

Coordinate converter, the coordinate converter sample the coordinate of each pixel of the original image, and by the coordinate and institute It states base angle parameter θ and brings preset formula into, by changing the Coordinate generation anti-distortion image；

The optical medium, the projector and the camera are embedded at the shell, the projector and the camera shooting Head is oppositely arranged with the optical medium, and the processor is connect with the projector and the camera respectively, the seat Mark converter is connect with the projector and the processor respectively.

2. naked eye 3D Helmet Mounted Display according to claim 1, which is characterized in that the camera is to the optical medium Orthographic projection fall in the geometric center of the optical medium.

3. naked eye 3D Helmet Mounted Display according to claim 1, which is characterized in that the coordinate converter uses bilinearity Interpolation method, which samples the coordinate and brings the coordinate and the base angle parameter θ into the preset formula, generates the anti-distortion figure Picture.

4. naked eye 3D Helmet Mounted Display according to claim 3, which is characterized in that the preset formula are as follows:

Y=y；

X=(x-w/2) * w*h/ [(w-2*h*tan θ) * h+2*h*tan θ * y]+w/2；

Wherein, X and Y is respectively the transverse and longitudinal coordinate value of single pixel point in the anti-distortion image, and x and y are respectively the original image The transverse and longitudinal coordinate value of single pixel point as in, h are the height of the anti-distortion image, and w is the picture of the anti-distortion image bottom row Vegetarian refreshments number, and the pixel number of the anti-distortion image bottom row is identical as the pixel number of the original image bottom row.

5. naked eye 3D Helmet Mounted Display according to claim 1, which is characterized in that the optical medium is semi reflective mirror.

6. naked eye 3D Helmet Mounted Display according to claim 4, which is characterized in that provide picture comparative device, it is described resist it is abnormal After becoming image generation, the projector projects the anti-distortion image to the optical medium, and the camera, which is taken pictures, generates school The calibration image is compared with the original image for quasi- image, the picture comparative device.