CN109739460B - VR display method and equipment, and computer readable storage medium - Google Patents
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- 230000006837 decompression Effects 0.000 claims abstract description 50
- 230000006835 compression Effects 0.000 claims description 10
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- 230000007246 mechanism Effects 0.000 claims description 7
- 238000004422 calculation algorithm Methods 0.000 claims description 6
- 238000006073 displacement reaction Methods 0.000 claims description 6
- 238000001514 detection method Methods 0.000 claims description 5
- 238000004590 computer program Methods 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 9
- 238000012545 processing Methods 0.000 abstract description 9
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- 230000005540 biological transmission Effects 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 230000004438 eyesight Effects 0.000 description 1
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Abstract
The invention discloses a VR display method and equipment and a computer readable storage medium. One embodiment of the method comprises: dividing the VR display screen into a first display area, a second display area and a third display area, wherein the first display area is a central area of a visible area determined according to a field angle and a lens, the second display area is an edge area of the visible area, and the third display area is other display areas except the visible area; and respectively decompressing the display data of the first display area, the second display area and the third display area based on different decompression resolutions, and then displaying the display data, wherein the decompression resolution of the first display area is greater than that of the second display area, and the decompression resolution of the second display area is greater than that of the third display area. According to the embodiment, the display effect can be ensured, meanwhile, the processing performance of the GPU is saved, and the display screen refresh rate is favorably improved.
Description
Technical Field
The invention relates to the technical field of display. And more particularly, to a VR display method and apparatus, and a computer-readable storage medium.
Background
The nature of the VR display device itself dictates higher demands on the display: higher resolution, higher PPI (screen pixel density) and higher refresh rate. The processor in the VR display device or the processor in the remote computer device usually adopts a compression mode to reduce the data transmission amount when processing the display data, then the display module of the VR display device decompresses the received display data and displays the decompressed display data, and the compression/decompression mode not only can reduce the pressure of the system data throughput, but also can achieve the effect of reducing the power consumption of the whole computer.
In the conventional display data decompression process, no matter lossy compression or lossless compression is performed, the display data of each display area of the VR display screen is decompressed and displayed according to the same resolution. This approach may cause the same high definition display to be performed in the invisible area, resulting in a waste of GPU (graphics processing unit) processing performance, which hinders the improvement of the display screen refresh rate.
Therefore, it is desirable to provide a new VR display method and apparatus, and a computer-readable storage medium.
Disclosure of Invention
An object of the present invention is to provide a VR display method and apparatus, and a computer-readable storage medium, so as to solve at least one of the problems in the prior art.
In order to achieve the purpose, the invention adopts the following technical scheme:
a first aspect of the present invention provides a VR display method, including:
dividing a VR display screen into a first display area, a second display area and a third display area, wherein the first display area is a central area of a visible area determined according to a field angle and a lens, the second display area is an edge area of the visible area, and the third display area is other display areas except the visible area;
respectively decompressing the display data of a first display area, a second display area and a third display area based on different decompression resolutions, and then displaying, wherein the decompression resolution of the first display area is greater than that of the second display area, and the decompression resolution of the second display area is greater than that of the third display area.
In the VR display method provided by the first aspect of the present invention, high-resolution and rich-color display is performed in the first display region with the highest attention degree, and low-resolution display is performed in the second display region with the lower attention degree and the third display region with the lowest attention degree. The display effect can be ensured, meanwhile, the processing performance of the GPU is saved, and the display screen refresh rate is favorably improved.
Preferably, the central region is determined according to a preset viewing angle and a lens.
Preferably, the preset viewing angle is a 30 ° viewing angle. The central area determined by the 30-degree visual line angle and the lens can accurately mark the area with the highest fixation degree.
Preferably, the method further comprises: the pupil center position of the user is detected, and the lens position is adjusted according to the pupil center position of the user, so that the lens center is aligned with the pupil center of the user. By adopting the optimal mode, the display effect can be improved, the center of the visible area of the VR display screen can be dynamically adjusted based on the adjustment of the position of the lens, and the first display area, the second display area and the third display area can be accurately divided.
Preferably, decompressing the display data of the first display region further comprises decompressing the display data of the first display region based on a decompression resolution or an image enhancement algorithm that is the same as the compression resolution.
Preferably, the method further comprises: and decompressing the specific display data by adopting a preset mode. By adopting the optimal mode, the flexibility of the display data decompression modes at different positions on the VR display screen can be improved.
Preferably, the method further comprises: and calculating distortion coefficients of different positions of the VR display screen, and adjusting the decompression resolution of the display data of each position according to the distortion coefficients. The display effect can be improved by adopting the optimal mode.
In a second aspect, the invention provides a VR display device comprising a processor, a lens, a display module and a VR display screen,
the processor is used for dividing the VR display screen into a first display area, a second display area and a third display area, wherein the first display area is a central area of a visible area determined according to a field angle and the lens, the second display area is an edge area of the visible area, and the third display area is other display areas except the visible area;
the display module assembly is used for decompressing respectively based on different decompression resolutions and is in behind the display data of first display area, second display area and third display area the VR display screen shows, wherein, the decompression resolution ratio of first display area is greater than the decompression resolution ratio of second display area, the decompression resolution ratio of second display area is greater than the decompression resolution ratio of third display area.
Preferably, the apparatus further comprises a pupil center detecting device and a displacement mechanism;
the pupil center detection device is used for detecting the pupil center position of the user;
the processor is used for driving the displacement mechanism to adjust the position of the lens according to the pupil center position of the user, so that the center of the lens is aligned with the pupil center of the user.
A third aspect of the invention provides a computer readable storage medium having stored thereon a computer program which, when executed by a processor, performs the method provided by the first aspect of the invention.
The invention has the following beneficial effects:
the technical scheme of the invention can ensure the display effect, save the processing performance of the GPU and be beneficial to improving the refresh rate of the display screen.
Drawings
The following describes embodiments of the present invention in further detail with reference to the accompanying drawings;
fig. 1 is a flowchart illustrating a VR display method according to an embodiment of the present invention.
Fig. 2 is a schematic diagram illustrating the division of the first display area, the second display area, and the third display area.
Fig. 3 shows a schematic diagram of a VR display device provided by an embodiment of the invention.
Detailed Description
In order to more clearly illustrate the invention, the invention is further described below with reference to preferred embodiments and the accompanying drawings. Similar parts in the figures are denoted by the same reference numerals. It is to be understood by persons skilled in the art that the following detailed description is illustrative and not restrictive, and is not to be taken as limiting the scope of the invention.
As shown in fig. 1 and 2, an embodiment of the present invention provides a VR display method, including:
dividing a VR display screen into a first display area, a second display area and a third display area, wherein the first display area is a central area of a visible area determined according to a field of view (FOV) and a lens, such as a central circular area A in FIG. 2; the second display area is an edge area of the visible area, such as the annular area B surrounding the central circular area in fig. 2; the third display area is other display areas except the visible area, such as area C in fig. 2; it can be understood that there is no intersection among the first display area, the second display area and the third display area, that is, there is no situation of partial overlap;
and respectively decompressing the display data of the first display area, the second display area and the third display area based on different decompression resolutions, and then displaying the display data, wherein the decompression resolution of the first display area is greater than that of the second display area, and the decompression resolution of the second display area is greater than that of the third display area. For example: the compression resolution of the display data is 4:4:4, and the decompression resolution of the first display area is 4:4:4, namely the display data of the first display area is subjected to lossless decompression, and complete display data restoration is realized; the decompression resolution of the second display area is 4:4: 2; the decompression resolution of the third display region is 4:4: 0.
In the VR display method provided by the first aspect of the present invention, high-resolution and rich-color display is performed in the first display region with the highest attention degree, and low-resolution display is performed in the second display region with the lower attention degree and the third display region with the lowest attention degree. The display effect can be ensured, meanwhile, the processing performance of the GPU is saved, and the display screen refresh rate is favorably improved.
In some alternative implementations of the present embodiment, the central region is determined based on a preset viewing angle and a lens. Further, the preset viewing angle is 30 ° viewing angle as shown in fig. 2 ± 30 °. The central area determined by the 30-degree visual line angle and the lens can accurately mark the area with the highest fixation degree.
In some optional implementations of this embodiment, the method further includes: the pupil center position of the user is detected, and the lens position is adjusted according to the pupil center position of the user, so that the lens center is aligned with the pupil center of the user. By adopting the implementation mode, the display effect can be improved, the center of the visible area of the VR display screen can be dynamically adjusted (the center of the visible area of the VR display screen is aligned with the center of the lens and the center of the pupil of a user) based on the adjustment of the position of the lens, the first display area, the second display area and the third display area can be accurately divided, and the purposes of protecting eyesight and reducing fatigue can be achieved.
In some optional implementations of the present embodiment, decompressing the display data of the first display region further includes decompressing the display data of the first display region based on a decompression resolution or an image enhancement algorithm (e.g., a color depth enhancement algorithm, etc.) that is the same as the compression resolution. For example: the compression resolution of the display data is 4:4:4, the decompression resolution of the first display area is 4:4:4, the decompression resolution of the second display area is 4:4:2, and the decompression resolution of the third display area is 4:4: 0. Alternatively, the display data is compressed based on 4:4:4 resolution or by 8-bit; decompressing the first display area according to the mapping relation of the color depth of 12-bit by a color depth enhancement algorithm to complete the expansion of the gray scale space from 512 to 4096; the second display area is subjected to 5-bit decompression by referring to an 8-bit compression mechanism; the third display region is decompressed based on a 4:4:4 resolution. By adopting the implementation mode, the lossless decompression can be carried out on the display data of the first display area, the complete display data restoration is realized, or the display data of the first display area is subjected to enhancement processing display, so that the first display area of the VR display screen displays richer colors, and the more comfortable color transition of human eyes is realized.
In some optional implementations of this embodiment, the method further includes: and decompressing the specific display data by adopting a preset mode. No matter which display area of the first display area, the second display area and the third display area (the specific area can be understood as various manners such as containing, contained and partially overlapped), the specific display data, such as a bloody fishy violence scene in a VR game scene, only the brightness value in the YUV format is decompressed for the specific display data, so that the brightness of the specific area corresponding to the bloody violent scene is reduced and changed into gray or black, and the rendering difficulty of the GPU is further reduced. By adopting the implementation mode, the flexibility of the display data decompression modes at different positions on the VR display screen can be improved. In addition, the sight line of the user can be tracked, and the area with low fixation degree can be filled by adopting the picture of the area in the previous frame of image.
In some optional implementation manners of this embodiment, to improve the display effect, the method further includes: and calculating distortion coefficients of different positions of the VR display screen, and adjusting the decompression resolution of the display data of each position according to the distortion coefficients. Since the distortion forms of different regions are different in near-eye display, the distortion at the edge position is much larger than that at the center position, and the amount of data to be filled in for the edge position is relatively large, the decompression scheme of this implementation includes decompression resolution adjustment of different degrees for positions with different distortion forms. The calculation process of the distortion coefficients for different positions is as follows: the texture mapping is to correspond the texture coordinates and the NDC coordinates one to one and to map the texture coordinates and the NDC coordinates to corresponding grids. The input to the antialiasing algorithm contains the number of grid rows and columns (left and right eye grids tiled to the screen), so the screen grid coordinates need to be converted to NDC coordinates. For NDC coordinates (x ', y') corresponding to any screen grid coordinate (x, y), the calculation relationship is as follows:
wherein, eye is 0, 1 represents the left screen and right screen respectively; tesselationsX represents the total number of columns of the grid; tesselationsY represents the total number of rows in the grid.
And determining which value K is between K [0.. 10] according to the comparison between tan theta and MaxR. According to the following steps:
the formula for calculating the distortion coefficient K is:
K＝(p 0 *(1+2t)+m 0 *t)*(1-t) 2
+(p 1 *(1+2(1-t))-m 1 *(1-t))*t 2 。
in the VR display device at the AP end, an important factor that restricts the display refresh rate is weak GPU rendering capability. For example, a 4K binocular screen with a resolution of 2160x3840 has a refresh rate of around 110Hz, calculated from the data volume transfer point of view, whereas VR display devices on the AP side can only reach 75Hz at maximum. The biggest factor is the limited GPU rendering capability. In the VR display device, the user does not pay attention to the whole VR display screen, and the degree of attention differs between the center area and the edge area even in the visible area. Therefore, after the VR display method provided by this embodiment divides the area of the VR display screen, high-definition display is performed in the key attention area, and relatively low-resolution display is performed in the non-key area, so that the GPU rendering load is reduced, and the frame rate of GPU image rendering is improved.
As shown in fig. 3, another embodiment of the present invention provides a VR display device, which includes a processor, lenses, a display module, and a VR display screen, wherein the VR display screen includes two VR display screens corresponding to a left eye and a right eye respectively, and includes two lenses corresponding to a left eye and a right eye respectively; it can be understood that a VR display screen and a lens can be used to implement VR display by disposing a polarizer and the like;
the processor is used for dividing the VR display screen into a first display area, a second display area and a third display area, wherein the first display area is a central area of a visible area determined according to the field angle and the lens, the second display area is an edge area of the visible area, and the third display area is other display areas except the visible area;
the display module assembly for based on different decompression resolutions decompress and show at the VR display screen behind the display data of first display area, second display area and third display area respectively, wherein, the decompression resolution ratio of first display area is greater than the decompression resolution ratio of second display area, and the decompression resolution ratio of second display area is greater than the decompression resolution ratio of third display area.
In some optional implementations of this embodiment, the apparatus further comprises a pupil center detection device and a displacement mechanism;
the pupil center detection device is used for detecting the pupil center position of the user and transmitting the pupil center position to the processor through an I2C/SPI bus;
and the processor is used for driving the displacement mechanism to adjust the position of the lens according to the pupil center position of the user so as to enable the center of the lens to be aligned with the pupil center of the user, and meanwhile, the processor can also dynamically adjust the center of the visible area of the VR display screen according to the adjustment based on the position of the lens (so that the center of the visible area of the VR display screen is aligned with the center of the lens and the pupil center of the user). In addition, the processor can transmit the compressed display data to the display module through the MIPI protocol. It will be appreciated that the processor in the VR display device that performs the functions of processing the display data, etc., may also be implemented by a processor in a remote computer device.
It should be noted that the principle and the workflow of the VR display device provided in this embodiment are similar to those of the VR display method, and reference may be made to the above description for relevant parts, which are not described herein again.
The embodiment also provides a nonvolatile computer storage medium, which may be the nonvolatile computer storage medium included in the above-mentioned apparatus in the above-mentioned embodiment, or may be a nonvolatile computer storage medium that exists separately and is not assembled in the terminal. The non-volatile computer storage medium stores one or more programs that, when executed by a device, cause the device to: dividing the VR display screen into a first display area, a second display area and a third display area, wherein the first display area is a central area of a visible area determined according to a field angle and a lens, the second display area is an edge area of the visible area, and the third display area is other display areas except the visible area; and respectively decompressing the display data of the first display area, the second display area and the third display area based on different decompression resolutions, and then displaying the display data, wherein the decompression resolution of the first display area is greater than that of the second display area, and the decompression resolution of the second display area is greater than that of the third display area.
It is to be noted that, in the description of the present invention, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
It should be understood that the above-mentioned embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention, and it will be obvious to those skilled in the art that other variations and modifications can be made on the basis of the above description, and all embodiments cannot be exhaustive, and all obvious variations and modifications belonging to the technical scheme of the present invention are within the protection scope of the present invention.
Claims (8)
1. A VR display method, comprising:
dividing a VR display screen into a first display area, a second display area and a third display area, wherein the first display area is a central area of a visible area determined according to a field angle and a lens, the second display area is an edge area of the visible area, and the third display area is other display areas except the visible area;
respectively decompressing display data of a first display area, a second display area and a third display area based on different decompression resolutions, and then displaying the display data, wherein the decompression resolution of the first display area is greater than that of the second display area, and the decompression resolution of the second display area is greater than that of the third display area;
wherein,
the method also comprises decompressing the specific display data in a preset mode; the decompressing of the specific display data in the preset mode comprises decompressing only the brightness value of the specific display data, so that the specific area corresponding to the specific display data is displayed in gray or black;
the method further comprises the following steps: and calculating distortion coefficients of different positions of the VR display screen, and adjusting the decompression resolution of the display data of each position according to the distortion coefficients.
2. The method of claim 1, wherein the central region is determined based on a preset viewing angle and a lens.
3. The method of claim 2, wherein the predetermined line of sight angle is a 30 ° line of sight angle.
4. The method of claim 1, further comprising: the pupil center position of the user is detected, and the lens position is adjusted according to the pupil center position of the user, so that the lens center is aligned with the pupil center of the user.
5. The method of claim 1, wherein decompressing the display data of the first display region further comprises decompressing the display data of the first display region based on a decompression resolution or an image enhancement algorithm that is the same as the compression resolution.
6. A VR display device comprises a processor, a lens, a display module and a VR display screen,
the processor is used for dividing the VR display screen into a first display area, a second display area and a third display area, wherein the first display area is a central area of a visible area determined according to a field angle and the lens, the second display area is an edge area of the visible area, and the third display area is other display areas except the visible area;
the display module is used for respectively decompressing display data of a first display area, a second display area and a third display area based on different decompression resolutions and then displaying the data on the VR display screen, wherein the decompression resolution of the first display area is greater than that of the second display area, and the decompression resolution of the second display area is greater than that of the third display area;
the processor is further configured to decompress specific display data in a preset manner, including decompressing only brightness values of the specific display data;
the display module is also used for displaying a specific area corresponding to the specific display data in gray or black;
the processor is further used for calculating distortion coefficients of different positions of the VR display screen and adjusting decompression resolution of display data of each position according to the distortion coefficients.
7. The apparatus of claim 6, further comprising a pupil center detection device and a displacement mechanism;
the pupil center detection device is used for detecting the pupil center position of the user;
the processor is used for driving the displacement mechanism to adjust the position of the lens according to the pupil center position of the user, so that the center of the lens is aligned with the pupil center of the user.
8. A computer-readable storage medium, on which a computer program is stored which, when being executed by a processor, carries out the method according to any one of claims 1-5.
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| CN111314687B (en) | 2019-11-28 | 2021-06-25 | 歌尔光学科技有限公司 | VR image processing method and device, VR glasses and readable storage medium |
| CN110830783B (en) * | 2019-11-28 | 2021-06-01 | 歌尔光学科技有限公司 | VR image processing method and device, VR glasses and readable storage medium |
| CN112214193B (en) * | 2020-06-24 | 2021-08-03 | 深圳一点通显示有限公司 | Edge display system and method under multichannel data optimization |
| CN114900731B (en) * | 2022-03-31 | 2024-04-09 | 咪咕文化科技有限公司 | Video definition switching method and device |
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