CN108289211B - Eye protection method for virtual reality head display equipment - Google Patents
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- CN108289211B CN108289211B CN201710063083.2A CN201710063083A CN108289211B CN 108289211 B CN108289211 B CN 108289211B CN 201710063083 A CN201710063083 A CN 201710063083A CN 108289211 B CN108289211 B CN 108289211B
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
- G09G5/02—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators characterised by the way in which colour is displayed
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- H—ELECTRICITY
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- H—ELECTRICITY
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- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N13/00—Stereoscopic video systems; Multi-view video systems; Details thereof
- H04N13/10—Processing, recording or transmission of stereoscopic or multi-view image signals
- H04N13/106—Processing image signals
- H04N13/133—Equalising the characteristics of different image components, e.g. their average brightness or colour balance
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- H—ELECTRICITY
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- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N13/00—Stereoscopic video systems; Multi-view video systems; Details thereof
- H04N13/10—Processing, recording or transmission of stereoscopic or multi-view image signals
- H04N13/106—Processing image signals
- H04N13/15—Processing image signals for colour aspects of image signals
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Abstract
An eye protection method for a virtual reality head display device, comprising the steps of: step S1 of converting a first pixel of an image of a stereoscopic image represented in an RGB color space into a second pixel represented in a YUV color space, step S2 of determining a color vector based on the second pixel; the color vector is used to reduce the blue component B of the first pixel and increase the red component R of the first pixel and/or the green component G of the first pixel, thereby adjusting the luminance component Y of the second pixel to Y1; wherein Y1 is greater than or equal to α Y and less than or equal to Y; alpha is a preset constant, and alpha is more than 0 and less than 1; step S3, the color vector is added to the first pixel to obtain the first pixel after color matching. The eye protection method reduces the blue component of the pixel on the basis of keeping the brightness component, thereby realizing the effect of protecting eyesight.
Description
Technical Field
The invention relates to the technical field of virtual reality, in particular to an eye protection method for a virtual reality head display device.
Background
The virtual reality head display equipment adopts a near-to-eye display technology; the stereo image light is projected to the left eye and the right eye of a person to form stereo vision. For the virtual reality head display device, the device is generally not recommended to be worn for a long time in consideration of the damage of light generated by the device to eyes.
Specifically, color images are generally represented by three primary colors, red, green, and blue, wherein the energy of the blue component is strongest. The wavelength of the high-energy blue light which is very easy to cause damage is 380nm-450 nm. Studies of the effects on retinal pigment have shown that cells will lose activity when exposed to light with wavelengths in the range of 415nm to 450 nm. In the long run, the probability of macular degeneration will increase dramatically. These all show that: when the blue light irradiates the eyes for a long time, the blue light can cause great damage to the retina, and can induce dry eye, asthenopia and biological clock disorder, and can seriously cause macular degeneration, impaired vision and even blindness of the eyes. In addition, the blue light also interferes with the secretion of melatonin by the human body, so that people are difficult to fall asleep. In this case, virtual reality device providers may devise various methods to suppress blue light, however, the brightness of the image may be reduced while suppressing blue light.
Disclosure of Invention
The invention provides an eye protection method for a virtual reality head display device aiming at the technical problems.
The technical scheme provided by the invention for solving the technical problem is as follows:
the invention provides an eye protection method for virtual reality head display equipment, which comprises the following steps:
step S1 of converting a first pixel in RGB color space of an image of a stereoscopic video into a second pixel in YUV color space, where Y is (0.257 · R) + (0.504 · G) + (0.098 · B) + 16; wherein Y is a luminance component of the second pixel; r is the red component of the first pixel; g is a green component of the first pixel; b is a blue component of the first pixel;
step S2, determining a color vector based on the second pixel; the color vector is used to reduce the blue component B of the first pixel and increase the red component R of the first pixel and/or the green component G of the first pixel, thereby adjusting the luminance component Y of the second pixel to Y1; wherein Y1 is greater than or equal to α Y and less than or equal to Y; alpha is a preset constant, and alpha is more than 0 and less than 1;
step S3, the color vector is added to the first pixel to obtain the first pixel after color matching.
In the above eye protection method of the present invention, in step S2, the color vector is used to adjust the blue component B of the first pixel to B · B, the red component R of the first pixel to R · R, and the green component G of the first pixel to G · G; wherein 0< b < 1; at least one of r and g is greater than 1; b is a preset blue adjustment coefficient, r is a red adjustment coefficient, and g is a green adjustment coefficient.
In the above eye protection method of the present invention, step S3 further includes: and performing truncation processing on the first pixel after color matching, wherein the truncation function of the truncation processing is as follows:
R′＝cut(R·r)
G′＝cut(G·g)
B′＝B·b
wherein, R' is the red component of the first pixel after the color modulation and the truncation processing;
g' is a green component of the first pixel which is subjected to the color modulation and the truncation treatment in sequence;
b' is the blue component of the first pixel after the color modulation and the truncation processing;
r is the red component of the first pixel;
g is a green component of the first pixel;
b is a blue component of the first pixel;
r is a red adjustment coefficient;
g is a green adjustment coefficient;
b is a preset blue adjustment coefficient.
In the above eye protection method of the present invention, step S2 further includes:
setting a proportionality coefficient a, wherein g is r.a; in [1, r ]max]Taking the value of a red adjustment coefficient r; wherein the content of the first and second substances,
rmax＝(0.859-0.98·b)/(0.257+0.504·a)；
r is a red adjustment coefficient;
g is a green adjustment coefficient;
b is a preset blue adjustment coefficient.
In the above eye protection method of the present invention, before step S1, the eye protection method further includes:
step S101, calculating the sum of blue light components of all first pixels of the image of the stereoscopic image, judging whether the sum of the blue light components is smaller than a preset blue light component sum threshold value, if so, stopping executing the step S1-step S3; if not, the steps S1-S3 are executed.
In the eye protection method of the present invention, the stereoscopic image includes a first image and a second image, a parallax exists between the first image and the second image, and the first image and the second image are used for being projected to left and right eyes of a user respectively; defining the steps S1-S3 as a blue suppressing process, before the step S1, the eye protecting method further includes:
the blue suppressing process is performed on only one of the first image and the second image during the same period of time.
In the above eye protection method of the present invention, the eye protection method further includes: the blue suppressing process is alternately performed on the first image and the second image.
In the eye protection method of the present invention, the stereoscopic image includes a first image and a second image, a parallax exists between the first image and the second image, and the first image and the second image are used for being projected to left and right eyes of a user respectively; defining steps S1-S3 of a preset blue adjustment coefficient b >0.7 as a blue weak suppression process, and defining steps S1-S3 of a preset blue adjustment coefficient b <0.5 as a blue strong suppression process; the eye protection method further comprises the following steps:
the blue weak suppression process and the blue strong suppression process are alternately performed on the first image or the second image.
In the eye protection method of the present invention, the stereoscopic image includes a first image and a second image, a parallax exists between the first image and the second image, and the first image and the second image are used for being projected to left and right eyes of a user respectively; defining steps S1-S3 of a preset blue adjustment coefficient b <0.5 as a blue strong suppression process; the eye protection method further comprises the following steps:
the blue strong suppression process is alternately performed and not performed on the first image or the second image.
The eye protection method of the present invention converts a first pixel in RGB color space into a second pixel in YUV color space, Y ═ 0.257 · R) + (0.504 · G) + (0.098 · B) + 16; then, determining a color vector based on the second pixel; the color vector is used for reducing the blue component B, increasing the red component R and/or the green component G, and stabilizing the brightness component Y in a certain range; then, the color vector is added to the first pixel to obtain the first pixel after color matching. The technical idea can reduce the blue component of the pixel on the basis of keeping the brightness component, thereby realizing the effect of protecting eyesight.
Drawings
The invention will be further described with reference to the accompanying drawings and examples, in which:
fig. 1 is a schematic view showing a flowchart of an eye protection method according to a first embodiment of the present invention.
Detailed Description
The technical problem to be solved by the invention is as follows: existing virtual reality device providers have devised various methods to suppress blue light, however, while suppressing blue light, the brightness of the image may decrease. The technical idea of the invention for solving the technical problem is as follows: converting a first pixel in RGB color space to a second pixel in YUV color space, Y ═ (0.257 · R) + (0.504 · G) + (0.098 · B) + 16; then, determining a color vector based on the second pixel; the color vector is used for reducing the blue component B, increasing the red component R and/or the green component G, and stabilizing the brightness component Y in a certain range; then, the color vector is added to the first pixel to obtain the first pixel after color matching. The technical idea can reduce the blue component of the pixel on the basis of keeping the brightness component, thereby realizing the effect of protecting eyesight.
In order to make the technical purpose, technical solutions and technical effects of the present invention more clear and facilitate those skilled in the art to understand and implement the present invention, the present invention will be further described in detail with reference to the accompanying drawings and specific embodiments.
First embodiment
Fig. 1 is a schematic view showing a flowchart of an eye protection method according to a first embodiment of the present invention. Specifically, the eye protection method for the virtual reality head display device provided by the embodiment includes the following steps:
And step 300, adding the color vector and the first pixel to obtain the first pixel after color mixing.
In the above-described embodiment, by setting Y1 between α Y and Y by the color vector, a function of stabilizing the luminance of the image of the stereoscopic image within a certain range while suppressing the blue component can be realized.
Further, in step 200, the color vector is used to adjust the blue component B of the first pixel to B · B, the red component R of the first pixel to R · R, and the green component G of the first pixel to G · G, where 0< B < 1; at least one of r and g is greater than 1; b is a preset blue adjustment coefficient, r is a red adjustment coefficient, and g is a green adjustment coefficient.
Step 300 further comprises: and performing truncation processing on the first pixel after color matching, wherein the truncation function of the truncation processing is as follows:
R′＝cut(R·r)
G′＝cut(G·g)
B′＝B·b
wherein, R' is the red component of the first pixel after the color modulation and the truncation processing;
g' is a green component of the first pixel which is subjected to the color modulation and the truncation treatment in sequence;
b' is the blue component of the first pixel after the color modulation and the truncation processing;
r is the red component of the first pixel;
g is a green component of the first pixel;
b is a blue component of the first pixel;
r is a red adjustment coefficient;
g is a green adjustment coefficient;
b is a preset blue adjustment coefficient.
By the clipping processing, neither the red component nor the green component of the first pixel subjected to the toning and clipping processing exceeds 255.
Further, step 300 further comprises: and displaying the first pixel subjected to color mixing and truncation by adopting virtual reality head display equipment.
Further, step 200 further comprises: setting a proportionality coefficient a, wherein g is r.a; in this embodiment, a is taken to be 1, so that g is taken to be r; thus, the red light component and the green light component compensate the luminance component synchronously while the blue light component is suppressed; in other embodiments, if it is desired that the pixel be greenish in hue, a >1 may be taken; if it is desired that the pixel be more red-shaded, a <1 can be taken.
Further, in the present embodiment, since Y1 is less than or equal to Y, there are:
(0.257·R·r)+(0.504·G·r·a)+(0.098·B·b)≤(0.257·R)+(0.504·G)+(0.098·B)
the brightness adjustment is performed by taking a white color palette, that is, when R ═ G ═ B, there are:
(0.257·r)+(0.504·r·a)+(0.098·b)≤0.257+0.504+0.098
r≤(0.859-0.98·b)/(0.257+0.504·a)
let r bemaxR is ≦ r for (0.859-0.98 · b)/(0.257+0.504 · a)max。
Based on the above calculation results, in step 200, in [1, r ]max]And taking the value of the red adjustment coefficient r.
Further, prior to step 100, the method of eye protection further comprises:
calculating the sum of blue light components of all first pixels of the image of the stereoscopic image, judging whether the sum of the blue light components is smaller than a preset blue light component sum threshold value, and if so, stopping executing the steps 100-300; if not, step 100-step 300 are executed. After the eye protection method of the first embodiment is adopted, the whole picture of the image is yellow.
Second embodiment
The second embodiment is realized based on the first embodiment, and specifically, the stereoscopic image includes a first image and a second image, a parallax exists between the first image and the second image, and the first image and the second image are used for being projected to left and right eyes of a user respectively, so that the user experiences a stereoscopic effect of the stereoscopic image. Defining steps 100-300 as a blue-color suppression process, prior to step 100, the method of eye-shielding further comprises:
the blue suppressing process is performed on only one of the first image and the second image during the same period of time.
Preferably, the eye-shielding method further comprises: the blue suppressing process is alternately performed on the first image and the second image. Here, the period of time for performing the blue suppressing process on the first picture and the period of time for performing the blue suppressing process on the second picture may be different or the same. By the method, only blue light of a left eye can be inhibited in one time period, only blue light of a right eye can be inhibited in another time period, so that one eye can always see an image with good blue color retention, the binocular vision is finally synthesized to obtain good color protection, and the irradiation of the blue light to the eyes is reduced in the cumulative effect; in addition, compared with a single blue light prevention coating and a simple whole-picture blue light pressing, the color effect of the method is better maintained.
Third embodiment
The third embodiment is realized based on the first embodiment. Specifically, the stereoscopic image includes a first image and a second image, a parallax exists between the first image and the second image, and the first image and the second image are used for being projected to left and right eyes of a user respectively, so that the user can experience a stereoscopic effect of the stereoscopic image. Defining the steps 100-300 of the preset blue adjustment coefficient b >0.7 as a blue weak inhibition process, and defining the steps 100-300 of the preset blue adjustment coefficient b <0.5 as a blue strong inhibition process; the eye protection method further comprises the following steps:
the blue weak suppression process and the blue strong suppression process are alternately performed on the first image or the second image.
Here, the execution period of the blue weak suppression process and the execution period of the blue strong suppression process may be different or the same.
Alternatively, the eye-shielding method further comprises:
the blue strong suppression process is alternately performed and not performed on the first image or the second image.
Here, the execution period of the blue strong suppressing process and the non-execution period of the blue strong suppressing process may be different or the same.
The eye-protecting method of the third embodiment can improve the eye comfort of the user. When the alternating frequency of the blue weak suppression process and the blue strong suppression process, or the alternating frequency of the execution and non-execution of the blue strong suppression process is larger, human eyes do not feel that the picture is jumpy, the whole picture is yellow, but the image brightness is brighter.
It will be understood that modifications and variations can be made by persons skilled in the art in light of the above teachings and all such modifications and variations are intended to be included within the scope of the invention as defined in the appended claims.
Claims (8)
1. An eye protection method for a virtual reality head display device is characterized by comprising the following steps:
step S1, converting a first pixel in RGB color space of an image of a stereoscopic video into a second pixel in YUV color space, where Y is (0.257 · R) + (0.504 · G) + (0.098 · B) + 16; wherein Y is a luminance component of the second pixel; r is the red component of the first pixel; g is a green component of the first pixel; b is a blue component of the first pixel;
step S2, determining a color vector based on the second pixel; the color vector is used to reduce the blue component B of the first pixel and increase the red component R of the first pixel and/or the green component G of the first pixel, thereby adjusting the luminance component Y of the second pixel to Y1; wherein Y1 is greater than or equal to α Y and less than or equal to Y; alpha is a preset constant, and alpha is more than 0 and less than 1; the method comprises the steps of obtaining new R1, G1 and B1 by adjusting Y to Y1, wherein R1 is a red component under Y1 luminance component, G1 is a green component under Y1 luminance component, B1 is a blue component under Y1 luminance component, R1 is larger than R and/or G1 is larger than G, B1 is smaller than B, and the difference value between R1, G1, B1 and R, G, B is a color vector;
step S3, adding the color vector and the first pixel to obtain a first pixel after color mixing, wherein the blue component B of the first pixel is adjusted to be B.b, the red component R of the first pixel is adjusted to be R.r, and the green component G of the first pixel is adjusted to be G.g; wherein 0< b < 1; at least one of r and g is greater than 1; b is a preset blue adjustment coefficient, r is a red adjustment coefficient, and g is a green adjustment coefficient.
2. The method of eye protection of claim 1, wherein step S3 further comprises: and performing truncation processing on the first pixel after color matching, wherein the truncation function of the truncation processing is as follows:
R′＝cut(R·r)
G′＝cut(G·g)
B′＝B·b
wherein, R' is the red component of the first pixel after the color modulation and the truncation processing; g' is a green component of the first pixel which is subjected to the color modulation and the truncation treatment in sequence; b' is the blue component of the first pixel after the color modulation and the truncation processing; r is the red component of the first pixel;
g is a green component of the first pixel; b is a blue component of the first pixel; r is a red adjustment coefficient; g is a green adjustment coefficient; b is a preset blue adjustment coefficient.
3. The method of eye protection of claim 2, wherein step S2 further comprises: setting a proportionality coefficient a, wherein g is r.a; taking the value of the red adjustment coefficient r in [1, rmax ]; where rmax ═ 0.859-0.98 · b)/(0.257+0.504 · a);
r is a red adjustment coefficient; g is a green adjustment coefficient; b is a preset blue adjustment coefficient.
4. The method of protecting eye of claim 1, wherein prior to step S1, the method further comprises: step S101, calculating the sum of blue light components of all first pixels of the image of the stereoscopic image, judging whether the sum of the blue light components is smaller than a preset blue light component sum threshold value, if so, stopping executing the step S1-step S3; if not, the steps S1-S3 are executed.
5. The eye protection method according to claim 1, wherein the stereoscopic image comprises a first image and a second image, a parallax exists between the first image and the second image, and the first image and the second image are used for being projected to left and right eyes of a user respectively; defining the steps S1-S3 as a blue suppressing process, before the step S1, the eye protecting method further includes:
the blue suppressing process is performed on only one of the first image and the second image during the same period of time.
6. The method of eye protection of claim 5, further comprising: the blue suppressing process is alternately performed on the first image and the second image.
7. The eye protection method according to claim 1, wherein the stereoscopic image comprises a first image and a second image, a parallax exists between the first image and the second image, and the first image and the second image are used for being projected to left and right eyes of a user respectively; defining steps S1-S3 of a preset blue adjustment coefficient b >0.7 as a blue weak suppression process, and defining steps S1-S3 of a preset blue adjustment coefficient b <0.5 as a blue strong suppression process; the eye protection method further comprises the following steps:
the blue weak suppression process and the blue strong suppression process are alternately performed on the first image or the second image.
8. The eye protection method according to claim 1, wherein the stereoscopic image comprises a first image and a second image, a parallax exists between the first image and the second image, and the first image and the second image are used for being projected to left and right eyes of a user respectively; defining steps S1-S3 of a preset blue adjustment coefficient b <0.5 as a blue strong suppression process; the eye protection method further comprises the following steps:
the blue strong suppression process is alternately performed and not performed on the first image or the second image.
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| CN201710063083.2A CN108289211B (en) | 2017-01-10 | 2017-01-10 | Eye protection method for virtual reality head display equipment |
| PCT/CN2017/116905 WO2018130050A1 (en) | 2017-01-10 | 2017-12-18 | Eye protection method for virtual reality head display equipment |
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| CN201710063083.2A CN108289211B (en) | 2017-01-10 | 2017-01-10 | Eye protection method for virtual reality head display equipment |
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| WO2018130050A1 (en) | 2018-07-19 |
| CN108289211A (en) | 2018-07-17 |
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