CN109429054A - VR method for compressing image and its device - Google Patents
VR method for compressing image and its device Download PDFInfo
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- CN109429054A CN109429054A CN201710716058.XA CN201710716058A CN109429054A CN 109429054 A CN109429054 A CN 109429054A CN 201710716058 A CN201710716058 A CN 201710716058A CN 109429054 A CN109429054 A CN 109429054A
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Abstract
The invention discloses a kind of VR method for compressing image and its devices, extract right and left eyes image from VR image and are compared, and are then compressed respectively for basic data and variance data.VR method for compressing image and its device through the invention can greatly improve the picture compression efficiency of VR image, improve efficiency of transmission, keep the image resolution ratio of VR equipment higher, to bring the better visual experience of user.
Description
[technical field]
The present invention relates to field of image processing more particularly to a kind of VR method for compressing image and its device.
[background technique]
With the continuous development of computer technology, VR (virtual reality) technology has applies more and more.And VR schemes
The resolution ratio of picture is also higher and higher, so as to compress to VR image when data transmission, improves efficiency of transmission.
VR image is compressed using traditional method for compressing image, available certain effect.But if considering
The characteristics of to VR image itself, each width VR image is all made of the left-eye image and eye image that are not much different, can be adopted
Compression of images is carried out to it with certain method, obtains higher compression efficiency.
[summary of the invention]
The technical problem to be solved by the present invention is how to improve the picture compression efficiency of VR image.
In order to solve the above technical problems, the present invention provides a kind of VR method for compressing image and its devices, from VR image
In extract right and left eyes image and be compared, then compressed respectively for basic data and variance data, to mention significantly
The high picture compression efficiency of VR image.
The present invention is achieved through the following technical solutions:
Provide a kind of VR method for compressing image, the method the following steps are included: pre-processed to original image,
Obtain left-eye image and eye image；Left-eye image and eye image are compared, basic data and variance data are obtained；To base
Plinth data and variance data are compressed.
A kind of VR method for compressing image as described above uses different pressures to the basic data and the variance data
Contracting method is compressed.
A kind of VR method for compressing image as described above carries out each row of the left-eye image and the eye image
Compare, obtains the basic data and variance data of every a line.
A kind of VR method for compressing image as described above, to the left-eye image and the eye image using differential technique into
Row compares, and is basic data with the left-eye image, using the eye image for the left-eye image difference as difference number
According to.
A kind of VR method for compressing image as described above compresses the variance data using vernier method.
A kind of VR method for compressing image as described above further includes by the adjacent of the left-eye image and the eye image
Two rows or multirow are compared.
The present invention also provides a kind of VR image compressing device, the device includes: preprocessing module, the pretreatment
Module is used to obtain left-eye image and eye image from original image；Comparison module, the comparison module are used for the left side
Eye image and the eye image are compared, and obtain basic data and variance data；Compression module, the compression module are used for
The basic data and the variance data are compressed.
A kind of VR image compressing device as described above, the compression module include that the first compression unit and the second compression are single
Member is respectively adopted different compress modes and is compressed.
A kind of VR image compressing device as described above, further includes row segmentation module, and the row segmentation module is used for institute
It states left-eye image and the eye image is divided into the data of behavior unit.
In conclusion extracting left and right from VR image the present invention provides a kind of VR method for compressing image and its device
Eye image is compared, and is then compressed respectively for basic data and variance data.VR compression of images through the invention
Method and device thereof can greatly improve the picture compression efficiency of VR image, improve efficiency of transmission, make the image resolution of VR equipment
Rate is higher, to bring the better visual experience of user.
[Detailed description of the invention]
Fig. 1 is the method flow diagram of first embodiment of the invention.
Fig. 2 is the structure chart of second embodiment of the invention.
[specific embodiment]
Reach the technical means and efficacy that predetermined purpose is taken for the present invention is further explained, below in conjunction with attached drawing and reality
Example is applied, to a specific embodiment of the invention, detailed description are as follows.
Fig. 1 is the method flow diagram of first embodiment of the invention.This method comprises the following steps:
Step 101: original image being pre-processed, left-eye image and eye image are obtained.
Left-eye image PL and eye image PR, left-eye image PL and right eye are extracted from VR original image by pretreatment
Image PR image resolution ratio having the same.
Step 102: left-eye image and eye image being compared, basic data and variance data are obtained.
PLijIndicate the pixel value of the i-th row jth column of left-eye image PL.PRijIndicate the i-th row jth column of eye image PR
Pixel value.Left-eye image PL is compared with eye image PR, obtains basic data P and variance data Δ P.PijIndicate base
The pixel value of plinth data the i-th row jth column.ΔPijIndicate the pixel value of variance data the i-th row jth column.
In the present embodiment, the format of image can be rgb format, yuv format or other formats.To left-eye image PL
Differential technique is used compared with eye image PR, is chosen left-eye image PL and is used as basis data P, eye image PR and left-eye image
The difference of PL is as variance data Δ P.
P=PL；
Δ P=PR-PL；
Pij=PLij；
ΔPij=PRij-PLij。
Certainly, eye image PR can also be chosen as basic data P, by left-eye image PL and eye image in the present invention
The difference of PR is as variance data Δ P.
Step 103: basic data and variance data are compressed.
Basic data P and variance data Δ P can be compressed using different compression methods.Due to left-eye image PL
It is similar image with eye image PR, so the value of variance data Δ P is very small, thus to variance data Δ P using suitable
Method compressed, such as vernier method or other suitable methods, good compression effectiveness can be obtained.And for basic number
According to P, can be compressed using the method met H.264 or H.265.
In the present invention, step 102 can also will compare left-eye image PL and eye image PR with behavior unit
Compared with.Such as: the 1st row left-eye image will be chosen as basis data P, by the first row to line n eye image and the 2nd row to n-th
The difference of row left-eye image and the 1st row left-eye image is as variance data Δ P；Then the (n+1)th row left-eye image conduct is chosen again
Basic data P, the (n+1)th row to 2n row eye image and the n-th+2 row are to 2n row left-eye image and the (n+1)th row left-eye image
Difference chooses a line left-eye image as basic data P, by its lower n-1 row left side every n row as variance data Δ P ... ...
Eye image is compared with n row eye image with the row left-eye image, using their difference as variance data Δ P.By this
Method compares left-eye image and eye image, obtains a small amount of basic data P and a large amount of variance data Δ P, thus
Available higher compression efficiency in step 103.In the present invention, n can choose 2 or 2 or more any value.
Such as the structure chart that Fig. 2 is second embodiment of the invention.In the present embodiment, VR image compressing device includes: pretreatment
Module 201, comparison module 202 and compression module 203.Preprocessing module 201 is connect with comparison module 202, is used for from original graph
Left-eye image PL and eye image PR is obtained as in；Comparison module 202 connects with preprocessing module 201 and compression module 203 respectively
It connects, for left-eye image PL and eye image PR to be compared, obtains basic data P and variance data Δ P；Compression module
203 connect with comparison module 202, for compressing to basic data P and variance data Δ P.
In the present invention, basic data P and variance data Δ P can be compressed using different compression methods, because
And compression module 203 includes two compression modules, the first compression module and the second compression module, and different compression sides is respectively adopted
Formula compresses basic data P and variance data Δ P.
In the present invention, VR image compressing device can also want left-eye image PL and eye image PR with behavior unit
It is compared.Thus, VR image compressing device includes row segmentation module, and row segmentation module is used for left-eye image PL and right eye figure
As PR is divided into the data of behavior unit.
It is of the invention it is a kind of be only to illustrate the principle of the present invention in above-mentioned lifted embodiment, rather than to limit this hair
Bright, all this kind is according to the present invention or the equivalent transformation of the prior art is that those skilled in the art is become apparent from,
It ought to be within the scope of presently disclosed protection.
Claims (9)
1. a kind of VR method for compressing image, the method the following steps are included:
Original image is pre-processed, left-eye image and eye image are obtained；
Left-eye image and eye image are compared, basic data and variance data are obtained；
Basic data and variance data are compressed.
2. according to the method described in claim 1, it is characterized by: to the basic data and the variance data using different
Compression method compressed.
3. method according to claim 1 or 2, it is characterised in that: by the every of the left-eye image and the eye image
A line is compared, and obtains the basic data and variance data of every a line.
4. according to the method described in claim 3, it is characterized by: using difference to the left-eye image and the eye image
Method is compared, and is basic data with the left-eye image, is poor with difference of the eye image for the left-eye image
Heteromerism evidence.
5. according to the method described in claim 3, it is characterized by: being compressed to the variance data using vernier method.
6. according to the method described in claim 3, it is characterized by also including by the left-eye image and the eye image
Adjacent rows or multirow are compared.
7. a kind of VR image compressing device, the device include:
Preprocessing module, the preprocessing module are used to obtain left-eye image and eye image from original image；
Comparison module, the comparison module obtain basic number for the left-eye image and the eye image to be compared
According to and variance data；
Compression module, the compression module is for compressing the basic data and the variance data.
8. device according to claim 7, it is characterised in that: the compression module includes the first compression unit and the second pressure
Contracting unit is respectively adopted different compress modes and is compressed.
9. device according to claim 7, it is characterised in that: further include row segmentation module, the row segmentation module is used for
The left-eye image and the eye image are divided into the data of behavior unit.
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| CN201710716058.XA CN109429054A (en) | 2017-08-18 | 2017-08-18 | VR method for compressing image and its device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112383765A (en) * | 2020-11-10 | 2021-02-19 | 中移雄安信息通信科技有限公司 | VR image transmission method and device |
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| CN1545333A (en) * | 2003-11-21 | 2004-11-10 | �Ϻ���ͨ��ѧ | Method of three dimensional video image signal compression |
| WO2011001864A1 (en) * | 2009-07-01 | 2011-01-06 | ソニー株式会社 | Image processing device and image processing method |
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